Disk

using System;


namespace Disk
{
    class Disk
    {
        static void Main()
        {
            int size = int.Parse(Console.ReadLine());
            int radius = int.Parse(Console.ReadLine());

            for (int row = 0; row < size; row++)
            {
                for (int col = 0; col < size; col++)
                {
                    Console.Write("{0}", GetPoint(row, col, radius,size) ? '*' : '.');
                }
                Console.WriteLine();
            }
        }

        private static bool GetPoint(int row, int col, int radius,int size)
        {
            int pythagorean = (int)(Math.Pow(row - size/2, 2) + Math.Pow(col - size/2, 2));

            return pythagorean <= (int)Math.Pow(radius, 2) ? true : false;
        }
    }
}