import java.util.Scanner;

class Main{
 public static void main(String[] args){
  int S;
  Scanner scn = new Scanner(System.in);
  S = scn.nextInt();
  int hour;
  int minute;
  int second;
  hour = S/3600;
  minute = (S-3600*hour)/60;
  second = S-3600*hour-minute*60;

  System.out.println(hour+":"+minute+":"+second);
}
}
/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