import shared
from collections import Counter


def part1(rows):
    left, right = zip(*(map(int, row.split()) for row in rows))
    print(sum(abs(r - l) for l, r in zip(sorted(left), sorted(right))))


def part2(rows):
    left, right = zip(*(map(int, row.split()) for row in rows))
    right_hist = Counter(right)
    print(sum(l * right_hist[l] for l in left))


def main():
    rows = [row for row in shared.load_rows(1)]
    with shared.elapsed_timer() as elapsed:
        part1(rows)
        print("🕒", elapsed())

    rows = [row for row in shared.load_rows(1, True)]
    with shared.elapsed_timer() as elapsed:
        part2(rows)
        print("🕒", elapsed())


if __name__ == "__main__":
    main()