using System;

public class Program

{

    public static void Main()

    {

        DateOnly? first = null;

        DateOnly? second = new DateOnly(2022, 9, 28);

        Console.WriteLine(first == null);

        Console.WriteLine(second == null);

        bool? firstBool = null;

        bool? secondBool = false;

        Console.WriteLine(firstBool == null);

        Console.WriteLine(secondBool == null);

    }

}