import java.util.InputMismatchException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try {
			Scanner scan = new Scanner(System.in);
			int sec = scan.nextInt();
			int h = sec / 3600;
			int m = (sec / 60) % 60;
			int s = sec % 60;
			System.out.println(h + ":" + m + ":" + s);
			scan.close();
		} catch (InputMismatchException e) {
			System.out.println("Maybe Inputdata contains some characters");
		}
	}
}
/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