Fallen_In_Love

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

namespace _03.Fallen_In_Love
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int signForLeaves = 1;
            int leftDot;
            int midDot;
            Console.Write(new string('#', 2));
            Console.Write(new string('.', 2 * n));
            Console.Write(new string('#', 2));
            Console.Write(new string('.', 2 * n));
            Console.Write(new string('#', 2));
            Console.WriteLine();

            leftDot = 2 * n - 2;
            midDot = 2;

            //first Part
            for (int row = 1; row < n; row++)
            {
                Console.Write(new string('#', 1));
                Console.Write(new string('~', signForLeaves));
                Console.Write(new string('#', 1));
                Console.Write(new string('.', leftDot ));
                Console.Write(new string('#', 1));

                Console.Write(new string('.', midDot));
                Console.Write(new string('#', 1));
                Console.Write(new string('.', leftDot));
                Console.Write(new string('#', 1));
                Console.Write(new string('~', signForLeaves));
                Console.Write(new string('#', 1));
                signForLeaves++;
                leftDot-=2;
                midDot += 2;
                Console.WriteLine();
            }

            //Second Part
            leftDot = 1;
            midDot =2*n;
            signForLeaves = n;
            int endPoint = 1;
            for (int row = 1; row < 2*n-1; row++)
            {
                if (midDot>0 )
                {
                    Console.Write(new string('.', leftDot));
                    Console.Write(new string('#', 1));
                    Console.Write(new string('~', signForLeaves));
                    Console.Write(new string('#', 1));

                    Console.Write(new string('.', midDot));
                    Console.Write(new string('#', 1));
                    Console.Write(new string('~', signForLeaves));
                    Console.Write(new string('#', 1));
                    Console.Write(new string('.', endPoint));
                    leftDot += 2;
                    signForLeaves--;
                    midDot -= 2;
                    endPoint += 2;
                    Console.WriteLine();
                }
            }

            //middle
            Console.Write(new string('.', 2*n+1));
            Console.Write(new string('#', 4));
            Console.Write(new string('.', 2 * n + 1));
            Console.WriteLine();

            //last part
            for (int row = 1; row < n+1; row++)
            {
                Console.Write(new string('.', 2 * n + 2));
                Console.Write(new string('#', 2));
                Console.Write(new string('.', 2 * n + 2));
                Console.WriteLine();
            }
        }
    }
}