import java.util.Scanner;

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

/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