33 lines
677 B
Python
Executable file
33 lines
677 B
Python
Executable file
#!/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 Dict, List
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def make_chain(adapters: List[int]) -> int:
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adapters = sorted(adapters)
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output = 0
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device = adapters[-1] + 3
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jolts: Dict[int, int] = defaultdict(int)
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for adapter in adapters:
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delt = adapter - output
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jolts[delt] += 1
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output = adapter
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jolts[device - output] += 1
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return jolts[1] * jolts[3]
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def solve(raw: List[str]) -> int:
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return make_chain([int(line) for line in raw])
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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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