2024 day 4.

Refactor 2024 day 3.
Add .drone.yml for CI. (#2 )
2024-12-04 07:35:22 +01:00 · 2024-12-03 15:22:54 +01:00 · 2024-12-03 13:38:03 +00:00 · 2024-12-03 14:11:29 +01:00 · 2024-12-03 08:29:25 +01:00 · 2024-12-02 18:44:50 +01:00
193 changed files with 3511 additions and 17480 deletions
--- a/poetry.lock
+++ b/poetry.lock
@ -1,15 +1,4 @@
-# This file is automatically @generated by Poetry 1.7.1 and should not be changed by hand.
-
-[[package]]
-name = "absl-py"
-version = "2.1.0"
-description = "Abseil Python Common Libraries, see https://github.com/abseil/abseil-py."
-optional = false
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-]
+# This file is automatically @generated by Poetry 1.8.4 and should not be changed by hand.

 [[package]]
 name = "appnope"
@ -144,30 +133,6 @@ traitlets = ">=4"
 [package.extras]
 test = ["pytest"]

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-version = "22.1.1.2"
-description = "A Python interface to the CPLEX Callable Library, Community Edition."
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-python-versions = "*"
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@ -214,19 +179,6 @@ files = [
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-[package.dependencies]
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-
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@ -255,50 +207,6 @@ files = [
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-
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@ -522,133 +430,68 @@ files = [

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@ -1308,40 +1026,90 @@ cffi = {version = "*", markers = "implementation_name == \"pypy\""}

 [[package]]
 name = "ruff"
-version = "0.8.3"
+version = "0.8.1"
 description = "An extremely fast Python linter and code formatter, written in Rust."
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 python-versions = ">=3.7"
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 ]

+[[package]]
+name = "scipy"
+version = "1.14.1"
+description = "Fundamental algorithms for scientific computing in Python"
+optional = false
+python-versions = ">=3.10"
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+]
+
+[package.dependencies]
+numpy = ">=1.23.5,<2.3"
+
+[package.extras]
+dev = ["cython-lint (>=0.12.2)", "doit (>=0.36.0)", "mypy (==1.10.0)", "pycodestyle", "pydevtool", "rich-click", "ruff (>=0.0.292)", "types-psutil", "typing_extensions"]
+doc = ["jupyterlite-pyodide-kernel", "jupyterlite-sphinx (>=0.13.1)", "jupytext", "matplotlib (>=3.5)", "myst-nb", "numpydoc", "pooch", "pydata-sphinx-theme (>=0.15.2)", "sphinx (>=5.0.0,<=7.3.7)", "sphinx-design (>=0.4.0)"]
+test = ["Cython", "array-api-strict (>=2.0)", "asv", "gmpy2", "hypothesis (>=6.30)", "meson", "mpmath", "ninja", "pooch", "pytest", "pytest-cov", "pytest-timeout", "pytest-xdist", "scikit-umfpack", "threadpoolctl"]
+
 [[package]]
 name = "six"
-version = "1.17.0"
+version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
-    {file = "six-1.17.0-py2.py3-none-any.whl", hash = "sha256:4721f391ed90541fddacab5acf947aa0d3dc7d27b2e1e8eda2be8970586c3274"},
-    {file = "six-1.17.0.tar.gz", hash = "sha256:ff70335d468e7eb6ec65b95b99d3a2836546063f63acc5171de367e834932a81"},
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
 ]

 [[package]]
@ -1477,20 +1245,6 @@ files = [
 docs = ["myst-parser", "pydata-sphinx-theme", "sphinx"]
 test = ["argcomplete (>=3.0.3)", "mypy (>=1.7.0)", "pre-commit", "pytest (>=7.0,<8.2)", "pytest-mock", "pytest-mypy-testing"]

-[[package]]
-name = "types-networkx"
-version = "3.4.2.20241115"
-description = "Typing stubs for networkx"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "types-networkx-3.4.2.20241115.tar.gz", hash = "sha256:d669b650cf6c6c9ec879a825449eb04a5c10742f3109177e1683f57ee49e0f59"},
-    {file = "types_networkx-3.4.2.20241115-py3-none-any.whl", hash = "sha256:f0c382924d6614e06bf0b1ca0b837b8f33faa58982bc086ea762efaf39aa98dd"},
-]
-
-[package.dependencies]
-numpy = ">=1.20"
-
 [[package]]
 name = "typing-extensions"
 version = "4.12.2"
@ -1527,4 +1281,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "5b57bccd8dc65a9acecbe187939bae625ef6a259f4188c6587907245bcfa604f"
+content-hash = "b643261f91a781d77735e05f6d2ac1002867600c2df6393a9d1a15f5e1189109"
--- a/pyproject.toml
+++ b/pyproject.toml
@ -12,12 +12,10 @@ python = "^3.10"
 numpy = "^2.1.3"
 tqdm = "^4.67.1"
 parse = "^1.20.2"
+scipy = "^1.14.1"
 sympy = "^1.13.3"
 networkx = "^3.4.2"
-pillow = "^11.0.0"
-imageio = "^2.36.1"
-pygifsicle = "^1.1.0"
-opencv-python = "^4.10.0.84"
+pandas = "^2.2.3"

 [tool.poetry.group.dev.dependencies]
 pyright = "^1.1.389"
@ -25,14 +23,6 @@ ruff = "^0.8.1"
 poethepoet = "^0.31.1"
 ipykernel = "^6.29.5"
 networkx-stubs = "^0.0.1"
-types-networkx = "^3.4.2.20241115"
-
-[tool.poetry.group.cplex.dependencies]
-docplex = "^2.28.240"
-cplex = "^22.1.1.2"
-
-[tool.poetry.group.ortools.dependencies]
-ortools = "^9.11.4210"

 [tool.poetry.scripts]
 holt59-aoc = "holt59.aoc.__main__:main"
--- a/src/holt59/aoc/2015/day1.py
+++ b/src/holt59/aoc/2015/day1.py
@ -1,12 +1,10 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+line = sys.stdin.read().strip()

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 floor = 0
-        floors = [(floor := floor + (1 if c == "(" else -1)) for c in input]
+floors = [(floor := floor + (1 if c == "(" else -1)) for c in line]

-        yield floors[-1]
-        yield floors.index(-1)
+
+print(f"answer 1 is {floors[-1]}")
+print(f"answer 2 is {floors.index(-1)}")
--- a/src/holt59/aoc/2015/day10.py
+++ b/src/holt59/aoc/2015/day10.py
@ -1,7 +1,7 @@
 import itertools
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+line = sys.stdin.read().strip()

 # see http://www.se16.info/js/lands2.htm for the explanation of 'atoms' (or elements)
 #
@ -9,7 +9,7 @@ from ..base import BaseSolver
 # CodeGolf answer https://codegolf.stackexchange.com/a/8479/42148

 # fmt: off
-ATOMS: list[tuple[str, tuple[int, ...]]] = [
+atoms = [
    ("22", (0, )),  # 0
    ("13112221133211322112211213322112", (71, 90, 0, 19, 2, )),  # 1
    ("312211322212221121123222112", (1, )),  # 2
@ -105,7 +105,7 @@ ATOMS: list[tuple[str, tuple[int, ...]]] = [
 ]
 # fmt: on

-STARTERS = [
+starters = [
    "1",
    "11",
    "21",
@ -122,26 +122,27 @@ def look_and_say_length(s: str, n: int) -> int:
    if n == 0:
        return len(s)

-    if s in STARTERS:
+    if s in starters:
        return look_and_say_length(
            "".join(f"{len(list(g))}{k}" for k, g in itertools.groupby(s)), n - 1
        )

-    counts = {i: 0 for i in range(len(ATOMS))}
-    idx = next(i for i, (a, _) in enumerate(ATOMS) if s == a)
+    counts = {i: 0 for i in range(len(atoms))}
+    idx = next(i for i, (a, _) in enumerate(atoms) if s == a)
    counts[idx] = 1

    for _ in range(n):
-        c2 = {i: 0 for i in range(len(ATOMS))}
+        c2 = {i: 0 for i in range(len(atoms))}
        for i in counts:
-            for j in ATOMS[i][1]:
+            for j in atoms[i][1]:
                c2[j] += counts[i]
        counts = c2

-    return sum(counts[i] * len(a[0]) for i, a in enumerate(ATOMS))
+    return sum(counts[i] * len(a[0]) for i, a in enumerate(atoms))


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any] | None:
-        yield look_and_say_length(input, 40)
-        yield look_and_say_length(input, 50)
+answer_1 = look_and_say_length(line, 40)
+print(f"answer 1 is {answer_1}")
+
+answer_2 = look_and_say_length(line, 50)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day11.py
+++ b/src/holt59/aoc/2015/day11.py
@ -1,7 +1,5 @@
 import itertools
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys


 def is_valid(p: str) -> bool:
@ -42,8 +40,10 @@ def find_next_password(p: str) -> str:
    return p


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        answer_1 = find_next_password(input)
-        yield answer_1
-        yield find_next_password(increment(answer_1))
+line = sys.stdin.read().strip()
+
+answer_1 = find_next_password(line)
+print(f"answer 1 is {answer_1}")
+
+answer_2 = find_next_password(increment(answer_1))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day12.py
+++ b/src/holt59/aoc/2015/day12.py
@ -1,7 +1,6 @@
 import json
-from typing import Any, Iterator, TypeAlias
-
-from ..base import BaseSolver
+import sys
+from typing import TypeAlias

 JsonObject: TypeAlias = dict[str, "JsonObject"] | list["JsonObject"] | int | str

@ -19,9 +18,10 @@ def json_sum(value: JsonObject, ignore: str | None = None) -> int:
        return 0


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        data: JsonObject = json.loads(input)
+data: JsonObject = json.load(sys.stdin)

-        yield json_sum(data)
-        yield json_sum(data, "red")
+answer_1 = json_sum(data)
+print(f"answer 1 is {answer_1}")
+
+answer_2 = json_sum(data, "red")
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day13.py
+++ b/src/holt59/aoc/2015/day13.py
@ -1,11 +1,10 @@
 import itertools
+import sys
 from collections import defaultdict
-from typing import Any, Iterator, Literal, cast
+from typing import Literal, cast

 import parse  # type: ignore

-from ..base import BaseSolver
-

 def max_change_in_happiness(happiness: dict[str, dict[str, int]]) -> int:
    guests = list(happiness)
@ -18,9 +17,7 @@ def max_change_in_happiness(happiness: dict[str, dict[str, int]]) -> int:
    )


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 happiness: dict[str, dict[str, int]] = defaultdict(dict)
 for line in lines:
@ -32,9 +29,13 @@ class Solver(BaseSolver):
    )
    happiness[u1][u2] = hap if gain_or_loose == "gain" else -hap

-        yield max_change_in_happiness(happiness)
+
+answer_1 = max_change_in_happiness(happiness)
+print(f"answer 1 is {answer_1}")
+
 for guest in list(happiness):
    happiness["me"][guest] = 0
    happiness[guest]["me"] = 0

-        yield max_change_in_happiness(happiness)
+answer_2 = max_change_in_happiness(happiness)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day14.py
+++ b/src/holt59/aoc/2015/day14.py
@ -1,10 +1,9 @@
+import sys
 from dataclasses import dataclass
-from typing import Any, Iterator, Literal, cast
+from typing import Literal, cast

 import parse  # type: ignore

-from ..base import BaseSolver
-

@dataclass(frozen=True)
 class Reindeer:
@ -14,9 +13,7 @@ class Reindeer:
    rest_time: int


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 reindeers: list[Reindeer] = []
 for line in lines:
@ -29,9 +26,7 @@ class Solver(BaseSolver):
        ),
    )
    reindeers.append(
-                Reindeer(
-                    name=reindeer, speed=speed, fly_time=speed_time, rest_time=rest_time
-                )
+        Reindeer(name=reindeer, speed=speed, fly_time=speed_time, rest_time=rest_time)
    )

 target = 1000 if len(reindeers) <= 2 else 2503
@ -42,7 +37,7 @@ class Solver(BaseSolver):
 distances: dict[Reindeer, int] = {reindeer: 0 for reindeer in reindeers}
 points: dict[Reindeer, int] = {reindeer: 0 for reindeer in reindeers}

-        for time in self.progress.wrap(range(target)):
+for time in range(target):
    for reindeer in reindeers:
        if states[reindeer][0] == "flying":
            distances[reindeer] += reindeer.speed
@ -59,5 +54,9 @@ class Solver(BaseSolver):
            else:
                states[reindeer] = ("resting", time + reindeer.rest_time)

-        yield max(distances.values())
-        yield max(points.values()) - 1
+
+answer_1 = max(distances.values())
+print(f"answer 1 is {answer_1}")
+
+answer_2 = max(points.values()) - 1
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day15.py
+++ b/src/holt59/aoc/2015/day15.py
@ -1,10 +1,9 @@
 import math
-from typing import Any, Iterator, Sequence, cast
+import sys
+from typing import Sequence, cast

 import parse  # type: ignore

-from ..base import BaseSolver
-

 def score(ingredients: list[list[int]], teaspoons: Sequence[int]) -> int:
    return math.prod(
@ -19,9 +18,7 @@ def score(ingredients: list[list[int]], teaspoons: Sequence[int]) -> int:
    )


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 ingredients: list[list[int]] = []
 for line in lines:
@ -52,5 +49,9 @@ class Solver(BaseSolver):
                )
            )

-        yield max(scores)
-        yield max(score for score, calory in zip(scores, calories) if calory == 500)
+
+answer_1 = max(scores)
+print(f"answer 1 is {answer_1}")
+
+answer_2 = max(score for score, calory in zip(scores, calories) if calory == 500)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day16.py
+++ b/src/holt59/aoc/2015/day16.py
@ -1,9 +1,8 @@
 import operator as op
 import re
+import sys
 from collections import defaultdict
-from typing import Any, Callable, Iterator
-
-from ..base import BaseSolver
+from typing import Callable

 MFCSAM: dict[str, int] = {
    "children": 3,
@ -18,10 +17,18 @@ MFCSAM: dict[str, int] = {
    "perfumes": 1,
 }

+lines = sys.stdin.readlines()

-def match(
-    aunts: list[dict[str, int]], operators: dict[str, Callable[[int, int], bool]]
-) -> int:
+aunts: list[dict[str, int]] = [
+    {
+        match[1]: int(match[2])
+        for match in re.findall(R"((?P<compound>[^:, ]+): (?P<quantity>\d+))", line)
+    }
+    for line in lines
+]
+
+
+def match(operators: dict[str, Callable[[int, int], bool]]) -> int:
    return next(
        i
        for i, aunt in enumerate(aunts, start=1)
@ -29,29 +36,16 @@ def match(
    )


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+answer_1 = match(defaultdict(lambda: op.eq))
+print(f"answer 1 is {answer_1}")

-        aunts: list[dict[str, int]] = [
-            {
-                match[1]: int(match[2])
-                for match in re.findall(
-                    R"((?P<compound>[^:, ]+): (?P<quantity>\d+))", line
-                )
-            }
-            for line in lines
-        ]
-
-        yield match(aunts, defaultdict(lambda: op.eq))
-
-        yield match(
-            aunts,
+answer_2 = match(
    defaultdict(
        lambda: op.eq,
        trees=op.gt,
        cats=op.gt,
        pomeranians=op.lt,
        goldfish=op.lt,
-            ),
    )
+)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day17.py
+++ b/src/holt59/aoc/2015/day17.py
@ -1,6 +1,5 @@
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys
+from typing import Iterator


 def iter_combinations(value: int, containers: list[int]) -> Iterator[tuple[int, ...]]:
@ -17,18 +16,15 @@ def iter_combinations(value: int, containers: list[int]) -> Iterator[tuple[int,
            yield (containers[i],) + combination


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        containers = [int(c) for c in input.split()]
+containers = [int(c) for c in sys.stdin.read().split()]
 total = 25 if len(containers) <= 5 else 150

-        combinations = [
-            combination for combination in iter_combinations(total, containers)
-        ]
+combinations = [combination for combination in iter_combinations(total, containers)]

-        yield len(combinations)
+answer_1 = len(combinations)
+print(f"answer 1 is {answer_1}")

 min_containers = min(len(combination) for combination in combinations)
-        yield sum(
-            1 for combination in combinations if len(combination) == min_containers
-        )
+
+answer_2 = sum(1 for combination in combinations if len(combination) == min_containers)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day18.py
+++ b/src/holt59/aoc/2015/day18.py
@ -1,15 +1,10 @@
 import itertools
-from typing import Any, Iterator
+import sys

 import numpy as np
 from numpy.typing import NDArray

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        grid0 = np.array([[c == "#" for c in line] for line in input.splitlines()])
+grid0 = np.array([[c == "#" for c in line] for line in sys.stdin.read().splitlines()])

 # add an always off circle around
 grid0 = np.concatenate(
@ -39,6 +34,7 @@ class Solver(BaseSolver):
 ins = iis[:, None] + np.array(moves)[:, 0]
 jns = jjs[:, None] + np.array(moves)[:, 1]

+
 def game_of_life(grid: NDArray[np.bool_]) -> NDArray[np.bool_]:
    neighbors_on = grid[ins, jns].sum(axis=1)
    cells_on = grid[iis, jjs]
@ -48,12 +44,15 @@ class Solver(BaseSolver):

    return grid

+
 grid = grid0
 n_steps = 4 if len(grid) < 10 else 100
 for _ in range(n_steps):
    grid = game_of_life(grid)

-        yield grid.sum()
+answer_1 = grid.sum()
+print(f"answer 1 is {answer_1}")
+

 n_steps = 5 if len(grid) < 10 else 100
 grid = grid0
@ -63,4 +62,5 @@ class Solver(BaseSolver):

 grid[[1, 1, -2, -2], [1, -2, 1, -2]] = True

-        yield sum(cell for line in grid for cell in line)
+answer_2 = sum(cell for line in grid for cell in line)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day19.py
+++ b/src/holt59/aoc/2015/day19.py
@ -1,12 +1,7 @@
+import sys
 from collections import defaultdict
-from typing import Any, Iterator

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        replacements_s, molecule = input.split("\n\n")
+replacements_s, molecule = sys.stdin.read().split("\n\n")

 REPLACEMENTS: dict[str, list[str]] = defaultdict(list)
 for replacement_s in replacements_s.splitlines():
@ -22,7 +17,8 @@ class Solver(BaseSolver):
    if molecule[i:].startswith(symbol)
 ]

-        yield len(set(generated))
+answer_1 = len(set(generated))
+print(f"answer 1 is {answer_1}")

 inversion: dict[str, str] = {
    replacement: symbol
@ -52,6 +48,9 @@ class Solver(BaseSolver):
            m2 += molecule[i]
            i += 1

+    # print(m2)
    molecule = m2

-        yield count
+
+answer_2 = count
+print(f"answer 2 is {count}")
--- a/src/holt59/aoc/2015/day2.py
+++ b/src/holt59/aoc/2015/day2.py
@ -1,24 +1,20 @@
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 length, width, height = np.array(
-            [[int(c) for c in line.split("x")] for line in input.splitlines()]
+    [[int(c) for c in line.split("x")] for line in lines]
 ).T

 lw, wh, hl = (length * width, width * height, height * length)

-        yield np.sum(2 * (lw + wh + hl) + np.min(np.stack([lw, wh, hl]), axis=0))
+answer_1 = np.sum(2 * (lw + wh + hl) + np.min(np.stack([lw, wh, hl]), axis=0))
+print(f"answer 1 is {answer_1}")

-        yield np.sum(
+answer_2 = np.sum(
    length * width * height
-            + 2
-            * np.min(
-                np.stack([length + width, length + height, height + width]), axis=0
-            )
+    + 2 * np.min(np.stack([length + width, length + height, height + width]), axis=0)
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day20.py
+++ b/src/holt59/aoc/2015/day20.py
@ -1,10 +1,10 @@
 import itertools
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+target = int(sys.stdin.read())


-def presents(n: int, elf: int, max: int) -> int:
+def presents(n: int, elf: int, max: int = target) -> int:
    count = 0
    k = 1
    while k * k < n:
@ -21,9 +21,8 @@ def presents(n: int, elf: int, max: int) -> int:
    return count


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        target = int(input)
+answer_1 = next(n for n in itertools.count(1) if presents(n, 10) >= target)
+print(f"answer 1 is {answer_1}")

-        yield next(n for n in itertools.count(1) if presents(n, 10, target) >= target)
-        yield next(n for n in itertools.count(1) if presents(n, 11, 50) >= target)
+answer_2 = next(n for n in itertools.count(1) if presents(n, 11, 50) >= target)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day21.py
+++ b/src/holt59/aoc/2015/day21.py
@ -1,8 +1,7 @@
 import itertools
+import sys
 from math import ceil
-from typing import Any, Iterator, TypeAlias
-
-from ..base import BaseSolver
+from typing import TypeAlias

