2023 day 17, v2.

2021/day1.py

@@ -0,0 +1,14 @@
+import sys
+
+lines = sys.stdin.read().splitlines()
+
+values = [int(line) for line in lines]
+
+# part 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)]
+answer_2 = sum(v2 > v1 for v1, v2 in zip(runnings[:-1], runnings[1:]))
+print(f"answer 2 is {answer_2}")

2021/day10.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day11.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day12.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day13.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day14.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day15.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day16.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day17.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day18.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day19.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day2.py

@@ -0,0 +1,40 @@
+import sys
+from math import prod
+from typing import Literal, cast
+
+lines = sys.stdin.read().splitlines()
+
+commands = [
+    (cast(Literal["forward", "up", "down"], (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:
+        d_depth = 0
+        match command:
+            case "forward":
+                pos += value
+                depth += value * aim
+            case "up":
+                d_depth = -value
+            case "down":
+                d_depth = value
+
+        if use_aim:
+            aim += d_depth
+        else:
+            depth += value
+
+    return depth, pos
+
+
+# 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}")

2021/day20.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day21.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day22.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day23.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day24.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day25.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/day3.py

@@ -0,0 +1,39 @@
+import sys
+from collections import Counter
+from typing import Literal
+
+
+def generator_rating(
+    values: list[str], most_common: bool, default: Literal["0", "1"]
+) -> str:
+    index = 0
+    most_common_idx = 0 if most_common else 1
+
+    while len(values) > 1:
+        cnt = Counter(value[index] for value in values)
+        bit = cnt.most_common(2)[most_common_idx][0]
+        if cnt["0"] == cnt["1"]:
+            bit = default
+        values = [value for value in values if value[index] == bit]
+        index += 1
+
+    return values[0]
+
+
+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))
+    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)
+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)
+answer_2 = oxygen_generator_rating * co2_scrubber_rating
+print(f"answer 2 is {answer_2}")

2021/day4.py

@@ -0,0 +1,45 @@
+import sys
+
+import numpy as np
+
+lines = sys.stdin.read().splitlines()
+
+numbers = [int(c) for c in lines[0].split(",")]
+
+boards = np.asarray(
+    [
+        [[int(c) for c in line.split()] for line in lines[start : start + 5]]
+        for start in range(2, len(lines), 6)
+    ]
+)
+
+# (round, score) for each board (-1 when not found)
+winning_rounds: list[tuple[int, int]] = [(-1, -1) for _ in range(len(boards))]
+marked = np.zeros_like(boards, dtype=bool)
+
+for round, number in enumerate(numbers):
+    # mark boards
+    marked[boards == number] = True
+
+    # check each board for winning
+    for index in range(len(boards)):
+        if winning_rounds[index][0] > 0:
+            continue
+
+        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]])),
+            )
+
+    # all boards are winning - break
+    if np.all(marked.all(axis=1) | marked.all(axis=2)):
+        break
+
+# part 1
+(_, score) = min(winning_rounds, key=lambda w: w[0])
+print(f"answer 1 is {score}")
+
+# part 2
+(_, score) = max(winning_rounds, key=lambda w: w[0])
+print(f"answer 2 is {score}")

2021/day5.py

@@ -1,7 +1,4 @@
-# -*- encoding: utf-8 -*-
-
 import sys
-from collections import defaultdict
 
 import numpy as np
 
@@ -34,7 +31,6 @@ counts_1 = np.zeros((y_max + 1, x_max + 1), dtype=int)
 counts_2 = counts_1.copy()
 
 for (x1, y1), (x2, y2) in sections:
-
     x_rng = range(x1, x2 + 1, 1) if x2 >= x1 else range(x1, x2 - 1, -1)
     y_rng = range(y1, y2 + 1, 1) if y2 >= y1 else range(y1, y2 - 1, -1)
 

2021/day6.py

@@ -0,0 +1,21 @@
+import sys
+
+values = [int(c) for c in sys.stdin.read().strip().split(",")]
+
+days = 256
+lanterns = {day: 0 for day in range(days)}
+for value in values:
+    for day in range(value, days, 7):
+        lanterns[day] += 1
+
+for day in range(days):
+    for day2 in range(day + 9, days, 7):
+        lanterns[day2] += lanterns[day]
+
+# 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}")

2021/day7.py

@@ -0,0 +1,21 @@
+import sys
+
+import numpy as np
+
+positions = np.asarray([int(c) for c in sys.stdin.read().strip().split(",")])
+
+min_position, max_position = positions.min(), positions.max()
+
+# part 1
+answer_1 = min(
+    np.sum(np.abs(positions - position))
+    for position in range(min_position, max_position + 1)
+)
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = min(
+    np.sum(abs(positions - position) * (abs(positions - position) + 1) // 2)
+    for position in range(min_position, max_position + 1)
+)
+print(f"answer 2 is {answer_2}")

2021/day8.py

@@ -0,0 +1,87 @@
+import itertools
+import os
+import sys
+
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
+
+digits = {
+    "abcefg": 0,
+    "cf": 1,
+    "acdeg": 2,
+    "acdfg": 3,
+    "bcdf": 4,
+    "abdfg": 5,
+    "abdefg": 6,
+    "acf": 7,
+    "abcdefg": 8,
+    "abcdfg": 9,
+}
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+lengths = {len(k) for k, v in digits.items() if v in (1, 4, 7, 8)}
+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] = []
+
+for line in lines:
+    parts = line.split("|")
+    broken_digits = sorted(parts[0].strip().split(), key=len)
+
+    per_length = {
+        k: list(v)
+        for k, v in itertools.groupby(sorted(broken_digits, key=len), key=len)
+    }
+
+    # a can be found immediately
+    a = next(u for u in per_length[3][0] if u not in per_length[2][0])
+
+    # c and f have only two possible values corresponding to the single entry of
+    # length 2
+    cf = list(per_length[2][0])
+
+    # the only digit of length 4 contains bcdf, so we can deduce bd by removing cf
+    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:])]
+
+    # we can remove a
+    dg = [u for u in adg if u != a]
+
+    # we can deduce d and g
+    d = next(u for u in dg if u in bd)
+    g = next(u for u in dg if u != d)
+
+    # then b
+    b = next(u for u in bd if u != d)
+
+    # f is in the three 6-length digits, while c is only in 2
+    f = next(u for u in cf if all(u in p for p in per_length[6]))
+
+    # c is not f
+    c = next(u for u in cf if u != f)
+
+    # e is the last one
+    e = next(u for u in "abcdefg" if u not in {a, b, c, d, f, g})
+
+    mapping = dict(zip((a, b, c, d, e, f, g), "abcdefg"))
+
+    value = 0
+    for number in parts[1].strip().split():
+        digit = "".join(sorted(mapping[c] for c in number))
+        value = 10 * value + digits[digit]
+
+    if VERBOSE:
+        print(value)
+
+    values.append(value)
+
+
+answer_2 = sum(values)
+print(f"answer 2 is {answer_2}")

