pub fn day05(input: &str) -> (u64, u64) {
    let mut part1 = 0;
    let mut part2 = 0;
    let mut ranges = Vec::new();
    let mut lines = input.trim().lines();
    for line in lines.by_ref() {
        if line.is_empty() {
            break;
        }
        let range = line
            .split_once('-')
            .map(|(l, h)| [l.parse::<u64>().unwrap(), h.parse::<u64>().unwrap()])
            .unwrap();
        ranges.push(range);
    }
    let ranges = combine_ranges(ranges);
    for idx in lines {
        for r in ranges.iter() {
            if (r[0]..=r[1]).contains(&idx.parse::<u64>().unwrap()) {
                part1 += 1;
                break;
            }
        }
    }
    for r in ranges {
        part2 += r[1] - r[0] + 1;
    }
    (part1, part2)
}

fn combine_ranges(ranges: Vec<[u64; 2]>) -> Vec<[u64; 2]> {
    let mut temp_ranges = ranges;
    let mut comp_ranges: Vec<[u64; 2]> = Vec::new();
    let mut run_again: bool = true;
    while run_again {
        run_again = false;
        comp_ranges = Vec::new();
        'outer: for i in 0..temp_ranges.len() {
            for j in 0..comp_ranges.len() {
                if temp_ranges[i][0] <= comp_ranges[j][0] && comp_ranges[j][1] <= temp_ranges[i][1]
                {
                    //temp covers all of comp
                    comp_ranges[j][0] = temp_ranges[i][0];
                    comp_ranges[j][1] = temp_ranges[i][1];
                    run_again = true;
                    continue 'outer;
                } else if comp_ranges[j][0] <= temp_ranges[i][0]
                    && temp_ranges[i][1] <= comp_ranges[j][1]
                {
                    //comp covers all of temp
                    run_again = true;
                    continue 'outer;
                } else if temp_ranges[i][0] <= comp_ranges[j][0]
                    && comp_ranges[j][0] <= temp_ranges[i][1]
                    && temp_ranges[i][1] <= comp_ranges[j][1]
                {
                    //grow left
                    comp_ranges[j][0] = temp_ranges[i][0];
                    run_again = true;
                    continue 'outer;
                } else if comp_ranges[j][0] <= temp_ranges[i][0]
                    && temp_ranges[i][0] <= comp_ranges[j][1]
                    && comp_ranges[j][1] <= temp_ranges[i][1]
                {
                    //grow right
                    comp_ranges[j][1] = temp_ranges[i][1];
                    run_again = true;
                    continue 'outer;
                }
            }
            comp_ranges.push(temp_ranges[i]);
        }
        temp_ranges = comp_ranges.clone();
    }

    comp_ranges
}