import re

lines = (x.strip() for x in open("input.txt"))
mem = {}
regex_mask = re.compile(r"mask = (.+)")
regex_mem = re.compile(r"mem\[(.+)] = (.+)")
mask_and = 0
mask_or = -1

for line in lines:
    match = regex_mask.match(line)
    if match is not None:
        mask = match.group(1)
        mask_and = int(mask.replace('X', '1'), 2)
        mask_or = int(mask.replace('X', '0'), 2)
    else:
        match = regex_mem.match(line)
        addr, dec = list(map(int, match.groups()))
        mem[addr] = dec & mask_and | mask_or

print(sum(mem.values()))