#!/usr/bin/env python
from common import condense_page_orders, get_middle_page, parse, update_is_correct


def solve(input: tuple[list[tuple[int, int]], list[tuple[int, ...]]]) -> int:
    raw_page_orders, updates = input
    not_before, not_after = condense_page_orders(raw_page_orders)
    middle_pages = map(get_middle_page, filter(lambda u: update_is_correct(u, not_before, not_after), updates))

    return sum(middle_pages)


def main():
    print(solve(parse("input")))


if __name__ == "__main__":
    main()