import java.util.*;

public class TestFibs {
	public static void main(String[] args) {
		Scanner kbd = new Scanner(System.in);
		while(true) {
			System.out.print("enter an int -> ");
			int x = kbd.nextInt();
			if (x < 0) break;
			System.out.println("fib(" + x + ") = " + Fibonacci.fib(x));
		}
		System.out.println("bye");
	}


}