2021/day9.py

@@ -0,0 +1,13 @@
+import sys
+from collections import defaultdict
+from dataclasses import dataclass
+
+lines = sys.stdin.read().splitlines()
+
+# part 1
+answer_1 = ...
+print(f"answer 1 is {answer_1}")
+
+# part 2
+answer_2 = ...
+print(f"answer 2 is {answer_2}")

2021/inputs/day4.txt

@@ -0,0 +1,601 @@
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+
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2021/inputs/day6.txt

@@ -0,0 +1 @@
+2,3,1,3,4,4,1,5,2,3,1,1,4,5,5,3,5,5,4,1,2,1,1,1,1,1,1,4,1,1,1,4,1,3,1,4,1,1,4,1,3,4,5,1,1,5,3,4,3,4,1,5,1,3,1,1,1,3,5,3,2,3,1,5,2,2,1,1,4,1,1,2,2,2,2,3,2,1,2,5,4,1,1,1,5,5,3,1,3,2,2,2,5,1,5,2,4,1,1,3,3,5,2,3,1,2,1,5,1,4,3,5,2,1,5,3,4,4,5,3,1,2,4,3,4,1,3,1,1,2,5,4,3,5,3,2,1,4,1,4,4,2,3,1,1,2,1,1,3,3,3,1,1,2,2,1,1,1,5,1,5,1,4,5,1,5,2,4,3,1,1,3,2,2,1,4,3,1,1,1,3,3,3,4,5,2,3,3,1,3,1,4,1,1,1,2,5,1,4,1,2,4,5,4,1,5,1,5,5,1,5,5,2,5,5,1,4,5,1,1,3,2,5,5,5,4,3,2,5,4,1,1,2,4,4,1,1,1,3,2,1,1,2,1,2,2,3,4,5,4,1,4,5,1,1,5,5,1,4,1,4,4,1,5,3,1,4,3,5,3,1,3,1,4,2,4,5,1,4,1,2,4,1,2,5,1,1,5,1,1,3,1,1,2,3,4,2,4,3,1

2021/inputs/day7.txt

@@ -0,0 +1 @@
+1101,1,29,67,1102,0,1,65,1008,65,35,66,1005,66,28,1,67,65,20,4,0,1001,65,1,65,1106,0,8,99,35,67,101,99,105,32,110,39,101,115,116,32,112,97,115,32,117,110,101,32,105,110,116,99,111,100,101,32,112,114,111,103,114,97,109,10,209,573,1277,704,518,276,196,62,1226,170,58,1450,101,65,99,435,986,1437,1570,35,354,247,110,105,139,1209,23,1074,339,69,483,21,33,323,1348,111,2,270,1239,316,529,1680,1056,1960,257,1009,1073,59,425,1181,198,31,299,771,53,817,728,931,72,517,39,279,304,401,1271,533,1551,133,297,162,902,370,985,643,1217,78,16,380,223,177,600,349,12,776,26,1738,526,85,1542,111,844,93,595,1545,873,836,422,180,1187,329,231,1521,54,162,212,471,1329,156,1299,160,541,676,67,200,22,24,76,242,178,1093,1173,818,1380,284,335,642,1047,112,271,541,927,52,983,238,116,135,871,400,436,1094,684,249,263,303,24,437,813,32,45,19,620,57,866,44,68,277,1112,110,77,1481,437,302,678,541,904,322,13,186,1474,836,43,1020,201,1586,1169,1149,470,535,55,879,133,1229,106,989,1023,256,103,56,401,667,557,98,288,694,286,237,1661,933,1063,20,227,80,815,289,1414,234,517,227,616,829,191,1211,92,591,279,22,139,67,214,60,145,468,10,521,807,1243,76,163,190,122,804,88,383,319,1127,399,376,423,304,126,10,297,377,1103,691,139,70,519,16,15,43,397,468,1183,90,28,1262,151,1448,62,64,1072,386,1330,1313,12,100,657,28,55,612,337,1865,704,263,565,249,564,565,1218,40,1146,150,718,1253,228,120,713,925,159,36,1087,1023,1490,316,540,1124,1127,781,417,656,0,174,1006,529,389,86,90,78,403,1500,253,35,655,650,933,815,108,168,321,345,147,251,258,25,173,243,740,48,476,1507,634,425,738,160,1415,395,448,156,636,1967,516,316,628,810,817,26,20,753,22,1133,352,204,211,47,22,874,43,12,18,1015,779,108,579,251,1398,33,1507,93,274,904,221,1062,868,3,363,42,14,435,62,1508,540,64,267,1690,418,205,502,152,142,414,178,50,344,780,81,635,128,355,239,1708,1814,29,251,624,22,38,789,948,186,529,895,76,150,416,502,975,1216,456,862,522,1149,131,10,121,1353,313,568,595,6,318,633,331,1652,656,214,21,35,289,80,860,229,244,1188,350,594,424,235,327,6,1083,40,134,839,279,172,1452,197,47,2,73,607,238,1151,844,533,110,1207,125,129,16,1000,965,236,228,497,589,111,1245,453,179,956,116,212,47,497,380,574,355,799,209,384,47,449,688,312,748,1531,1092,23,1001,69,155,924,1352,163,1561,743,609,1261,1231,32,1,739,513,300,370,36,568,89,487,201,11,146,274,163,1029,829,469,299,118,732,769,120,1093,776,610,1944,90,67,494,831,88,227,1257,344,662,401,310,664,56,94,183,935,179,643,4,1083,567,1525,208,204,899,123,36,438,1171,265,1406,177,202,1398,631,444,385,589,29,124,96,237,374,793,794,502,665,287,575,113,305,157,465,376,66,662,77,595,75,141,243,254,30,5,622,140,443,566,360,192,1531,1113,1299,598,147,469,732,1565,409,1380,550,173,232,361,131,99,37,547,132,1779,193,228,664,553,568,389,1069,58,71,610,738,624,261,491,158,105,416,131,198,35,823,9,313,6,429,1492,290,313,272,281,427,280,661,141,54,383,3,130,43,418,2,1040,1051,1006,38,151,1325,1357,117,1473,175,201,613,1458,1218,588,169,228,565,901,420,42,117,110,442,9,99,1685,979,84,35,129,248,1,21,360,123,203,1320,1200,209,510,362,106,148,313,292,63,842,93,88,134,720,565,156,118,983,119,1451,757,736,445,466,226,265,573,612,652,170,225,32,1049,1332,366,1375,692,270,388,321,1153,909,1266,93,5,495,377,212,429,90,199,278,631,693,63,816,395,281,315,0,737,575,121,865,1,485,262,49,804,518,109,600,358,221,14,370,450,947,448,67,576,22,1266,226,100,10,607,620,295,568,316,51,687,199,1478,45,489,1878,1035,298,219,363,85,664,1290,492,70,644,78,163,100,102,465,732,439,93,25,847,297,172,361,393,304,461,583,122,121,762,58,112,85,142,48,193,1617,386,685,1054,584,488,394,665,277,263,596,290,1231,171,1394,9,1218,77,54,487,182,528,695,662,413,345,51,690,1702,203,1500,461,1755,190,371,1122,1614,324,238,569,1482,15,711,1332,700,437,242,174,642,660,987,1232,121,620,17,389,22,105,847,36,251,285,1238,162,1227,1473,411,66,258,377,1135,438,117,664,281,1070,301,132,256,498,172,194,103,662,606,342,340,1501,802,549,380,58,179,361

