#![feature(iter_next_chunk)]

fn main() {
    part1();
    part2();
}

fn part1() {
    let input = include_str!("../input");

    let mut ans = 0;
    for line in input.lines() {
        let mut split = line
            .split(',')
            .flat_map(|elf| elf.split('-').flat_map(|x| x.parse::<u32>()));
        let b1 = split.next().unwrap();
        let e1 = split.next().unwrap();
        let b2 = split.next().unwrap();
        let e2 = split.next().unwrap();
        let s1 = b1..=e1;
        let s2 = b2..=e2;

        if s1.contains(&b2) && s1.contains(&e2) || s2.contains(&b1) && s2.contains(&e1) {
            ans += 1;
        }
    }

    println!("{}", ans);
}

fn part2() {
    let input = include_str!("../input");

    let mut ans = 0;
    for line in input.lines() {
        let mut split = line
            .split(',')
            .flat_map(|elf| elf.split('-').flat_map(|x| x.parse::<u32>()));
        let b1 = split.next().unwrap();
        let e1 = split.next().unwrap();
        let b2 = split.next().unwrap();
        let e2 = split.next().unwrap();
        let s1 = b1..=e1;
        let s2 = b2..=e2;

        if s1.contains(&b2) || s1.contains(&e2) || s2.contains(&b1) || s2.contains(&e1) {
            ans += 1;
        }
    }

    println!("{}", ans);
}