using System;

public class Program

{

    public static void Main()

    {

            Console.WriteLine();

            Console.WriteLine("This program will print isosceles triangle!");

            Console.WriteLine();

            Console.Write("Enter even number for the base a: ");

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

            int b = a + a + 1;

            ////int d = 1;   // Не се използва никъде

            int n = 0;

            int c = a + 1;

            char emptySpace = ' ';

            char symbol = '©';

            //if (a % 2 == 0)

            //{

                for (int y = 0; y <= (a - 2); y++, c++)

                {

                    for (n = a - 1; n >= 0; n--)

                    {

                        if ((y < (n + 1)) || (y > (n + 1)))

                        {

                            Console.Write(emptySpace);

                        }

                        else

                        {

                            Console.Write(symbol);

                        }

                    }

                    for (int e = a + 1; e <= b; e++)

                    {

                        if ((c < e) || (c > e))

                        {

                            Console.Write(emptySpace);

                        }

                        else

                        {

                            Console.Write(symbol);

                        }

                    }

                    Console.WriteLine();

                }

                for (int x = 1; x <= b; x++)         // base of the triangle

                {

                    if (x % 2 == 0)

                    {

                        Console.Write(symbol);

                    }

                    else

                    {

                        Console.Write(emptySpace);

                    }

                }

                Console.WriteLine();

            }

            //else

            //{

            //    Console.WriteLine();

            //    Console.WriteLine("Your number it is not correct! Try again!");

            //    Console.WriteLine();

            //}

​

​

    }

​