import java.util.Scanner;

public class Main {

public static void main(String[] args){
Scanner input = new Scanner(System.in);
int tot = input.nextInt();
int hours = tot / 3600;
tot = tot - (hours*3600);
int mins = tot / 60;
tot = tot - (mins * 60);
System.out.println(hours+":"+mins+":"+tot);

}
}

/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