using System;

​

public class Program

{

    public static void Main()

    {

        bool a = true;

        if (a)

        {

            Console.WriteLine("a is true");

        }

        if (!a == false)

        {

            Console.WriteLine("!a is false");

        }

        if (!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!a)

        {

            Console.WriteLine("I don't known");

        }

    }

}