
import java.util.Scanner;

public class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);

		int i = scan.nextInt();

		int h = i / 3600;
		i = i - h * 3600;



		int m = i / 60;

		int s = i - m * 60;

		System.out.println(h + ":" + m + ":" + s);

		scan.close();


	}

}
/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