As you already know, a stack is a data structure realizing the so-called LIFO (Last In - First Out) model. It's easy and you've already grown perfectly accustomed to it. Let's taste something new now.

Your task is to implement a class called Weeker. Yes, your eyes don't deceive you – this name comes from the fact that objects of that class will be able to store and to manipulate the days of the ...