STOP

STOP.cs

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

namespace _05_Problem
{
    class STOP
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int rowLen = (n + 1) * 4 - 1;
            // topSideLen = 2 * n + 1, height = (n + 1) * 2 

            for (int i = n + 1; i >= 0; i--)
            {
                if (i == n + 1)
                    Console.WriteLine("{0}{1}{0}", 
                                    new string('.', i), 
                                    new string('_', rowLen - 2 * i));
                else if (i == 0)
                    Console.WriteLine("{0}//{1}STOP!{1}\\\\{0}", 
                                    new string('.', i), 
                                    new string('_', (rowLen - 9) / 2));
                else
                    Console.WriteLine("{0}//{1}\\\\{0}", 
                                    new string('.', i), 
                                    new string('_', rowLen - 2 * i - 4));
            }
            for (int i = 0; i < n; i++)
            {
                Console.WriteLine("{0}\\\\{1}//{0}", 
                                    new string('.', i), 
                                    new string('_', rowLen - 2 * i - 4));
            }
        }
    }
}