03. Sand-glass (7 Dec 2011 Morning)

using System;



class SandGlass
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int m = n/2;

        for (int i = 0; i <= m ; i++)
        {
            Console.Write(new string('.', i));
            Console.Write(new string('*', n));
            Console.WriteLine(new string('.', i));
            n -= 2;
        }

        n += 2;

        for (int j = m - 1; j >= 0 ; j--)
        {
            n += 2;
            Console.Write(new string('.', j));
            Console.Write(new string('*', n));
            Console.WriteLine(new string('.', j));

        }
    }
}