Figure.FirFree

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

class FirFree
{
    static void Main(string[] args)
    {
        int n = int.Parse(Console.ReadLine());
        int outDots = n-2;
        int star = 1;
        int endStar = 1;
        int innerDots = n - 2;


        for (int i = 0; i < n-1; i++)
        {
            Console.Write(new string ('.',outDots));
            Console.Write(new string ('*',star));
            Console.Write(new string('.',innerDots));
            outDots--;
            innerDots--;
            star = star + 2;
            Console.WriteLine();
        }
        Console.Write(new string ('.',n-2));
        Console.Write(new string('*',endStar));
        Console.Write(new string('.', n - 2));

        Console.WriteLine();

    }
}