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#!/usr/bin/env python3
def bitmask(mask: str, num: int) -> int:
binary = bin(num)[2:]
binary = "0" * (36 - len(binary)) + binary
res = ""
for i in range(len(binary)):
if binary[i] == "1" and mask[i] == "0":
res += "0"
elif binary[i] == "0" and mask[i] == "1":
res += "1"
else:
res += binary[i]
return int(res, 2)
def main() -> None:
with open("input", "r", encoding="utf-8") as f:
lines = f.read().splitlines()
mem: dict[str, int] = {}
mask = ""
for line in lines:
match line.split(" "):
case ["mask", _, mask]:
mask = mask
case [addr, _, val]:
mem[addr[4:-1]] = bitmask(mask, int(val))
print(sum(mem.values()))
if __name__ == "__main__":
main()
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