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.).
The event can be represented as a pair of integers
end that represents a booking on the half-open interval
[start, end), the range of real numbers
x such that
start <= x < end.
MyCalendar()Initializes the calendar object.
boolean book(int start, int end)Returns
trueif the event can be added to the calendar successfully without causing a double booking. Otherwise, return
falseand do not add the event to the calendar.
Input ["MyCalendar", "book", "book", "book"] [, [10, 20], [15, 25], [20, 30]] Output [null, true, false, true] Explanation MyCalendar myCalendar = new MyCalendar(); myCalendar.book(10, 20); // return True myCalendar.book(15, 25); // return False, It can not be booked because time 15 is already booked by another event. myCalendar.book(20, 30); // return True, The event can be booked, as the first event takes every time less than 20, but not including 20.
0 <= start < end <= 109
1000calls will be made to