DiamondTrolls

using System;

    class DiamondTrolls
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            //first part
            Console.Write(new string('.',n / 2 + 1));
            Console.Write(new string('*', n));
            Console.WriteLine(new string('.', n / 2 + 1));

            //second part
            int outerDots = n / 2;
            int innerDots = n / 2;
            for (int i = 0; i < n/2; i++)
            {
                Console.Write(new string('.',outerDots));
                Console.Write("*");
                Console.Write(new string('.', innerDots));
                Console.Write("*");
                Console.Write(new string('.', innerDots));
                Console.Write("*");
                Console.WriteLine(new string('.', outerDots));

                innerDots++;
                outerDots--;
            }

            //third part
            Console.WriteLine(new string('*',n * 2 + 1));

            //forth part
            outerDots = 1;
            innerDots = n - 2;
            for (int i = 0; i < n - 1; i++)
            {
                Console.Write(new string('.', outerDots));
                Console.Write("*");
                Console.Write(new string('.', innerDots));
                Console.Write("*");
                Console.Write(new string('.', innerDots));
                Console.Write("*");
                Console.WriteLine(new string('.', outerDots));

                innerDots--;
                outerDots++;
            }

            //fifth part
            Console.Write(new string('.',n));
            Console.Write("*");
            Console.WriteLine(new string('.', n));
        }
    }