 Modifier: TypeAlias = tuple[str, int, int, int]

@ -34,9 +33,7 @@ RINGS: list[Modifier] = [
 ]


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 player_hp = 100

@ -44,6 +41,7 @@ class Solver(BaseSolver):
 boss_armor = int(lines[2].split(":")[1].strip())
 boss_hp = int(lines[0].split(":")[1].strip())

+
 min_cost, max_cost = 1_000_000, 0
 for equipments in itertools.product(WEAPONS, ARMORS, RINGS, RINGS):
    if equipments[-1][0] != "" and equipments[-2] == equipments[-1]:
@ -60,5 +58,9 @@ class Solver(BaseSolver):
    else:
        max_cost = max(cost, max_cost)

-        yield min_cost
-        yield max_cost
+
+answer_1 = min_cost
+print(f"answer 1 is {answer_1}")
+
+answer_2 = max_cost
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day22.py
+++ b/src/holt59/aoc/2015/day22.py
@ -1,9 +1,8 @@
 from __future__ import annotations

 import heapq
-from typing import Any, Iterator, Literal, TypeAlias, cast
-
-from ..base import BaseSolver
+import sys
+from typing import Literal, TypeAlias, cast

 PlayerType: TypeAlias = Literal["player", "boss"]
 SpellType: TypeAlias = Literal["magic missile", "drain", "shield", "poison", "recharge"]
@ -63,6 +62,17 @@ def play(
            continue

        visited.add((player, player_hp, player_mana, player_armor, boss_hp, buffs))
+
+        if hard_mode and player == "player":
+            player_hp = max(0, player_hp - 1)
+
+        if player_hp == 0:
+            continue
+
+        if boss_hp == 0:
+            winning_node = spells
+            continue
+
        new_buffs: list[tuple[BuffType, int]] = []
        for buff, length in buffs:
            length = length - 1
@ -78,16 +88,6 @@ def play(
            if length > 0:
                new_buffs.append((buff, length))

-        if hard_mode and player == "player":
-            player_hp = player_hp - 1
-
-        if player_hp <= 0:
-            continue
-
-        if boss_hp <= 0:
-            winning_node = spells
-            continue
-
        buffs = tuple(new_buffs)

        if player == "boss":
@ -155,9 +155,7 @@ def play(
    return winning_node


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 player_hp = 50
 player_mana = 500
@ -166,16 +164,14 @@ class Solver(BaseSolver):
 boss_hp = int(lines[0].split(":")[1].strip())
 boss_attack = int(lines[1].split(":")[1].strip())

-        yield sum(
+answer_1 = sum(
    c
-            for _, c in play(
-                player_hp, player_mana, player_armor, boss_hp, boss_attack, False
-            )
+    for _, c in play(player_hp, player_mana, player_armor, boss_hp, boss_attack, False)
 )
+print(f"answer 1 is {answer_1}")

-        yield sum(
-            c
-            for _, c in play(
-                player_hp, player_mana, player_armor, boss_hp, boss_attack, True
-            )
+# 1242 (not working)
+answer_2 = sum(
+    c for _, c in play(player_hp, player_mana, player_armor, boss_hp, boss_attack, True)
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day23.py
+++ b/src/holt59/aoc/2015/day23.py
@ -1,107 +0,0 @@
-import inspect
-from typing import Any, Callable, Final, Iterator, Mapping
-
-from ..base import BaseSolver
-
-
-class Instruction:
-    def __init__(self, fn: Callable[..., None]):
-        self._fn = fn
-
-        args = inspect.getfullargspec(fn)
-
-        self._argtypes = [args.annotations[arg] for arg in args.args[1:]]
-
-    def __call__(self, args: tuple[str, ...]):
-        self._fn(
-            *(argtype(arg) for arg, argtype in zip(args, self._argtypes, strict=True))
-        )
-
-
-class Machine:
-    def __init__(
-        self, instructions: list[str], registers: dict[str, int] = {"a": 0, "b": 1}
-    ):
-        self.instructions: Final = [
-            (part[0], tuple(arg.strip() for arg in " ".join(part[1:]).split(",")))
-            for instruction in instructions
-            if (part := instruction.split())
-        ]
-
-        self._fns = {
-            name: Instruction(getattr(self, name))
-            for name in ("hlf", "tpl", "inc", "jmp", "jie", "jio")
-        }
-
-        self._registers = registers.copy()
-        self._ip = 0
-
-    @property
-    def registers(self) -> Mapping[str, int]:
-        return self._registers
-
-    @property
-    def ip(self) -> int:
-        return self._ip
-
-    def reset(self, registers: dict[str, int] = {"a": 0, "b": 0}):
-        self._registers = registers.copy()
-        self._ip = 0
-
-    def hlf(self, register: str):
-        self._registers[register] //= 2
-        self._ip += 1
-
-    def tpl(self, register: str):
-        self._registers[register] *= 3
-        self._ip += 1
-
-    def inc(self, register: str):
-        self._registers[register] += 1
-        self._ip += 1
-
-    def jmp(self, offset: int):
-        self._ip += offset
-        assert 0 <= self._ip < len(self.instructions)
-
-    def jie(self, register: str, offset: int):
-        if self._registers[register] % 2 == 0:
-            self._ip += offset
-        else:
-            self._ip += 1
-
-    def jio(self, register: str, offset: int):
-        if self._registers[register] == 1:
-            self._ip += offset
-        else:
-            self._ip += 1
-
-    def _exec(self) -> bool:
-        # execute next instruction
-        if self._ip >= len(self.instructions):
-            return False
-
-        ins, args = self.instructions[self._ip]
-
-        if ins not in self._fns:
-            return False
-
-        self._fns[ins](args)
-        return True
-
-    def run(self):
-        while self._exec():
-            ...
-        return self.registers
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        machine = Machine(input.splitlines())
-
-        registers = machine.run()
-        yield registers["b"]
-
-        machine.reset({"a": 1, "b": 0})
-        registers = machine.run()
-        yield registers["b"]
--- a/src/holt59/aoc/2015/day24.py
+++ b/src/holt59/aoc/2015/day24.py
@ -1,88 +0,0 @@
-from typing import Any, Iterator, TypeAlias
-
-from ..base import BaseSolver
-
-TupleOfInts: TypeAlias = tuple[int, ...]
-
-
-def check_n_groups(
-    target: int, groups: tuple[TupleOfInts, ...], numbers: TupleOfInts
-) -> bool:
-    n_groups = len(groups)
-    groups_s = tuple(sum(group) for group in groups)
-
-    if all(target == group_s for group_s in groups_s):
-        return not numbers
-
-    if not numbers:
-        return False
-
-    head, *tail_l = numbers
-    tail, tail_s = tuple(tail_l), sum(tail_l)
-
-    return any(
-        groups_s[i] + head <= target
-        and sum(groups_s[j] for j in range(len(groups)) if i != j) + tail_s
-        >= (n_groups - 1) * target
-        and check_n_groups(
-            target, groups[:i] + ((groups[i] + (head,)),) + groups[i + 1 :], tail
-        )
-        for i in range(len(groups))
-    )
-
-
-def enumerate_single_subset(
-    target: int, numbers: TupleOfInts
-) -> Iterator[tuple[int, TupleOfInts, TupleOfInts]]:
-    """
-    Enumerate subset of numbers whose sum equals target.
-
-    Subset are enumerated in increasing order of length, then product (quantum value).
-
-    Args:
-        target: Target for the sum of the subset.
-        numbers: Tuple of integers to find the subset from.
-
-    Returns:
-        A generator (quantum, subset, remaining) where subset if the subset of numbers
-        whose sum equals target, quantum the product of the subset, and remaining the
-        remaining numbers.
-    """
-    groups: list[tuple[int, TupleOfInts, TupleOfInts]] = [(1, (), numbers)]
-
-    for _ in range(len(numbers)):
-        new_groups: list[tuple[int, TupleOfInts, TupleOfInts]] = []
-
-        for g_quantum, group, remaining in groups:
-            sg = sum(group)
-            for i in range(len(remaining)):
-                if group and remaining[i] <= group[-1]:
-                    continue
-
-                uv = remaining[:i] + remaining[i + 1 :]
-                kv = g_quantum * remaining[i], group + (remaining[i],), uv
-
-                if sg + remaining[i] == target:
-                    yield kv
-                elif sg + remaining[i] < target:
-                    new_groups.append(kv)
-
-        groups = new_groups
-
-
-def find_min_quantum(numbers: tuple[int, ...], n_groups: int):
-    return next(
-        g_quantum
-        for g_quantum, group_1v2, group_234v2 in enumerate_single_subset(
-            sum(numbers) // n_groups, numbers
-        )
-        if check_n_groups(sum(group_1v2), ((),) * (n_groups - 1), group_234v2)
-    )
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        numbers = tuple(map(int, input.split()))
-
-        yield find_min_quantum(numbers, 3)
-        yield find_min_quantum(numbers, 4)
--- a/src/holt59/aoc/2015/day25.py
+++ b/src/holt59/aoc/2015/day25.py
@ -1,16 +0,0 @@
-import re
-from typing import Any, Iterator
-
-from ..base import BaseSolver
-from ..tools.math import pow_mod
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        m = re.search(r"row\s*([0-9]+)\s*,\s*column\s*([0-9]+)", input)
-        assert m is not None
-
-        row, col = int(m.group(1)), int(m.group(2))
-        n = (row * (row - 1)) // 2 + col * (col + 1) // 2 + (row - 1) * (col - 1)
-
-        yield (20151125 * pow_mod(252533, n - 1, 33554393)) % 33554393
--- a/src/holt59/aoc/2015/day3.py
+++ b/src/holt59/aoc/2015/day3.py
@ -1,7 +1,7 @@
+import sys
 from collections import defaultdict
-from typing import Any, Iterator

-from ..base import BaseSolver
+line = sys.stdin.read().strip()


 def process(directions: str) -> dict[tuple[int, int], int]:
@ -27,7 +27,8 @@ def process(directions: str) -> dict[tuple[int, int], int]:
    return counts


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        yield len(process(input))
-        yield len(process(input[::2]) | process(input[1::2]))
+answer_1 = len(process(line))
+print(f"answer 1 is {answer_1}")
+
+answer_2 = len(process(line[::2]) | process(line[1::2]))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day4.py
+++ b/src/holt59/aoc/2015/day4.py
@ -1,20 +1,16 @@
 import hashlib
 import itertools
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+line = sys.stdin.read().strip()

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 it = iter(itertools.count(1))
-        yield next(
-            i
-            for i in it
-            if hashlib.md5(f"{input}{i}".encode()).hexdigest().startswith("00000")
+answer_1 = next(
+    i for i in it if hashlib.md5(f"{line}{i}".encode()).hexdigest().startswith("00000")
 )
-        yield next(
-            i
-            for i in it
-            if hashlib.md5(f"{input}{i}".encode()).hexdigest().startswith("000000")
+print(f"answer 1 is {answer_1}")
+
+answer_2 = next(
+    i for i in it if hashlib.md5(f"{line}{i}".encode()).hexdigest().startswith("000000")
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day5.py
+++ b/src/holt59/aoc/2015/day5.py
@ -1,6 +1,4 @@
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys

 VOWELS = "aeiou"
 FORBIDDEN = {"ab", "cd", "pq", "xy"}
@ -29,8 +27,10 @@ def is_nice_2(s: str) -> bool:
    return True


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
-        yield sum(map(is_nice_1, lines))
-        yield sum(map(is_nice_2, lines))
+lines = sys.stdin.read().splitlines()
+
+answer_1 = sum(map(is_nice_1, lines))
+print(f"answer 1 is {answer_1}")
+
+answer_2 = sum(map(is_nice_2, lines))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day6.py
+++ b/src/holt59/aoc/2015/day6.py
@ -1,16 +1,14 @@
-from typing import Any, Iterator, Literal, cast
+import sys
+from typing import Literal, cast

 import numpy as np
 import parse  # type: ignore

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 lights_1 = np.zeros((1000, 1000), dtype=bool)
 lights_2 = np.zeros((1000, 1000), dtype=int)
-        for line in input.splitlines():
+for line in lines:
    action, sx, sy, ex, ey = cast(
        tuple[Literal["turn on", "turn off", "toggle"], int, int, int, int],
        parse.parse("{} {:d},{:d} through {:d},{:d}", line),  # type: ignore
@ -28,5 +26,8 @@ class Solver(BaseSolver):
            lights_1[sx:ex, sy:ey] = ~lights_1[sx:ex, sy:ey]
            lights_2[sx:ex, sy:ey] += 2

-        yield lights_1.sum()
-        yield lights_2.sum()
+answer_1 = lights_1.sum()
+print(f"answer 1 is {answer_1}")
+
+answer_2 = lights_2.sum()
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day7.py
+++ b/src/holt59/aoc/2015/day7.py
@ -1,7 +1,11 @@
+import logging
 import operator
-from typing import Any, Callable, Iterator
+import os
+import sys
+from typing import Callable

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)

 OPERATORS = {
    "AND": operator.and_,
@ -32,22 +36,7 @@ def value_of(key: str) -> tuple[str, Callable[[dict[str, int]], int]]:
        return key, lambda values: values[key]


-def process(
-    signals: Signals,
-    values: dict[str, int],
-) -> dict[str, int]:
-    while signals:
-        signal = next(s for s in signals if all(p in values for p in signals[s][0]))
-        _, deps, command = signals[signal]
-        values[signal] = command(deps[0](values), deps[1](values)) % 65536
-        del signals[signal]
-
-    return values
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any] | None:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 signals: Signals = {}
 values: dict[str, int] = {"": 0}
@ -88,9 +77,25 @@ class Solver(BaseSolver):

        signals[signal] = ((lhs_s, rhs_s), (lhs_fn, rhs_fn), op)

-        values_1 = process(signals.copy(), values.copy())
-        for k in sorted(values_1):
-            self.logger.info(f"{k}: {values_1[k]}")
-        yield values_1["a"]

-        yield process(signals.copy(), values | {"b": values_1["a"]})["a"]
+def process(
+    signals: Signals,
+    values: dict[str, int],
+) -> dict[str, int]:
+    while signals:
+        signal = next(s for s in signals if all(p in values for p in signals[s][0]))
+        _, deps, command = signals[signal]
+        values[signal] = command(deps[0](values), deps[1](values)) % 65536
+        del signals[signal]
+
+    return values
+
+
+values_1 = process(signals.copy(), values.copy())
+logging.info("\n" + "\n".join(f"{k}: {values_1[k]}" for k in sorted(values_1)))
+answer_1 = values_1["a"]
+print(f"answer 1 is {answer_1}")
+
+values_2 = process(signals.copy(), values | {"b": values_1["a"]})
+answer_2 = values_2["a"]
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day8.py
+++ b/src/holt59/aoc/2015/day8.py
@ -1,13 +1,14 @@
-from typing import Any, Iterator
+import logging
+import os
+import sys

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

-        yield sum(
+answer_1 = sum(
    # left and right quotes (not in memory)
    2
    # each \\ adds one character in the literals (compared to memory)
@ -20,8 +21,9 @@ class Solver(BaseSolver):
    + 3 * (line.count(R"\x") - line.count(R"\\x") + line.count(R"\\\x"))
    for line in lines
 )
+print(f"answer 1 is {answer_1}")

-        yield sum(
+answer_2 = sum(
    # needs to wrap in quotes (2 characters)
    2
    # needs to escape every \ with an extra \
@ -30,3 +32,4 @@ class Solver(BaseSolver):
    + line.count('"')
    for line in lines
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2015/day9.py
+++ b/src/holt59/aoc/2015/day9.py
@ -1,15 +1,11 @@
 import itertools
+import sys
 from collections import defaultdict
-from typing import Any, Iterator, cast
+from typing import cast

 import parse  # type: ignore

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 distances: dict[str, dict[str, int]] = defaultdict(dict)
 for line in lines:
@ -24,5 +20,8 @@ class Solver(BaseSolver):
    for route in map(tuple, itertools.permutations(distances))
 }

-        yield min(distance_of_routes.values())
-        yield max(distance_of_routes.values())
+answer_1 = min(distance_of_routes.values())
+print(f"answer 1 is {answer_1}")
+
+answer_2 = max(distance_of_routes.values())
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day1.py
+++ b/src/holt59/aoc/2021/day1.py
@ -1,17 +1,14 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 values = [int(line) for line in lines]

 # part 1
-        yield sum(v2 > v1 for v1, v2 in zip(values[:-1], values[1:]))
+answer_1 = sum(v2 > v1 for v1, v2 in zip(values[:-1], values[1:]))
+print(f"answer 1 is {answer_1}")

 # part 2
 runnings = [sum(values[i : i + 3]) for i in range(len(values) - 2)]
-        yield sum(v2 > v1 for v1, v2 in zip(runnings[:-1], runnings[1:]))
+answer_2 = sum(v2 > v1 for v1, v2 in zip(runnings[:-1], runnings[1:]))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day10.py
+++ b/src/holt59/aoc/2021/day10.py
@ -1,47 +1,11 @@
-from functools import reduce
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

-BRACKETS = {"{": "}", "[": "]", "<": ">", "(": ")"}
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-CORRUPT_SCORES = {")": 3, "]": 57, "}": 1197, ">": 25137}
-COMPLETE_SCORES = {")": 1, "]": 2, "}": 3, ">": 4}
-
-
-def corrupted_or_incomplete(line: str) -> tuple[bool, str]:
-    opens: list[str] = []
-
-    for c in line:
-        if c in BRACKETS:
-            opens.append(c)
-        elif BRACKETS[opens[-1]] != c:
-            return True, c
-        else:
-            opens.pop()
-
-    return (False, "".join(opens))
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
-
-        answer_1: int = 0
-        incomplete_scores: list[int] = []
-
-        for line in lines:
-            c, r = corrupted_or_incomplete(line)
-            if c:
-                answer_1 += CORRUPT_SCORES[r]
-            else:
-                incomplete_scores.append(
-                    reduce(
-                        lambda s, c: s * 5 + COMPLETE_SCORES[BRACKETS[c]],
-                        reversed(r),
-                        0,
-                    ),
-                )
-
-        yield answer_1
-        yield sorted(incomplete_scores)[len(incomplete_scores) // 2]
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day11.py
+++ b/src/holt59/aoc/2021/day11.py
@ -1,66 +1,11 @@
-import itertools as it
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-def do_step(values: list[list[int]]) -> tuple[list[list[int]], set[tuple[int, int]]]:
-    values = [[c + 1 for c in r] for r in values]
-    flashed: set[tuple[int, int]] = set()
-
-    while True:
-        found = False
-
-        for i_row, row in enumerate(values):
-            for i_col, col in enumerate(row):
-                if col <= 9 or (i_row, i_col) in flashed:
-                    continue
-
-                found = True
-                flashed.add((i_row, i_col))
-                for dr, dc in it.product((-1, 0, 1), repeat=2):
-                    if 0 <= i_row + dr < len(values) and 0 <= i_col + dc < len(
-                        values[0]
-                    ):
-                        values[i_row + dr][i_col + dc] += 1
-
-        if not found:
-            break
-
-    for i, j in flashed:
-        values[i][j] = 0
-
-    return values, flashed
-
-
-class Solver(BaseSolver):
-    def print_grid(self, values: list[list[int]], flashed: set[tuple[int, int]]):
-        for i_row, row in enumerate(values):
-            s_row = ""
-            for i_col, col in enumerate(row):
-                if (i_row, i_col) in flashed:
-                    s_row += f"\033[0;31m{col}\033[0;00m"
-                else:
-                    s_row += str(col)
-            self.logger.info(s_row)
-        self.logger.info("")
-
-    def solve(self, input: str) -> Iterator[Any]:
-        values_0 = [[int(c) for c in r] for r in input.splitlines()]
-
-        values = values_0
-        total_flashed: int = 0
-        for _ in range(100):
-            values, flashed = do_step(values)
-            total_flashed += len(flashed)
-
-        yield total_flashed
-
-        n_cells = len(values) * len(values[0])
-        flashed: set[tuple[int, int]] = set()
-        values, step = values_0, 0
-        while len(flashed) != n_cells:
-            values, flashed = do_step(values)
-            step += 1
-
-        yield step
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day12.py
+++ b/src/holt59/aoc/2021/day12.py
@ -1,64 +1,11 @@
-import string
-from collections import defaultdict
-from functools import cache
-from typing import Any, Iterator, Mapping, Sequence
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-@cache
-def is_small(node: str):
-    return all(c in string.ascii_lowercase for c in node)
-
-
-def enumerate_paths(
-    neighbors: Mapping[str, Sequence[str]],
-    duplicate_smalls: int = 0,
-    start: str = "start",
-    current: tuple[str, ...] = ("start",),
-) -> Iterator[tuple[str, ...]]:
-    if start == "end":
-        yield current
-
-    for neighbor in neighbors[start]:
-        if not is_small(neighbor):
-            yield from enumerate_paths(
-                neighbors, duplicate_smalls, neighbor, current + (neighbor,)
-            )
-        elif neighbor not in current:
-            yield from enumerate_paths(
-                neighbors, duplicate_smalls, neighbor, current + (neighbor,)
-            )
-        elif duplicate_smalls > 0:
-            yield from enumerate_paths(
-                neighbors, duplicate_smalls - 1, neighbor, current + (neighbor,)
-            )
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        neighbors: dict[str, list[str]] = defaultdict(list)
-
-        for row in input.splitlines():
-            a, b = row.split("-")
-            if a != "end" and b != "start":
-                neighbors[a].append(b)
-            if b != "end" and a != "start":
-                neighbors[b].append(a)
-
-        if self.files:
-            graph = "graph {\n"
-            for node, neighbors_of in neighbors.items():
-                graph += (
-                    " ".join(
-                        f"{node} -- {neighbor};"
-                        for neighbor in neighbors_of
-                        if node <= neighbor or node == "start" or neighbor == "end"
-                    )
-                    + "\n"
-                )
-            graph += "}\n"
-            self.files.create("graph.dot", graph.encode(), False)
-
-        yield len(list(enumerate_paths(neighbors)))
-        yield len(list(enumerate_paths(neighbors, 1)))
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day13.py
+++ b/src/holt59/aoc/2021/day13.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day14.py
+++ b/src/holt59/aoc/2021/day14.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day15.py
+++ b/src/holt59/aoc/2021/day15.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day16.py
+++ b/src/holt59/aoc/2021/day16.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day17.py
+++ b/src/holt59/aoc/2021/day17.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day18.py
+++ b/src/holt59/aoc/2021/day18.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day19.py
+++ b/src/holt59/aoc/2021/day19.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day2.py
+++ b/src/holt59/aoc/2021/day2.py
@ -1,19 +1,16 @@
+import sys
 from math import prod
-from typing import Any, Iterator, Literal, TypeAlias, cast
+from typing import Literal, TypeAlias, cast

