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41 lines
2.3 KiB
HTML
41 lines
2.3 KiB
HTML
<p>You are implementing a program to use as your calendar. We can add a new event if adding the event will not cause a <strong>triple booking</strong>.</p>
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<p>A <strong>triple booking</strong> happens when three events have some non-empty intersection (i.e., some moment is common to all the three events.).</p>
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<p>The event can be represented as a pair of integers <code>startTime</code> and <code>endTime</code> that represents a booking on the half-open interval <code>[startTime, endTime)</code>, the range of real numbers <code>x</code> such that <code>startTime <= x < endTime</code>.</p>
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<p>Implement the <code>MyCalendarTwo</code> class:</p>
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<ul>
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<li><code>MyCalendarTwo()</code> Initializes the calendar object.</li>
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<li><code>boolean book(int startTime, int endTime)</code> Returns <code>true</code> if the event can be added to the calendar successfully without causing a <strong>triple booking</strong>. Otherwise, return <code>false</code> and do not add the event to the calendar.</li>
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</ul>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input</strong>
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["MyCalendarTwo", "book", "book", "book", "book", "book", "book"]
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[[], [10, 20], [50, 60], [10, 40], [5, 15], [5, 10], [25, 55]]
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<strong>Output</strong>
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[null, true, true, true, false, true, true]
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<strong>Explanation</strong>
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MyCalendarTwo myCalendarTwo = new MyCalendarTwo();
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myCalendarTwo.book(10, 20); // return True, The event can be booked.
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myCalendarTwo.book(50, 60); // return True, The event can be booked.
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myCalendarTwo.book(10, 40); // return True, The event can be double booked.
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myCalendarTwo.book(5, 15); // return False, The event cannot be booked, because it would result in a triple booking.
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myCalendarTwo.book(5, 10); // return True, The event can be booked, as it does not use time 10 which is already double booked.
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myCalendarTwo.book(25, 55); // return True, The event can be booked, as the time in [25, 40) will be double booked with the third event, the time [40, 50) will be single booked, and the time [50, 55) will be double booked with the second event.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>0 <= start < end <= 10<sup>9</sup></code></li>
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<li>At most <code>1000</code> calls will be made to <code>book</code>.</li>
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</ul>
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