2021/inputs/day8.txt

@@ -0,0 +1,200 @@
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+cfeba ag fecag feacgb eag defgc egabfd gbcafed agcb bdacef | gcfabe efcadgb ga gabc
+fgeadb gbfdace feacb ed bacfde fdbcg edca ecbdf cebgfa def | ebcfa acebdgf efd aced
+fcgad aegfdb ea bdfcea dea egfbd aebg cgbedaf begfdc fedag | geba egbfd fdagbe dcbaef
+faebdg efbca fadce bgefa fcbgae dbecfag bgcf cb ecb dgaecb | cadebgf ecb gcfb cb
+ecdf begca cbagfd ed edb dfebacg cdgfb bcedg cgbfed edagbf | de dfce gedcbf de
+badfec dfgcab gdbeafc cbf defc acefb ebdgaf cf abedf egacb | cdfe cdef fedc fc
+afcgbd fdcg fbc bgdac acbgef cf fcabd gdebca fbaed fcdageb | cf fbc cf gfcd
+cefba dbef fe gdafec dbcae fdebac bfadcge fec gceabd abcfg | gacedb debac bcaed gacfdbe
+bagfe db bdf gafdc bfgda cgefbd cafedg fcgabd fdeacbg dacb | gabdf cdgbfa bd egfbdc
+dbcaef bacfd begfcd gbafc cedbf da eabd gecdfa cda fbecgda | aedb cda efcdb adcfbe
+faebgd afcbdg gf dbacfeg gdf degfa dcfea gebda dgaceb gfbe | bgfe decaf gf edgfa
+fg aecgbfd ebcfa efabg adgeb fge egcbdf bedagf dbcaeg fagd | fg dfga gfda gafd
+cedgabf dcba ab cedaf bae cabefd fgaced fdaeb fabgec dfgeb | bedfac ab fecbga debfcag
+dec ce fcabde daefb fgabde aefc bdagc dcgfeb efcdabg caedb | gadbfec ecfa baefgd ce
+egcaf ed adbe afbcd dgfecba acbdgf edf decfab edcaf egbcfd | dgecfab eabdfcg fbdaec abed
+fea febcg eacgf ecda cdgfa agcedfb edgfba ae agcfde cbadgf | fcegb fgbaced dcafg caed
+gebfd ec dec eabc bafcged debgc fecgda fdgabc dcgabe cgadb | adegbcf gbacfed bfgcdea ce
+egfdab cad bcgad cd bcfga gfdbcea dgcaeb cedg defbac beagd | cadbfe decg cd cadfeb
+cge gadebfc fbcgae gc dagec agdeb dcefga cgdf afbecd ecfda | ebgcaf dbeag fgcdbae dgcf
+bdegca ecbdaf bfae cgdfb ebafdgc ba dfabc bac feagcd fdcea | bac ebcfadg ba ab
+gceda eab agbfedc eafcdg ab gbac bgdef gacbed dgbea cfaebd | bgfcade ba abgc bae
+gbfe eg gcfdeb daebcg bcdef cgefd cdfag fbdeac egcadfb gec | ge befgdc gce egc
+bga gbeacd cbgde gdefcab cagbdf ab beda cfbegd aecgf agecb | agfce daeb bead agb
+fedgba agecbf bc bcdf cgb febdcg ecgfabd gcade dgbec efgdb | bgedfac cb bc bc
+gfaeb bcdfe cea gfca bdacge aecbdfg fegbca ac dfgbae caefb | cfga agcf cfga cbgade
+cgeab fbegda adb dagbfec eafgbc bd bgcd adecf cegdba daebc | efbcdag gdcb bd deacfgb
+bcagd cbgde gbfad eabdgf cda ceabfd fcag cdgabf agcbdfe ca | ca ca ac cda
+agdce dageb eacdbf ecgdaf bafgd dgfacbe dgbaec bceg bea be | gceb bgdcaef edgac aedgc
+bceadf adcfeg ga dfag geacd cabegdf ceafgb gca aecfd edcbg | ag acbfde gdfa ag
+fdcegb abdfce cdega bgcad gfea cae ae bcafged fagedc fgdec | gfdce bafcde gfcdeb ae
+egbcda cebadf bfe ef bedcg bgfda fgec fedbg begcfad gdbcef | bef gcbeda ef ecgf
+egfdb cgd gdbfea cgbdf fdcba fgbdaec agbdec cg fecg cgdbfe | abgfedc fbcgd cegf gc
+cfbegd ab gbacfd agefd ceab baf acfgdeb eafbgc bfegc bagef | ba abf beca baf
+fcega fecda cbgaef fgaedb gbfc geadbc fag ecbdgaf eacgb fg | ecdfa bfgc dgebaf gcabe
+aefdcg gfdcab ab fagb dbaegcf adb faecbd gcadb fcgad ebdgc | gadcef bfdaecg fgba fgecad
+eabfc cdebf bgfca ecfbgad fbdceg aeb gceabd afde ea cbfade | abcdgef eabfc abe bdcfae
+cd dgfceab dec cbegfd gedaf adfgec ecbag fgadbe cadf cgdea | fgedbc edc dce adcgfeb
+agcdbf ecdgf adfcg agfcbed ef ecdfab efc agfe cgebd defagc | eadcfb cfdbega cef geaf
+cdbafe deacf ga dbecag fecdagb bcfge gfda caedfg gae eagfc | ga eag gfcebad cfgae
+ceadfg bdf gfbec adbe fbegd abgdfc bd gdefa gdfeba dgacefb | bagedfc facedgb fbd bd
+ecdba ecdagb gcfeda fbdaeg cfedb befcdag ca agedb abcg ace | cea fbaged eca bcag
+gfedc gdaf gaefc dcf bgcde gdeafc fcgadeb gecabf cdafbe df | fd gcaef df egfdca
