Parallelepiped

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

namespace Axe
{
    class Program
    {
        static void Main(string[] args)
        {
            var num = int.Parse(Console.ReadLine());
            var width = 3 * num + 1;
            var hight = 4 * num + 1;

            var waves = num - 2;
            Console.Write('+');
            Console.Write(new string('~', waves));
            Console.Write('+');
            Console.WriteLine(new string('.', width - waves - 2));

            var points = width - waves - 3;
            for (int row = 0; row < 2 * num + 1; row++)
            {
                Console.Write('|');
                Console.Write(new string('.', row));
                Console.Write('\\');
                Console.Write(new string('~', num - 2));
                Console.Write('\\');
                Console.WriteLine(new string('.', points));
                points--;
            }

        }
    }
}