Parallelepiped

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

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

            int width = (3 * n) + 1;
            int height = (4 * n) + 4;

            // Draw top
            string topRow = "+" + RepeatSymbol('~', n - 2) + "+" + RepeatSymbol('.', width - n);
            Console.WriteLine(topRow);
            for (int i = 0; i < (height / 2) - 1; i++)
            {
                string row = "|";
                row += RepeatSymbol('.', i);
                row += "\\";
                row += RepeatSymbol('~', n - 2);
                row += "\\";
                row += RepeatSymbol('.', width - (n + i + 1));

                Console.WriteLine(row);
            }


            // Draw bottom
            for (int i = 0; i < (height / 2) - 1; i++)
            {
                string row = RepeatSymbol('.', i);
                row += "\\";
                row += RepeatSymbol('.', width - (n + i + 1));
                row += "|";
                row += RepeatSymbol('~', n - 2);
                row += "|";

                Console.WriteLine(row);
            }

            string bottomRow = RepeatSymbol('.', width - n) + "+" + RepeatSymbol('~', n - 2) + "+";
            Console.WriteLine(bottomRow);
        }

        static string RepeatSymbol(char symbol, int count)
        {
            string result = "";
            for (int i = 0; i < count; i++)
            {
                result += symbol;
            }

            return result;
        }
    }
}