using System;
public class Program
{
public static long Factoriel (int n)
if (n == 0 || n == 1)
return 1;
}
else
return n * Factoriel(n - 1);
public static long Fib(int n)
if (n<=2)
return Fib(n-1) + Fib(n-2);
public static void Main()
Console.WriteLine(Fib(8));
int n = int.Parse(Console.ReadLine());
Console.WriteLine(Fib(4));