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