import java.util.*;

public class Main {
	public static void main(String[] args){
		
		Scanner inputTime = new Scanner(System.in);
		int input = inputTime.nextInt();
		int h = input / 3600;
		int amari = input % 3600;
		int m = amari / 60;
		int s = amari % 60;
		
		System.out.println(h + ":" + m + ":" + s);
		
	}
}
/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