//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            int kenarUzunlugu;
            kenarUzunlugu = 20;
            int ortaNokta = kenarUzunlugu - 1;
            int taban = kenarUzunlugu * 2 - 1;
            for (int i = 0; i < kenarUzunlugu; i++)
            {
                for (int k = 0; k < taban; k++)
                {
                    if ((i + k == ortaNokta || k - i == ortaNokta))
                    {
                        Console.Write("*");
                    }
                    else if ((i + k >= ortaNokta && k - i <= ortaNokta))
                    {
                        Console.Write("*");
                    }
                    else if (i == ortaNokta)
                        Console.Write("*");
                    else
                        Console.Write(" ");
                }
                Console.WriteLine();
            }
        }
    }
}