AOC 2024 Day 11

main.rs

fn main() {
    let s = "125 17";
    
    let mut data: Vec<_> = s.split(" ").map(|x| { x.parse::<usize>().unwrap() }).collect();
    let mut len = data.len();
    
    // println!("{:?}", data);
    
    for _ in (0..).take(75) {
    // println!("len: {len}");
    let mut i = 0;
    while i < len {
        match data[i] {
            0 => { data[i] = 1 },
            j => {
                let digits = j.ilog10() + 1;
                
                if digits % 2 == 0 {
                    let split = digits / 2;
                    let left = j / (10usize).pow(split);
                    let right = j - left * (10usize).pow(split); 
                    
                    // println!("split: {j} -> {left} {right}");
                    data[i] = left;
                    data.insert(i+1, right);
                    i += 1;
                    len += 1;
                } else {
                    data[i] *= 2024;
                }
            }
        }
        i += 1;
    }
    len = data.len();
    // println!("{:?}", data);
    }
    
    println!("{}", data.len());
}