using System;

public class Program

{

    public static void Main()

    {

        int? a = null;

        int? b = null;

        bool e = a == b;

        bool l = a < b;

        bool g = a > b;

        int c = Nullable.Compare<int>(a, b);

        int c2 = a.GetValueOrDefault().CompareTo(b.GetValueOrDefault());

        Console.WriteLine("Equal: " + e);

        Console.WriteLine("Less:  " + l);

        Console.WriteLine("Great: " + g);

        Console.WriteLine("Comp:  " + c);

        Console.WriteLine("Comp2: " + c2);

    }

}