import java.util.*;

class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);

    int sec = scan.nextInt();
    int hour = sec / 3600;
    sec -= hour*3600;
    int min = sec / 60;
    sec -= 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