using System;

using System.Numerics;

​

class Program

{

    static void Main()

    {

        Console.WriteLine(AreEqual(false, false, true));

        Console.WriteLine(AreEqual(true, true, true));

        Console.WriteLine(AreEqual(false, true, true));

        Console.WriteLine(AreEqual(true, false, true));

        Console.WriteLine();

​

        Console.WriteLine(AreEqual(false, false, false));

        Console.WriteLine(AreEqual(true, true, false));

        Console.WriteLine(AreEqual(false, true, false));

        Console.WriteLine(AreEqual(true, false, false));

        Console.WriteLine();

​

        Console.WriteLine(AreEqual(false, false));

        Console.WriteLine(AreEqual(true, true));

        Console.WriteLine(AreEqual(false, true));

        Console.WriteLine(AreEqual(true, false));

    }

​

    static bool AreEqual(bool a, bool b, bool? commonCompareFlag = null) =>

        !(Convert.ToBoolean(a.CompareTo(

            commonCompareFlag ??= Convert.ToBoolean(System.Random.Shared.Next()))) ^ 

          Convert.ToBoolean(b.CompareTo(

              commonCompareFlag.Value)));

}

​