#!/usr/bin/env python3.11
import re
from dataclasses import dataclass

input_file = "input.txt"


@dataclass
class Card:
    winning_numbers: list[int]
    numbers: list[int]
    copies: int

    def __hash__(self):
        return (self.copies, self.winning_numbers, self.numbers).__hash__()


with open(input_file) as input:
    raw_cards = input.readlines()

cards = [Card(winning_numbers=[], numbers=[], copies=1) for i in range(len(raw_cards))]

for line in raw_cards:
    if match := re.match("Card +(\d+): (.*) \| (.*)", line):
        card_no = int(match.group(1)) - 1
        cards[card_no].winning_numbers = list(map(int, re.split(" +", match.group(2).lstrip(" "))))
        cards[card_no].numbers = map(int, re.split(" +", match.group(3).lstrip(" ")))
        next_no = card_no + 1
        for number in cards[card_no].numbers:
            if number in cards[card_no].winning_numbers:
                if len(cards) > next_no - 1:
                    cards[next_no].copies += cards[card_no].copies
                    next_no += 1

the_sum = sum(map(lambda c: c.copies, cards))


print(the_sum)