очила

using System;

public class Program
{
    public static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        Console.Write(new string('*',n*2));
        Console.Write(new string(' ', n));
        Console.WriteLine(new string ('*', n*2));
        for (int i=0; i<n-2;i++)
        {
            Console.Write("*");
            Console.Write(new string ('/',n*2-2));
            Console.Write('*');
            if (i == (n - 3) / 2)
            {
                Console.Write(new string('|', n));
            }
              else
            {
                Console.Write(new string (' ', n));
            }

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