import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		double time = a / 100.0 * 60.0 + 10 * 60.0;
		int minute = (int)(time % 60);
		int hour = (int)((time / 60) % 24);
		System.out.printf("%02d:%02d\n", hour, minute);

	}

}