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

 Command: TypeAlias = Literal["forward", "up", "down"]

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
-
 commands: list[tuple[Command, int]] = [
    (cast(Command, (p := line.split())[0]), int(p[1])) for line in lines
 ]

+
 def depth_and_position(use_aim: bool):
    aim, pos, depth = 0, 0, 0
    for command, value in commands:
@ -34,5 +31,11 @@ class Solver(BaseSolver):

    return depth, pos

-        yield prod(depth_and_position(False))
-        yield prod(depth_and_position(True))
+
+# part 1
+answer_1 = prod(depth_and_position(False))
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = prod(depth_and_position(True))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day20.py
+++ b/src/holt59/aoc/2021/day20.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day21.py
+++ b/src/holt59/aoc/2021/day21.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day22.py
+++ b/src/holt59/aoc/2021/day22.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day23.py
+++ b/src/holt59/aoc/2021/day23.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day24.py
+++ b/src/holt59/aoc/2021/day24.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day25.py
+++ b/src/holt59/aoc/2021/day25.py
@ -1,7 +1,11 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day3.py
+++ b/src/holt59/aoc/2021/day3.py
@ -1,7 +1,6 @@
+import sys
 from collections import Counter
-from typing import Any, Iterator, Literal
-
-from ..base import BaseSolver
+from typing import Literal


 def generator_rating(
@ -21,23 +20,20 @@ def generator_rating(
    return values[0]


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()
+

 # part 1
 most_and_least_common = [
-            tuple(
-                Counter(line[col] for line in lines).most_common(2)[m][0]
-                for m in range(2)
-            )
+    tuple(Counter(line[col] for line in lines).most_common(2)[m][0] for m in range(2))
    for col in range(len(lines[0]))
 ]
 gamma_rate = int("".join(most for most, _ in most_and_least_common), base=2)
 epsilon_rate = int("".join(least for _, least in most_and_least_common), base=2)
-        yield gamma_rate * epsilon_rate
+print(f"answer 1 is {gamma_rate * epsilon_rate}")

 # part 2
 oxygen_generator_rating = int(generator_rating(lines, True, "1"), base=2)
 co2_scrubber_rating = int(generator_rating(lines, False, "0"), base=2)
-        yield oxygen_generator_rating * co2_scrubber_rating
+answer_2 = oxygen_generator_rating * co2_scrubber_rating
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day4.py
+++ b/src/holt59/aoc/2021/day4.py
@ -1,13 +1,8 @@
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 numbers = [int(c) for c in lines[0].split(",")]

@ -31,9 +26,7 @@ class Solver(BaseSolver):
        if winning_rounds[index][0] > 0:
            continue

-                if np.any(
-                    np.all(marked[index], axis=0) | np.all(marked[index], axis=1)
-                ):
+        if np.any(np.all(marked[index], axis=0) | np.all(marked[index], axis=1)):
            winning_rounds[index] = (
                round,
                number * int(np.sum(boards[index][~marked[index]])),
@ -45,8 +38,8 @@ class Solver(BaseSolver):

 # part 1
 (_, score) = min(winning_rounds, key=lambda w: w[0])
-        yield score
+print(f"answer 1 is {score}")

 # part 2
 (_, score) = max(winning_rounds, key=lambda w: w[0])
-        yield score
+print(f"answer 2 is {score}")
--- a/src/holt59/aoc/2021/day5.py
+++ b/src/holt59/aoc/2021/day5.py
@ -1,13 +1,8 @@
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines: list[str] = sys.stdin.read().splitlines()

 sections: list[tuple[tuple[int, int], tuple[int, int]]] = [
    (
@ -25,8 +20,10 @@ class Solver(BaseSolver):

 np_sections = np.array(sections).reshape(-1, 4)

-        x_max, y_max = (
+x_min, x_max, y_min, y_max = (
+    min(np_sections[:, 0].min(), np_sections[:, 2].min()),
    max(np_sections[:, 0].max(), np_sections[:, 2].max()),
+    min(np_sections[:, 1].min(), np_sections[:, 3].min()),
    max(np_sections[:, 1].max(), np_sections[:, 3].max()),
 )

@ -44,5 +41,8 @@ class Solver(BaseSolver):
        for i, j in zip(y_rng, x_rng):
            counts_2[i, j] += 1

-        yield (counts_1 >= 2).sum()
-        yield (counts_2 >= 2).sum()
+answer_1 = (counts_1 >= 2).sum()
+print(f"answer 1 is {answer_1}")
+
+answer_2 = (counts_2 >= 2).sum()
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day6.py
+++ b/src/holt59/aoc/2021/day6.py
@ -1,11 +1,6 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        values = [int(c) for c in input.split(",")]
+values = [int(c) for c in sys.stdin.read().strip().split(",")]

 days = 256
 lanterns = {day: 0 for day in range(days)}
@ -17,5 +12,10 @@ class Solver(BaseSolver):
    for day2 in range(day + 9, days, 7):
        lanterns[day2] += lanterns[day]

-        yield sum(v for k, v in lanterns.items() if k < 80) + len(values)
-        yield sum(lanterns.values()) + len(values)
+# part 1
+answer_1 = sum(v for k, v in lanterns.items() if k < 80) + len(values)
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = sum(lanterns.values()) + len(values)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day7.py
+++ b/src/holt59/aoc/2021/day7.py
@ -1,22 +1,19 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        positions = [int(c) for c in input.split(",")]
+positions = [int(c) for c in sys.stdin.read().strip().split(",")]

 min_position, max_position = min(positions), max(positions)

 # part 1
-        yield min(
+answer_1 = min(
    sum(abs(p - position) for p in positions)
    for position in range(min_position, max_position + 1)
 )
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield min(
+answer_2 = min(
    sum(abs(p - position) * (abs(p - position) + 1) // 2 for p in positions)
    for position in range(min_position, max_position + 1)
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day8.py
+++ b/src/holt59/aoc/2021/day8.py
@ -1,7 +1,8 @@
 import itertools
-from typing import Any, Iterator
+import os
+import sys

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"

 digits = {
    "abcefg": 0,
@ -16,18 +17,14 @@ digits = {
    "abcdfg": 9,
 }

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 # part 1
 lengths = {len(k) for k, v in digits.items() if v in (1, 4, 7, 8)}
-        yield sum(
-            len(p) in lengths
-            for line in lines
-            for p in line.split("|")[1].strip().split()
+answer_1 = sum(
+    len(p) in lengths for line in lines for p in line.split("|")[1].strip().split()
 )
+print(f"answer 1 is {answer_1}")

 # part 2
 values: list[int] = []
@ -52,9 +49,7 @@ class Solver(BaseSolver):
    bd = [u for u in per_length[4][0] if u not in cf]

    # the 3 digits of length 5 have a, d and g in common
-            adg = [
-                u for u in per_length[5][0] if all(u in pe for pe in per_length[5][1:])
-            ]
+    adg = [u for u in per_length[5][0] if all(u in pe for pe in per_length[5][1:])]

    # we can remove a
    dg = [u for u in adg if u != a]
@ -82,8 +77,11 @@ class Solver(BaseSolver):
        digit = "".join(sorted(mapping[c] for c in number))
        value = 10 * value + digits[digit]

-            self.logger.info(f"value for '{line}' is {value}")
+    if VERBOSE:
+        print(value)

    values.append(value)

-        yield sum(values)
+
+answer_2 = sum(values)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2021/day9.py
+++ b/src/holt59/aoc/2021/day9.py
@ -1,18 +1,18 @@
+import sys
 from math import prod
-from typing import Any, Iterator

-from ..base import BaseSolver
+values = [[int(c) for c in row] for row in sys.stdin.read().splitlines()]
+n_rows, n_cols = len(values), len(values[0])


-def neighbors(point: tuple[int, int], n_rows: int, n_cols: int):
+def neighbors(point: tuple[int, int]):
    i, j = point
    for di, dj in ((-1, 0), (+1, 0), (0, -1), (0, +1)):
        if 0 <= i + di < n_rows and 0 <= j + dj < n_cols:
            yield (i + di, j + dj)


-def basin(values: list[list[int]], start: tuple[int, int]) -> set[tuple[int, int]]:
-    n_rows, n_cols = len(values), len(values[0])
+def basin(start: tuple[int, int]) -> set[tuple[int, int]]:
    visited: set[tuple[int, int]] = set()
    queue = [start]

@ -23,25 +23,22 @@ def basin(values: list[list[int]], start: tuple[int, int]) -> set[tuple[int, int
            continue

        visited.add((i, j))
-        queue.extend(neighbors((i, j), n_rows, n_cols))
+        queue.extend(neighbors((i, j)))

    return visited


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        values = [[int(c) for c in row] for row in input.splitlines()]
-        n_rows, n_cols = len(values), len(values[0])
-
 low_points = [
    (i, j)
    for i in range(n_rows)
    for j in range(n_cols)
-            if all(
-                values[ti][tj] > values[i][j]
-                for ti, tj in neighbors((i, j), n_rows, n_cols)
-            )
+    if all(values[ti][tj] > values[i][j] for ti, tj in neighbors((i, j)))
 ]

-        yield sum(values[i][j] + 1 for i, j in low_points)
-        yield prod(sorted(len(basin(values, point)) for point in low_points)[-3:])
+# part 1
+answer_1 = sum(values[i][j] + 1 for i, j in low_points)
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = prod(sorted(len(basin(point)) for point in low_points)[-3:])
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day1.py
+++ b/src/holt59/aoc/2022/day1.py
@ -1,12 +1,7 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        blocks = input.split("\n\n")
+blocks = sys.stdin.read().split("\n\n")
 values = sorted(sum(map(int, block.split())) for block in blocks)

-        yield values[-1]
-        yield sum(values[-3:])
+print(f"answer 1 is {values[-1]}")
+print(f"answer 2 is {sum(values[-3:])}")
--- a/src/holt59/aoc/2022/day10.py
+++ b/src/holt59/aoc/2022/day10.py
@ -1,13 +1,10 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()

+cycle = 1
+x = 1

-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
-
-        cycle, x = 1, 1
 values = {cycle: x}

 for line in lines:
@ -26,18 +23,16 @@ class Solver(BaseSolver):
    values[cycle] = x

 answer_1 = sum(c * values[c] for c in range(20, max(values.keys()) + 1, 40))
-        yield answer_1
+print(f"answer 1 is {answer_1}")

-        yield (
-            "\n"
-            + "\n".join(
-                "".join(
-                    "#"
-                    if j >= (v := values[1 + i * 40 + j]) - 1 and j <= v + 1
-                    else "."
-                    for j in range(40)
-                )
-                for i in range(6)
-            )
-            + "\n"
-        )
+
+for i in range(6):
+    for j in range(40):
+        v = values[1 + i * 40 + j]
+
+        if j >= v - 1 and j <= v + 1:
+            print("#", end="")
+        else:
+            print(".", end="")
+
+    print()
--- a/src/holt59/aoc/2022/day11.py
+++ b/src/holt59/aoc/2022/day11.py
@ -1,8 +1,7 @@
 import copy
+import sys
 from functools import reduce
-from typing import Any, Callable, Final, Iterator, Mapping, Sequence
-
-from ..base import BaseSolver
+from typing import Callable, Final, Mapping, Sequence


 class Monkey:
@ -120,14 +119,13 @@ def monkey_business(inspects: dict[Monkey, int]) -> int:
    return sorted_levels[-2] * sorted_levels[-1]


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        monkeys = [parse_monkey(block.splitlines()) for block in input.split("\n\n")]
+monkeys = [parse_monkey(block.splitlines()) for block in sys.stdin.read().split("\n\n")]

 # case 1: we simply divide the worry by 3 after applying the monkey worry operation
-        yield monkey_business(
+answer_1 = monkey_business(
    run(copy.deepcopy(monkeys), 20, me_worry_fn=lambda w: w // 3)
 )
+print(f"answer 1 is {answer_1}")

 # case 2: to keep reasonable level values, we can use a modulo operation, we need to
 # use the product of all "divisible by" test so that the test remains valid
@ -138,10 +136,7 @@ class Solver(BaseSolver):
 # we use the product of all test value
 #
 total_test_value = reduce(lambda w, m: w * m.test_value, monkeys, 1)
-        yield monkey_business(
-            run(
-                copy.deepcopy(monkeys),
-                10_000,
-                me_worry_fn=lambda w: w % total_test_value,
-            )
+answer_2 = monkey_business(
+    run(copy.deepcopy(monkeys), 10_000, me_worry_fn=lambda w: w % total_test_value)
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day12.py
+++ b/src/holt59/aoc/2022/day12.py
@ -1,7 +1,6 @@
 import heapq
-from typing import Any, Callable, Iterator, TypeVar
-
-from ..base import BaseSolver
+import sys
+from typing import Callable, Iterator, TypeVar

 Node = TypeVar("Node")

@ -69,6 +68,30 @@ def make_path(parents: dict[Node, Node], start: Node, end: Node) -> list[Node] |
    return list(reversed(path))


+def print_path(path: list[tuple[int, int]], n_rows: int, n_cols: int) -> None:
+    end = path[-1]
+
+    graph = [["." for _c in range(n_cols)] for _r in range(n_rows)]
+    graph[end[0]][end[1]] = "E"
+
+    for i in range(0, len(path) - 1):
+        cr, cc = path[i]
+        nr, nc = path[i + 1]
+
+        if cr == nr and nc == cc - 1:
+            graph[cr][cc] = "<"
+        elif cr == nr and nc == cc + 1:
+            graph[cr][cc] = ">"
+        elif cr == nr - 1 and nc == cc:
+            graph[cr][cc] = "v"
+        elif cr == nr + 1 and nc == cc:
+            graph[cr][cc] = "^"
+        else:
+            assert False, "{} -> {} infeasible".format(path[i], path[i + 1])
+
+    print("\n".join("".join(row) for row in graph))
+
+
 def neighbors(
    grid: list[list[int]], node: tuple[int, int], up: bool
 ) -> Iterator[tuple[int, int]]:
@ -95,42 +118,7 @@ def neighbors(

 # === main code ===

-
-class Solver(BaseSolver):
-    def print_path(
-        self, name: str, path: list[tuple[int, int]], n_rows: int, n_cols: int
-    ) -> None:
-        if not self.files:
-            return
-
-        end = path[-1]
-
-        graph = [["." for _c in range(n_cols)] for _r in range(n_rows)]
-        graph[end[0]][end[1]] = "E"
-
-        for i in range(0, len(path) - 1):
-            cr, cc = path[i]
-            nr, nc = path[i + 1]
-
-            if cr == nr and nc == cc - 1:
-                graph[cr][cc] = "<"
-            elif cr == nr and nc == cc + 1:
-                graph[cr][cc] = ">"
-            elif cr == nr - 1 and nc == cc:
-                graph[cr][cc] = "v"
-            elif cr == nr + 1 and nc == cc:
-                graph[cr][cc] = "^"
-            else:
-                assert False, "{} -> {} infeasible".format(path[i], path[i + 1])
-
-        self.files.create(
-            f"graph_{name}.txt",
-            "\n".join("".join(row) for row in graph).encode(),
-            text=True,
-        )
-
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 grid = [[ord(cell) - ord("a") for cell in line] for line in lines]

@ -157,20 +145,19 @@ class Solver(BaseSolver):
 grid[start[0]][start[1]] = 0
 grid[end[0]][end[1]] = ord("z") - ord("a")

+
 lengths_1, parents_1 = dijkstra(
-            start=start,
-            neighbors=lambda n: neighbors(grid, n, True),
-            cost=lambda lhs, rhs: 1,
+    start=start, neighbors=lambda n: neighbors(grid, n, True), cost=lambda lhs, rhs: 1
 )
 path_1 = make_path(parents_1, start, end)
 assert path_1 is not None

-        self.print_path("answer1", path_1, n_rows=len(grid), n_cols=len(grid[0]))
-        yield lengths_1[end] - 1
+print_path(path_1, n_rows=len(grid), n_cols=len(grid[0]))

-        lengths_2, _ = dijkstra(
-            start=end,
-            neighbors=lambda n: neighbors(grid, n, False),
-            cost=lambda lhs, rhs: 1,
+print(f"answer 1 is {lengths_1[end] - 1}")
+
+lengths_2, parents_2 = dijkstra(
+    start=end, neighbors=lambda n: neighbors(grid, n, False), cost=lambda lhs, rhs: 1
 )
-        yield min(lengths_2.get(start, float("inf")) for start in start_s)
+answer_2 = min(lengths_2.get(start, float("inf")) for start in start_s)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day13.py
+++ b/src/holt59/aoc/2022/day13.py
@ -1,8 +1,11 @@
 import json
+import sys
 from functools import cmp_to_key
-from typing import Any, Iterator, TypeAlias, cast
+from typing import TypeAlias, cast

-from ..base import BaseSolver
+blocks = sys.stdin.read().strip().split("\n\n")
+
+pairs = [tuple(json.loads(p) for p in block.split("\n")) for block in blocks]

 Packet: TypeAlias = list[int | list["Packet"]]

@ -25,12 +28,8 @@ def compare(lhs: Packet, rhs: Packet) -> int:
    return len(rhs) - len(lhs)


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        blocks = input.split("\n\n")
-        pairs = [tuple(json.loads(p) for p in block.split("\n")) for block in blocks]
-
-        yield sum(i + 1 for i, (lhs, rhs) in enumerate(pairs) if compare(lhs, rhs) > 0)
+answer_1 = sum(i + 1 for i, (lhs, rhs) in enumerate(pairs) if compare(lhs, rhs) > 0)
+print(f"answer_1 is {answer_1}")

 dividers = [[[2]], [[6]]]

@ -39,4 +38,4 @@ class Solver(BaseSolver):
 packets = list(reversed(sorted(packets, key=cmp_to_key(compare))))

 d_index = [packets.index(d) + 1 for d in dividers]
-        yield d_index[0] * d_index[1]
+print(f"answer 2 is {d_index[0] * d_index[1]}")
--- a/src/holt59/aoc/2022/day14.py
+++ b/src/holt59/aoc/2022/day14.py
@ -1,7 +1,6 @@
+import sys
 from enum import Enum, auto
-from typing import Any, Callable, Iterator, cast
-
-from ..base import BaseSolver
+from typing import Callable, cast


 class Cell(Enum):
@ -13,6 +12,26 @@ class Cell(Enum):
        return {Cell.AIR: ".", Cell.ROCK: "#", Cell.SAND: "O"}[self]


