/******************************************************/
/* Introduction to Programming                        */
/* By Dr. ANTF                                        */
/* www.antf.net                                       */
/* Copyright 2015                                     */
/*                                                    */
/* C# 331 - Problem 30: Drawing Isosceles Triangle (a)*/
/******************************************************/

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

namespace DOS
{
    class Program
    {
        static void Main(string[] args)
        {
            int n;
            Console.Write("Please enter a number: ");
            n = int.Parse(Console.ReadLine());
            Console.WriteLine("\n");

            //convert the even n to odd
            if (n % 2 == 0) n++;

            //upper part
            for (int i = 0; i < n / 2; i++) Console.Write(" ");
            Console.Write("*");
            Console.Write("\n");

            //middle part
            for (int i = 0; i < n / 2 - 1; i++)
            {
                for (int j = 0; j < n / 2 - i - 1; j++) Console.Write(" ");
                Console.Write("*");
                for (int j = 0; j < 2 * i + 1; j++) Console.Write(" ");
                Console.Write("*");
                Console.Write("\n");
            }

            //lower part
            for (int i = 0; i < n; i++) Console.Write("*");

            Console.ReadKey();
        }
    }
}