import java.util.Scanner;


public class Main {

	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);
		int second = sc.nextInt();
		sc.close();

		int h = 0,m = 0,s = 0;

		if(second != 0){
			h = (int)(Math.floor(second / 3600));
			m = (int)(Math.floor(second / 60)) % 60;
			s = second % 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