2024 day 24.

src/holt59/aoc/2024/day24.py

@@ -1,7 +1,170 @@
-from typing import Any, Iterator
+from dataclasses import dataclass
+from typing import Any, Iterator, Literal, TypeAlias, cast
 
 from ..base import BaseSolver
 
+GateType: TypeAlias = Literal["and", "or", "xor"]
+
+
+@dataclass(frozen=True, eq=True)
+class Gate:
+    type: GateType
+    lhs: str
+    rhs: str
+
+    def __call__(self, lhs: int, rhs: int) -> Any:
+        match self.type:
+            case "or":
+                return int(lhs or rhs)
+            case "and":
+                return int(lhs and rhs)
+            case "xor":
+                return int(lhs != rhs)
+
 
 class Solver(BaseSolver):
-    def solve(self, input: str) -> Iterator[Any]: ...
+    def solve(self, input: str) -> Iterator[Any]:
+        inputs_s, gates_s = input.split("\n\n")
+
+        wires: dict[str, int | None] = {}
+        for row in inputs_s.splitlines():
+            parts = row.split(": ")
+            wires[parts[0]] = int(parts[1])
+
+        gates: dict[str, Gate] = {}
+        for row in gates_s.splitlines():
+            parts = row.split()
+            assert parts[4] not in gates
+            assert parts[4] not in wires
+
+            lhs, rhs = sorted([parts[0], parts[2]])
+
+            gates[parts[4]] = Gate(cast(GateType, parts[1].lower()), lhs, rhs)
+            wires[parts[4]] = None
+
+        if self.files:
+            content = "digraph G {\n"
+            for wire in wires:
+                content += f'{wire} [label="{wire}"]\n'
+            for wire, gate in gates.items():
+                gate_n = f"G_{wire}"
+                content += f'{gate_n} [label="{gate.type.upper()}"]\n'
+                content += f"{gate.lhs} -> {gate_n}\n"
+                content += f"{gate.rhs} -> {gate_n}\n"
+                content += f"{gate_n} -> {wire}\n"
+            content += "}\n"
+            self.files.create("gates.dot", content.encode(), text=False)
+
+        wires_to_find = set(gates)
+
+        while wires_to_find:
+            wires_found: list[str] = []
+            for wire in wires_to_find:
+                gate = gates[wire]
+
+                lhs, rhs = wires[gate.lhs], wires[gate.rhs]
+
+                if lhs is None or rhs is None:
+                    continue
+
+                assert wires[wire] is None
+                wires[wire] = gate(lhs, rhs)
+
+                wires_found.append(wire)
+
+            wires_to_find.difference_update(wires_found)
+
+        z_wires = sorted((wire for wire in wires if wire.startswith("z")))
+        self.logger.info(
+            "binary value is '{}'".format(
+                "".join(str(wires[w]) for w in reversed(z_wires))
+            )
+        )
+        yield int("".join(str(wires[w]) for w in reversed(z_wires)), base=2)
+
+        # e00 = x00 ^ y00
+        # z00 = e00
+        # r00 = x00 & y00
+
+        # e01 = x01 ^ y01
+        # z01 = r00 ^ e01
+        # a01 = x01 & y01
+        # b01 = r00 & e01
+        # r01 = a01 | (r00 & e01)
+
+        assert gates["z00"] == Gate("xor", "x00", "y00")
+
+        # normalized names -> gate name
+        m_gates: dict[str, str] = {}
+
+        def find_gate(type: GateType, lhs: str, rhs: str):
+            try:
+                return next(
+                    wire
+                    for wire, gate in gates.items()
+                    if gate.type == type
+                    and {gate.lhs, gate.rhs}
+                    == {m_gates.get(lhs, lhs), m_gates.get(rhs, rhs)}
+                )
+            except StopIteration as ex:
+                self.logger.info(
+                    f"gate {lhs} [{m_gates.get(lhs, lhs)}] {type} {rhs} [{m_gates.get(rhs, rhs)}] not found"
+                )
+                raise ex
+
+        # find the r00 gate (= x00 & y00)
+        m_gates["r00"] = find_gate("and", "x00", "y00")
+
+        swapped: list[str] = []
+
+        for i_wire, z_wire in enumerate(z_wires[1:-1], start=1):
+            i2d = f"{i_wire:02d}"
+            r0n = f"r{i_wire - 1:02d}"
+            m_gates[f"e{i2d}"] = find_gate("xor", f"x{i2d}", f"y{i2d}")
+
+            try:
+                z_gate = find_gate("xor", r0n, f"e{i2d}")
+            except StopIteration:
+                # gate xor not found -> one of the input gate has been swapped
+                #
+                # assume there is a XOR gate with the remainder, so it is the other
+                # input that has been swapped
+                assert gates[z_wire].type == "xor"
+                assert m_gates.get(r0n, r0n) in (gates[z_wire].lhs, gates[z_wire].rhs)
+
+                wrong_wire_1 = (
+                    gates[z_wire].lhs
+                    if gates[z_wire].rhs == m_gates.get(r0n, r0n)
+                    else gates[z_wire].rhs
+                )
+                wrong_wire_2 = m_gates[f"e{i2d}"]
+
+                # we are going to fix all the gates (there is probably only 2 but
+                # eh...) whose wires needs to be swapped
+
+                self.logger.info(f"swapping {wrong_wire_1} <> {wrong_wire_2}")
+                switch = {wrong_wire_1: wrong_wire_2, wrong_wire_2: wrong_wire_1}
+
+                for wire, gate in list(gates.items()):
+                    lhs, rhs = (
+                        switch.get(gate.lhs, gate.lhs),
+                        switch.get(gate.rhs, gate.rhs),
+                    )
+                    if lhs != gate.lhs or rhs != gate.rhs:
+                        gates[wire] = Gate(gate.type, lhs, rhs)
+
+                swapped.extend((wrong_wire_1, wrong_wire_2))
+
+                z_gate = find_gate("xor", r0n, f"e{i2d}")
+
+            if z_gate != z_wire:
+                self.logger.info(f"swapping {z_gate} <> {z_wire}")
+                gates[z_gate], gates[z_wire] = gates[z_wire], gates[z_gate]
+                swapped.extend((z_gate, z_wire))
+
+            m_gates[f"a{i2d}"] = find_gate("and", f"x{i2d}", f"y{i2d}")
+            m_gates[f"b{i2d}"] = find_gate("and", r0n, f"e{i2d}")
+            m_gates[f"r{i2d}"] = find_gate("or", f"a{i2d}", f"b{i2d}")
+
+        assert len(swapped) == 8
+        yield ",".join(sorted(swapped))

