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