+def print_blocks(blocks: dict[tuple[int, int], Cell]):
+    """
+    Print the given set of blocks on a grid.
+
+    Args:
+        blocks: Set of blocks to print.
+    """
+    x_min, y_min, x_max, y_max = (
+        min(x for x, _ in blocks),
+        0,
+        max(x for x, _ in blocks),
+        max(y for _, y in blocks),
+    )
+
+    for y in range(y_min, y_max + 1):
+        print(
+            "".join(str(blocks.get((x, y), Cell.AIR)) for x in range(x_min, x_max + 1))
+        )
+
+
 def flow(
    blocks: dict[tuple[int, int], Cell],
    stop_fn: Callable[[int, int], bool],
@ -65,51 +84,19 @@ def flow(

 # === inputs ===

-
-class Solver(BaseSolver):
-    def print_blocks(self, name: str, blocks: dict[tuple[int, int], Cell]):
-        """
-        Print the given set of blocks on a grid.
-
-        Args:
-            blocks: Set of blocks to print.
-        """
-        if not self.files:
-            return
-
-        x_min, y_min, x_max, y_max = (
-            min(x for x, _ in blocks),
-            0,
-            max(x for x, _ in blocks),
-            max(y for _, y in blocks),
-        )
-
-        self.files.create(
-            f"blocks_{name}.txt",
-            "\n".join(
-                "".join(
-                    str(blocks.get((x, y), Cell.AIR)) for x in range(x_min, x_max + 1)
-                )
-                for y in range(y_min, y_max + 1)
-            ).encode(),
-            True,
-        )
-
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 paths: list[list[tuple[int, int]]] = []
 for line in lines:
    parts = line.split(" -> ")
    paths.append(
        [
-                    cast(
-                        tuple[int, int], tuple(int(c.strip()) for c in part.split(","))
-                    )
+            cast(tuple[int, int], tuple(int(c.strip()) for c in part.split(",")))
            for part in parts
        ]
    )

+
 blocks: dict[tuple[int, int], Cell] = {}
 for path in paths:
    for start, end in zip(path[:-1], path[1:]):
@ -122,17 +109,24 @@ class Solver(BaseSolver):
            for y in range(y_start, y_end):
                blocks[x, y] = Cell.ROCK

-        self.print_blocks("start", blocks)
+print_blocks(blocks)
+print()

-        y_max = max(y for _, y in blocks)
+x_min, y_min, x_max, y_max = (
+    min(x for x, _ in blocks),
+    0,
+    max(x for x, _ in blocks),
+    max(y for _, y in blocks),
+)

 # === part 1 ===

 blocks_1 = flow(
    blocks.copy(), stop_fn=lambda x, y: y > y_max, fill_fn=lambda x, y: Cell.AIR
 )
-        self.print_blocks("part1", blocks_1)
-        yield sum(v == Cell.SAND for v in blocks_1.values())
+print_blocks(blocks_1)
+print(f"answer 1 is {sum(v == Cell.SAND for v in blocks_1.values())}")
+print()

 # === part 2 ===

@ -142,5 +136,5 @@ class Solver(BaseSolver):
    fill_fn=lambda x, y: Cell.AIR if y < y_max + 2 else Cell.ROCK,
 )
 blocks_2[500, 0] = Cell.SAND
-        self.print_blocks("part2", blocks_2)
-        yield sum(v == Cell.SAND for v in blocks_2.values())
+print_blocks(blocks_2)
+print(f"answer 2 is {sum(v == Cell.SAND for v in blocks_2.values())}")
--- a/src/holt59/aoc/2022/day15.py
+++ b/src/holt59/aoc/2022/day15.py
@ -1,17 +1,12 @@
-import itertools as it
-from typing import Any, Iterator
+import sys
+from typing import Any

 import numpy as np
 import parse  # type: ignore
 from numpy.typing import NDArray

-from ..base import BaseSolver

-
-class Solver(BaseSolver):
-    def part1(
-        self, sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], row: int
-    ) -> int:
+def part1(sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], row: int) -> int:
    no_beacons_row_l: list[NDArray[np.floating[Any]]] = []

    for (sx, sy), (bx, by) in sensor_to_beacon.items():
@ -21,14 +16,17 @@ class Solver(BaseSolver):
        no_beacons_row_l.append(sx + np.arange(0, d - abs(sy - row) + 1))  # type: ignore

    beacons_at_row = set(bx for (bx, by) in sensor_to_beacon.values() if by == row)
-        no_beacons_row = set(it.chain(*no_beacons_row_l)).difference(beacons_at_row)  # type: ignore
+    no_beacons_row = set(np.concatenate(no_beacons_row_l)).difference(beacons_at_row)  # type: ignore

    return len(no_beacons_row)

+
 def part2_intervals(
-        self, sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], xy_max: int
+    sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], xy_max: int
 ) -> tuple[int, int, int]:
-        for y in self.progress.wrap(range(xy_max + 1)):
+    from tqdm import trange
+
+    for y in trange(xy_max + 1):
        its: list[tuple[int, int]] = []
        for (sx, sy), (bx, by) in sensor_to_beacon.items():
            d = abs(sx - bx) + abs(sy - by)
@ -48,8 +46,9 @@ class Solver(BaseSolver):

    return (0, 0, 0)

+
 def part2_cplex(
-        self, sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], xy_max: int
+    sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], xy_max: int
 ) -> tuple[int, int, int]:
    from docplex.mp.model import Model

@ -59,10 +58,7 @@ class Solver(BaseSolver):

    for (sx, sy), (bx, by) in sensor_to_beacon.items():
        d = abs(sx - bx) + abs(sy - by)
-            m.add_constraint(
-                m.abs(x - sx) + m.abs(y - sy) >= d + 1,  # type: ignore
-                ctname=f"ct_{sx}_{sy}",
-            )
+        m.add_constraint(m.abs(x - sx) + m.abs(y - sy) >= d + 1, ctname=f"ct_{sx}_{sy}")  # type: ignore

    m.set_objective("min", x + y)

@ -73,8 +69,8 @@ class Solver(BaseSolver):
    vy = int(s.get_value(y))
    return vx, vy, 4_000_000 * vx + vy

-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+
+lines = sys.stdin.read().splitlines()

 sensor_to_beacon: dict[tuple[int, int], tuple[int, int]] = {}

@ -87,9 +83,8 @@ class Solver(BaseSolver):
 xy_max = 4_000_000 if max(sensor_to_beacon) > (1_000, 0) else 20
 row = 2_000_000 if max(sensor_to_beacon) > (1_000, 0) else 10

-        yield self.part1(sensor_to_beacon, row)
+print(f"answer 1 is {part1(sensor_to_beacon, row)}")

 # x, y, a2 = part2_cplex(sensor_to_beacon, xy_max)
-        x, y, a2 = self.part2_intervals(sensor_to_beacon, xy_max)
-        self.logger.info(f"answer 2 is {a2} (x={x}, y={y})")
-        yield a2
+x, y, a2 = part2_intervals(sensor_to_beacon, xy_max)
+print(f"answer 2 is {a2} (x={x}, y={y})")
--- a/src/holt59/aoc/2022/day16.py
+++ b/src/holt59/aoc/2022/day16.py
@ -3,10 +3,11 @@ from __future__ import annotations
 import heapq
 import itertools
 import re
+import sys
 from collections import defaultdict
-from typing import Any, FrozenSet, Iterator, NamedTuple
+from typing import FrozenSet, NamedTuple

-from ..base import BaseSolver
+from tqdm import tqdm


 class Pipe(NamedTuple):
@ -35,8 +36,8 @@ def breadth_first_search(pipes: dict[str, Pipe], pipe: Pipe) -> dict[Pipe, int]:
    Runs a BFS from the given pipe and return the shortest distance (in term of hops)
    to all other pipes.
    """
-    queue = [(0, pipe)]
-    visited: set[Pipe] = set()
+    queue = [(0, pipe_1)]
+    visited = set()
    distances: dict[Pipe, int] = {}

    while len(distances) < len(pipes):
@ -60,12 +61,7 @@ def update_with_better(
    node_at_times[flowing] = max(node_at_times[flowing], flow)


-# === MAIN ===
-
-
-class Solver(BaseSolver):
 def part_1(
-        self,
    start_pipe: Pipe,
    max_time: int,
    distances: dict[tuple[Pipe, Pipe], int],
@ -102,17 +98,15 @@ class Solver(BaseSolver):
        for flow in nodes_of_pipe.values()
    )

+
 def part_2(
-        self,
    start_pipe: Pipe,
    max_time: int,
    distances: dict[tuple[Pipe, Pipe], int],
    relevant_pipes: FrozenSet[Pipe],
 ):
    def compute(pipes_for_me: FrozenSet[Pipe]) -> int:
-            return self.part_1(
-                start_pipe, max_time, distances, pipes_for_me
-            ) + self.part_1(
+        return part_1(start_pipe, max_time, distances, pipes_for_me) + part_1(
            start_pipe, max_time, distances, relevant_pipes - pipes_for_me
        )

@ -122,10 +116,14 @@ class Solver(BaseSolver):
        for relevant_pipes_1 in itertools.combinations(relevant_pipes, r)
    ]

-        return max(compute(comb) for comb in self.progress.wrap(combs))
+    return max(compute(comb) for comb in tqdm(combs))
+
+
+# === MAIN ===
+
+
+lines = sys.stdin.read().splitlines()

-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]

 pipes: dict[str, Pipe] = {}
 for line in lines:
@ -152,8 +150,9 @@ class Solver(BaseSolver):
 # valves with flow
 relevant_pipes = frozenset(pipe for pipe in pipes.values() if pipe.flow > 0)

+
 # 1651, 1653
-        yield self.part_1(pipes["AA"], 30, distances, relevant_pipes)
+print(part_1(pipes["AA"], 30, distances, relevant_pipes))

 # 1707, 2223
-        yield self.part_2(pipes["AA"], 26, distances, relevant_pipes)
+print(part_2(pipes["AA"], 26, distances, relevant_pipes))
--- a/src/holt59/aoc/2022/day17.py
+++ b/src/holt59/aoc/2022/day17.py
@ -1,16 +1,23 @@
-from typing import Any, Iterator, Sequence, TypeAlias, TypeVar
+import sys
+from typing import Sequence, TypeVar

 import numpy as np
-from numpy.typing import NDArray
-
-from ..base import BaseSolver

 T = TypeVar("T")

-Tower: TypeAlias = NDArray[np.bool]
+
+def print_tower(tower: np.ndarray, out: str = "#"):
+    print("-" * (tower.shape[1] + 2))
+    non_empty = False
+    for row in reversed(range(1, tower.shape[0])):
+        if not non_empty and not tower[row, :].any():
+            continue
+        non_empty = True
+        print("|" + "".join(out if c else "." for c in tower[row, :]) + "|")
+    print("+" + "-" * tower.shape[1] + "+")


-def tower_height(tower: Tower) -> int:
+def tower_height(tower: np.ndarray) -> int:
    return int(tower.shape[0] - tower[::-1, :].argmax(axis=0).min() - 1)


@ -38,8 +45,8 @@ def build_tower(
    n_rocks: int,
    jets: str,
    early_stop: bool = False,
-    init: Tower = np.ones(WIDTH, dtype=bool),
-) -> tuple[Tower, int, int, dict[int, int]]:
+    init: np.ndarray = np.ones(WIDTH, dtype=bool),
+) -> tuple[np.ndarray, int, int, dict[int, int]]:
    tower = EMPTY_BLOCKS.copy()
    tower[0, :] = init

@ -88,13 +95,14 @@ def build_tower(
    return tower, rock_count, done_at.get((i_rock, i_jet), -1), heights


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        tower, *_ = build_tower(2022, input)
-        yield tower_height(tower)
+line = sys.stdin.read().strip()
+
+tower, *_ = build_tower(2022, line)
+answer_1 = tower_height(tower)
+print(f"answer 1 is {answer_1}")

 TOTAL_ROCKS = 1_000_000_000_000
-        _tower_1, n_rocks_1, prev_1, heights_1 = build_tower(TOTAL_ROCKS, input, True)
+tower_1, n_rocks_1, prev_1, heights_1 = build_tower(TOTAL_ROCKS, line, True)
 assert prev_1 > 0

 # 2767 1513
@ -108,4 +116,5 @@ class Solver(BaseSolver):
    heights_1[prev_1 + remaining_rocks % n_repeat_rocks] - heights_1[prev_1]
 )

-        yield base_height + (n_repeat_towers + 1) * repeat_height + remaining_height
+answer_2 = base_height + (n_repeat_towers + 1) * repeat_height + remaining_height
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day18.py
+++ b/src/holt59/aoc/2022/day18.py
@ -1,16 +1,11 @@
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 xyz = np.asarray(
    [
        tuple(int(x) for x in row.split(","))  # type: ignore
-                for row in input.splitlines()
+        for row in sys.stdin.read().splitlines()
    ]
 )

@ -19,14 +14,14 @@ class Solver(BaseSolver):
 cubes = np.zeros(xyz.max(axis=0) + 3, dtype=bool)
 cubes[xyz[:, 0], xyz[:, 1], xyz[:, 2]] = True

+n_dims = len(cubes.shape)
+
 faces = [(-1, 0, 0), (1, 0, 0), (0, -1, 0), (0, 1, 0), (0, 0, -1), (0, 0, 1)]

-        yield sum(
-            1
-            for x, y, z in xyz
-            for dx, dy, dz in faces
-            if not cubes[x + dx, y + dy, z + dz]
+answer_1 = sum(
+    1 for x, y, z in xyz for dx, dy, dz in faces if not cubes[x + dx, y + dy, z + dz]
 )
+print(f"answer 1 is {answer_1}")

 visited = np.zeros_like(cubes, dtype=bool)
 queue = [(0, 0, 0)]
@ -42,9 +37,7 @@ class Solver(BaseSolver):

    for dx, dy, dz in faces:
        nx, ny, nz = x + dx, y + dy, z + dz
-                if not all(
-                    n >= 0 and n < cubes.shape[i] for i, n in enumerate((nx, ny, nz))
-                ):
+        if not all(n >= 0 and n < cubes.shape[i] for i, n in enumerate((nx, ny, nz))):
            continue

        if visited[nx, ny, nz]:
@ -54,5 +47,4 @@ class Solver(BaseSolver):
            n_faces += 1
        else:
            queue.append((nx, ny, nz))
-
-        yield n_faces
+print(f"answer 2 is {n_faces}")
--- a/src/holt59/aoc/2022/day19.py
+++ b/src/holt59/aoc/2022/day19.py
@ -1,11 +1,10 @@
-from typing import Any, Iterator, Literal
+import sys
+from typing import Any, Literal

 import numpy as np
 import parse  # pyright: ignore[reportMissingTypeStubs]
 from numpy.typing import NDArray

-from ..base import BaseSolver
-
 Reagent = Literal["ore", "clay", "obsidian", "geode"]
 REAGENTS: tuple[Reagent, ...] = (
    "ore",
@ -63,6 +62,29 @@ def dominates(lhs: State, rhs: State):
    )


+lines = sys.stdin.read().splitlines()
+
+blueprints: list[dict[Reagent, IntOfReagent]] = []
+for line in lines:
+    r: list[int] = parse.parse(  # type: ignore
+        "Blueprint {}: "
+        "Each ore robot costs {:d} ore. "
+        "Each clay robot costs {:d} ore. "
+        "Each obsidian robot costs {:d} ore and {:d} clay. "
+        "Each geode robot costs {:d} ore and {:d} obsidian.",
+        line,
+    )
+
+    blueprints.append(
+        {
+            "ore": {"ore": r[1]},
+            "clay": {"ore": r[2]},
+            "obsidian": {"ore": r[3], "clay": r[4]},
+            "geode": {"ore": r[5], "obsidian": r[6]},
+        }
+    )
+
+
 def run(blueprint: dict[Reagent, dict[Reagent, int]], max_time: int) -> int:
    # since we can only build one robot per time, we do not need more than X robots
    # of type K where X is the maximum number of K required among all robots, e.g.,
@ -151,31 +173,11 @@ def run(blueprint: dict[Reagent, dict[Reagent, int]], max_time: int) -> int:
    return max(state.reagents["geode"] for state in state_after_t[max_time])


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        blueprints: list[dict[Reagent, IntOfReagent]] = []
-        for line in input.splitlines():
-            r: list[int] = parse.parse(  # type: ignore
-                "Blueprint {}: "
-                "Each ore robot costs {:d} ore. "
-                "Each clay robot costs {:d} ore. "
-                "Each obsidian robot costs {:d} ore and {:d} clay. "
-                "Each geode robot costs {:d} ore and {:d} obsidian.",
-                line,
-            )
-
-            blueprints.append(
-                {
-                    "ore": {"ore": r[1]},
-                    "clay": {"ore": r[2]},
-                    "obsidian": {"ore": r[3], "clay": r[4]},
-                    "geode": {"ore": r[5], "obsidian": r[6]},
-                }
-            )
-
-        yield sum(
+answer_1 = sum(
    (i_blueprint + 1) * run(blueprint, 24)
    for i_blueprint, blueprint in enumerate(blueprints)
 )
+print(f"answer 1 is {answer_1}")

-        yield (run(blueprints[0], 32) * run(blueprints[1], 32) * run(blueprints[2], 32))
+answer_2 = run(blueprints[0], 32) * run(blueprints[1], 32) * run(blueprints[2], 32)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day2.py
+++ b/src/holt59/aoc/2022/day2.py
@ -1,6 +1,4 @@
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys


 def score_1(ux: int, vx: int) -> int:
@ -35,9 +33,7 @@ def score_2(ux: int, vx: int) -> int:
    return (ux + vx - 1) % 3 + 1 + vx * 3


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.readlines()

 # the solution relies on replacing rock / paper / scissor by values 0 / 1 / 2 and using
 # modulo-3 arithmetic
@ -51,7 +47,7 @@ class Solver(BaseSolver):
 values = [(ord(row[0]) - ord("A"), ord(row[2]) - ord("X")) for row in lines]

 # part 1 - 13526
-        yield sum(score_1(*v) for v in values)
+print(f"answer 1 is {sum(score_1(*v) for v in values)}")

 # part 2 - 14204
-        yield sum(score_2(*v) for v in values)
+print(f"answer 2 is {sum(score_2(*v) for v in values)}")
--- a/src/holt59/aoc/2022/day20.py
+++ b/src/holt59/aoc/2022/day20.py
@ -1,8 +1,6 @@
 from __future__ import annotations

-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys


 class Number:
@ -67,9 +65,10 @@ def decrypt(numbers: list[Number], key: int, rounds: int) -> int:
    )


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        numbers = [Number(int(x)) for x in input.splitlines()]
+numbers = [Number(int(x)) for i, x in enumerate(sys.stdin.readlines())]

-        yield decrypt(numbers, 1, 1)
-        yield decrypt(numbers, 811589153, 10)
+answer_1 = decrypt(numbers, 1, 1)
+print(f"answer 1 is {answer_1}")
+
+answer_2 = decrypt(numbers, 811589153, 10)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day21.py
+++ b/src/holt59/aoc/2022/day21.py
@ -1,7 +1,6 @@
 import operator
-from typing import Any, Callable, Iterator
-
-from ..base import BaseSolver
+import sys
+from typing import Callable


 def compute(monkeys: dict[str, int | tuple[str, str, str]], monkey: str) -> int:
@ -78,9 +77,7 @@ def invert(
    return monkeys


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 monkeys: dict[str, int | tuple[str, str, str]] = {}

@ -99,10 +96,12 @@ class Solver(BaseSolver):

        op_monkeys.add(name)

-        yield compute(monkeys.copy(), "root")
+
+answer_1 = compute(monkeys.copy(), "root")
+print(f"answer 1 is {answer_1}")

 # assume the second operand of 'root' can be computed, and the first one depends on
 # humn, which is the case is my input and the test input
-        assert isinstance(monkeys["root"], tuple)
 p1, _, p2 = monkeys["root"]  # type: ignore
-        yield compute(invert(monkeys, "humn", compute(monkeys.copy(), p2)), "humn")
+answer_2 = compute(invert(monkeys, "humn", compute(monkeys.copy(), p2)), "humn")
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day22.py
+++ b/src/holt59/aoc/2022/day22.py
@ -1,19 +1,16 @@
 import re
-from typing import Any, Callable, Iterator
+import sys
+from typing import Callable

 import numpy as np

-from ..base import BaseSolver
-
 VOID, EMPTY, WALL = 0, 1, 2
 TILE_FROM_CHAR = {" ": VOID, ".": EMPTY, "#": WALL}

 SCORES = {"E": 0, "S": 1, "W": 2, "N": 3}


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        board_map_s, direction_s = input.split("\n\n")
+board_map_s, direction_s = sys.stdin.read().split("\n\n")

 # board
 board_lines = board_map_s.splitlines()
@ -26,19 +23,16 @@ class Solver(BaseSolver):
 )

 directions = [
-            int(p1) if p2 else p1
-            for p1, p2 in re.findall(R"(([0-9])+|L|R)", direction_s)
+    int(p1) if p2 else p1 for p1, p2 in re.findall(R"(([0-9])+|L|R)", direction_s)
 ]

