with open("input_day4.txt") as file:
    lines = [line.rstrip() for line in file]


winning_numbers = [line.split(": ")[1].split(" | ")[0].split(" ") for line in lines]
winning_numbers = [list(filter(lambda a: a != '', winning_numbers[i])) for i in range(len(winning_numbers))]

numbers_have = [line.split(": ")[1].split(" | ")[1].split(" ") for line in lines]
numbers_have = [list(filter(lambda a: a != '', numbers_have[i])) for i in range(len(numbers_have))]

index = 0
sum = 0
for card in winning_numbers:
    card_matches = 0
    for number in card:
        if str(number) in numbers_have[index]:
            card_matches+=1
    index+=1
    print(f"{card_matches}")
    if card_matches>0:
        sum+=pow(2,card_matches-1)
print(sum)