32 lines
948 B
Python
32 lines
948 B
Python
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# SPDX-License-Identifier: MIT
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# Copyright (c) 2021 Akumatic
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#
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# https://adventofcode.com/2021/day/06
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def read_file(filename: str = "input.txt") -> list:
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with open(f"{__file__.rstrip('code.py')}{filename}", "r") as f:
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return [int(x) for x in f.read().strip().split(",")]
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def part1(vals: list, days: int = 80) -> int:
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fishes = vals[:]
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for _ in range(days):
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for i in range(len(fishes)):
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if fishes[i] == 0:
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fishes[i] = 6
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fishes.append(8)
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else:
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fishes[i] -= 1
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return len(fishes)
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def part2(vals: list, days: int = 256) -> int:
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fishes = [vals.count(x) for x in range(9)]
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for _ in range(days):
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tmp = fishes[0]
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fishes = fishes[1:] + [tmp]
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fishes[6] += tmp
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return sum(fishes)
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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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