+afegb cefgb eadcbg cgfbad dbecg cfde aegbcdf fcb gdebfc fc | fbcged bcf gbced aefgdcb
+ca bfeda cae ecdfgb edgcf dgceaf gbaced afcg gbeacdf aefcd | ac dfcebag cagf ace
+begcad efdagb fbgeadc fedcba aec abedg fcegb ca cgda abegc | abcfgde fgebadc bagedf gdca
+aegb cfeadb acdgf decgbf ecgdb gcfedab bgdcea ba gbdac bad | bgceda gdafc fgadc dafcbe
+fgecba aec adfe deacb ae abegdcf bcdag ecbfd gecdbf dafceb | gdcab ae edfa daef
+agfde eacg adebfg fdgcb cafdg fgdeca cfbaed ac gcadfbe acf | fca gdfae acge dbeacf
+fbagce de deg edfa fcbdg gbdcae aegfb dbgfe dgacbfe gefbad | edfa de ged bdgcf
+bacfdg cdeafgb aecbfd daefb agedc afc abdefg cebf deacf cf | gbdafc efbc cfead fc
+cegfab cdag bdc dc febad gfdbce dcaefbg gfbac dcafbg cdabf | dgafcb cdag dcbgeaf gaefdbc
+dagefb acefg afdcb gd dgfaecb facbgd bcdg gda badcfe fgacd | fbecgda cfadb gbdc fcaeg
+gfbd cfeda gabcfe db dba baefg beafd bcgdae fedcbag efbdag | dba bad ebgaf dbegfca
+cf fbdega aefbg afbcedg edgca dgbcfe gfaec febcag ecf afcb | aefbg gcaefb dbcegaf cef
+gebdaf abgd cdabfe gacefbd agfed dg ged fegac aebfd fbdcge | egd abdegcf gadb afbgde
+gcdf efdcb acfebd beagdc gd bdefg ebfcgd bdg fbega geabcfd | dgceba ecadgb adgfbce edbgf
+fdcaebg efbdgc bgdacf dcae cbdge gebaf abd edgab da bgaedc | cebagd ad da gebcda
+bfgcae cbd bcfea aedcb gbefcd cd adecfb adfc cagdfbe dbega | fcad cdabgfe dacf dcb
+becg gfbace egacfbd acbfg acdfgb aec ce bdfea cgedaf fbcea | afcbg fedagc befac aecfgd
+befa cgfed cfadb gdcfba acdfe ace edgbac fgcdbea ceafdb ae | feab eacdf bcdgafe bfae
+bcdefag dafeg fgec dgeafc gea gdfbca cgdaeb bfdea eg dgafc | eg aefcdgb ecdfag gea
+gfadb gedfb bdecgfa adbefg dcgaf abf gdcefb aebg ab bafced | gdbfe gbfed ebag cabgfde
+dbegfa acgbdf eg gcfbed gdafb bfacegd ebg aged fageb bacfe | ge gefcdba ge bgdfa
+adbgec fdceg afdgc bedf cfe fe gaecbdf faebgc gcbed fcbedg | acfdg gdeabc debf ef
+dfgbe da ecbadg dafeg fadb gfdbea dagcfbe dbgfec cfgea dga | befdg agd eafdg fabd
+bedc aefbc ceadfb fdb cbagfed fecgab dcfba gaebdf cfagd bd | db bfd bfcae adgefb
+cabedgf edbfgc gedcfa bacegf fde dgbf baced fd fedbc fegbc | fcdeb adbgefc adecgbf fde
+fged egafc ecafgd efcda dfa dfcabg becfag fd agcdfbe ecdab | dgef fd dgfe df
+deafgb gbfdc dg dbg agdc dbcafg cadfb bafced fgbce daegbfc | gbfdac afdgcb dgb gdcfb
+dfecb fabdge cegbaf fdca faecb aefcdb bdf gdbce afgcebd fd | dbf fbd edcabgf fadc
+cbf egabfdc fdcgba fabecd cf dfagb gfac adbegf cdegb bcfgd | acfg afgbed cgdfab fc
+ebdfagc bcfa gecfdb af daegbf fgcbd bcdfag egcda fgdca gfa | fcab gafcdb dbfega acfb
+adfbg eacb abfcg ecafbg gface ecfgad bc degfbc cbg gabdefc | cb gabefcd cagfebd agcbfe
+ebgad bef gacfe gceadf fb efcagbd eabfcd cegfab gbfc ebagf | cefadg fcgae fgbc ebacdgf
+dcg aged efacd cfgdae edacbf edfcg bcagdef gd fecbg dcfbag | cdeabgf gd gcd adge
+fecgda cdabefg gabfc gfacbd ecgabf cbafe bcdef ea ace bgea | egba gabe beagfdc fbcag
+bacdgf eafbd cagde becad afgcedb bc fbegad cfbe cba fcdaeb | fcbe abc dbecaf edcba
+ecbdf dagfceb abcfde cbade aebgc adb bfgead debfgc cafd ad | bad dcaf begac da
+gbae deafb fdgbea cegfd ag cdaefb cgabefd degfa dag dfcgab | baeg agefdb bcdafg cbdfga
+ebcdf gdeafbc cdgbfe eaf cdfa deafbc gedab aecfbg ebadf af | befacd ebfda af af
+cfab dcb gfedbac bc cgaedb fbdge cbfdg acgbdf gdcaf acgdfe | bc fcab afcb dbc
+edbag gebdc bedfag eacdbg bcedgfa ecab ec gaedcf bdcfg cge | ce ceab ec bdegcaf
+fedcba fbgca cbafge ef gbdacf efbgcad gefca befg ecdga afe | fea adgfcb fcage bcdfae
+da edfgc cgfdba adfecgb gfaeb dcefga fecdgb gad gdeaf ecad | cedfg dbfcega gfcaed abdcfeg
