Task4_DiamondTrolls

using System;
using System.Globalization;
using System.Threading;

class DiamondTrolls
{
    static void Main()
    {
        Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
        checked
        {
            byte numN = byte.Parse(Console.ReadLine());
            int countLines = ((numN - 3) / 2) * 3 + 6;
            int elemOnLine = numN * 2 + 1;
            int halfLines = elemOnLine / 2 + 1;
            int horizLine = countLines - numN;
            for (int row = 1; row <= countLines; row++)
            {
                for (int col = 1; col <= elemOnLine; col++)
                {
                    if (row == horizLine || col == halfLines)
                    {
                        Console.Write("*");
                    }
                    else if ((row == 1 && col >= (halfLines - numN / 2) && col <= (halfLines + numN / 2))
                        || col == (halfLines - numN / 2 - row + 1) || col == (numN + numN / 2 + row))
                    {
                        Console.Write("*");
                    }
                    else if (row >= horizLine && (col == row + 1 - horizLine || col == halfLines + countLines - row))
                    {
                        Console.Write("*");
                    }
                    else
                    {
                        Console.Write(".");
                    }
                }
                Console.WriteLine();
            }
        }
    }
}