Arrow

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

namespace Arrow
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string dotUpper = new string('.', (n - 1) / 2);
            string dotInside = new string('.', n - 2);
            string diezUp = new string('#', n);
            string diez = "#";
            string dot = ".";
            Console.WriteLine(dotUpper + diezUp + dotUpper);
            for(int i = 0; i < n - 2; i++)
            {
                Console.WriteLine("{0}{1}{2}{1}{0}", dotUpper, diez, dotInside, diez, dotUpper);
            }
            string diezMiddle = new string('#', (n - 1) / 2 + 1);
            Console.WriteLine(diezMiddle + dotInside + diezMiddle);
            for (int i = 0; i < n - 1; i++)
            {
                for(int k = 0; k < (n * 2) - 1; k++)
                {
                    if(i >= 0 && k == (n + 1) - n + i)
                    {
                        Console.Write(diez);
                    }
                    else if(i >= 0 && k == (n * 2) - 3 - i)
                    {
                        Console.Write(diez);
                    }
                    else
                    {
                        Console.Write(dot);
                    }
                }
                Console.WriteLine();
            }
        }
    }
}