+fcgbed fcbedga cafbe gdceba bcafge bfe fagb fb eacbg facde | cdfbeg fb ebgcadf fgcedba
+fecdb fdcbae afdeg cdfea aec efgbadc ca cbfa dcagbe gbefdc | facb fabc fcdbega efadcb
+dagcf gadfeb ad dfegbc cgdfba dbac abgecfd dcgfb cfgae adf | fgadc cbda ad cfagd
+fdgcb agedbc cdbef feac efb ef febdac afdegb abced edgafcb | fe bfecd dcebf cafe
+cafdbg eaf fe gebf befcag cfbga cgaef fdaecbg edcga febacd | gfbe egbf aebgcdf faceg
+bfc febg cdfga dafbec cegbd fb cdbgfe cbfgd cadegb gbefdac | dcefgb dbfcg deafbc gbdec
+bacgd cedfbg cf aefc dfc aecgdf adfcgeb gafed cafgd baefdg | dgafc fc dfc gfbced
+bcge fgc efcdab ecgafb cfeab fabgd fagbc bgcdeaf efcagd cg | cbeg bdagf bcgaf fgc
+cdaeg fbaec ceafd fd cfd adfceb bgaecf dbcegf bdaf cgeabdf | df cdf fdagbce cbedaf
+dgcbf gecfadb gbdecf gfdbca fbagde ad cdgab dag afcd caegb | cgbedf dfac bdacfeg cafdbg
+defacg bd cdbegaf cfaeb dbf cbefgd cgdaf cfbgda facbd gabd | gfadec bdf gbad adgcef
+bagdce deagcf bcdf cfa abgfdc cf geacfbd afgeb bacfg dcagb | cf cdbf aedcbfg fbdc
+fbceda bedcf dg gefcdb aefbgd gdf cgde gfacb bdcfg dfcegab | dfbagec dfg cabdfeg gd
+gda cfgbde dgbfc fgabdc fcagd cagfe baecgdf faebdg ad adbc | efgdcb dag dacb ad
+dagec eca fgeacd cdefab gfdacbe afged dabgfe ac dcebg afgc | bdgce ecdga eagdc ca
+da bda gadc dbafg fabgc faedcb dfcbgea agcfbe bedgf gfbadc | acbfegd gfabdc bad da
+gdce aebfdg faebc fcdabg acgfedb eacgdb adc adgeb cd daceb | cd cgbadf cad edcg
+caedb agbed gfbcad eca fdce gbface baefdcg acfdb fbedca ce | eac cebadf fagcdb cae
+fcbadeg fcae bfdca ceb ec cdebaf ecbdf gcedab bgdfe dfagcb | geabcd acef agbced gdbeafc
+cbdef degba efbad eafc dbcfge ecdafb af fcbgad edfbcag baf | gbdea ecaf eacf egfcdab
+fcde gabfd cdgeba fac fc dcabe bfaced dacbf ebgfac cgfbeda | adcfb fca gebdfca fadbc
+fdceg cbd edcgfa cb cdgfeb gdebac edgcafb fceb agbdf bgcfd | adfgce beacdgf bc cedfbag
+fcbegda dbcefg gcebad gbfc cdb gfbaed bc cebfd ecdfa bdegf | dcb gabedf beafdg bc
+cfaed bacdg egd aegcdf gcef gedac cdbefga afdgbe bdfaec eg | gcade cefad bdgfea gaedc
+ac dbeacg ace defba fcaebdg dabfce abfedg dcaf cbfae efbcg | fegdba cfbae cea dbacfe
+dgcaef bgcaef cfdgeb gd fgecb dcgfbae gebfd bgdc adebf fdg | gdf dafgbec dfg adfeb
+ag cadg cgfed aefbc bcegdf agdfbe agf egfca gefcdba gdfeac | dgca dgcaef cdga adebcfg
+dfcgbe badg aedgc eabfc dfcbega cgdafe eagbc aegcdb gbe bg | acfdge bge adbg bg
+bcfage adcefg dfagc fgaec cdf abcgd dcbgafe df dfae fgcbed | df cfd eacgf fdc
+cbadfe bfg cfgebd cbdg edfgbca bg egbdf feagcb fedag cefdb | fgdeb gfb fbdeca bgcd
+bcde fdcgba abfcde dbfac abefc befga aec ce acfdge afdegbc | fcbad eac ec becd
+ce cbagdf gdcbf cfaebdg gcbe acfdge fcdegb dbaef cef bcefd | acbgdfe cfebd gcebdf ec
+ecgbd eacbf cgadeb edf ecafbdg afgebd dcgf ecfbd fgcbed fd | bcfea edf efgabcd df
+dgbf egafcd cfedbag cgb abcef dcefg ebcfg cgeadb bg cgbfed | adfgebc egbcf cfeab gaefbdc
+gecbfd gbedc dgabcef baefgd abegc dbfce bfdace dg gdb dfcg | dfgc bedfac dg dbg
+acbdgf daeb gcbeaf gdfce adefg fbdga cbdfega fae fgdbea ea | ea fcdgaeb ae gecfadb
+ga bdgafe bcaed dcgaebf bacfed acedg gbadec edgfc agd bcga | adg dga agcb fdecgab
+ebdcfg cfbdg ecgabf gcd edfc fdcbeag ebcdag dabgf dc cgebf | cd gcd gacbde cd
+egdfac bf afebdg baf bfdeca bgdf fedga egacb gecbafd gbeaf | bfa fb gfdb fb
+gcafb dc gecd fecbgda cfdbg dfebgc cdf fbegd dcfbea fgedab | edfcbg dgbcf cd dcf
+badf fcagd agcefb dfgcab ba dcbeg cedabgf abgdc acegfd abg | ebfagc dfab ab fcbdeag
+cfgbad gdbfe fe efgdacb cbdge dabgfe egdcaf befa bdgfa egf | decagfb eabf baef fe
+dbfea bcaefdg dcfgeb ag bfceag egfcda becfg fgeba gcab ega | agbfecd aedfcgb gcba ga

