03.DrawFigure

using System;

class DrawFigure
{
    static void Main(string[] args)
    {

        string line = Console.ReadLine();
        int n = int.Parse(line);

        for (int i = 0; i <= n / 2; i++)
        {
            string dots = new string('.', i);
            string stars = new string('*', n - 2 * i);
            Console.WriteLine("{0}{1}{2}", dots, stars, dots);
        }

        for (int i = n / 2 - 1; i >= 0; i--)
        {
            string dots = new string('.', i);
            string stars = new string('*', n - 2 * i);
            Console.WriteLine("{0}{1}{2}", dots, stars, dots);
        }
    }
}