39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
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# SPDX-License-Identifier: MIT
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# Copyright (c) 2022 Akumatic
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#
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# https://adventofcode.com/2022/day/5
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def read_file(filename: str = "input.txt") -> tuple:
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with open(f"{__file__.rstrip('code.py')}{filename}", "r") as f:
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lines = f.read().split("\n\n")
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crates_input = lines[0].split("\n")
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amount = int(crates_input.pop()[-2])
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stacks = []
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for i in range(amount):
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stack = [stack[(i*4)+1] for stack in crates_input if stack[(i*4)+1] != " "]
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stack.reverse()
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stacks.append(stack)
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move_input = [line.replace("move ", "").replace(" from ", " ").replace(" to ", " ")
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for line in lines[1].strip().split("\n")]
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moves = [[int(i) for i in move.split(" ")] for move in move_input]
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return stacks, moves
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def part1(stacks: list, moves: list) -> str:
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stacks_cp = [stack[:] for stack in stacks]
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for move in moves:
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for _ in range(move[0]):
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stacks_cp[move[2] - 1].append(stacks_cp[move[1] - 1].pop())
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return "".join(stack[-1] for stack in stacks_cp)
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def part2(stacks: list, moves: list) -> str:
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stacks_cp = [stack[:] for stack in stacks]
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for move in moves:
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stacks_cp[move[2] - 1].extend(stacks_cp[move[1] - 1][-move[0]:])
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stacks_cp[move[1] - 1] = stacks_cp[move[1] - 1][:-move[0]]
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return "".join(stack[-1] for stack in stacks_cp)
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if __name__ == "__main__":
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vals = read_file()
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print(f"Part 1: {part1(*vals)}")
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print(f"Part 2: {part2(*vals)}")
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