Disk

using System;

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

            for (int i = 1; i <= fieldSize; i++)
            {
                for (int j = 1; j <= fieldSize; j++)
                {
                    if (Math.Pow(i - fieldSize/2-1,2) + Math.Pow(j - fieldSize/2-1,2) <= Math.Pow(radius,2))
                    {
                        Console.Write("*");
                    }
                    else
                    {
                        Console.Write(".");
                    }
                }
                Console.WriteLine();
            }
        }
    }
}