DrawFort

using System;

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

            var formula = num - 3;
            var formula2 = num * 2 - 2;

            var formula3 = num / 2;
            var FORMULAMid = 2 * num - 2 * formula3 - 4;

            Console.WriteLine(
                $"/{new string('^',formula3)}\\"
                +$"{new string('_', FORMULAMid)}"
                + $"/{new string('^', formula3)}\\");

            var testCol ="";

            for (int row = 1; row <= formula; row++)
            {
                testCol = "|" + new string(' ', formula2) + "|";
                Console.WriteLine(testCol);
            }

            Console.WriteLine(
                 $"|{new string(' ', formula3+1)}"
                   + $"{new string('_', FORMULAMid)}"
                   + $"{new string(' ', formula3+1)}|");

            Console.WriteLine(
                $"\\{new string('_', formula3)}/"
                + $"{new string(' ', FORMULAMid)}"
                + $"\\{new string('_', formula3)}/");

        }
    }
}