static void RunEx1()
{
Console.WriteLine("#### EXERCISE 1 ####");
Ex1.Simple();
Ex1.Swap();
Ex1.Semaphores();
}
public static void Semaphores()
{
Console.WriteLine("3.");
Ex1.ResetIToFive();
Thread T1 = new Thread(new ThreadStart(Ex1.IncrementSemaphores));
Thread T2 = new Thread(new ThreadStart(Ex1.DecrementSemaphores));
T1.Start();
T2.Start();
T1.Join();
T2.Join();
Console.WriteLine($"i = {I}\n");
}