pub fn solve(puzzle: &str) -> u64 {
    let mut solution: u64 = 0;

    let mut dial: i32 = 50;
    puzzle.split("\n").enumerate().for_each(|(_, line)| {
        let direction: i32 = match &line[0..1] {
            "L" => -1,
            "R" => 1,
            _ => 0,
        };
        dial += direction * line[1..line.len()].parse::<i32>().unwrap();
        dial %= 100;
        if dial == 0 {
            solution += 1;
        }
    });

    solution
}