use std::io::{stdin, Read};

fn main() {
    let mut buf = String::new();
    stdin().read_to_string(&mut buf).unwrap();
    let mut buf = buf.split_whitespace();
    let mut get = || buf.next().unwrap().parse::<i32>().unwrap();
    
    let mut a = get() * 60;
    let mut m = 0;
    let mut h = 10;
    loop {
        if a <= 0 {
            println!("{}:{}", h, m);
            break;
        }
        a -= 100;
        m += 1;
        if m >= 60 {
            m = 0;
            h += 1;
        }
    }
}