public class P20 {
    public static void main(String[] args) {
        int n = 10;
        System.out.print("Fibonacci Series of length " + n + ": ");
        fibonacci(0, 1, n);
    }

    public static void fibonacci(int a, int b, int n) {
        if (n == 0)
            return;
        System.out.print(a + " ");
        fibonacci(b, a + b, n - 1);
    }
}