#!/usr/bin/env python import sys from dataclasses import dataclass from typing import Dict, List, Set @dataclass class Entry: signals: List[Set[str]] outputs: List[Set[str]] def solve(input: List[str]) -> int: def parse_entry(input: str) -> Entry: signals, outputs = input.split(" | ") return Entry( [set(s) for s in signals.split()], [set(o) for o in outputs.split()] ) def deduce_signals(entry: Entry) -> Dict[int, Set[str]]: _1, _7, _4, *signals_to_deduce, _8 = sorted(entry.signals, key=len) signals = { 1: _1, 4: _4, 7: _7, 8: _8, } for sig in signals_to_deduce: match = len(sig), len(sig & _4), len(sig & _1) if match == (6, 3, 2): signals[0] = sig elif match == (5, 2, 1): signals[2] = sig elif match == (5, 3, 2): signals[3] = sig elif match == (5, 3, 1): signals[5] = sig elif match == (6, 3, 1): signals[6] = sig elif match == (6, 4, 2): signals[9] = sig else: assert False # Sanity check assert len(signals) == 10 # Sanity check return signals def deduce_entry(entry: Entry) -> int: decoded_signals = deduce_signals(entry) res = 0 for output in entry.outputs: assert output in decoded_signals.values() # Sanity check for n, signal in decoded_signals.items(): if output != signal: continue res = res * 10 + n return res entries = [parse_entry(line) for line in input] return sum(map(deduce_entry, entries)) def main() -> None: input = [line.strip() for line in sys.stdin.readlines()] print(solve(input)) if __name__ == "__main__": main()