using System;

public class Program

{

    public static void Main()

    {

        int N;

        Console.WriteLine("Nhap so N:");

        N=int.Parse(Console.ReadLine());

        int X;

        Console.WriteLine("Nhap so X:");

        X=int.Parse(Console.ReadLine());

        double S=1;

        double a=1;

        int i=1;

        while(i<=N)

        {a=Math.Pow(X,2*i);

        int k=1;

        long b=1;

        while(k<=(2*i))

        {Console.WriteLine("k cua {1} :{0}",k,i);

        b=b*k;

         Console.WriteLine("b cua {1} :{0}",b,i);

        k++;}

        S=S+a/b;

        i++;

        }

        Console.WriteLine(i);

        Console.WriteLine(a);

        Console.WriteLine(S);

    }

}