import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No00000651_Main {
	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	public static void main(String[] args) throws IOException {
		int a = Integer.parseInt(br.readLine());
		int m = (60 * a) / 100;
		System.out.println(String.format("%02d:%02d", 10 + (m / 60), m % 60));
	}
}