using System;

public class Program

{

    public static void Main()

    {

        int i,r;

        Console.Write("\n\n");

        Console.Write("Diamond: \n");

        Console.Write("------------------------------------");

        Console.Write("\n\n");

        Console.Write("Input number of rows (half of the diamond): ");

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

        i = 0;

        while(i<=r)

        {

            for(int j=1;j<=r-i;j++)

            {

                Console.Write(" ");

            }

            for(int j=1;j<=2*i-1;j++)

            {

                Console.Write("*");

            }

            Console.Write("\n");

            i++;

        }

        i=r-1;

        while(i >= 1)

        {

            for(int j = 1;j <= r-i; j++)

            {

                Console.Write(" ");

            }

            for(int j = 1;j<=2*i-1;j++)

            {

                Console.Write("*");

            }

            Console.Write("\n");

            i--;

        }

    }

}