+
 # find on each row and column the first and last non-void
 row_first_non_void = np.argmax(board != VOID, axis=1)
-        row_last_non_void = (
-            board.shape[1] - np.argmax(board[:, ::-1] != VOID, axis=1) - 1
-        )
+row_last_non_void = board.shape[1] - np.argmax(board[:, ::-1] != VOID, axis=1) - 1
 col_first_non_void = np.argmax(board != VOID, axis=0)
-        col_last_non_void = (
-            board.shape[0] - np.argmax(board[::-1, :] != VOID, axis=0) - 1
-        )
+col_last_non_void = board.shape[0] - np.argmax(board[::-1, :] != VOID, axis=0) - 1
+

 faces = np.zeros_like(board)
 size = np.gcd(board.shape[0], board.shape[1])
@ -109,6 +103,7 @@ class Solver(BaseSolver):
        },
    }

+
 def wrap_part_1(y0: int, x0: int, r0: str) -> tuple[int, int, str]:
    if r0 == "E":
        return y0, row_first_non_void[y0], r0
@ -121,14 +116,14 @@ class Solver(BaseSolver):

    assert False

+
 def wrap_part_2(y0: int, x0: int, r0: str) -> tuple[int, int, str]:
    cube = faces[y0, x0]
    assert r0 in faces_wrap[cube]
    return faces_wrap[cube][r0](y0, x0)

-        def run(
-            wrap: Callable[[int, int, str], tuple[int, int, str]],
-        ) -> tuple[int, int, str]:
+
+def run(wrap: Callable[[int, int, str], tuple[int, int, str]]) -> tuple[int, int, str]:
    y0 = 0
    x0 = np.where(board[0] == EMPTY)[0][0]
    r0 = "E"
@ -137,9 +132,7 @@ class Solver(BaseSolver):
        if isinstance(direction, int):
            while direction > 0:
                if r0 == "E":
-                            xi = np.where(
-                                board[y0, x0 + 1 : x0 + direction + 1] == WALL
-                            )[0]
+                    xi = np.where(board[y0, x0 + 1 : x0 + direction + 1] == WALL)[0]
                    if len(xi):
                        x0 = x0 + xi[0]
                        direction = 0
@ -155,14 +148,10 @@ class Solver(BaseSolver):
                            x0 = row_last_non_void[y0]
                            direction = 0
                        else:
-                                    direction = (
-                                        direction - (row_last_non_void[y0] - x0) - 1
-                                    )
+                            direction = direction - (row_last_non_void[y0] - x0) - 1
                            y0, x0, r0 = y0_t, x0_t, r0_t
                elif r0 == "S":
-                            yi = np.where(
-                                board[y0 + 1 : y0 + direction + 1, x0] == WALL
-                            )[0]
+                    yi = np.where(board[y0 + 1 : y0 + direction + 1, x0] == WALL)[0]
                    if len(yi):
                        y0 = y0 + yi[0]
                        direction = 0
@ -178,9 +167,7 @@ class Solver(BaseSolver):
                            y0 = col_last_non_void[x0]
                            direction = 0
                        else:
-                                    direction = (
-                                        direction - (col_last_non_void[x0] - y0) - 1
-                                    )
+                            direction = direction - (col_last_non_void[x0] - y0) - 1
                            y0, x0, r0 = y0_t, x0_t, r0_t
                elif r0 == "W":
                    left = max(x0 - direction - 1, 0)
@ -188,10 +175,7 @@ class Solver(BaseSolver):
                    if len(xi):
                        x0 = left + xi[-1] + 1
                        direction = 0
-                            elif (
-                                x0 - direction >= 0
-                                and board[y0, x0 - direction] == EMPTY
-                            ):
+                    elif x0 - direction >= 0 and board[y0, x0 - direction] == EMPTY:
                        x0 = x0 - direction
                        direction = 0
                    else:
@ -200,9 +184,7 @@ class Solver(BaseSolver):
                            x0 = row_first_non_void[y0]
                            direction = 0
                        else:
-                                    direction = (
-                                        direction - (x0 - row_first_non_void[y0]) - 1
-                                    )
+                            direction = direction - (x0 - row_first_non_void[y0]) - 1
                            y0, x0, r0 = y0_t, x0_t, r0_t
                elif r0 == "N":
                    top = max(y0 - direction - 1, 0)
@ -210,10 +192,7 @@ class Solver(BaseSolver):
                    if len(yi):
                        y0 = top + yi[-1] + 1
                        direction = 0
-                            elif (
-                                y0 - direction >= 0
-                                and board[y0 - direction, x0] == EMPTY
-                            ):
+                    elif y0 - direction >= 0 and board[y0 - direction, x0] == EMPTY:
                        y0 = y0 - direction
                        direction = 0
                    else:
@ -222,9 +201,7 @@ class Solver(BaseSolver):
                            y0 = col_first_non_void[x0]
                            direction = 0
                        else:
-                                    direction = (
-                                        direction - (y0 - col_first_non_void[x0]) - 1
-                                    )
+                            direction = direction - (y0 - col_first_non_void[x0]) - 1
                            y0, x0, r0 = y0_t, x0_t, r0_t
        else:
            r0 = {
@ -236,8 +213,11 @@ class Solver(BaseSolver):

    return y0, x0, r0

+
 y1, x1, r1 = run(wrap_part_1)
-        yield 1000 * (1 + y1) + 4 * (1 + x1) + SCORES[r1]
+answer_1 = 1000 * (1 + y1) + 4 * (1 + x1) + SCORES[r1]
+print(f"answer 1 is {answer_1}")

 y2, x2, r2 = run(wrap_part_2)
-        yield 1000 * (1 + y2) + 4 * (1 + x2) + SCORES[r2]
+answer_2 = 1000 * (1 + y2) + 4 * (1 + x2) + SCORES[r2]
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day23.py
+++ b/src/holt59/aoc/2022/day23.py
@ -1,8 +1,6 @@
 import itertools
+import sys
 from collections import defaultdict
-from typing import Any, Iterator
-
-from ..base import BaseSolver

 Directions = list[
    tuple[
@ -20,10 +18,22 @@ DIRECTIONS: Directions = [


 def min_max_yx(positions: set[tuple[int, int]]) -> tuple[int, int, int, int]:
-    ys, xs = {y for y, _x in positions}, {x for _y, x in positions}
+    ys, xs = {y for y, x in positions}, {x for y, x in positions}
    return min(ys), min(xs), max(ys), max(xs)


+def print_positions(positions: set[tuple[int, int]]):
+    min_y, min_x, max_y, max_x = min_max_yx(positions)
+    print(
+        "\n".join(
+            "".join(
+                "#" if (y, x) in positions else "." for x in range(min_x - 1, max_x + 2)
+            )
+            for y in range(min_y - 1, max_y + 2)
+        )
+    )
+
+
 def round(
    positions: set[tuple[int, int]],
    directions: Directions,
@ -59,11 +69,9 @@ def round(
    directions.append(directions.pop(0))


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 POSITIONS = {
    (i, j)
-            for i, row in enumerate(input.splitlines())
+    for i, row in enumerate(sys.stdin.read().splitlines())
    for j, col in enumerate(row)
    if col == "#"
 }
@ -71,15 +79,14 @@ class Solver(BaseSolver):
 # === part 1 ===

 p1, d1 = POSITIONS.copy(), DIRECTIONS.copy()
-        for _ in range(10):
+for r in range(10):
    round(p1, d1)

 min_y, min_x, max_y, max_x = min_max_yx(p1)
-        yield sum(
-            (y, x) not in p1
-            for y in range(min_y, max_y + 1)
-            for x in range(min_x, max_x + 1)
+answer_1 = sum(
+    (y, x) not in p1 for y in range(min_y, max_y + 1) for x in range(min_x, max_x + 1)
 )
+print(f"answer 1 is {answer_1}")

 # === part 2 ===

@ -93,4 +100,4 @@ class Solver(BaseSolver):
    if backup == p2:
        break

-        yield answer_2
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day24.py
+++ b/src/holt59/aoc/2022/day24.py
@ -1,14 +1,9 @@
 import heapq
 import math
+import sys
 from collections import defaultdict
-from typing import Any, Iterator

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 winds = {
    (i - 1, j - 1, lines[i][j])
@ -20,12 +15,8 @@ class Solver(BaseSolver):
 n_rows, n_cols = len(lines) - 2, len(lines[0]) - 2
 CYCLE = math.lcm(n_rows, n_cols)

-        east_winds = [
-            {j for j in range(n_cols) if (i, j, ">") in winds} for i in range(n_rows)
-        ]
-        west_winds = [
-            {j for j in range(n_cols) if (i, j, "<") in winds} for i in range(n_rows)
-        ]
+east_winds = [{j for j in range(n_cols) if (i, j, ">") in winds} for i in range(n_rows)]
+west_winds = [{j for j in range(n_cols) if (i, j, "<") in winds} for i in range(n_rows)]
 north_winds = [
    {i for i in range(n_rows) if (i, j, "^") in winds} for j in range(n_cols)
 ]
@ -33,14 +24,13 @@ class Solver(BaseSolver):
    {i for i in range(n_rows) if (i, j, "v") in winds} for j in range(n_cols)
 ]

+
 def run(start: tuple[int, int], start_cycle: int, end: tuple[int, int]):
    def heuristic(y: int, x: int) -> int:
        return abs(end[0] - y) + abs(end[1] - x)

    # (distance + heuristic, distance, (start_pos, cycle))
-            queue = [
-                (heuristic(start[0], start[1]), 0, ((start[0], start[1]), start_cycle))
-            ]
+    queue = [(heuristic(start[0], start[1]), 0, ((start[0], start[1]), start_cycle))]
    visited: set[tuple[tuple[int, int], int]] = set()
    distances: dict[tuple[int, int], dict[int, int]] = defaultdict(lambda: {})

@ -64,17 +54,13 @@ class Solver(BaseSolver):
            n_cycle = (cycle + 1) % CYCLE

            if (ty, tx) == end:
-                        heapq.heappush(
-                            queue, (distance + 1, distance + 1, ((ty, tx), n_cycle))
-                        )
+                heapq.heappush(queue, (distance + 1, distance + 1, ((ty, tx), n_cycle)))
                break

            if ((ty, tx), n_cycle) in visited:
                continue

-                    if (ty, tx) != start and (
-                        ty < 0 or tx < 0 or ty >= n_rows or tx >= n_cols
-                    ):
+            if (ty, tx) != start and (ty < 0 or tx < 0 or ty >= n_rows or tx >= n_cols):
                continue

            if (ty, tx) != start:
@ -89,17 +75,12 @@ class Solver(BaseSolver):

            heapq.heappush(
                queue,
-                        (
-                            (
-                                heuristic(ty, tx) + distance + 1,
-                                distance + 1,
-                                ((ty, tx), n_cycle),
-                            )
-                        ),
+                ((heuristic(ty, tx) + distance + 1, distance + 1, ((ty, tx), n_cycle))),
            )

    return distances, next(iter(distances[end].values()))

+
 start = (
    -1,
    next(j for j in range(1, len(lines[0]) - 1) if lines[0][j] == ".") - 1,
@ -110,8 +91,8 @@ class Solver(BaseSolver):
 )

 distances_1, forward_1 = run(start, 0, end)
-        yield forward_1
+print(f"answer 1 is {forward_1}")

 distances_2, return_1 = run(end, next(iter(distances_1[end].keys())), start)
-        _distances_3, forward_2 = run(start, next(iter(distances_2[start].keys())), end)
-        yield forward_1 + return_1 + forward_2
+distances_3, forward_2 = run(start, next(iter(distances_2[start].keys())), end)
+print(f"answer 2 is {forward_1 + return_1 + forward_2}")
--- a/src/holt59/aoc/2022/day25.py
+++ b/src/holt59/aoc/2022/day25.py
@ -1,14 +1,10 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 coeffs = {"2": 2, "1": 1, "0": 0, "-": -1, "=": -2}

+
 def snafu2number(number: str) -> int:
    value = 0
    for c in number:
@ -16,6 +12,7 @@ class Solver(BaseSolver):
        value += coeffs[c]
    return value

+
 def number2snafu(number: int) -> str:
    values = ["0", "1", "2", "=", "-"]
    res = ""
@ -25,4 +22,6 @@ class Solver(BaseSolver):
        number = number // 5 + int(mod >= 3)
    return "".join(reversed(res))

-        yield number2snafu(sum(map(snafu2number, lines)))
+
+answer_1 = number2snafu(sum(map(snafu2number, lines)))
+print(f"answer 1 is {answer_1}")
--- a/src/holt59/aoc/2022/day3.py
+++ b/src/holt59/aoc/2022/day3.py
@ -1,28 +1,23 @@
 import string
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = [line.strip() for line in sys.stdin.readlines()]

 # extract content of each part
-        parts = [
-            (set(line[: len(line) // 2]), set(line[len(line) // 2 :])) for line in lines
-        ]
+parts = [(set(line[: len(line) // 2]), set(line[len(line) // 2 :])) for line in lines]

 # priorities
 priorities = {c: i + 1 for i, c in enumerate(string.ascii_letters)}

 # part 1
-        yield sum(priorities[c] for p1, p2 in parts for c in p1.intersection(p2))
+part1 = sum(priorities[c] for p1, p2 in parts for c in p1.intersection(p2))
+print(f"answer 1 is {part1}")

 # part 2
 n_per_group = 3
-        yield sum(
+part2 = sum(
    priorities[c]
    for i in range(0, len(lines), n_per_group)
    for c in set(lines[i]).intersection(*lines[i + 1 : i + n_per_group])
 )
+print(f"answer 2 is {part2}")
--- a/src/holt59/aoc/2022/day4.py
+++ b/src/holt59/aoc/2022/day4.py
@ -1,6 +1,6 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = [line.strip() for line in sys.stdin.readlines()]


 def make_range(value: str) -> set[int]:
@ -8,13 +8,10 @@ def make_range(value: str) -> set[int]:
    return set(range(int(parts[0]), int(parts[1]) + 1))


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+sections = [tuple(make_range(part) for part in line.split(",")) for line in lines]

-        sections = [
-            tuple(make_range(part) for part in line.split(",")) for line in lines
-        ]
+answer_1 = sum(s1.issubset(s2) or s2.issubset(s1) for s1, s2 in sections)
+print(f"answer 1 is {answer_1}")

-        yield sum(s1.issubset(s2) or s2.issubset(s1) for s1, s2 in sections)
-        yield sum(bool(s1.intersection(s2)) for s1, s2 in sections)
+answer_2 = sum(bool(s1.intersection(s2)) for s1, s2 in sections)
+print(f"answer 1 is {answer_2}")
--- a/src/holt59/aoc/2022/day5.py
+++ b/src/holt59/aoc/2022/day5.py
@ -1,12 +1,7 @@
 import copy
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        blocks_s, moves_s = (part.splitlines() for part in input.split("\n\n"))
+blocks_s, moves_s = (part.splitlines() for part in sys.stdin.read().split("\n\n"))

 blocks: dict[str, list[str]] = {stack: [] for stack in blocks_s[-1].split()}

@ -39,5 +34,8 @@ class Solver(BaseSolver):
    blocks_2[to_].extend(blocks_2[from_][-count:])
    del blocks_2[from_][-count:]

-        yield "".join(s[-1] for s in blocks_1.values())
-        yield "".join(s[-1] for s in blocks_2.values())
+answer_1 = "".join(s[-1] for s in blocks_1.values())
+print(f"answer 1 is {answer_1}")
+
+answer_2 = "".join(s[-1] for s in blocks_2.values())
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day6.py
+++ b/src/holt59/aoc/2022/day6.py
@ -1,6 +1,4 @@
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys


 def index_of_first_n_differents(data: str, n: int) -> int:
@ -10,7 +8,8 @@ def index_of_first_n_differents(data: str, n: int) -> int:
    return -1


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        yield index_of_first_n_differents(input, 4)
-        yield index_of_first_n_differents(input, 14)
+data = sys.stdin.read().strip()
+
+
+print(f"answer 1 is {index_of_first_n_differents(data, 4)}")
+print(f"answer 2 is {index_of_first_n_differents(data, 14)}")
--- a/src/holt59/aoc/2022/day7.py
+++ b/src/holt59/aoc/2022/day7.py
@ -1,12 +1,7 @@
+import sys
 from pathlib import Path
-from typing import Any, Iterator

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 # we are going to use Path to create path and go up/down in the file tree since it
 # implements everything we need
@ -58,6 +53,7 @@ class Solver(BaseSolver):
        trees[cur_path].append(path)
        sizes[path] = size

+
 def compute_size(path: Path) -> int:
    size = sizes[path]

@ -66,10 +62,12 @@ class Solver(BaseSolver):

    return sum(compute_size(sub) for sub in trees[path])

+
 acc_sizes = {path: compute_size(path) for path in trees}

 # part 1
-        yield sum(size for size in acc_sizes.values() if size <= 100_000)
+answer_1 = sum(size for size in acc_sizes.values() if size <= 100_000)
+print(f"answer 1 is {answer_1}")

 # part 2
 total_space = 70_000_000
@ -78,4 +76,5 @@ class Solver(BaseSolver):

 to_free_space = update_space - free_space

-        yield min(size for size in acc_sizes.values() if size >= to_free_space)
+answer_2 = min(size for size in acc_sizes.values() if size >= to_free_space)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day8.py
+++ b/src/holt59/aoc/2022/day8.py
@ -1,14 +1,9 @@
-from typing import Any, Iterator
+import sys

 import numpy as np
 from numpy.typing import NDArray

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 trees = np.array([[int(x) for x in row] for row in lines])

@ -27,7 +22,9 @@ class Solver(BaseSolver):
    for i in range(1, trees.shape[0] - 1)
 ]

-        yield (highest_trees.min(axis=2) < trees).sum()
+answer_1 = (highest_trees.min(axis=2) < trees).sum()
+print(f"answer 1 is {answer_1}")
+

 def viewing_distance(row_of_trees: NDArray[np.int_], value: int) -> int:
    w = np.where(row_of_trees >= value)[0]
@ -37,6 +34,7 @@ class Solver(BaseSolver):

    return w[0] + 1

+
 # answer 2
 v_distances = np.zeros(trees.shape + (4,), dtype=int)
 v_distances[1:-1, 1:-1, :] = [
@ -51,4 +49,5 @@ class Solver(BaseSolver):
    ]
    for i in range(1, trees.shape[0] - 1)
 ]
-        yield np.prod(v_distances, axis=2).max()
+answer_2 = np.prod(v_distances, axis=2).max()
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2022/day9.py
+++ b/src/holt59/aoc/2022/day9.py
@ -1,10 +1,7 @@
-import itertools as it
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
-

 def move(head: tuple[int, int], command: str) -> tuple[int, int]:
    h_col, h_row = head
@ -46,14 +43,17 @@ def run(commands: list[str], n_blocks: int) -> list[tuple[int, int]]:
    return visited


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = [line.strip() for line in input.splitlines()]
+lines = sys.stdin.read().splitlines()

 # flatten the commands
-        commands = list(
-            it.chain(*(p[0] * int(p[1]) for line in lines if (p := line.split())))
-        )
+commands: list[str] = []
+for line in lines:
+    d, c = line.split()
+    commands.extend(d * int(c))

-        yield len(set(run(commands, n_blocks=2)))
-        yield len(set(run(commands, n_blocks=10)))
+
+visited_1 = run(commands, n_blocks=2)
+print(f"answer 1 is {len(set(visited_1))}")
+
+visited_2 = run(commands, n_blocks=10)
+print(f"answer 2 is {len(set(visited_2))}")
--- a/src/holt59/aoc/2023/day1.py
+++ b/src/holt59/aoc/2023/day1.py
@ -1,9 +1,27 @@
-from typing import Any, Iterator
+import sys

-from ..base import BaseSolver
+lines = sys.stdin.read().splitlines()
+
+lookups_1 = {str(d): d for d in range(1, 10)}
+lookups_2 = lookups_1 | {
+    d: i + 1
+    for i, d in enumerate(
+        (
+            "one",
+            "two",
+            "three",
+            "four",
+            "five",
+            "six",
+            "seven",
+            "eight",
+            "nine",
+        )
+    )
+}


-def find_values(lines: list[str], lookups: dict[str, int]) -> list[int]:
+def find_values(lookups: dict[str, int]) -> list[int]:
    values: list[int] = []

    for line in filter(bool, lines):
@ -23,27 +41,5 @@ def find_values(lines: list[str], lookups: dict[str, int]) -> list[int]:
    return values


