Package g0701_0800.s0729_my_calendar_i

Class MyCalendar

  • public class MyCalendar
extends Object
    729 - My Calendar I.

    Medium

    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 start and end that represents a booking on the half-open interval [start, end), the range of real numbers x such that start <= x < end.

    Implement the MyCalendar class:

    • MyCalendar() Initializes the calendar object.
    • boolean book(int start, int end) Returns true if the event can be added to the calendar successfully without causing a double booking. Otherwise, return false and do not add the event to the calendar.

    Example 1:

    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.

    Constraints:

    • 0 <= start < end <= 109
    • At most 1000 calls will be made to book.

    • Constructor Detail

      • MyCalendar

        public MyCalendar()

    • Method Detail

      • book

        public boolean book​(int start,
                    int end)