src/holt59/aoc/__main__.py

@@ -12,10 +12,29 @@ from .utils.files import SimpleFileHandler
 from .utils.progress import ProgressNone, ProgressTQDM
 
 
+def find_input_file(folder: Path, day: int, target: Path | None):
+    if (path := folder.joinpath(f"day{day}.txt")).exists():
+        return path
+
+    if (
+        target is not None
+        and (path := folder.joinpath(f"day{day}_v{target}.txt")).exists()
+    ):
+        return path
+
+    try:
+        return next(path for path in sorted(folder.glob(f"day{day}*.txt")))
+    except StopIteration:
+        ...
+
+    return folder.joinpath(f"day{day}.txt")
+
+
 def main():
     parser = argparse.ArgumentParser("Holt59 Advent-Of-Code Runner")
     parser.add_argument("-v", "--verbose", action="store_true", help="verbose mode")
     parser.add_argument("-t", "--test", action="store_true", help="test mode")
+
     parser.add_argument("-a", "--api", action="store_true", help="API mode")
     parser.add_argument(
         "-o",
@@ -61,9 +80,13 @@ def main():
         handlers=[LoggerAPIHandler()] if api else None,
     )
 
-    if input_path is None:
-        input_path = Path(__file__).parent.joinpath(
-            "inputs", "tests" if test else user, str(year), f"day{day}.txt"
+    if input_path is None or not input_path.exists():
+        input_path = find_input_file(
+            Path(__file__).parent.joinpath(
+                "inputs", "tests" if test else user, str(year)
+            ),
+            day,
+            input_path,
         )
     assert input_path.exists(), f"{input_path} missing"
 

