/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static int fibo(int n) {
        if (n == 1 || n == 2) {
            return 1;
        }
        return fibo(n - 1) + fibo(n - 2);
    }

    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        int n = 10;
        System.out.println(fibo(n));
    }
}