aoc2023/solve.py

#!/usr/bin/env python3
import sys

sum = 0
for line in sys.stdin:
    _, nums = line.split(":")
    winning, mine = nums.split("|")

    winning = set(winning.split())
    if len(winning) != len(set(winning)):
        raise ValueError("Shenannigans!")

    mine = set(mine.split())
    if len(mine) != len(set(mine)):
        raise ValueError("Shenannigans! {}".format(mine))

    both = winning.intersection(mine)
    c = len(both)
    if c > 0:
        sum += 2 ** (c - 1)

print(sum)