54 lines
1.4 KiB
Python
Executable file
54 lines
1.4 KiB
Python
Executable file
#! /usr/bin/env python3
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import pathlib
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import sys
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# import parse
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def parse(puzzle_input):
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"""Parse input"""
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return [int(string) for string in puzzle_input.splitlines()]
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def part1(data:list[int]):
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"""Solve part 1"""
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data.sort()
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while True:
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if len(data)<2:
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raise ValueError('no match found')
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s = data[0]+data[-1]
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if s>2020:
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data.pop(-1)
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elif s<2020:
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data.pop(0)
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else:
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return data[0]*data[-1]
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def part2(data):
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"""Solve part 2"""
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data.sort()
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while True:
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if len(data)<3:
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raise ValueError('no match found')
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if data[0]+data[1]+data[-1]>2020:
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data.pop(-1)
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elif data[0]+data[-1]+data[-2]<2020:
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data.pop(0)
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elif data[0]+data[1]+data[-1]==2020:
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return data[0]*data[1]*data[-1]
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else:
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return data[0]*data[-1]*data[-2]
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def solve(puzzle_input):
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"""Solve the puzzle for the given input"""
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data = parse(puzzle_input)
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solution1 = part1(data.copy())
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solution2 = part2(data.copy())
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return solution1, solution2
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if __name__ == "__main__":
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for path in sys.argv[1:]:
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print(f"{path}:")
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puzzle_input = pathlib.Path(path).read_text().strip()
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solutions = solve(puzzle_input)
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print("\n".join(str(solution) for solution in solutions))
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