src/holt59/aoc/inputs/holt59/2024/day24.txt

@@ -0,0 +1,313 @@
+x00: 1
+x01: 0
+x02: 1
+x03: 1
+x04: 0
+x05: 0
+x06: 1
+x07: 1
+x08: 0
+x09: 1
+x10: 1
+x11: 1
+x12: 1
+x13: 0
+x14: 1
+x15: 1
+x16: 1
+x17: 1
+x18: 1
+x19: 1
+x20: 0
+x21: 1
+x22: 0
+x23: 1
+x24: 0
+x25: 1
+x26: 1
+x27: 1
+x28: 1
+x29: 0
+x30: 0
+x31: 1
+x32: 0
+x33: 1
+x34: 1
+x35: 0
+x36: 0
+x37: 1
+x38: 0
+x39: 1
+x40: 1
+x41: 1
+x42: 1
+x43: 0
+x44: 1
+y00: 1
+y01: 0
+y02: 0
+y03: 1
+y04: 1
+y05: 0
+y06: 0
+y07: 0
+y08: 0
+y09: 0
+y10: 0
+y11: 1
+y12: 0
+y13: 1
+y14: 0
+y15: 1
+y16: 1
+y17: 1
+y18: 1
+y19: 0
+y20: 0
+y21: 1
+y22: 1
+y23: 1
+y24: 1
+y25: 0
+y26: 0
+y27: 1
+y28: 1
+y29: 1
+y30: 1
+y31: 0
+y32: 0
+y33: 0
+y34: 1
+y35: 1
+y36: 1
+y37: 0
+y38: 1
+y39: 1
+y40: 1
+y41: 1
+y42: 0
+y43: 1
+y44: 1
+
+x03 AND y03 -> htr
+gwb AND kvf -> pkd
+x04 AND y04 -> jjm
+qcm XOR twv -> z21
+rrq XOR bmp -> z44
+x43 AND y43 -> pnn
+x06 XOR y06 -> qmt
+x26 AND y26 -> z26
+y00 AND x00 -> whb
+jfq XOR fbb -> z36
+y33 AND x33 -> mmb
+x38 AND y38 -> vqt
+bbh OR qtd -> jfq
+cbs AND ttb -> qtd
+wqs OR cmf -> tpf
+x10 AND y10 -> bfm
+djp OR pfb -> qvr
+x20 XOR y20 -> vhb
+kkd XOR cjg -> z32
+qpp XOR stg -> z41
+kkd AND cjg -> mdv
+tpp OR pfj -> twv
+www AND qdf -> vjf
+y15 XOR x15 -> hmr
+mtg XOR sqm -> z09
+x33 XOR y33 -> chc
+x41 AND y41 -> pkj
+x31 AND y31 -> cvn
+x09 AND y09 -> nvw
+mtg AND sqm -> chg
+pkr AND kcv -> thc
+x07 XOR y07 -> cds
+x15 AND y15 -> fpr
+mwv AND jsg -> wdw
+mwv XOR jsg -> z38
+y16 XOR x16 -> svs
+y14 XOR x14 -> fnq
+wth OR vjf -> btv
+bvp AND gdb -> stc
+cjb XOR rjc -> z04
+x13 AND y13 -> pfb
+x30 AND y30 -> qgf
+htq AND rtk -> dsm
+x18 XOR y18 -> kvf
+y12 AND x12 -> mqn
+bcj XOR bkh -> z03
+x07 AND y07 -> sdj
+bdf OR wbw -> qkf
+y30 XOR x30 -> kbn
+tpf AND vhb -> tpp
+hqd OR fpr -> hgh
+vfm XOR hbw -> z23
+x01 AND y01 -> bdf
+nvw OR chg -> vgp
+x21 XOR y21 -> qcm
+bwg AND mfn -> djp
+dnf OR pkj -> ksp
+y44 AND x44 -> gqr
+y11 AND x11 -> smr
+smr OR dsm -> ksn
+jkm OR pkd -> rjf
+thc OR sqt -> rbd
+qvr XOR fnq -> z14
+cjb AND rjc -> fsb
+svg XOR fmt -> z31
+x06 AND y06 -> ssv
+dtj OR vvq -> jvp
+chv XOR fqf -> z34
+cvr AND hck -> pjd
+dqp AND nbm -> hvv
+x29 AND y29 -> vvq
+y13 XOR x13 -> mfn
+ksn AND nft -> z12
+jjd XOR whb -> z01
+chc AND rnq -> vjh
+y36 AND x36 -> kfn
+cwh OR vvw -> ttb
+qkf AND wsv -> pqc
+rdj OR kfv -> gdb
+x08 AND y08 -> jrr
+x02 AND y02 -> vdf
+x12 XOR y12 -> nft
+ptf OR jrr -> sqm
+tdv OR wjp -> cjw
+qvr AND fnq -> mch
+x28 XOR y28 -> cfj
+gtn XOR qmt -> z06
+mqn OR jpj -> bwg
+x36 XOR y36 -> fbb
+qht OR bfm -> htq
+y42 AND x42 -> mkg