2021/tests/day1.txt

@@ -0,0 +1,10 @@
+199
+200
+208
+210
+200
+207
+240
+269
+260
+263

2021/tests/day2.txt

@@ -0,0 +1,6 @@
+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2

2021/tests/day3.txt

@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010

2021/tests/day4.txt

@@ -0,0 +1,19 @@
+7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
+
+22 13 17 11  0
+ 8  2 23  4 24
+21  9 14 16  7
+ 6 10  3 18  5
+ 1 12 20 15 19
+
+ 3 15  0  2 22
+ 9 18 13 17  5
+19  8  7 25 23
+20 11 10 24  4
+14 21 16 12  6
+
+14 21 17 24  4
+10 16 15  9 19
+18  8 23 26 20
+22 11 13  6  5
+ 2  0 12  3  7

2021/tests/day6.txt

@@ -0,0 +1 @@
+3,4,3,1,2

2021/tests/day7.txt

@@ -0,0 +1 @@
+16,1,2,0,4,2,7,1,2,14

2021/tests/day8.txt

@@ -0,0 +1,10 @@
+be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb | fdgacbe cefdb cefbgd gcbe
+edbfga begcd cbg gc gcadebf fbgde acbgfd abcde gfcbed gfec | fcgedb cgb dgebacf gc
+fgaebd cg bdaec gdafb agbcfd gdcbef bgcad gfac gcb cdgabef | cg cg fdcagb cbg
+fbegcd cbd adcefb dageb afcb bc aefdc ecdab fgdeca fcdbega | efabcd cedba gadfec cb
+aecbfdg fbg gf bafeg dbefa fcge gcbea fcaegb dgceab fcbdga | gecf egdcabf bgf bfgea
+fgeab ca afcebg bdacfeg cfaedg gcfdb baec bfadeg bafgc acf | gebdcfa ecba ca fadegcb
+dbcfg fgd bdegcaf fgec aegbdf ecdfab fbedc dacgb gdcebf gf | cefg dcbef fcge gbcadfe
+bdfegc cbegaf gecbf dfcage bdacg ed bedf ced adcbefg gebcd | ed bcgafe cdgba cbgef
+egadfb cdbfeg cegd fecab cgb gbdefca cg fgcdab egfdb bfceg | gbdfcae bgc cg cgb
+gcafb gcf dcaebfg ecagb gf abcdeg gaef cafbge fdbac fegbdc | fgae cfgab fg bagce

2022/day1.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 blocks = sys.stdin.read().split("\n\n")

2022/day10.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 lines = sys.stdin.read().splitlines()

2022/day11.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import copy
 import sys
 from functools import reduce
@@ -7,7 +5,6 @@ from typing import Callable, Final, Mapping, Sequence
 
 
 class Monkey:
-
     id: Final[int]
     items: Final[Sequence[int]]
     worry_fn: Final[Callable[[int], int]]
@@ -97,8 +94,7 @@ def run(
     # number of inspects
     inspects = {monkey: 0 for monkey in monkeys}
 
-    for round in range(n_rounds):
+    for _ in range(n_rounds):
-
         for monkey in monkeys:
             for item in items[monkey]:
                 inspects[monkey] += 1

2022/day12.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import heapq
 import sys
 from typing import Callable, Iterator, TypeVar
@@ -44,7 +42,6 @@ def dijkstra(
         visited.add(current)
 
         for neighbor in neighbors(current):
-
             if neighbor in visited:
                 continue
 
@@ -60,7 +57,6 @@ def dijkstra(
 
 
 def make_path(parents: dict[Node, Node], start: Node, end: Node) -> list[Node] | None:
-
     if end not in parents:
         return None
 
@@ -109,7 +105,6 @@ def neighbors(
         (c_row, c_col - 1),
         (c_row, c_col + 1),
     ):
-
         if not (n_row >= 0 and n_row < n_rows and n_col >= 0 and n_col < n_cols):
             continue
 

2022/day13.py

@@ -1,27 +1,27 @@
-# -*- encoding: utf-8 -*-
-
 import json
 import sys
 from functools import cmp_to_key
+from typing import TypeAlias, cast
 
 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"]]
 
-def compare(lhs: list[int | list], rhs: list[int | list]) -> int:
 
+def compare(lhs: Packet, rhs: Packet) -> int:
     for lhs_a, rhs_a in zip(lhs, rhs):
         if isinstance(lhs_a, int) and isinstance(rhs_a, int):
             if lhs_a != rhs_a:
                 return rhs_a - lhs_a
         else:
             if not isinstance(lhs_a, list):
-                lhs_a = [lhs_a]
+                lhs_a = [lhs_a]  # type: ignore
             elif not isinstance(rhs_a, list):
-                rhs_a = [rhs_a]
+                rhs_a = [rhs_a]  # type: ignore
             assert isinstance(rhs_a, list) and isinstance(lhs_a, list)
-            r = compare(lhs_a, rhs_a)
+            r = compare(cast(Packet, lhs_a), cast(Packet, rhs_a))
             if r != 0:
                 return r
 

2022/day14.py

@@ -1,7 +1,4 @@
-# -*- encoding: utf-8 -*-
-
 import sys
-from collections import defaultdict
 from enum import Enum, auto
 from typing import Callable, cast
 
