03_HouseWithAWindow

using System;

class HouseWithAWindow
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int outCount = ((2 * n) - 2) / 2;
        int innerCount = 1;
        int rowsBeforeAndAfterWindows = n / 4;

        for (int i = 1; i <= (2 * n) + 2; i++)
        {
            if (i == 1)
            {
                string outerDots = new string('.', outCount);
                Console.WriteLine("{0}*{0}", outerDots);
                outCount--;
            }
            else if (i > 1 && i < n)
            {
                string outerDots = new string('.', outCount);
                string innerDots = new string('.', innerCount);
                Console.WriteLine("{0}*{1}*{0}", outerDots, innerDots);
                outCount--;
                innerCount += 2;
            }
            else if (i == n)
            {
                string dots = new string('.', 2 * n - 3);
                Console.WriteLine("*{0}*", dots);
            }
            else if (i == n + 1 || i == (2 * n) + 2)
            {
                string asterix = new string('*', 2 * n - 1);
                Console.WriteLine(asterix);
            }
            else if (i > n + 1 && i <= n + 1 + rowsBeforeAndAfterWindows)
            {
                string dots = new string('.', 2 * n - 3);
                Console.WriteLine("*{0}*", dots);
            }
            else if (i > n + 1 + rowsBeforeAndAfterWindows && i <= n + 1 + rowsBeforeAndAfterWindows + n / 2)
            {
                string windows = new string('*', n - 3);
                string wall = new string('.', n / 2);
                Console.WriteLine("*{0}{1}{0}*", wall, windows);
            }
            else if (i > n + 1 + rowsBeforeAndAfterWindows + n / 2 && i != (2 * n) + 2)
            {
                string dots = new string('.', 2 * n - 3);
                Console.WriteLine("*{0}*", dots);
            }
        }
    }
}