Ето и моето решение: https://pastebin.com/3mz79tVq

using System;

namespace softUniLogo
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			int n = int.Parse(Console.ReadLine());
			int width = 4 * n - 2;
			int height = 12 * n - 5;
			int leftPart = height / 2;
			int rightPart = height / 2;
			int middleSize = 1;
			for (int i = 0; i < n * 2; i++)
			{
				Console.WriteLine("{0}{1}{2}", new string('.', leftPart), new string('#', middleSize), new string('.', rightPart));
				middleSize += 6;
				leftPart -= 3;
				rightPart -= 3;

			}
			middleSize -= 12;
			leftPart += 5;
			rightPart += 6;
			for (int i = 0; i < n - 2; i++)
			{
				Console.WriteLine("|{0}{1}{2}", new string('.', leftPart), new string('#', middleSize), new string('.', rightPart));
				middleSize -= 6;
				leftPart += 3;
				rightPart += 3;
			}

 
				 
				Console.WriteLine("|{0}{1}{2}", new string('.', leftPart), new string('#', middleSize), new string('.', rightPart));
			 
			 
			 
			 
			 
			for (int i = 0; i < n - 2; i++)
			{

				Console.WriteLine("|{0}{1}{2}", new string('.', leftPart), new string('#', middleSize), new string('.', rightPart));

			}
			Console.WriteLine("@{0}{1}{2}", new string('.', leftPart), new string('#', middleSize), new string('.', rightPart));

		 
	 
			 
	 
		 

			 
 
			 
		}
	}
}

Ето моето решение на Java: https://pastebin.com/vvN806aj

Softuni Logo - https://pastebin.com/sjMCE8LW

Ето и моето решение:

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int dot = 6 * n - 3;
            int diez = 1;
            for (int i=1; i<=2*n; i++)
            {
                Console.WriteLine("{0}{1}{0}",new string('.',dot),new string('#',diez));
                diez+=6;
                dot -= 3;
            }
            int dot1 = 2;
            int dot2 = 3;
            int diez1 = 12 * n - 11;
            for (int j=1; j<n-1; j++)
            {
                Console.WriteLine("|{0}{1}{2}",new string('.',dot1),new string('#',diez1),new string('.',dot2));
                dot1 += 3;
                dot2 += 3;
                diez1 -= 6;
            }
           for (int k=1; k<=n-1; k++)
            {
                Console.WriteLine("|{0}{1}{2}", new string('.', dot1), new string('#', diez1), new string('.', dot2));
            }
            Console.WriteLine("@{0}{1}{2}", new string('.', dot1), new string('#', diez1), new string('.', dot2));
        }
    }
}

Ето едно решение и от мен:

https://github.com/koksiBG/Programming-Basics-Exam---18-March-2017/blob/master/SoftUni_Logo/SoftUni_Logo.cs