32 lines
722 B
Python
32 lines
722 B
Python
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#!/usr/bin/env python
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import sys
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from collections import defaultdict
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from typing import DefaultDict, List, Set
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def solve(raw: List[str]) -> int:
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answers: DefaultDict[int, Set[str]] = defaultdict(set)
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group = 0
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first = True
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for line in raw:
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if line == "":
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group += 1
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first = True
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continue
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if not first:
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answers[group] &= {char for char in line}
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else:
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answers[group] = {char for char in line}
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first = False
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return sum(len(answer) for answer in answers.values())
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def main() -> None:
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input = [line.strip() for line in sys.stdin.readlines()]
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print(solve(input))
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if __name__ == "__main__":
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main()
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