import java.util.Scanner;

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

		Scanner scanner = new Scanner(System.in);

		int sec = scanner.nextInt();

		// ??????
		int h = sec / 3600;

		// ???
		int m = (sec - (3600 * h)) / 60;

		// ?§?
		int s = sec - (3600 * h) - (60 * m);

		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