import java.util.Scanner;

class Main {
    int S,h,m,s;
    public void suzuki(){

        Scanner sc = new Scanner(System.in);

        S = sc.nextInt();
        h = S / 3600;
        m = (S - (h * 3600)) / 60;
        s = S - (h * 3600) - (m * 60);
        System.out.println(h + ":" + m + ":" + s);
    }

    public static void main(String[] args){

        new Main().suzuki();
    }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz