import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);
		int second = scanner.nextInt();
		int h;
		int m;
		int s;
		
		h = second / 3600;
		second = second - h * 3600;
		m = second / 60;
		second = second - m * 60;
		s = second;
		
		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