@@ -23,10 +20,10 @@ def print_blocks(blocks: dict[tuple[int, int], Cell]):
         blocks: Set of blocks to print.
     """
     x_min, y_min, x_max, y_max = (
-        min(x for x, y in blocks),
+        min(x for x, _ in blocks),
         0,
-        max(x for x, y in blocks),
+        max(x for x, _ in blocks),
-        max(y for x, y in blocks),
+        max(y for _, y in blocks),
     )
 
     for y in range(y_min, y_max + 1):
@@ -56,13 +53,12 @@ def flow(
         The input blocks.
     """
 
-    y_max = max(y for x, y in blocks)
+    y_max = max(y for _, y in blocks)
 
     while True:
         x, y = 500, 0
 
         while y <= y_max:
-
             moved = False
             for cx, cy in ((x, y + 1), (x - 1, y + 1), (x + 1, y + 1)):
                 if (cx, cy) not in blocks and fill_fn(cx, cy) == Cell.AIR:
@@ -117,10 +113,10 @@ print_blocks(blocks)
 print()
 
 x_min, y_min, x_max, y_max = (
-    min(x for x, y in blocks),
+    min(x for x, _ in blocks),
     0,
-    max(x for x, y in blocks),
+    max(x for x, _ in blocks),
-    max(y for x, y in blocks),
+    max(y for _, y in blocks),
 )
 
 # === part 1 ===

2022/day15.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 import numpy as np
@@ -7,7 +5,6 @@ import parse
 
 
 def part1(sensor_to_beacon: dict[tuple[int, int], tuple[int, int]], row: int) -> int:
-
     no_beacons_row_l: list[np.ndarray] = []
 
     for (sx, sy), (bx, by) in sensor_to_beacon.items():
@@ -37,7 +34,7 @@ def part2_intervals(
                 its.append((max(0, sx - dx), min(sx + dx, xy_max)))
 
         its = sorted(its)
-        s, e = its[0]
+        _, e = its[0]
 
         for si, ei in its[1:]:
             if si > e + 1:

2022/day16.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 from __future__ import annotations
 
 import heapq
@@ -69,7 +67,6 @@ def part_1(
     distances: dict[tuple[Pipe, Pipe], int],
     relevant_pipes: FrozenSet[Pipe],
 ):
-
     node_at_times: dict[int, dict[Pipe, dict[FrozenSet[Pipe], int]]] = defaultdict(
         lambda: defaultdict(lambda: defaultdict(lambda: 0))
     )
@@ -79,7 +76,6 @@ def part_1(
         for c_pipe, nodes in node_at_times[time].items():
             for flowing, flow in nodes.items():
                 for target in relevant_pipes:
-
                     distance = distances[c_pipe, target] + 1
                     if time + distance >= max_time or target in flowing:
                         continue

2022/day17.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 from typing import Sequence, TypeVar
 
@@ -49,7 +47,6 @@ def build_tower(
     early_stop: bool = False,
     init: np.ndarray = np.ones(WIDTH, dtype=bool),
 ) -> tuple[np.ndarray, int, int, dict[int, int]]:
-
     tower = EMPTY_BLOCKS.copy()
     tower[0, :] = init
 
@@ -59,7 +56,6 @@ def build_tower(
     rock_count = 0
 
     for rock_count in range(n_rocks):
-
         if early_stop:
             if i_rock == 0 and (i_rock, i_jet) in done_at:
                 break
@@ -75,7 +71,6 @@ def build_tower(
             tower = np.concatenate([tower, EMPTY_BLOCKS], axis=0)
 
         while True:
-
             jet, i_jet = next_cycle(jets, i_jet)
 
             dx = 0

2022/day18.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 from typing import FrozenSet
 

2022/day19.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 from typing import Literal
 
@@ -88,7 +86,6 @@ for line in lines:
 
 
 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.,
     # in the first toy blueprint, we need at most 4 ore robots, 14 clay ones and 7
@@ -100,7 +97,6 @@ def run(blueprint: dict[Reagent, dict[Reagent, int]], max_time: int) -> int:
     state_after_t: dict[int, set[State]] = {0: [State()]}
 
     for t in range(1, max_time + 1):
-
         # list of new states at the end of step t that we are going to prune later
         states_for_t: set[State] = set()
 

2022/day2.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 
@@ -49,7 +47,7 @@ lines = sys.stdin.readlines()
 values = [(ord(row[0]) - ord("A"), ord(row[2]) - ord("X")) for row in lines]
 
 # part 1 - 13526
-print(f"score 1 is {sum(score_1(*v) for v in values)}")
+print(f"answer 1 is {sum(score_1(*v) for v in values)}")
 
 # part 2 - 14204
-print(f"score 2 is {sum(score_2(*v) for v in values)}")
+print(f"answer 2 is {sum(score_2(*v) for v in values)}")

2022/day20.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 from __future__ import annotations
 
 import sys
@@ -21,7 +19,6 @@ class Number:
 
 
 def decrypt(numbers: list[Number], key: int, rounds: int) -> int:
-
     numbers = numbers.copy()
     original = numbers.copy()
 

2022/day21.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import operator
 import sys
 from typing import Callable

2022/day22.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import re
 import sys
 from typing import Callable
@@ -126,7 +124,6 @@ def wrap_part_2(y0: int, x0: int, r0: 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"

2022/day23.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import itertools
 import sys
 from collections import defaultdict
@@ -41,7 +39,7 @@ def round(
     directions: Directions,
 ):
     to_move: dict[tuple[int, int], list[tuple[int, int]]] = defaultdict(lambda: [])
-    for (y, x) in positions:
+    for y, x in positions:
         elves = {
             (dy, dx): (y + dy, x + dx) in positions
             for dy, dx in itertools.product((-1, 0, 1), (-1, 0, 1))

2022/day24.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import heapq
 import math
 import sys

2022/day25.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 lines = sys.stdin.read().splitlines()

2022/day3.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import string
 import sys
 
@@ -13,7 +11,7 @@ priorities = {c: i + 1 for i, c in enumerate(string.ascii_letters)}
 
 # part 1
 part1 = sum(priorities[c] for p1, p2 in parts for c in p1.intersection(p2))
-print(f"score 1 is {part1}")
+print(f"answer 1 is {part1}")
 
