#[path = "../lib.rs"] mod lib;

fn parse(line: String) -> Option<(u8, u8, u8, u8)> {
    let (a, b) = lib::split_once(&line, ',')?;
    let (a1, a2) = lib::split_once(a, '-')?;
    let (b1, b2) = lib::split_once(b, '-')?;
    return Some((
        a1.parse::<u8>().ok()?,
        a2.parse::<u8>().ok()?,
        b1.parse::<u8>().ok()?,
        b2.parse::<u8>().ok()?,
    ));
}

fn part1() -> u64 {
    let mut count = 0;

    for line in lib::iter_input() {
        let (a1, a2, b1, b2) = parse(line).unwrap();
        if (a1 <= b1 && a2 >= b2) || (b1 <= a1 && b2 >= a2) {
            count += 1;
        }
    }

    return count;
}

fn part2() -> u64 {
    let mut count = 0;

    for line in lib::iter_input() {
        let (a1, a2, b1, b2) = parse(line).unwrap();
        if a1 <= b2 && a2 >= b1 {
            count += 1;
        }
    }

    return count;
}

fn main() {
    println!("part1: {}", part1());
    println!("part2: {}", part2());
}