Eggcelent

namespace Task04Eggcelent
{
    using System;

    class Program
    {
        static void Main()
        {
            string[] models = new string[] { "@.", ".@" };
            int eggSize = int.Parse(Console.ReadLine());
            string topAndBottom = string.Format("{0}{1}{0}",
                new string('.', eggSize + 1),
                new string('*', eggSize - 1));
            Console.WriteLine(topAndBottom);
            for (int i = eggSize - 1; i >= -(eggSize - 1); i -= 2)
            {
                if (i == -1)
                {
                    for (int pattern = 0; pattern < 2; pattern++)
                    {
                        Console.Write(".*");
                        for (int row = 0; row < (eggSize * 3 - 3) / 2; row++)
                        {
                            Console.Write("{0}", models[pattern]);
                        }

                        Console.WriteLine("{0}*.", models[pattern][0]);
                    }
                }

                Console.WriteLine("{0}*{1}*{0}",
                    new string('.', Math.Abs(i)),
                    new string('.',((eggSize * 3 + 1) - (Math.Abs(i) * 2 + 2))));
            }
            Console.WriteLine(topAndBottom);
        }
    }
}