import java.util.*;

public class TestTriangle {

	public static void main(String[] args) {
		Scanner kbd = new Scanner(System.in);
		Triangle calc = new Triangle();
		while(true) {
			System.out.print("-> ");
			int x = kbd.nextInt();
			int y = calc.tri(x);
			System.out.println("tri(" + x + ") = " + y);
			System.out.print("quit?(y/n) ");
			String response = kbd.next();
			if (response.equals("y")) break;
		}
		System.out.println("bye");
	}
}