Rhombus of Stars

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

namespace Rhombus_of_Star
{
    class Program
    {
        private static string GenerateFrom(string input, int times)
        {
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < times; i++)

            {
                builder.Append(input);
            }
            return builder.ToString();
        }
        static void Main(string[] args)
        {

            int n = int.Parse(Console.ReadLine());

            for (int row = 1; row <= n; row++)
            {
                Console.Write(GenerateFrom(" ", n - row));
                Console.WriteLine(GenerateFrom(" *", row));
            }

            for (int i = n - 1; i > 0; i--)
            {
                Console.Write(GenerateFrom(" ", n-i));
                Console.WriteLine(GenerateFrom(" *", i));
            }

        }
    }
}