using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("Enter Length: ");

        string input = Console.ReadLine();

        int length = int.Parse(input);

        drawTriangle(length);

        Console.ReadLine();

    }

​

    private static void drawTriangle(int length)

    {

        for (int i = 0; i < (length + 1); i++)

        {

            if (i % 2 != 0)

            {

                int count = ((length) - i) / 2;

                string space = new String(' ', count);

                string star = new String('*', i);

                string str = space + star;

                Console.WriteLine(str);

            }

        }

    }

}