+ksn XOR nft -> jpj
+x20 AND y20 -> pfj
+cmt AND nbq -> gmc
+rbd XOR knm -> z25
+pvj XOR ksp -> z42
+kgj OR stc -> www
+tpf XOR vhb -> z20
+pjd OR dsg -> mwv
+cbs XOR ttb -> z35
+bfk OR jvm -> gwb
+ffj XOR rpg -> z17
+vjr OR kwg -> pkr
+pvj AND ksp -> dkc
+y37 XOR x37 -> cvr
+btv XOR cfj -> z28
+gtq OR qgf -> fmt
+nbq XOR cmt -> z39
+wgq AND dqj -> tws
+x24 AND y24 -> sqt
+whj OR pnn -> bmp
+x02 XOR y02 -> wsv
+stg AND qpp -> dnf
+kbn XOR jvp -> z30
+y39 AND x39 -> gwq
+cds AND rkv -> nph
+kvf XOR gwb -> z18
+mkg OR dkc -> sch
+bqh XOR rjf -> z19
+hck XOR cvr -> z37
+jmk OR ssv -> rkv
+x21 AND y21 -> cgd
+pqc OR vdf -> bkh
+rff OR mts -> rpg
+bkh AND bcj -> rhq
+bnv OR bst -> stg
+bwg XOR mfn -> z13
+sgt AND scc -> bnv
+btv AND cfj -> tdv
+svs AND hgh -> rff
+hbw AND vfm -> kwg
+x40 XOR y40 -> scc
+y17 AND x17 -> jvm
+y34 AND x34 -> chv
+y35 AND x35 -> bbh
+mdv OR rft -> rnq
+fqf AND chv -> cwh
+y28 AND x28 -> wjp
+sch AND srj -> whj
+htr OR rhq -> rjc
+x05 XOR y05 -> dqp
+cvn OR qnk -> cjg
+y14 AND x14 -> tfr
+y11 XOR x11 -> rtk
+jfq AND fbb -> trr
+ppb AND hmr -> hqd
+gtb OR hvv -> gtn
+y44 XOR x44 -> rrq
+rtk XOR htq -> z11
+x01 XOR y01 -> jjd
+hmv XOR rts -> z08
+y10 XOR x10 -> vpc
+jvp AND kbn -> gtq
+cjw AND ntj -> dtj
+x22 AND y22 -> prp
+ppb XOR hmr -> z15
+y18 AND x18 -> jkm
+x39 XOR y39 -> nbq
+jjd AND whb -> wbw
+x34 XOR y34 -> vvw
+x19 AND y19 -> wqs
+gwq OR gmc -> sgt
+rbd AND knm -> rdj
+srj XOR sch -> z43
+y05 AND x05 -> gtb
+x08 XOR y08 -> hmv
+y25 AND x25 -> kfv
+cgd OR jth -> dqj
+vpc XOR vgp -> z10
+tws OR prp -> hbw
+jjm OR fsb -> nbm
+wdw OR vqt -> cmt
+rrq AND bmp -> cbv
+rts AND hmv -> ptf
+svs XOR hgh -> z16
+y41 XOR x41 -> qpp
+ntj XOR cjw -> z29
+ffj AND rpg -> bfk
+gqr OR cbv -> z45
+x25 XOR y25 -> knm
+chc XOR rnq -> z33
+y43 XOR x43 -> srj
+vgp AND vpc -> qht
+x00 XOR y00 -> z00
+cds XOR rkv -> rts
+x24 XOR y24 -> kcv
+x32 AND y32 -> rft
+nbm XOR dqp -> z05
+x35 XOR y35 -> cbs
+mch OR tfr -> ppb
+x16 AND y16 -> mts
+www XOR qdf -> z27
+x23 AND y23 -> vjr
+x26 XOR y26 -> bvp
+gtn AND qmt -> jmk
+x29 XOR y29 -> ntj
+y19 XOR x19 -> bqh
+rjf AND bqh -> cmf
+y38 XOR x38 -> jsg
+x32 XOR y32 -> kkd
+y03 XOR x03 -> bcj
+y31 XOR x31 -> svg
+y22 XOR x22 -> wgq
+qkf XOR wsv -> z02
+bvp XOR gdb -> kgj
+x04 XOR y04 -> cjb
+x17 XOR y17 -> ffj
+y37 AND x37 -> dsg
+y27 AND x27 -> wth
+y23 XOR x23 -> vfm
+sgt XOR scc -> z40
+mmb OR vjh -> fqf
+qcm AND twv -> jth
+y09 XOR x09 -> mtg
+sdj OR nph -> z07
+wgq XOR dqj -> z22
+trr OR kfn -> hck
+y27 XOR x27 -> qdf
+kcv XOR pkr -> z24
+x42 XOR y42 -> pvj
+x40 AND y40 -> bst
+svg AND fmt -> qnk

