import java.util.*;
public class Main {
static Scanner sc= new Scanner(System.in);
   public static void main(String[] args) {
       int x =sc.nextInt();
      // System.out.println((x/60));
      // System.out.println((x/3600));
      System.out.println((x/3600)+":"+((x/60)-(x/3600)*60)+":"+(x-(((x/60)-(x/3600)*60)*60)-(x/3600)*3600));
   }
}
/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