29. My Calendar I

标签：end 29 start book booking Calendar My event MyCalendar

29. My Calendar I

标签（空格分隔）： leetcode array medium

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题目

Implement a MyCalendar class to store your events. A new event can be added if adding the event will not cause a double booking.

Your class will have the method, book(int start, int end). Formally, this represents a booking on the half open interval [start, end), the range of real numbers x such that start <= x < end.

A double booking happens when two events have some non-empty intersection (ie., there is some time that is common to both events.)

For each call to the method MyCalendar.book, return 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.

Your class will be called like this:
MyCalendar cal = new MyCalendar();
MyCalendar.book(start, end)

Example 1:

MyCalendar(); MyCalendar.book(10, 20); // returns true MyCalendar.book(15, 25); // returns false MyCalendar.book(20, 30); // returns true Explanation: The first event can be booked. The second can't because time 15 is already booked by another event. The third event can be booked, as the first event takes every time less than 20, but not including 20.

Note:

• The number of calls to MyCalendar.book per test case will be at most 1000.
• In calls to MyCalendar.book(start, end), start and end are integers in the range [0, 10^9].

• ---

  思路

  本题定义一个数值对数组A存储{start,end},要想发生double booking，必须满足当前的
  max(start,A.start)<min(end,A.end)

  代码

  class MyCalendar {
  public:
      vector<pair<int,int>> books;
      MyCalendar() {
          
      }
      
      bool book(int start, int end) {
          for(auto item:books)
          {
              if(max(item.first,start)<min(item.second,end))
                  return false;
          }
          books.push_back({start,end});   
          return true;
      }
  };
  
  /**
   * Your MyCalendar object will be instantiated and called as such:
   * MyCalendar obj = new MyCalendar();
   * bool param_1 = obj.book(start,end);
   */
  

标签：end,29,start,book,booking,Calendar,My,event,MyCalendar
From： https://blog.51cto.com/u_15996214/6105921