fn main() {
    println!("{}", raindrops(3));
}

pub fn raindrops(n: usize) -> String {
    let sound = (1..=n)
        .filter(|x| n % x == 0)
        .map(|x| match x {
            7 => "Plong",
            5 => "Plang",
            3 => "Pling",
            _ => "",
        })
        .collect::<Vec<&str>>()
        .join("");
    //if sound.is_empty() {
    //    n.to_string()
    //} else {
    //    sound
    match sound.is_empty() {
        true => n.to_string(),
        false => sound,
    }
}