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Solve day 11 part 2
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1 changed files with 27 additions and 19 deletions
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@ -1,6 +1,7 @@
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from __future__ import annotations
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import dataclasses
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from math import lcm
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def main(filename: str, expected_part_1: int = None, expected_part_2: int = None):
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@ -8,14 +9,15 @@ def main(filename: str, expected_part_1: int = None, expected_part_2: int = None
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with open(filename) as f:
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data = f.read().strip().split("\n\n")
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data = parse_data(data)
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solution_part_1 = solve_part_1(data)
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data_1 = parse_data(data)
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solution_part_1 = solve_part_1(data_1)
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print(f"1. Found {solution_part_1}")
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if expected_part_1:
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assert expected_part_1 == solution_part_1
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solution_part_2 = solve_part_2(data)
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data_2 = parse_data(data)
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solution_part_2 = solve_part_2(data_2)
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print(f"2. Found {solution_part_2}")
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if expected_part_2:
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assert expected_part_2 == solution_part_2
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@ -27,13 +29,17 @@ class Operation:
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adder: int = 0
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square: bool = False
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def compute(self, value: int) -> int:
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def compute(self, value: int, worry_decreases: bool, divider: int) -> int:
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if self.square:
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value = value * value
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else:
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value = value * self.multiplier + self.adder
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return int(value / 3)
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if worry_decreases:
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value = int(value / divider)
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else:
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value %= divider
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return value
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@dataclasses.dataclass
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@ -80,10 +86,10 @@ class Monkey:
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game.monkeys.append(monkey)
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return monkey
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def play_round(self) -> None:
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def play_round(self, worry_decreases: bool) -> None:
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self.inspected_items += len(self.items)
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for item in self.items:
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new_value = self.operation.compute(item)
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new_value = self.operation.compute(item, worry_decreases, self.game.divider)
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if new_value % self.divisible_by == 0:
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self.throw(self.true_monkey, new_value)
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else:
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@ -100,10 +106,11 @@ class Monkey:
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@dataclasses.dataclass
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class Game:
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monkeys: list[Monkey] = dataclasses.field(default_factory=list)
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divider: int = 3
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def play_round(self) -> None:
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def play_round(self, worry_decreases: bool) -> None:
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for monkey in self.monkeys:
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monkey.play_round()
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monkey.play_round(worry_decreases)
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def get_ranked_monkeys(self) -> list[Monkey]:
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return sorted(
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@ -116,27 +123,28 @@ class Game:
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monkey.print()
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DataType = Game
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def parse_data(data: list[str]) -> DataType:
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def parse_data(data: list[str]) -> Game:
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game = Game()
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for text in data:
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Monkey.from_input(text, game)
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return game
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def solve_part_1(game: DataType) -> int:
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def solve_part_1(game: Game) -> int:
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for _ in range(1, 21):
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game.play_round()
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game.play_round(worry_decreases=True)
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sorted_monkeys = game.get_ranked_monkeys()
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return sorted_monkeys[0].inspected_items * sorted_monkeys[1].inspected_items
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def solve_part_2(data: DataType) -> int:
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return 0
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def solve_part_2(game: Game) -> int:
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game.divider = lcm(*(monkey.divisible_by for monkey in game.monkeys))
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for _ in range(1, 10_001):
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game.play_round(worry_decreases=False)
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sorted_monkeys = game.get_ranked_monkeys()
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return sorted_monkeys[0].inspected_items * sorted_monkeys[1].inspected_items
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if __name__ == "__main__":
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main("inputs/day11-test1", expected_part_1=10605)
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main("inputs/day11", expected_part_1=95472)
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main("inputs/day11-test1", expected_part_1=10605, expected_part_2=2713310158)
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main("inputs/day11", expected_part_1=95472, expected_part_2=17926061332)
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