During this course, we looked at the Calendar class a bit. Your task is to extend its functionality with a new method called count_weekday_in_year, which takes a year and a weekday as parameters, and ...

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.