day14_1():
    with open("input.txt", "r") as file:
        data = file.readlines()

    mem = {}
    on_mask = 0
    off_mask = 0
    for line in data:
        if line[1] == "a":  # Mask
            mask = line[7:-1]
            on_mask = int(mask.replace("X", "0"), base=2)   # OR to set 1s
            off_mask = int(mask.replace("X", "1"), base=2)   # AND to set 0s
        else:
            addr = line[line.find("[")+1:line.find("]")]
            val = int(line[line.find("=")+2:-1])

            mem[addr] = (val | on_mask) & off_mask

    total = 0
    for k, v in mem.items():
        total += v

    return total