 # part 2
 n_per_group = 3
@@ -22,4 +20,4 @@ part2 = sum(
     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"score 2 is {part2}")
+print(f"answer 2 is {part2}")

2022/day4.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 lines = [line.strip() for line in sys.stdin.readlines()]
@@ -12,8 +10,8 @@ def make_range(value: str) -> set[int]:
 
 sections = [tuple(make_range(part) for part in line.split(",")) for line in lines]
 
-score_1 = sum(s1.issubset(s2) or s2.issubset(s1) for s1, s2 in sections)
+answer_1 = sum(s1.issubset(s2) or s2.issubset(s1) for s1, s2 in sections)
-print(f"score 1 is {score_1}")
+print(f"answer 1 is {answer_1}")
 
-score_2 = sum(bool(s1.intersection(s2)) for s1, s2 in sections)
+answer_2 = sum(bool(s1.intersection(s2)) for s1, s2 in sections)
-print(f"score 1 is {score_2}")
+print(f"answer 1 is {answer_2}")

2022/day5.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import copy
 import sys
 

2022/day6.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 

2022/day7.py

@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 from pathlib import Path
 

2022/day8.py

@@ -1,8 +1,7 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 import numpy as np
+from numpy.typing import NDArray
 
 lines = sys.stdin.read().splitlines()
 
@@ -27,7 +26,7 @@ answer_1 = (highest_trees.min(axis=2) < trees).sum()
 print(f"answer 1 is {answer_1}")
 
 
-def viewing_distance(row_of_trees: np.ndarray, value: int) -> int:
+def viewing_distance(row_of_trees: NDArray[np.int_], value: int) -> int:
     w = np.where(row_of_trees >= value)[0]
 
     if not w.size:

2022/day9.py

@@ -1,12 +1,9 @@
-# -*- encoding: utf-8 -*-
-
 import sys
 
 import numpy as np
 
 
 def move(head: tuple[int, int], command: str) -> tuple[int, int]:
-
     h_col, h_row = head
 
     if command == "L":
@@ -22,7 +19,6 @@ def move(head: tuple[int, int], command: str) -> tuple[int, int]:
 
 
 def follow(head: tuple[int, int], tail: tuple[int, int]) -> tuple[int, int]:
-
     h_col, h_row = head
     t_col, t_row = tail
 
@@ -33,8 +29,7 @@ def follow(head: tuple[int, int], tail: tuple[int, int]) -> tuple[int, int]:
 
 
 def run(commands: list[str], n_blocks: int) -> list[tuple[int, int]]:
-
+    blocks: list[tuple[int, int]] = [(0, 0) for _ in range(n_blocks)]
-    blocks = [(0, 0) for _ in range(n_blocks)]
     visited = [blocks[-1]]
 
     for command in commands:

2023/day10.py

@@ -1,13 +1,100 @@
+import os
 import sys
-from collections import defaultdict
+from typing import Literal, cast
-from dataclasses import dataclass
 
-lines = sys.stdin.read().splitlines()
+VERBOSE = os.getenv("AOC_VERBOSE") == "True"
 
-# part 1
+Symbol = Literal["|", "-", "L", "J", "7", "F", ".", "S"]
-answer_1 = ...
+
+lines: list[list[Symbol]] = [
+    [cast(Symbol, symbol) for symbol in line] for line in sys.stdin.read().splitlines()
+]
+
+# find starting point
+si, sj = next(
+    (i, j)
+    for i in range(len(lines))
+    for j in range(len(lines[0]))
+    if lines[i][j] == "S"
+)
+
+# find one of the two outputs
+ni, nj = si, sj
+for ni, nj, chars in (
+    (si - 1, sj, "|7F"),
+    (si + 1, sj, "|LJ"),
+    (si, sj - 1, "-LF"),
+    (si, sj + 1, "-J7"),
+):
+    if lines[ni][nj] in chars:
+        break
+
+# part 1 - find the loop (re-used in part 2)
+loop = [(si, sj), (ni, nj)]
+while True:
+    pi, pj = loop[-2]
+    i, j = loop[-1]
+
+    sym = lines[i][j]
+
+    if sym == "|" and pi > i or sym in "JL" and pi == i:
+        i -= 1
+    elif sym == "|" and pi < i or sym in "7F" and pi == i:
+        i += 1
+    elif sym == "-" and pj > j or sym in "J7" and pj == j:
+        j -= 1
+    elif sym == "-" and pj < j or sym in "LF" and pj == j:
+        j += 1
+
+    if (i, j) == (si, sj):
+        break
+
+    loop.append((i, j))
+
+answer_1 = len(loop) // 2
 print(f"answer 1 is {answer_1}")
 
 # part 2
-answer_2 = ...
+
+# replace S by an appropriate character for the loop below
+di1, dj1 = loop[1][0] - loop[0][0], loop[1][1] - loop[0][1]
+di2, dj2 = loop[0][0] - loop[-1][0], loop[0][1] - loop[-1][1]
+mapping: dict[tuple[int, int], dict[tuple[int, int], Symbol]] = {
+    (0, 1): {(0, 1): "-", (-1, 0): "F", (1, 0): "L"},
+    (0, -1): {(0, -1): "-", (-1, 0): "7", (1, 0): "J"},
+    (1, 0): {(1, 0): "|", (0, 1): "7", (0, -1): "F"},
+    (-1, 0): {(-1, 0): "|", (0, -1): "L", (0, 1): "J"},
+}
+lines[si][sj] = mapping[di1, dj1][di2, dj2]
+
+# find the points inside the loop using an adaptation of ray casting for a discrete
+# grid (https://stackoverflow.com/a/218081/2666289)
+#
+# use a set for faster '... in loop' check
+#
+loop_s = set(loop)
+inside: set[tuple[int, int]] = set()
+for i in range(len(lines)):
+    cnt = 0
+    for j in range(len(lines[0])):
+        if (i, j) not in loop_s and cnt % 2 == 1:
+            inside.add((i, j))
+
+        if (i, j) in loop_s and lines[i][j] in "|LJ":
+            cnt += 1
+
+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()
+
+answer_2 = len(inside)
 print(f"answer 2 is {answer_2}")