using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter the size of matini class : ");

​

            int martiniClassSize = 0;

​

            var isUserGivenSizeValid= int.TryParse(Console.ReadLine(), out martiniClassSize);

​

            if (!isUserGivenSizeValid || martiniClassSize <= 0)

​

            {

​

                Console.Clear();

​

                Console.WriteLine("Enter the valid size of matini class : ");

​

            }

​

            else

​

            {

​

                for (int i = martiniClassSize - 1; i >= 0; i--)

​

                {

​

                    Console.WriteLine(new string((char)48, 2 * i + 1).PadLeft((i + martiniClassSize)));

​

​

​

                }

​

                Console.WriteLine(new string((char)124, martiniClassSize).Replace(((char)124).ToString(), "|\n".PadLeft(martiniClassSize + 1)));

​

                Console.WriteLine(new string((char)61, martiniClassSize * 2 - 1));

​

            }

​

            Console.ReadLine();

    }

}