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lookups_1 = {str(d): d for d in range(1, 10)}
-        lookups_2 = lookups_1 | {
-            d: i + 1
-            for i, d in enumerate(
-                (
-                    "one",
-                    "two",
-                    "three",
-                    "four",
-                    "five",
-                    "six",
-                    "seven",
-                    "eight",
-                    "nine",
-                )
-            )
-        }
-
-        lines = input.splitlines()
-
-        yield sum(find_values(lines, lookups_1))
-        yield sum(find_values(lines, lookups_2))
+print(f"answer 1 is {sum(find_values(lookups_1))}")
+print(f"answer 2 is {sum(find_values(lookups_2))}")
--- a/src/holt59/aoc/2023/day10.py
+++ b/src/holt59/aoc/2023/day10.py
@ -1,14 +1,13 @@
-from typing import Any, Iterator, Literal, cast
+import os
+import sys
+from typing import Literal, cast

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"

 Symbol = Literal["|", "-", "L", "J", "7", "F", ".", "S"]

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 lines: list[list[Symbol]] = [
-            [cast(Symbol, symbol) for symbol in line] for line in input.splitlines()
+    [cast(Symbol, symbol) for symbol in line] for line in sys.stdin.read().splitlines()
 ]

 # find starting point
@ -52,7 +51,8 @@ class Solver(BaseSolver):

    loop.append((i, j))

-        yield len(loop) // 2
+answer_1 = len(loop) // 2
+print(f"answer 1 is {answer_1}")

 # part 2

@ -83,17 +83,18 @@ class Solver(BaseSolver):
        if (i, j) in loop_s and lines[i][j] in "|LJ":
            cnt += 1

-        if self.files:
-            rows = [["." for _j in range(len(lines[0]))] for _i in range(len(lines))]
-            rows[si][sj] = "\033[91mS\033[0m"
+if VERBOSE:
+    for i in range(len(lines)):
+        for j in range(len(lines[0])):
+            if (i, j) == (si, sj):
+                print("\033[91mS\033[0m", end="")
+            elif (i, j) in loop:
+                print(lines[i][j], end="")
+            elif (i, j) in inside:
+                print("\033[92mI\033[0m", end="")
+            else:
+                print(".", end="")
+        print()

-            for i, j in loop:
-                rows[i][j] = lines[i][j]
-            for i, j in inside:
-                rows[i][j] = "\033[92mI\033[0m"
-
-            self.files.create(
-                "output.txt", "\n".join("".join(row) for row in rows).encode(), True
-            )
-
-        yield len(inside)
+answer_2 = len(inside)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day11.py
+++ b/src/holt59/aoc/2023/day11.py
@ -1,13 +1,8 @@
-from typing import Any, Iterator
+import sys

 import numpy as np

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 data = np.array([[c == "#" for c in line] for line in lines])

@ -16,6 +11,7 @@ class Solver(BaseSolver):

 galaxies_y, galaxies_x = np.where(data)  # type: ignore

+
 def compute_total_distance(expansion: int) -> int:
    distances: list[int] = []
    for g1 in range(len(galaxies_y)):
@ -35,8 +31,11 @@ class Solver(BaseSolver):
            distances.append(dx + dy)
    return sum(distances)

+
 # part 1
-        yield compute_total_distance(2)
+answer_1 = compute_total_distance(2)
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield compute_total_distance(1000000)
+answer_2 = compute_total_distance(1000000)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day12.py
+++ b/src/holt59/aoc/2023/day12.py
@ -1,7 +1,9 @@
+import os
+import sys
 from functools import lru_cache
-from typing import Any, Iterable, Iterator
+from typing import Iterable

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"


@lru_cache
@ -75,29 +77,31 @@ def compute_possible_arrangements(
        )


-class Solver(BaseSolver):
-    def compute_all_possible_arrangements(
-        self, lines: Iterable[str], repeat: int
-    ) -> int:
+def compute_all_possible_arrangements(lines: Iterable[str], repeat: int) -> int:
    count = 0

-        for i_line, line in enumerate(lines):
-            self.logger.info(f"processing line {i_line}: {line}...")
+    if VERBOSE:
+        from tqdm import tqdm
+
+        lines = tqdm(lines)
+
+    for line in lines:
        parts = line.split(" ")
        count += compute_possible_arrangements(
-                tuple(
-                    filter(len, "?".join(parts[0] for _ in range(repeat)).split("."))
-                ),
+            tuple(filter(len, "?".join(parts[0] for _ in range(repeat)).split("."))),
            tuple(int(c) for c in parts[1].split(",")) * repeat,
        )

    return count

-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+
+lines = sys.stdin.read().splitlines()
+

 # part 1
-        yield self.compute_all_possible_arrangements(lines, 1)
+answer_1 = compute_all_possible_arrangements(lines, 1)
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield self.compute_all_possible_arrangements(lines, 5)
+answer_2 = compute_all_possible_arrangements(lines, 5)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day13.py
+++ b/src/holt59/aoc/2023/day13.py
@ -1,6 +1,5 @@
-from typing import Any, Callable, Iterator, Literal
-
-from ..base import BaseSolver
+import sys
+from typing import Callable, Literal


 def split(block: list[str], axis: Literal[0, 1], count: int) -> int:
@ -26,18 +25,19 @@ def split(block: list[str], axis: Literal[0, 1], count: int) -> int:
    return 0


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        blocks = [block.splitlines() for block in input.split("\n\n")]
+blocks = [block.splitlines() for block in sys.stdin.read().split("\n\n")]
+

 # part 1
-        yield sum(
+answer_1 = sum(
    split(block, axis=1, count=0) + 100 * split(block, axis=0, count=0)
    for block in blocks
 )
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield sum(
+answer_2 = sum(
    split(block, axis=1, count=1) + 100 * split(block, axis=0, count=1)
    for block in blocks
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day14.py
+++ b/src/holt59/aoc/2023/day14.py
@ -1,9 +1,10 @@
-from typing import Any, Iterator, TypeAlias
-
-from ..base import BaseSolver
+import sys
+from typing import TypeAlias

 RockGrid: TypeAlias = list[list[str]]

+rocks0 = [list(line) for line in sys.stdin.read().splitlines()]
+

 def slide_rocks_top(rocks: RockGrid) -> RockGrid:
    top = [0 if c == "." else 1 for c in rocks[0]]
@ -33,17 +34,13 @@ def cycle(rocks: RockGrid) -> RockGrid:
    return rocks


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        rocks0 = [list(line) for line in input.splitlines()]
-
 rocks = slide_rocks_top([[c for c in r] for r in rocks0])

 # part 1
-        yield sum(
-            (len(rocks) - i) * sum(1 for c in row if c == "O")
-            for i, row in enumerate(rocks)
+answer_1 = sum(
+    (len(rocks) - i) * sum(1 for c in row if c == "O") for i, row in enumerate(rocks)
 )
+print(f"answer 1 is {answer_1}")

 # part 2
 rocks = rocks0
@ -64,7 +61,8 @@ class Solver(BaseSolver):

 ci = cycle_start + (N - cycle_start) % cycle_length - 1

-        yield sum(
+answer_2 = sum(
    (len(rocks) - i) * sum(1 for c in row if c == "O")
    for i, row in enumerate(cycles[ci])
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day15.py
+++ b/src/holt59/aoc/2023/day15.py
@ -1,19 +1,16 @@
+import sys
 from functools import reduce
-from typing import Any, Iterator

-from ..base import BaseSolver
+steps = sys.stdin.read().strip().split(",")


 def _hash(s: str) -> int:
    return reduce(lambda v, u: ((v + ord(u)) * 17) % 256, s, 0)


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        steps = input.split(",")
-
 # part 1
-        yield sum(map(_hash, steps))
+answer_1 = sum(map(_hash, steps))
+print(f"answer 1 is {answer_1}")

 # part 2
 boxes: list[dict[str, int]] = [{} for _ in range(256)]
@ -26,8 +23,9 @@ class Solver(BaseSolver):
        label = step[:-1]
        boxes[_hash(label)].pop(label, None)

-        yield sum(
+answer_2 = sum(
    i_box * i_lens * length
    for i_box, box in enumerate(boxes, start=1)
    for i_lens, length in enumerate(box.values(), start=1)
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day16.py
+++ b/src/holt59/aoc/2023/day16.py
@ -1,6 +1,8 @@
-from typing import Any, Iterator, Literal, TypeAlias, cast
+import os
+import sys
+from typing import Literal, TypeAlias, cast

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"

 CellType: TypeAlias = Literal[".", "|", "-", "\\", "/"]
 Direction: TypeAlias = Literal["R", "L", "U", "D"]
@ -76,25 +78,19 @@ def propagate(
    return beams


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 layout: list[list[CellType]] = [
-            [cast(CellType, col) for col in row] for row in input.splitlines()
+    [cast(CellType, col) for col in row] for row in sys.stdin.read().splitlines()
 ]

+
 beams = propagate(layout, (0, 0), "R")

-        if self.files:
-            self.files.create(
-                "beams.txt",
-                "\n".join(
-                    "".join("#" if col else "." for col in row) for row in beams
-                ).encode(),
-                True,
-            )
+if VERBOSE:
+    print("\n".join(["".join("#" if col else "." for col in row) for row in beams]))

 # part 1
-        yield sum(sum(map(bool, row)) for row in beams)
+answer_1 = sum(sum(map(bool, row)) for row in beams)
+print(f"answer 1 is {answer_1}")

 # part 2
 n_rows, n_cols = len(layout), len(layout[0])
@ -107,7 +103,8 @@ class Solver(BaseSolver):
    cases.append(((0, col), "D"))
    cases.append(((n_rows - 1, col), "U"))

-        yield max(
+answer_2 = max(
    sum(sum(map(bool, row)) for row in propagate(layout, start, direction))
    for start, direction in cases
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day17.py
+++ b/src/holt59/aoc/2023/day17.py
@ -1,11 +1,13 @@
 from __future__ import annotations

 import heapq
+import os
+import sys
 from collections import defaultdict
 from dataclasses import dataclass
-from typing import Any, Iterator, Literal, TypeAlias
+from typing import Literal, TypeAlias

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"

 Direction: TypeAlias = Literal[">", "<", "^", "v"]

@ -30,17 +32,11 @@ MAPPINGS: dict[Direction, tuple[int, int, Direction]] = {
 }


-class Solver(BaseSolver):
 def print_shortest_path(
-        self,
-        name: str,
    grid: list[list[int]],
    target: tuple[int, int],
    per_cell: dict[tuple[int, int], list[tuple[Label, int]]],
 ):
-        if not self.files:
-            return
-
    assert len(per_cell[target]) == 1
    label = per_cell[target][0][0]

@ -70,19 +66,16 @@ class Solver(BaseSolver):
                if (r, c) != (prev_label.row, prev_label.col):
                    p_grid[r][c] = f"\033[93m{grid[r][c]}\033[0m"

-            p_grid[label.row][label.col] = (
-                f"\033[91m{grid[label.row][label.col]}\033[0m"
-            )
+        p_grid[label.row][label.col] = f"\033[91m{grid[label.row][label.col]}\033[0m"

        prev_label = label

    p_grid[0][0] = f"\033[92m{grid[0][0]}\033[0m"

-        self.files.create(
-            name, "\n".join("".join(row) for row in p_grid).encode(), True
-        )
+    print("\n".join("".join(row) for row in p_grid))

-    def shortest_many_paths(self, grid: list[list[int]]) -> dict[tuple[int, int], int]:
+
+def shortest_many_paths(grid: list[list[int]]) -> dict[tuple[int, int], int]:
    n_rows, n_cols = len(grid), len(grid[0])

    visited: dict[tuple[int, int], tuple[Label, int]] = {}
@ -132,9 +125,8 @@ class Solver(BaseSolver):

    return {(r, c): visited[r, c][1] for r in range(n_rows) for c in range(n_cols)}

+
 def shortest_path(
-        self,
-        name: str,
    grid: list[list[int]],
    min_straight: int,
    max_straight: int,
@ -223,16 +215,19 @@ class Solver(BaseSolver):
                ),
            )

-        self.print_shortest_path(f"shortest-path_{name}.txt", grid, target, per_cell)
+    if VERBOSE:
+        print_shortest_path(grid, target, per_cell)

    return per_cell[target][0][1]

-    def solve(self, input: str) -> Iterator[Any]:
-        data = [[int(c) for c in r] for r in input.splitlines()]
-        estimates = self.shortest_many_paths(data)
+
+data = [[int(c) for c in r] for r in sys.stdin.read().splitlines()]
+estimates = shortest_many_paths(data)

 # part 1
-        yield self.shortest_path("answer_1", data, 1, 3, lower_bounds=estimates)
+answer_1 = shortest_path(data, 1, 3, lower_bounds=estimates)
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield self.shortest_path("answer_2", data, 4, 10, lower_bounds=estimates)
+answer_2 = shortest_path(data, 4, 10, lower_bounds=estimates)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day18.py
+++ b/src/holt59/aoc/2023/day18.py
@ -1,6 +1,5 @@
-from typing import Any, Iterator, Literal, TypeAlias, cast
-
-from ..base import BaseSolver
+import sys
+from typing import Literal, TypeAlias, cast

 Direction: TypeAlias = Literal["R", "L", "U", "D"]

@ -34,19 +33,17 @@ def polygon(values: list[tuple[Direction, int]]) -> tuple[list[tuple[int, int]],
    return corners, perimeter


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()
+

 # part 1
-        yield area(
-            *polygon(
-                [(cast(Direction, (p := line.split())[0]), int(p[1])) for line in lines]
-            )
+answer_1 = area(
+    *polygon([(cast(Direction, (p := line.split())[0]), int(p[1])) for line in lines])
 )
+print(f"answer 1 is {answer_1}")

 # part 2
-        yield area(
+answer_2 = area(
    *polygon(
        [
            (DIRECTIONS[int((h := line.split()[-1])[-2])], int(h[2:-2], 16))
@ -54,3 +51,4 @@ class Solver(BaseSolver):
        ]
    )
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day19.py
+++ b/src/holt59/aoc/2023/day19.py
@ -1,8 +1,13 @@
+import logging
 import operator
+import os
+import sys
 from math import prod
-from typing import Any, Iterator, Literal, TypeAlias, cast
+from typing import Literal, TypeAlias, cast

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)

 Category: TypeAlias = Literal["x", "m", "a", "s"]
 Part: TypeAlias = dict[Category, int]
@ -17,8 +22,7 @@ Check: TypeAlias = tuple[Category, Literal["<", ">"], int] | None
 Workflow: TypeAlias = list[tuple[Check, str]]


-class Solver(BaseSolver):
-    def accept(self, workflows: dict[str, Workflow], part: Part) -> bool:
+def accept(workflows: dict[str, Workflow], part: Part) -> bool:
    workflow = "in"
    decision: bool | None = None

@ -38,7 +42,8 @@ class Solver(BaseSolver):

    return decision

-    def propagate(self, workflows: dict[str, Workflow], start: PartWithBounds) -> int:
+
+def propagate(workflows: dict[str, Workflow], start: PartWithBounds) -> int:
    def _fmt(meta: PartWithBounds) -> str:
        return "{" + ", ".join(f"{k}={v}" for k, v in meta.items()) + "}"

@ -47,13 +52,13 @@ class Solver(BaseSolver):
    ) -> int:
        count = 0
        if target in workflows:
-                self.logger.info(f"    transfer to {target}")
+            logging.info(f"    transfer to {target}")
            queue.append((meta, target))
        elif target == "A":
            count = prod((high - low + 1) for low, high in meta.values())
-                self.logger.info(f"    accepted ({count})")
+            logging.info(f"    accepted ({count})")
        else:
-                self.logger.info("    rejected")
+            logging.info("    rejected")
        return count

    accepted = 0
@ -64,26 +69,24 @@ class Solver(BaseSolver):
    while queue:
        n_iterations += 1
        meta, workflow = queue.pop()
-            self.logger.info(f"{workflow}: {_fmt(meta)}")
+        logging.info(f"{workflow}: {_fmt(meta)}")
        for check, target in workflows[workflow]:
            if check is None:
-                    self.logger.info("  end-of-workflow")
+                logging.info("  end-of-workflow")
                accepted += transfer_or_accept(target, meta, queue)
                continue

            category, sense, value = check
            bounds, op = meta[category], OPERATORS[sense]

-                self.logger.info(
-                    f"  checking {_fmt(meta)} against {category} {sense} {value}"
-                )
+            logging.info(f"  checking {_fmt(meta)} against {category} {sense} {value}")

            if not op(bounds[0], value) and not op(bounds[1], value):
-                    self.logger.info("    reject, always false")
+                logging.info("    reject, always false")
                continue

            if op(meta[category][0], value) and op(meta[category][1], value):
-                    self.logger.info("    accept, always true")
+                logging.info("    accept, always true")
                accepted += transfer_or_accept(target, meta, queue)
                break

@ -93,15 +96,15 @@ class Solver(BaseSolver):
                meta[category], meta2[category] = (value, high), (low, value - 1)
            else:
                meta[category], meta2[category] = (low, value), (value + 1, high)
-                self.logger.info(f"    split {_fmt(meta2)} ({target}), {_fmt(meta)}")
+            logging.info(f"    split {_fmt(meta2)} ({target}), {_fmt(meta)}")

            accepted += transfer_or_accept(target, meta2, queue)

-        self.logger.info(f"run took {n_iterations} iterations")
+    logging.info(f"run took {n_iterations} iterations")
    return accepted

-    def solve(self, input: str) -> Iterator[Any]:
-        workflows_s, parts_s = input.split("\n\n")
+
+workflows_s, parts_s = sys.stdin.read().strip().split("\n\n")

 workflows: dict[str, Workflow] = {}
 for workflow_s in workflows_s.split("\n"):
@ -126,9 +129,12 @@ class Solver(BaseSolver):
    {cast(Category, s[0]): int(s[2:]) for s in part_s[1:-1].split(",")}
    for part_s in parts_s.split("\n")
 ]
-        yield sum(sum(part.values()) for part in parts if self.accept(workflows, part))
+answer_1 = sum(sum(part.values()) for part in parts if accept(workflows, part))
+print(f"answer 1 is {answer_1}")
+

 # part 2
-        yield self.propagate(
+answer_2 = propagate(
    workflows, {cast(Category, c): (1, 4000) for c in ["x", "m", "a", "s"]}
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day2.py
+++ b/src/holt59/aoc/2023/day2.py
@ -1,16 +1,13 @@
 import math
-from typing import Any, Iterator, Literal, TypeAlias, cast
-
-from ..base import BaseSolver
+import sys
+from typing import Literal, TypeAlias, cast

 CubeType: TypeAlias = Literal["red", "blue", "green"]

 MAX_CUBES: dict[CubeType, int] = {"red": 12, "green": 13, "blue": 14}

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+# parse games
+lines = sys.stdin.read().splitlines()
 games: dict[int, list[dict[CubeType, int]]] = {}
 for line in filter(bool, lines):
    id_part, sets_part = line.split(":")
@ -24,7 +21,8 @@ class Solver(BaseSolver):
        for cube_set_s in sets_part.strip().split(";")
    ]

-        yield sum(
+# part 1
+answer_1 = sum(
    id
    for id, set_of_cubes in games.items()
    if all(
@ -33,11 +31,13 @@ class Solver(BaseSolver):
        for cube, n_cubes in cube_set.items()
    )
 )
+print(f"answer 1 is {answer_1}")

-        yield sum(
+# part 2
+answer_2 = sum(
    math.prod(
-                max(cube_set.get(cube, 0) for cube_set in set_of_cubes)
-                for cube in MAX_CUBES
+        max(cube_set.get(cube, 0) for cube_set in set_of_cubes) for cube in MAX_CUBES
    )
    for set_of_cubes in games.values()
 )
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day20.py
+++ b/src/holt59/aoc/2023/day20.py
@ -1,41 +1,55 @@
+import logging
+import os
+import sys
 from collections import defaultdict
 from math import lcm
-from typing import Any, Iterator, Literal, TypeAlias
+from typing import Literal, TypeAlias
+
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)

-from ..base import BaseSolver

 ModuleType: TypeAlias = Literal["broadcaster", "conjunction", "flip-flop"]
 PulseType: TypeAlias = Literal["high", "low"]

+modules: dict[str, tuple[ModuleType, list[str]]] = {}

-class Solver(BaseSolver):
-    _modules: dict[str, tuple[ModuleType, list[str]]]
+lines = sys.stdin.read().splitlines()

