public class Fib
{
	public static void main (String[] args)
	{
		System.out.println (fib (5));
	}

	public static long fib (int n)
	{
		if (n == 0 || n == 1)
		{
			return n;
		}
		else
		{
			return fib(n - 1) + fib(n - 2);
		}
	}
}