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

fn get_start(chars: &Vec<char>, len: usize) -> Option<usize> {
    for i in 0..chars.len() {
        let max = chars.len().min(i + len);
        let has_repeats = (i..max).any(|a| {
            return ((a + 1)..max).any(|b| chars[a] == chars[b]);
        });
        if !has_repeats {
            return Some(i + len);
        }
    }
    return None
}

fn run(label: &str, len: usize) {
    for line in lib::iter_input() {
        let chars = line.chars().collect();
        println!("{}: {}", label, get_start(&chars, len).unwrap());
    }
}

fn main() {
    run("part1", 4);
    run("part1", 14);
}