-    def _process(
-        self,
+for line in lines:
+    name, outputs_s = line.split(" -> ")
+    outputs = outputs_s.split(", ")
+    if name == "broadcaster":
+        modules["broadcaster"] = ("broadcaster", outputs)
+    else:
+        modules[name[1:]] = (
+            "conjunction" if name.startswith("&") else "flip-flop",
+            outputs,
+        )
+
+
+def process(
    start: tuple[str, str, PulseType],
    flip_flop_states: dict[str, Literal["on", "off"]],
    conjunction_states: dict[str, dict[str, PulseType]],
 ) -> tuple[dict[PulseType, int], dict[str, dict[PulseType, int]]]:
    pulses: list[tuple[str, str, PulseType]] = [start]
    counts: dict[PulseType, int] = {"low": 0, "high": 0}
-        inputs: dict[str, dict[PulseType, int]] = defaultdict(
-            lambda: {"low": 0, "high": 0}
-        )
+    inputs: dict[str, dict[PulseType, int]] = defaultdict(lambda: {"low": 0, "high": 0})

-        self.logger.info("starting process... ")
+    logging.info("starting process... ")

    while pulses:
        input, name, pulse = pulses.pop(0)
-            self.logger.info(f"{input} -{pulse}-> {name}")
+        logging.info(f"{input} -{pulse}-> {name}")
        counts[pulse] += 1

        inputs[name][pulse] += 1

-            if name not in self._modules:
+        if name not in modules:
            continue

-            type, outputs = self._modules[name]
+        type, outputs = modules[name]

        if type == "broadcaster":
            ...
@ -63,63 +77,41 @@ class Solver(BaseSolver):

    return counts, inputs

-    def solve(self, input: str) -> Iterator[Any]:
-        self._modules = {}

-        lines = input.splitlines()
-
-        for line in lines:
-            name, outputs_s = line.split(" -> ")
-            outputs = outputs_s.split(", ")
-            if name == "broadcaster":
-                self._modules["broadcaster"] = ("broadcaster", outputs)
-            else:
-                self._modules[name[1:]] = (
-                    "conjunction" if name.startswith("&") else "flip-flop",
-                    outputs,
-                )
-
-        if self.files:
-            contents = "digraph G {\n"
-            contents += "rx [shape=circle, color=red, style=filled];\n"
-            for name, (type, outputs) in self._modules.items():
+with open("./day20.dot", "w") as fp:
+    fp.write("digraph G {\n")
+    fp.write("rx [shape=circle, color=red, style=filled];\n")
+    for name, (type, outputs) in modules.items():
        if type == "conjunction":
            shape = "diamond"
        elif type == "flip-flop":
            shape = "box"
        else:
            shape = "circle"
-                contents += f"{name} [shape={shape}];\n"
-            for name, (type, outputs) in self._modules.items():
+        fp.write(f"{name} [shape={shape}];\n")
+    for name, (type, outputs) in modules.items():
        for output in outputs:
-                    contents += f"{name} -> {output};\n"
-            contents += "}\n"
-
-            self.files.create("day20.dot", contents.encode(), False)
+            fp.write(f"{name} -> {output};\n")
+    fp.write("}\n")

 # part 1
 flip_flop_states: dict[str, Literal["on", "off"]] = {
-            name: "off"
-            for name, (type, _) in self._modules.items()
-            if type == "flip-flop"
+    name: "off" for name, (type, _) in modules.items() if type == "flip-flop"
 }
 conjunction_states: dict[str, dict[str, PulseType]] = {
-            name: {
-                input: "low"
-                for input, (_, outputs) in self._modules.items()
-                if name in outputs
-            }
-            for name, (type, _) in self._modules.items()
+    name: {input: "low" for input, (_, outputs) in modules.items() if name in outputs}
+    for name, (type, _) in modules.items()
    if type == "conjunction"
 }
 counts: dict[PulseType, int] = {"low": 0, "high": 0}
 for _ in range(1000):
-            result, _ = self._process(
+    result, _ = process(
        ("button", "broadcaster", "low"), flip_flop_states, conjunction_states
    )
    for pulse in ("low", "high"):
        counts[pulse] += result[pulse]
-        yield counts["low"] * counts["high"]
+answer_1 = counts["low"] * counts["high"]
+print(f"answer 1 is {answer_1}")

 # part 2

@ -132,27 +124,23 @@ class Solver(BaseSolver):
        conjunction_states[name][input] = "low"

 # find the conjunction connected to rx
-        to_rx = [
-            name for name, (_, outputs) in self._modules.items() if "rx" in outputs
-        ]
+to_rx = [name for name, (_, outputs) in modules.items() if "rx" in outputs]
 assert len(to_rx) == 1, "cannot handle multiple module inputs for rx"
 assert (
-            self._modules[to_rx[0]][0] == "conjunction"
+    modules[to_rx[0]][0] == "conjunction"
 ), "can only handle conjunction as input to rx"

-        to_rx_inputs = [
-            name for name, (_, outputs) in self._modules.items() if to_rx[0] in outputs
-        ]
+to_rx_inputs = [name for name, (_, outputs) in modules.items() if to_rx[0] in outputs]
 assert all(
-            self._modules[i][0] == "conjunction" and len(self._modules[i][1]) == 1
-            for i in to_rx_inputs
+    modules[i][0] == "conjunction" and len(modules[i][1]) == 1 for i in to_rx_inputs
 ), "can only handle inversion as second-order inputs to rx"

+
 count = 1
 cycles: dict[str, int] = {}
 second: dict[str, int] = {}
 while len(second) != len(to_rx_inputs):
-            _, inputs = self._process(
+    _, inputs = process(
        ("button", "broadcaster", "low"), flip_flop_states, conjunction_states
    )

@ -169,4 +157,5 @@ class Solver(BaseSolver):
    second[k] == cycles[k] * 2 for k in to_rx_inputs
 ), "cannot only handle cycles starting at the beginning"

-        yield lcm(*cycles.values())
+answer_2 = lcm(*cycles.values())
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day21.py
+++ b/src/holt59/aoc/2023/day21.py
@ -1,6 +1,9 @@
-from typing import Any, Iterator
+import logging
+import os
+import sys

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)


 def reachable(
@ -18,29 +21,25 @@ def reachable(
    return tiles


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        map = input.splitlines()
+map = sys.stdin.read().splitlines()
 start = next(
-            (i, j)
-            for i in range(len(map))
-            for j in range(len(map[i]))
-            if map[i][j] == "S"
+    (i, j) for i in range(len(map)) for j in range(len(map[i])) if map[i][j] == "S"
 )

 # part 1
-        yield len(reachable(map, {start}, 6 if len(map) < 20 else 64))
+answer_1 = len(reachable(map, {start}, 6 if len(map) < 20 else 64))
+print(f"answer 1 is {answer_1}")

 # part 2

-        # the initial map is a square and contains an empty rhombus whose diameter is
-        # the size of the map, and has only empty cells around the middle row and column
+# the initial map is a square and contains an empty rhombus whose diameter is the size
+# of the map, and has only empty cells around the middle row and column
 #
-        # after ~n/2 steps, the first map is filled with a rhombus, after that we get a
-        # bigger rhombus every n steps
+# after ~n/2 steps, the first map is filled with a rhombus, after that we get a bigger
+# rhombus every n steps
 #
-        # we are going to find the number of cells reached for the initial rhombus, n
-        # steps after and n * 2 steps after
+# we are going to find the number of cells reached for the initial rhombus, n steps
+# after and n * 2 steps after
 #
 cycle = len(map)
 rhombus = (len(map) - 3) // 2 + 1
@ -50,7 +49,7 @@ class Solver(BaseSolver):
 values.append(len(tiles := reachable(map, tiles, cycle)))
 values.append(len(tiles := reachable(map, tiles, cycle)))

-        if self.files:
+if logging.root.getEffectiveLevel() == logging.INFO:
    n_rows, n_cols = len(map), len(map[0])

    rows = [
@ -66,11 +65,10 @@ class Solver(BaseSolver):
            if (i // cycle) % 2 == (j // cycle) % 2:
                rows[i][j] = f"\033[91m{rows[i][j]}\033[0m"

-            self.files.create(
-                "cycle.txt", "\n".join("".join(row) for row in rows).encode(), True
-            )
+    print("\n".join("".join(row) for row in rows))

-        self.logger.info(f"values to fit: {values}")
+
+logging.info(f"values to fit: {values}")

 # version 1:
 #
@ -102,31 +100,31 @@ class Solver(BaseSolver):
 # depending on the number of cycles, either A or B will be in the center
 #

-        # counts = [
-        #     [
-        #         sum(
-        #             (i, j) in tiles
-        #             for i in range(ci * cycle, (ci + 1) * cycle)
-        #             for j in range(cj * cycle, (cj + 1) * cycle)
-        #         )
-        #         for cj in range(-2, 3)
-        #     ]
-        #     for ci in range(-2, 3)
-        # ]
+counts = [
+    [
+        sum(
+            (i, j) in tiles
+            for i in range(ci * cycle, (ci + 1) * cycle)
+            for j in range(cj * cycle, (cj + 1) * cycle)
+        )
+        for cj in range(-2, 3)
+    ]
+    for ci in range(-2, 3)
+]

-        # radius = (26501365 - rhombus) // cycle - 1
-        # A = counts[2][2] if radius % 2 == 0 else counts[2][1]
-        # B = counts[2][2] if radius % 2 == 1 else counts[2][1]
-        # answer_2 = (
-        #     (radius + 1) * A
-        #     + radius * B
-        #     + 2 * radius * (radius + 1) // 2 * A
-        #     + 2 * radius * (radius - 1) // 2 * B
-        #     + sum(counts[i][j] for i, j in ((0, 2), (-1, 2), (2, 0), (2, -1)))
-        #     + sum(counts[i][j] for i, j in ((0, 1), (0, 3), (-1, 1), (-1, 3)))
-        #     * (radius + 1)
-        #     + sum(counts[i][j] for i, j in ((1, 1), (1, 3), (-2, 1), (-2, 3))) * radius
-        # )
+radius = (26501365 - rhombus) // cycle - 1
+A = counts[2][2] if radius % 2 == 0 else counts[2][1]
+B = counts[2][2] if radius % 2 == 1 else counts[2][1]
+answer_2 = (
+    (radius + 1) * A
+    + radius * B
+    + 2 * radius * (radius + 1) // 2 * A
+    + 2 * radius * (radius - 1) // 2 * B
+    + sum(counts[i][j] for i, j in ((0, 2), (-1, 2), (2, 0), (2, -1)))
+    + sum(counts[i][j] for i, j in ((0, 1), (0, 3), (-1, 1), (-1, 3))) * (radius + 1)
+    + sum(counts[i][j] for i, j in ((1, 1), (1, 3), (-2, 1), (-2, 3))) * radius
+)
+print(f"answer 2 (v1) is {answer_2}")

 # version 2: fitting a polynomial
 #
@ -147,4 +145,5 @@ class Solver(BaseSolver):
 a, b, c = (y1 + y3) // 2 - y2, 2 * y2 - (3 * y1 + y3) // 2, y1

 n = (26501365 - rhombus) // cycle
-        yield a * n * n + b * n + c
+answer_2 = a * n * n + b * n + c
+print(f"answer 2 (v2) is {answer_2}")
--- a/src/holt59/aoc/2023/day22.py
+++ b/src/holt59/aoc/2023/day22.py
@ -1,20 +1,23 @@
 import itertools
+import logging
+import os
 import string
+import sys
 from collections import defaultdict
-from typing import Any, Iterator

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()
+

 def _name(i: int) -> str:
    if len(lines) < 26:
        return string.ascii_uppercase[i]
    return f"B{i:04d}"

+
 def build_supports(
    bricks: list[tuple[tuple[int, int, int], tuple[int, int, int]]],
 ) -> tuple[dict[int, set[int]], dict[int, set[int]]]:
@ -39,9 +42,7 @@ class Solver(BaseSolver):

    # 2. compute the bricks that supports any brick
    supported_by: dict[int, set[int]] = {}
-            supports: dict[int, set[int]] = {
-                i_brick: set() for i_brick in range(len(bricks))
-            }
+    supports: dict[int, set[int]] = {i_brick: set() for i_brick in range(len(bricks))}
    for i_brick, ((sx, sy, sz), (ex, ey, ez)) in enumerate(bricks):
        name = _name(i_brick)

@ -50,7 +51,7 @@ class Solver(BaseSolver):
            for x, y in itertools.product(range(sx, ex + 1), range(sy, ey + 1))
            if (v := levels[x, y, sz - 1]) != -1
        }
-                self.logger.info(
+        logging.info(
            f"{name} supported by {', '.join(map(_name, supported_by[i_brick]))}"
        )

@ -59,6 +60,7 @@ class Solver(BaseSolver):

    return supported_by, supports

+
 bricks: list[tuple[tuple[int, int, int], tuple[int, int, int]]] = []
 for line in lines:
    bricks.append(
@ -73,10 +75,11 @@ class Solver(BaseSolver):
 supported_by, supports = build_supports(bricks)

 # part 1
-        yield len(bricks) - sum(
+answer_1 = len(bricks) - sum(
    any(len(supported_by[supported]) == 1 for supported in supports_to)
    for supports_to in supports.values()
 )
+print(f"answer 1 is {answer_1}")

 # part 2
 falling_in_chain: dict[int, set[int]] = {}
@ -97,13 +100,12 @@ class Solver(BaseSolver):

        for d_brick in to_disintegrate:
            for supported in supports[d_brick]:
-                        supported_by_copy[supported] = supported_by_copy[supported] - {
-                            d_brick
-                        }
+                supported_by_copy[supported] = supported_by_copy[supported] - {d_brick}

                if not supported_by_copy[supported]:
                    to_disintegrate_v.add(supported)

        to_disintegrate = to_disintegrate_v

-        yield sum(len(falling) for falling in falling_in_chain.values())
+answer_2 = sum(len(falling) for falling in falling_in_chain.values())
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day23.py
+++ b/src/holt59/aoc/2023/day23.py
@ -1,7 +1,11 @@
+import logging
+import os
+import sys
 from collections import defaultdict
-from typing import Any, Iterator, Literal, Sequence, TypeAlias, cast
+from typing import Literal, Sequence, TypeAlias, cast

-from ..base import BaseSolver
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+logging.basicConfig(level=logging.INFO if VERBOSE else logging.WARNING)

 DirectionType: TypeAlias = Literal[">", "<", "^", "v", ".", "#"]

@ -31,7 +35,6 @@ def neighbors(
    Compute neighbors of the given node, ignoring the given set of nodes and considering
    that you can go uphill on slopes.
    """
-    n_rows, n_cols = len(grid), len(grid[0])
    i, j = node

    for di, dj in Neighbors[grid[i][j]]:
@ -100,9 +103,7 @@ def compute_direct_links(
    return direct


-class Solver(BaseSolver):
 def longest_path_length(
-        self,
    links: dict[tuple[int, int], list[tuple[tuple[int, int], int]]],
    start: tuple[int, int],
    target: tuple[int, int],
@ -128,29 +129,29 @@ class Solver(BaseSolver):
            if reach not in path
        )

-        self.logger.info(f"processed {nodes} nodes")
+    logging.info(f"processed {nodes} nodes")

    return max_distance

-    def solve(self, input: str) -> Iterator[Any]:
-        lines = cast(list[Sequence[DirectionType]], input.splitlines())

+lines = cast(list[Sequence[DirectionType]], sys.stdin.read().splitlines())
+n_rows, n_cols = len(lines), len(lines[0])
 start = (0, 1)
 target = (len(lines) - 1, len(lines[0]) - 2)

+
 direct_links: dict[tuple[int, int], list[tuple[tuple[int, int], int]]] = {
    start: [reachable(lines, start, target)]
 }
-        direct_links.update(
-            compute_direct_links(lines, direct_links[start][0][0], target)
-        )
+direct_links.update(compute_direct_links(lines, direct_links[start][0][0], target))

 # part 1
-        yield self.longest_path_length(direct_links, start, target)
+answer_1 = longest_path_length(direct_links, start, target)
+print(f"answer 1 is {answer_1}")

 # part 2
-        reverse_links: dict[tuple[int, int], list[tuple[tuple[int, int], int]]] = (
-            defaultdict(list)
+reverse_links: dict[tuple[int, int], list[tuple[tuple[int, int], int]]] = defaultdict(
+    list
 )
 for origin, links in direct_links.items():
    for destination, distance in links:
@ -162,4 +163,5 @@ class Solver(BaseSolver):
    for k in direct_links.keys() | reverse_links.keys()
 }

-        yield self.longest_path_length(links, start, target)
+answer_2 = longest_path_length(links, start, target)
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day24.py
+++ b/src/holt59/aoc/2023/day24.py
@ -1,14 +1,9 @@
-from typing import Any, Iterator
+import sys

 import numpy as np
 from sympy import solve, symbols

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 positions = np.array(
    [[int(c) for c in line.split("@")[0].strip().split(", ")] for line in lines]
@ -18,9 +13,7 @@ class Solver(BaseSolver):
 )

 # part 1
-        low, high = (
-            [7, 27] if len(positions) <= 10 else [200000000000000, 400000000000000]
-        )
+low, high = [7, 27] if len(positions) <= 10 else [200000000000000, 400000000000000]

 count = 0
 for i1, (p1, v1) in enumerate(zip(positions, velocities)):
@ -38,7 +31,9 @@ class Solver(BaseSolver):
    c = p + np.expand_dims(t, 1) * r
    count += np.all((low <= c) & (c <= high), axis=1).sum()

-        yield count
+
+answer_1 = count
+print(f"answer 1 is {answer_1}")

 # part 2
 # equation
@ -59,11 +54,10 @@ class Solver(BaseSolver):
 )
 equations = []
 for i1, ti in zip(range(n), ts):
-            for p, d, pi, di in zip(
-                (x, y, z), (vx, vy, vz), positions[i1], velocities[i1]
-            ):
+    for p, d, pi, di in zip((x, y, z), (vx, vy, vz), positions[i1], velocities[i1]):
        equations.append(p + ti * d - pi - ti * di)
-        print(equations)

 r = solve(equations, [x, y, z, vx, vy, vz] + list(ts), dict=True)[0]
-        yield r[x] + r[y] + r[z]
+
+answer_2 = r[x] + r[y] + r[z]
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day25.py
+++ b/src/holt59/aoc/2023/day25.py
@ -1,19 +1,14 @@
-# pyright: reportUnknownMemberType=false
-
-from typing import Any, Iterator
+import sys

 import networkx as nx

-from ..base import BaseSolver
-
-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
 components = {
-            (p := line.split(": "))[0]: p[1].split() for line in input.splitlines()
+    (p := line.split(": "))[0]: p[1].split() for line in sys.stdin.read().splitlines()
 }

-        graph: "nx.Graph[str]" = nx.Graph()
+targets = {t for c in components for t in components[c] if t not in components}
+
+graph = nx.Graph()
 graph.add_edges_from((u, v) for u, vs in components.items() for v in vs)

 cut = nx.minimum_edge_cut(graph)
@ -22,4 +17,9 @@ class Solver(BaseSolver):
 c1, c2 = nx.connected_components(graph)

 # part 1
-        yield len(c1) * len(c2)
+answer_1 = len(c1) * len(c2)
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day3.py
+++ b/src/holt59/aoc/2023/day3.py
@ -1,15 +1,10 @@
 import string
+import sys
 from collections import defaultdict
-from typing import Any, Iterator
-
-from ..base import BaseSolver

 NOT_A_SYMBOL = "." + string.digits

-
-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 values: list[int] = []
 gears: dict[tuple[int, int], list[int]] = defaultdict(list)
@ -49,5 +44,10 @@ class Solver(BaseSolver):
        # continue starting from the end of the number
        j = k

-        yield sum(values)
-        yield sum(v1 * v2 for v1, v2 in filter(lambda vs: len(vs) == 2, gears.values()))
+# part 1
+answer_1 = sum(values)
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = sum(v1 * v2 for v1, v2 in filter(lambda vs: len(vs) == 2, gears.values()))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day4.py
+++ b/src/holt59/aoc/2023/day4.py
@ -1,7 +1,5 @@
+import sys
 from dataclasses import dataclass
-from typing import Any, Iterator
-
-from ..base import BaseSolver


@dataclass(frozen=True)
@ -11,9 +9,7 @@ class Card:
    values: list[int]


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 cards: list[Card] = []
 for line in lines:
@ -30,7 +26,8 @@ class Solver(BaseSolver):
 winnings = [sum(1 for n in card.values if n in card.numbers) for card in cards]

 # part 1
-        yield sum(2 ** (winning - 1) for winning in winnings if winning > 0)
+answer_1 = sum(2 ** (winning - 1) for winning in winnings if winning > 0)
+print(f"answer 1 is {answer_1}")

 # part 2
 card2cards = {i: list(range(i + 1, i + w + 1)) for i, w in enumerate(winnings)}
@ -41,4 +38,4 @@ class Solver(BaseSolver):
    for j in card2cards[i]:
        card2values[j] += card2values[i]

