StopSign

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

namespace StopSign
{
    class StopSign
    {
        static void Main(string[] args)
        {
            int size = int.Parse(Console.ReadLine());

            //printing the top row
            int sideDots = size + 1;
            int middleDashes = (size * 2 + 1) - 4;
            for (int currRow = 0; currRow < size + 1; currRow++)
            {
                char leftBorder = currRow == 0 ? '_' : '/';
                char rightBorder = currRow == 0 ? '_' : '\\';

                Console.Write(new string('.', sideDots - currRow));
                Console.Write(new string(leftBorder, 2));
                Console.Write(new string('_', middleDashes));
                Console.Write(new string(rightBorder, 2));
                Console.WriteLine(new string('.', sideDots - currRow));

                middleDashes += 2;
            }

            //printing the mid part
            int dashesAroundStopText = (middleDashes - 5) / 2;
            Console.WriteLine("//" +
                              new string('_', dashesAroundStopText) +
                              "STOP!" +
                              new string('_', dashesAroundStopText) +
                              @"\\");

            //printing the bot part
            for (int currRow = 0; currRow < size; currRow++)
            {
                Console.Write(new string('.', currRow));
                Console.Write(@"\\");
                Console.Write(new string('_', middleDashes));
                Console.Write("//");
                Console.WriteLine(new string('.', currRow));

                middleDashes -= 2;
            }
        }
    }
}