public class Dynamic{

  static int fib(int n){

    int a[] = new int[n+2];

    a[0] = 0;
    a[1] = 1;

    for(int i = 2; i<=n;i++){
      a[i] = a[i-1]+a[i-2];
    }
    return a[n];
  }

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