fn read_single_value<T>() -> T
where
    T: std::str::FromStr,
    T::Err: std::fmt::Debug,
{
    let mut buf = String::new();
    std::io::stdin().read_line(&mut buf).unwrap();
    buf.trim().parse().unwrap()
}

fn main() {
    let n = read_single_value::<usize>();
    println!("{0: <03}", n);
}