Telerik Exam. Kaspichania Boats

namespace _4.KaspichaniaBoats
{
    using System;

    public class KaspichaniaBoats
    {
        public static void Main(string[] args)
        {
            checked
            {
                int num = int.Parse(Console.ReadLine());

                int width = (2 * num) + 1;
                int height = 6 + (((num - 3) / 2) * 3);
                for (int row = 0; row < height; row++)
                {
                    for (int col = 0; col < width; col++)
                    {
                        if (row == num || col == num || (row == height - 1 && col >= num - (num / 2) && col <= num + (num / 2)))
                        {
                            Console.Write("*");
                        }
                        else if (col == row - num || col == (width - 1) - (row - num) || col == num - row || col == num + row)
                        {
                            Console.Write("*");
                        }
                        else
                        {
                            Console.Write(".");
                        }
                    }

                    Console.WriteLine();
                }
            }
        }
    }
}