circle console

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace novo2
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int r = int.Parse(Console.ReadLine());
            int center = n / 2;
            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    int x = center - i;
                    int y = center - j;
                    double distance = Math.Sqrt(Math.Pow(x, 2) + Math.Pow(y, 2));
                    if (distance <= r)
                    {
                        Console.Write("*");
                    }
                    else
                    {
                        Console.Write(".");
                    }

                }
                Console.WriteLine();
            }
            }
        }
    }