Problem 3 - Fir Tree

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

namespace FirTree
{
    class FirTree
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int width = n * 2 - 3;
            Console.Write(new string('.', width / 2));
            Console.Write('*');
            Console.Write(new string('.', width / 2));
            Console.WriteLine();
            for (int i = 1; i < n / 2; i++)
            {
                Console.Write(new string('.', width / 2 - i));
                Console.Write(new string('*', i + i + 1));
                Console.Write(new string('.', width / 2 - i));
                Console.WriteLine();
            }
            for (int i = n / 2; i < n-1; i++)
            {
                Console.Write(new string('.', width / 2 - i));
                Console.Write(new string('*', i + i + 1));
                Console.Write(new string('.', width / 2 - i));
                Console.WriteLine();
            }
            Console.Write(new string('.', width / 2 ));
            Console.Write('*');
            Console.Write(new string('.', width / 2 ));
            Console.WriteLine();
        }
    }
}