using System;

​

public class Program

{

    public static void Main()

    {

        int x,y,n,k;

        n = Convert.ToInt32(Console.ReadLine());

        k = n / 2;      

        for(int i = 0; i < n; i++)

        {

            for(int j = 0; j < n; j++)

            {

                x = i;

                y = j;

                if(i > k) x = n - 1 - x;

                if(j > k) y = n - 1 - y;

                if(x + y == k || x != 0 || y != 0) 

                   Console.Write("*");

                else

                    Console.Write(" ");

                Console.Write("\n");

            }

            Console.Write("\n");

        }

    }

}

​