Cat Watch

using System;

namespace CatWatch
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            for (int i = 1; i <= n - 2; i++)
            {
                Console.WriteLine($"{new string(' ', n)}||{new string('_', n - 2)}||{new string(' ', n)}");
            }

            Console.WriteLine($"{new string(' ', n - 1)}//{new string(' ', n)}\\\\{new string(' ', n - 1)}");

            for (int i = 1; i <= n - 4; i++)
            {
                Console.WriteLine($"{new string(' ', n - 2)}||{new string(' ', n + 2)}||{((i == (n - 3) / 2) ? "]" : "")}");
            }

            Console.WriteLine($"{new string(' ', n - 1)}\\\\{new string(' ', n)}//{new string(' ', n - 1)}");

            for (int i = 1; i <= n - 2; i++)
            {
                Console.WriteLine($"{new string(' ', n)}||{new string('_', n - 2)}||{new string(' ', n)}");
            }
        }
    }
}