Sunglasses

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Sunglasses
{
    class Sunglasses
    {
        static void Main(string[] args)
        {
          //1. Variant
            int n = int.Parse(Console.ReadLine());
            var stars = new string('*', 2 * n);
            var spaces = new string(' ', n);

            Console.Write(stars);
            Console.Write(spaces);
            Console.WriteLine(stars);

            for (int row = 1;  row <= n - 2; row++)
            {

                var dashes = new string('/', 2 * n - 2);
                Console.Write("*");
                Console.Write(dashes);
                Console.Write("*");
                if (row == ((n - 1) / 2))
                {
                    Console.Write(new string('|', n));
                }

                else
                {
                    Console.Write(spaces);
                }
                Console.Write("*");
                Console.Write(dashes);
                Console.WriteLine("*");
            }

            Console.Write(stars);
            Console.Write(spaces);
            Console.WriteLine(stars);

         // 2. VAriant

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

            for (int row = 1; row <= n; row++)
            {
                if (row == 1 || row == n)
                {
                    Console.Write(new string('*', 2 * n));
                    Console.Write(new string(' ', n));
                    Console.WriteLine(new string('*', 2 * n));
                }

                else
                {
                    Console.Write("*");
                    Console.Write(new string('/', (2 * n) - 2));
                    Console.Write("*");
                    if (n % 2 == 0)
                    {
                        if (row == n / 2)
                        {
                            Console.Write(new string('|', n));
                        }
                        else
                        {
                            Console.Write(new string(' ', n));
                        }
                    }
                    else
                    {
                        if (row == (n / 2) + 1)
                        {
                            Console.Write(new string('|', n));
                        }
                        else
                        {
                            Console.Write(new string(' ', n));
                        }
                    }

                    Console.Write("*");
                    Console.Write(new string('/', (2 * n) - 2));
                    Console.WriteLine("*");
                }

            // 3. Variant
            int n = int.Parse(Console.ReadLine());

            for (int row = 1; row <= n; row++)
            {
                if(row == 1 || row == n)
                {
                    Console.Write(new string('*', 2 * n));
                    Console.Write(new string(' ', n));
                    Console.WriteLine(new string('*', 2 * n));
                }
                else
                {
                    Console.Write('*');
                    Console.Write(new string('/', 2 * n - 2));
                    Console.Write('*');

                    if (row == (n + 1) / 2)
                    {
                        Console.Write(new string('|', n));
                    }
                    else
                    {
                        Console.Write(new string(' ', n));
                    }

                    Console.Write('*');
                    Console.Write(new string('/', 2 * n - 2));
                    Console.WriteLine('*');
                }
        }
    }
}