Problem 3. Fir Tree

using System;

class FirTree
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int asterixes = 1;
        int dots = n-2;

        while (true)
        {
            DrawLine(asterixes, dots);
            asterixes = asterixes + 2;
            dots--;
            Console.WriteLine();
            if (dots == -1)
            {
                break;
            }
        }
        asterixes = 1;
        dots = n - 2;
        DrawLine(asterixes, dots);
        Console.WriteLine();

    }

    private static void DrawLine(int asterixes, int dots)
    {
        for (int i = 0; i < dots; i++)
        {
            Console.Write('.');
        }
        for (int i = 0; i < asterixes; i++)
        {
            Console.Write('*');
        }
        for (int i = 0; i < dots; i++)
        {
            Console.Write('.');
        }
    }
}