#!/usr/bin/python3

from pprint import pprint
import re

def all_values(v, mask_1, mask_float):
    if mask_float:
        t = mask_float
        t |= t >> 1
        t |= t >> 2
        t |= t >> 4
        t |= t >> 8
        t |= t >> 16
        t |= t >> 32
        hi = t - (t >> 1)
        return all_values(v | hi, mask_1, mask_float & ~hi) + all_values(v & ~hi, mask_1, mask_float & ~hi)
    else:
        return [v | mask_1]

mem = {}
with open("input") as fh:
    for ln in fh:
        if m := re.match(r"mask = ([01X]{36})", ln):
            mask = m.group(1)
            mask_1 = int(mask.replace("X", "0"), base=2)
            mask_float = int(mask.replace("1", "0").replace("X", "1"), base=2)
        elif m:= re.match(r"mem\[(\d+)\] = (\d+)", ln):
            i = int(m.group(1))
            v = int(m.group(2))
            for i in all_values(i, mask_1, mask_float):
                mem[i] = v
        else:
            raise RuntimeError(ln)
print(sum(mem.values()))