import java.util.Scanner;



public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int s,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 60;
		s = s % 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