288. My Calendar I

You are implementing a program to use as your calendar. We can add a new event if adding the event will not cause a double booking. A double booking happens when two events have some non-empty intersection (i.e., some moment is common to both events). Implement the MyCalendar class: - MyCalendar() Initializes the calendar object. - boolean book(int start, int end) Returns true if the event can be added without a double booking. Otherwise, return false and do not add the event.