-        yield sum(card2values.values())
+print(f"answer 2 is {sum(card2values.values())}")
--- a/src/holt59/aoc/2023/day5.py
+++ b/src/holt59/aoc/2023/day5.py
@ -1,6 +1,5 @@
-from typing import Any, Iterator, Sequence
-
-from ..base import BaseSolver
+import sys
+from typing import Sequence

 MAP_ORDER = [
    "seed",
@ -13,6 +12,55 @@ MAP_ORDER = [
    "location",
 ]

+lines = sys.stdin.read().splitlines()
+
+# mappings from one category to another, each list contains
+# ranges stored as (source, target, length), ordered by start and
+# completed to have no "hole"
+maps: dict[tuple[str, str], list[tuple[int, int, int]]] = {}
+
+# parsing
+index = 2
+while index < len(lines):
+    p1, _, p2 = lines[index].split()[0].split("-")
+
+    # extract the existing ranges from the file - we store as (source, target, length)
+    # whereas the file is in order (target, source, length)
+    index += 1
+    values: list[tuple[int, int, int]] = []
+    while index < len(lines) and lines[index]:
+        n1, n2, n3 = lines[index].split()
+        values.append((int(n2), int(n1), int(n3)))
+        index += 1
+
+    # sort by source value
+    values.sort()
+
+    # add a 'fake' interval starting at 0 if missing
+    if values[0][0] != 0:
+        values.insert(0, (0, 0, values[0][0]))
+
+    # fill gaps between intervals
+    for i in range(len(values) - 1):
+        next_start = values[i + 1][0]
+        end = values[i][0] + values[i][2]
+        if next_start != end:
+            values.insert(
+                i + 1,
+                (end, end, next_start - end),
+            )
+
+    # add an interval covering values up to at least 2**32 at the end
+    last_start, _, last_length = values[-1]
+    values.append((last_start + last_length, last_start + last_length, 2**32))
+
+    assert all(v1[0] + v1[2] == v2[0] for v1, v2 in zip(values[:-1], values[1:]))
+    assert values[0][0] == 0
+    assert values[-1][0] + values[-1][-1] >= 2**32
+
+    maps[p1, p2] = values
+    index += 1
+

 def find_range(
    values: tuple[int, int], map: list[tuple[int, int, int]]
@ -63,71 +111,19 @@ def find_range(
    return ranges


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
-
-        # mappings from one category to another, each list contains
-        # ranges stored as (source, target, length), ordered by start and
-        # completed to have no "hole"
-        maps: dict[tuple[str, str], list[tuple[int, int, int]]] = {}
-
-        def find_location_ranges(
-            seeds: Sequence[tuple[int, int]],
-        ) -> Sequence[tuple[int, int]]:
+def find_location_ranges(seeds: Sequence[tuple[int, int]]) -> Sequence[tuple[int, int]]:
    for map1, map2 in zip(MAP_ORDER[:-1], MAP_ORDER[1:]):
        seeds = [s2 for s1 in seeds for s2 in find_range(s1, maps[map1, map2])]
    return seeds

-        # parsing
-        index = 2
-        while index < len(lines):
-            p1, _, p2 = lines[index].split()[0].split("-")
-
-            # extract the existing ranges from the file - we store as (source, target, length)
-            # whereas the file is in order (target, source, length)
-            index += 1
-            values: list[tuple[int, int, int]] = []
-            while index < len(lines) and lines[index]:
-                n1, n2, n3 = lines[index].split()
-                values.append((int(n2), int(n1), int(n3)))
-                index += 1
-
-            # sort by source value
-            values.sort()
-
-            # add a 'fake' interval starting at 0 if missing
-            if values[0][0] != 0:
-                values.insert(0, (0, 0, values[0][0]))
-
-            # fill gaps between intervals
-            for i in range(len(values) - 1):
-                next_start = values[i + 1][0]
-                end = values[i][0] + values[i][2]
-                if next_start != end:
-                    values.insert(
-                        i + 1,
-                        (end, end, next_start - end),
-                    )
-
-            # add an interval covering values up to at least 2**32 at the end
-            last_start, _, last_length = values[-1]
-            values.append((last_start + last_length, last_start + last_length, 2**32))
-
-            assert all(
-                v1[0] + v1[2] == v2[0] for v1, v2 in zip(values[:-1], values[1:])
-            )
-            assert values[0][0] == 0
-            assert values[-1][0] + values[-1][-1] >= 2**32
-
-            maps[p1, p2] = values
-            index += 1

 # part 1 - use find_range() with range of length 1
 seeds_p1 = [(int(s), 1) for s in lines[0].split(":")[1].strip().split()]
-        yield min(start for start, _ in find_location_ranges(seeds_p1))
+answer_1 = min(start for start, _ in find_location_ranges(seeds_p1))
+print(f"answer 1 is {answer_1}")

 # # part 2
 parts = lines[0].split(":")[1].strip().split()
 seeds_p2 = [(int(s), int(e)) for s, e in zip(parts[::2], parts[1::2])]
-        yield min(start for start, _ in find_location_ranges(seeds_p2))
+answer_2 = min(start for start, _ in find_location_ranges(seeds_p2))
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day6.py
+++ b/src/holt59/aoc/2023/day6.py
@ -1,7 +1,5 @@
 import math
-from typing import Any, Iterator
-
-from ..base import BaseSolver
+import sys


 def extreme_times_to_beat(time: int, distance: int) -> tuple[int, int]:
@ -27,23 +25,23 @@ def extreme_times_to_beat(time: int, distance: int) -> tuple[int, int]:
    return t1, t2


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()

 # part 1
 times = list(map(int, lines[0].split()[1:]))
 distances = list(map(int, lines[1].split()[1:]))
-        yield math.prod(
+answer_1 = math.prod(
    t2 - t1 + 1
    for t1, t2 in (
        extreme_times_to_beat(time, distance)
        for time, distance in zip(times, distances)
    )
 )
+print(f"answer 1 is {answer_1}")

 # part 2
 time = int(lines[0].split(":")[1].strip().replace(" ", ""))
 distance = int(lines[1].split(":")[1].strip().replace(" ", ""))
 t1, t2 = extreme_times_to_beat(time, distance)
-        yield t2 - t1 + 1
+answer_2 = t2 - t1 + 1
+print(f"answer 2 is {answer_2}")
--- a/src/holt59/aoc/2023/day7.py
+++ b/src/holt59/aoc/2023/day7.py
@ -1,7 +1,5 @@
+import sys
 from collections import Counter, defaultdict
-from typing import Any, Iterator
-
-from ..base import BaseSolver


 class HandTypes:
@ -34,17 +32,18 @@ def extract_key(hand: str, values: dict[str, int], joker: str = "0") -> tuple[in
    )


-class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]:
-        lines = input.splitlines()
+lines = sys.stdin.read().splitlines()
 cards = [(t[0], int(t[1])) for line in lines if (t := line.split())]

+
 # part 1
 values = {card: value for value, card in enumerate("23456789TJQKA")}
 cards.sort(key=lambda cv: extract_key(cv[0], values=values))
-        yield sum(rank * value for rank, (_, value) in enumerate(cards, start=1))
+answer_1 = sum(rank * value for rank, (_, value) in enumerate(cards, start=1))
+print(f"answer 1 is {answer_1}")

 # part 2
 values = {card: value for value, card in enumerate("J23456789TQKA")}
 cards.sort(key=lambda cv: extract_key(cv[0], values=values, joker="J"))
-        yield sum(rank * value for rank, (_, value) in enumerate(cards, start=1))
+answer_2 = sum(rank * value for rank, (_, value) in enumerate(cards, start=1))
+print(f"answer 2 is {answer_2}")
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Mikaël Capelle	f1cd7e6c85	2024 day 4. All checks were successful continuous-integration/drone/push Build is passing Details	2024-12-04 07:35:22 +01:00
Mikael CAPELLE	d16ee7f9ad	Refactor 2024 day 3. All checks were successful continuous-integration/drone/push Build is passing Details	2024-12-03 15:22:54 +01:00
Mikaël Capelle	0c46d3ed18	Add .drone.yml for CI. (#2 ) All checks were successful continuous-integration/drone/push Build is passing Details	2024-12-03 13:38:03 +00:00
Mikael CAPELLE	acb767184e	Fix linting.	2024-12-03 14:11:29 +01:00
Mikael CAPELLE	cb0145baa2	2024 day 3.	2024-12-03 08:29:25 +01:00
Mikaël Capelle	a4ad0259a9	Fix 2024 day 2.	2024-12-02 18:44:50 +01:00
Mikael CAPELLE	82452c0751	Update Python dependencies.	2024-12-02 17:08:50 +01:00
Mikael CAPELLE	79cc208875	2024 day 2.	2024-12-02 15:42:56 +01:00
Mikaël Capelle	4dd2d5d9c9	2024 day 1.	2024-12-01 10:26:02 +01:00
Mikaël Capelle	def4305c1c	2015 day 22, part 1.	2024-12-01 10:25:49 +01:00
Mikaël Capelle	3edaa249fc	2015 day 21.	2024-01-20 17:57:37 +01:00
Mikaël Capelle	57fcb47fe9	2015 day 20.	2024-01-06 22:07:34 +01:00
Mikaël Capelle	cfa7718475	2015 day 19.	2024-01-06 21:35:48 +01:00
Mikaël Capelle	2d23e355b2	2015 day 18.	2024-01-06 16:43:35 +01:00
Mikaël Capelle	fab4899715	2015 day 17.	2024-01-06 15:46:43 +01:00
Mikaël Capelle	b6e20eefa3	2015 day 16.	2024-01-06 15:27:45 +01:00
Mikaël Capelle	872fd72dcd	2015 day 15.	2024-01-06 15:11:47 +01:00
Mikaël Capelle	98f28e96f8	2015 day 12, 13 & 14.	2024-01-06 14:56:30 +01:00
Mikaël Capelle	ed7aba80ad	2015 day 11.	2024-01-06 11:46:59 +01:00
Mikaël Capelle	e507dad5e0	2015 day 10.	2024-01-06 11:30:10 +01:00
Mikael CAPELLE	04172beb5a	2015 day 9.	2024-01-05 14:46:05 +01:00
Mikael CAPELLE	15ef67e757	2015 day 8.	2024-01-05 10:01:02 +01:00
Mikaël Capelle	cd0ada785c	2015 day 4, 5, 6, 7.	2024-01-04 21:05:42 +01:00
Mikael CAPELLE	42bd8d6983	2015 day 3.	2024-01-04 18:36:30 +01:00
Mikael CAPELLE	0567ab7440	2015 day 1 & 2.	2024-01-04 18:27:17 +01:00
Mikaël Capelle	7d2eb6b5ec	Faster 2023 day 24 (part 1).	2024-01-01 18:44:13 +01:00
Mikaël Capelle	3a9c7e728b	Minor cleaning 2023.	2023-12-30 19:35:06 +01:00
Mikaël Capelle	d002e419c3	2023 day 25.	2023-12-25 10:36:36 +01:00
Mikaël Capelle	19d93e0c1d	2023 day 24.	2023-12-25 10:36:29 +01:00
Mikaël Capelle	5c05ee5c85	2023 day 23.	2023-12-23 11:05:35 +01:00
Mikaël Capelle	103af21915	2021 day 9.	2023-12-22 21:26:13 +01:00
Mikaël Capelle	af2fbf2da1	2023 day 22.	2023-12-22 14:49:31 +01:00
Mikaël Capelle	c496ea25c9	2023 day 21, version 2.	2023-12-21 21:56:38 +01:00
Mikael CAPELLE	5f8c74fd1c	2023 day 21.	2023-12-21 16:47:43 +01:00
Mikael CAPELLE	dda2be2505	2023 day 20.	2023-12-20 14:27:25 +01:00
Mikael CAPELLE	12891194bb	Poetry stuff.	2023-12-19 17:45:33 +01:00
Mikaël Capelle	f15908876d	2023 day 19.	2023-12-19 10:41:53 +01:00
Mikael CAPELLE	5f5ebda674	2023 day 18.	2023-12-18 11:40:32 +01:00
Mikaël Capelle	5b30cc00d5	2023 day 17.	2023-12-17 18:19:49 +01:00
Mikaël Capelle	3a7f8e83dc	2023 day 16.	2023-12-16 18:33:11 +01:00
Mikaël Capelle	ba5b01c594	2023 day 15.	2023-12-15 16:18:21 +01:00
Mikaël Capelle	d0970c090b	2023 day 14.	2023-12-14 19:34:38 +01:00
Mikaël Capelle	8e90bf7002	2023 day 13.	2023-12-13 20:05:05 +01:00
Mikaël Capelle	9698dfcdac	2023 day 12.	2023-12-12 20:20:26 +00:00
Mikaël Capelle	1a6ab1cc0e	2023 day 11.	2023-12-11 10:25:56 +01:00
Mikaël Capelle	f5aabbee8f	2021 day 8.	2023-12-10 20:23:22 +01:00
Mikaël Capelle	6c00341ab0	2023 day 10.	2023-12-10 10:09:12 +01:00
Mikaël Capelle	755e0bd4b3	2021 day 7.	2023-12-09 12:52:46 +01:00
Mikaël Capelle	a52d077a40	2021 day 6.	2023-12-09 12:36:10 +01:00
Mikaël Capelle	3fc0f94b1c	2021 day 1-5.	2023-12-09 11:01:28 +01:00
Mikaël Capelle	8a0412f926	Clean 2022.	2023-12-09 09:54:53 +01:00
Mikaël Capelle	855efeb0aa	2023 day 9.	2023-12-09 08:08:46 +01:00
Mikaël Capelle	f2a65e03e5	2023 day 8.	2023-12-08 08:44:03 +01:00
Mikaël Capelle	759f47bfab	2023 day 7.	2023-12-08 08:38:08 +01:00
Mikael CAPELLE	999207b007	Clean 2023.	2023-12-06 08:47:59 +01:00
Mikaël Capelle	d92e4744a4	2023 day 6.	2023-12-06 07:14:26 +01:00
Mikael CAPELLE	8dbf0f101c	2023 day 5.	2023-12-05 13:41:17 +01:00
Mikaël Capelle	b8d8df06d6	2023 day 5 part 1.	2023-12-05 07:22:56 +01:00
Mikaël Capelle	825ebea299	Prepare 2023 days.	2023-12-04 19:32:41 +01:00
Mikaël Capelle	869cd4477f	2023 day 4.	2023-12-04 19:30:44 +01:00
Mikaël Capelle	fd777627d6	2023 day 3.	2023-12-03 09:09:25 +01:00
Mikaël Capelle	98f605f30e	2023 day 2.	2023-12-02 09:47:52 +01:00
Mikaël Capelle	d51fed283c	Fix 2023 day 1.	2023-12-01 20:27:42 +01:00
Mikael CAPELLE	e991cd8b04	2023: Day 1.	2023-12-01 10:41:13 +01:00
Mikael CAPELLE	10f67e6bfd	Post-christmas cleaning.	2023-01-06 13:48:18 +01:00
Mikaël Capelle	f291b0aa3f	Day 25.	2022-12-25 11:34:49 +01:00
Mikaël Capelle	0eb5b5a88f	Faster day 24.	2022-12-24 23:00:14 +01:00
Mikaël Capelle	2ec0a3d5f9	Day 24.	2022-12-24 20:50:37 +01:00
Mikael CAPELLE	0327a3f36a	Add day 23.	2022-12-23 13:25:22 +01:00
Mikaël Capelle	3732e70ef7	Ugly day 22.	2022-12-22 23:00:36 +01:00
Mikaël Capelle	b0cc6b4a46	Update day 22.	2022-12-22 18:46:59 +01:00
Mikael CAPELLE	8c24b9f9e2	Update day 22.	2022-12-22 17:22:56 +01:00
Mikael CAPELLE	dca6f6a08f	Update day 22.	2022-12-22 17:00:09 +01:00
Mikael CAPELLE	8d7a20f575	Day 22 part 1.	2022-12-22 14:10:30 +01:00
Mikael CAPELLE	3934dfd152	Start day 22.	2022-12-22 08:20:09 +01:00
Mikael CAPELLE	b656e8929e	Remove tqdm from day 19.	2022-12-21 17:39:43 +01:00
Mikael CAPELLE	c9c69f479b	Day 21.	2022-12-21 09:44:05 +01:00
Mikaël Capelle	72ebcfff1f	Clean day 20.	2022-12-20 23:39:26 +01:00
Mikaël Capelle	dd72bb3238	Add empty files for following days.	2022-12-20 21:51:38 +01:00
Mikael CAPELLE	c1dd74c57d	Faster day 20.	2022-12-20 18:27:09 +01:00
Mikael CAPELLE	1bf2de62c7	Day 20, slow.	2022-12-20 13:39:36 +01:00
Mikael CAPELLE	df808bc98a	Start day 20.	2022-12-20 12:35:01 +01:00
Mikaël Capelle	f46e190e98	Add all tests from previous days.	2022-12-19 22:32:15 +01:00
Mikaël Capelle	7f4a34b2d7	Day 19.	2022-12-19 22:09:20 +01:00
Mikael CAPELLE	ddebd26db2	Tmp	2022-12-19 18:46:16 +01:00
Mikael CAPELLE	01300e23b2	Start working on day 19.	2022-12-19 13:51:32 +01:00
Mikaël Capelle	b8e2faa8c9	Clean day 17.	2022-12-18 16:46:00 +01:00
Mikaël Capelle	ea5b757180	Day 18.	2022-12-18 09:57:35 +01:00
Mikaël Capelle	89a71c175f	Day 17.	2022-12-17 12:27:05 +01:00
Mikaël Capelle	9ffb332dea	Day 17.	2022-12-17 12:25:48 +01:00
Mikaël Capelle	8167ab34c7	Less BFS for day 16.	2022-12-16 22:56:34 +01:00
Mikaël Capelle	100df02a09	Better day 16.	2022-12-16 22:52:03 +01:00
Mikael CAPELLE	15b987a590	Update ugly day 16.	2022-12-16 18:40:21 +01:00
Mikael CAPELLE	b1578f5709	Add ugly day 16, to be improved...	2022-12-16 09:21:54 +01:00
Mikael CAPELLE	d80dbb6c7c	Update day 15.	2022-12-15 14:17:04 +01:00
Mikael CAPELLE	b679c1f895	Add day 15.	2022-12-15 09:36:19 +01:00
Mikael CAPELLE	e9d5f9747b	Add day 14.	2022-12-14 09:29:56 +01:00
Mikael CAPELLE	fe3aad7ddd	Clean day 9.	2022-12-13 11:18:31 +01:00
Mikael CAPELLE	7ac9981ae5	Clean day 13.	2022-12-13 08:59:53 +01:00
Mikael CAPELLE	652756a341	Add day 13.	2022-12-13 08:54:15 +01:00
Mikael CAPELLE	c7ef505f1b	Clean day 12.	2022-12-12 17:55:24 +01:00
Mikael CAPELLE	c55f6ac8e1	One to many Dijkstra.	2022-12-12 17:50:48 +01:00
Mikael CAPELLE	726a6aecac	Generic Dijkstra for day 12.	2022-12-12 15:59:19 +01:00
Mikael CAPELLE	291b188238	Clean day 12.	2022-12-12 10:48:37 +01:00
Mikael CAPELLE	289e3b7d02	Add day 12.	2022-12-12 09:35:12 +01:00
Mikaël Capelle	9820765e9c	Clean monkey code.	2022-12-11 11:50:23 +01:00
Mikaël Capelle	c6522de8a2	Add day 11.	2022-12-11 11:42:47 +01:00
Mikaël Capelle	80465e5e53	Add day 10.	2022-12-10 10:24:23 +01:00
Mikaël Capelle	af1428b5e1	Add day 9.	2022-12-09 10:45:00 +01:00
Mikael CAPELLE	fca283527d	Add 2022 day 8.	2022-12-08 08:59:25 +01:00
Mikael CAPELLE	0d37458ec5	Add 2021 day 5.	2022-12-07 18:41:39 +01:00
Mikael CAPELLE	198927e4a3	Add day 7.	2022-12-07 09:28:06 +01:00
Mikael CAPELLE	4192c98bba	Cleaning.	2022-12-06 15:28:46 +01:00
Mikael CAPELLE	7cb8317659	Add day 6.	2022-12-06 09:03:22 +01:00
Mikaël Capelle	f46cb51c60	Add day 4.	2022-12-05 19:09:55 +01:00
Mikael CAPELLE	261a396ae7	Add day 5.	2022-12-05 08:58:25 +01:00
Mikaël Capelle	4b3af377ab	Day 3.	2022-12-03 11:42:09 +01:00
Mikael CAPELLE	f697415ef2	More comments.	2022-12-02 15:06:37 +01:00
Mikael CAPELLE	ac2806b0fb	Comments.	2022-12-02 09:21:38 +01:00
Mikael CAPELLE	c62b8abfd0	Day 2.	2022-12-02 09:12:49 +01:00