using System;

public class Program

{

    public static void Main()

    {

        int rows = 5;

            /*for(int i =1 ; i<=rows ; i++)

            {

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

                {

                    Console.Write(j); 

                }

                Console.WriteLine("");

            }*/

        /*for(int i = 1 ; i<=rows ; i++)

        {

            for(int j=i;j<=rows;j++)

            {

                Console.Write(j); 

            }

            Console.WriteLine("");

        }*/

        int number, i, k, count = 1;

        Console.Write("Enter number of rows\n");

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

        count = number - 1;

        for (k = 0; k <= number-1; k++)

        {

            for (i = k; i <= number-1; i++)

                Console.Write(" ");

            count--;

            for (i = 1; i <= 2 * k + 1; i++)

                Console.Write("*");

            Console.WriteLine();

            count++;

        }

        count = 1;

        for (k = 1; k <= number - 1; k++)

        {

             for (i = 1; i <= count; i++)

             {

                Console.Write("  ");

             }

            for (i = 1; i <= 2 * (number - k) - 1; i++)

            {

                Console.Write("*");

            }

            count++;

            Console.WriteLine();

        }

        Console.ReadLine();

        //Console.WriteLine("Hello World");

    }

}