import java.util.*;

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