64 lines
1.4 KiB
Python
64 lines
1.4 KiB
Python
from __future__ import annotations
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import argparse
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import os.path
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import pytest
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import support
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INPUT_TXT = os.path.join(os.path.dirname(__file__), 'input.txt')
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from string import ascii_letters
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def compute(s: str) -> int:
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total_priorities = 0
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lines = s.split('\n')
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common = None
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for idx in range(len(lines) + 1):
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if (idx + 1) % 3 == 0:
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l1, l2, l3 = lines[idx], lines[idx - 1], lines[idx - 2]
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else:
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continue
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for char in l1:
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if char in l2 and char in l3:
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common = char
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break
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if common is None:
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continue
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total_priorities += ascii_letters.find(common) + 1
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return total_priorities
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@pytest.mark.parametrize(
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('input_s', 'expected'),
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(
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('vJrwpWtwJgWrhcsFMMfFFhFp', 'p'),
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('jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL', 'L'),
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('PmmdzqPrVvPwwTWBwg', 'P'),
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('wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn', 'v'),
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('ttgJtRGJQctTZtZT', 't'),
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('CrZsJsPPZsGzwwsLwLmpwMDw', 's'),
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)
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)
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def test(input_s: str, expected: int) -> None:
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assert compute(input_s) == expected
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def main() -> int:
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parser = argparse.ArgumentParser()
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parser.add_argument('data_file', nargs='?', default=INPUT_TXT)
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args = parser.parse_args()
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with open(args.data_file) as f, support.timing():
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print(compute(f.read()))
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return 0
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if __name__ == '__main__':
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raise SystemExit(main())
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