import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        int x,h,m,s;
        Scanner sc = new Scanner(System.in);
        x=sc.nextInt();
        h=x/3600;
        m=(x-3600*h)/60;
        s=x-3600*h-60*m;
        System.out.printf("%d:%d:%d%n",h,m,s);
    }
}
/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