import algds.IOUtils;

public class aufgabe15A1
{
    public static int fib (int n)
    {
        if (n==1|n==0) return 1;
        else return (fib(n-1)+fib(n-2));
    }
    public static void main (String args[])
    {
        System.out.print(" n : ");
        int n=IOUtils.readInt();
        System.out.println (n);
        System.out.println ("fib ( "+n+"  ) = "+fib(n));
    }
}