src/holt59/aoc/inputs/tests/2024/day15_v2.txt

@@ -0,0 +1,10 @@
+########
+#..O.O.#
+##@.O..#
+#...O..#
+#.#.O..#
+#...O..#
+#......#
+########
+
+<^^>>>vv<v>>v<<

src/holt59/aoc/inputs/tests/2024/day15_v3.txt

@@ -0,0 +1,9 @@
+#######
+#...#.#
+#.....#
+#..OO@#
+#..O..#
+#.....#
+#######
+
+<vv<<^^<<^^

src/holt59/aoc/inputs/tests/2024/day24_v1.txt

@@ -0,0 +1,10 @@
+x00: 1
+x01: 1
+x02: 1
+y00: 0
+y01: 1
+y02: 0
+
+x00 AND y00 -> z00
+x01 XOR y01 -> z01
+x02 OR y02 -> z02

src/holt59/aoc/inputs/tests/2024/day24_v2.txt

@@ -0,0 +1,47 @@
+x00: 1
+x01: 0
+x02: 1
+x03: 1
+x04: 0
+y00: 1
+y01: 1
+y02: 1
+y03: 1
+y04: 1
+
+ntg XOR fgs -> mjb
+y02 OR x01 -> tnw
+kwq OR kpj -> z05
+x00 OR x03 -> fst
+tgd XOR rvg -> z01
+vdt OR tnw -> bfw
+bfw AND frj -> z10
+ffh OR nrd -> bqk
+y00 AND y03 -> djm
+y03 OR y00 -> psh
+bqk OR frj -> z08
+tnw OR fst -> frj
+gnj AND tgd -> z11
+bfw XOR mjb -> z00
+x03 OR x00 -> vdt
+gnj AND wpb -> z02
+x04 AND y00 -> kjc
+djm OR pbm -> qhw
+nrd AND vdt -> hwm
+kjc AND fst -> rvg
+y04 OR y02 -> fgs
+y01 AND x02 -> pbm
+ntg OR kjc -> kwq
+psh XOR fgs -> tgd
+qhw XOR tgd -> z09
+pbm OR djm -> kpj
+x03 XOR y03 -> ffh
+x00 XOR y04 -> ntg
+bfw OR bqk -> z06
+nrd XOR fgs -> wpb
+frj XOR qhw -> z04
+bqk OR frj -> z07
+y03 OR x01 -> nrd
+hwm AND bqk -> z03
+tgd XOR rvg -> z12
+tnw OR pbm -> gnj

src/holt59/aoc/inputs/tests/2024/day24_v3.txt

@@ -0,0 +1,19 @@
+x00: 0
+x01: 1
+x02: 0
+x03: 1
+x04: 0
+x05: 1
+y00: 0
+y01: 0
+y02: 1
+y03: 1
+y04: 0
+y05: 1
+
+x00 AND y00 -> z05
+x01 AND y01 -> z02
+x02 AND y02 -> z01
+x03 AND y03 -> z03
+x04 AND y04 -> z04
+x05 AND y05 -> z00