2020-12-02 12:08:44 +01:00
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# SPDX-License-Identifier: MIT
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# Copyright (c) 2020 Akumatic
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2020-12-01 14:15:35 +01:00
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""" https://adventofcode.com/2020/day/1 """
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def readFile() -> list:
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with open(f"{__file__.rstrip('code.py')}input.txt", "r") as f:
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return [int(line[:-1]) for line in f.readlines()]
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def part1(vals: list) -> int:
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for val in vals:
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if (2020 - val) in vals:
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return (2020 - val) * val
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def part2(vals: list) -> int:
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for i in range(len(vals)):
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for j in range(i, len(vals)):
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if (2020 - vals[i] - vals[j]) in vals:
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return vals[i] * vals[j] * (2020 - vals[i] - vals[j])
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def test():
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test_input = [1721, 979, 366, 299, 675, 1456]
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assert part1(test_input) == 514579
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assert part2(test_input) == 241861950
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if __name__ == "__main__":
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test()
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vals = readFile()
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print(f"Part 1: {part1(vals)}")
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print(f"Part 2: {part2(vals)}")
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