Leetcode Problem 731. My Calendar II

731. My Calendar II

Leetcode Solutions

Initialize a data structure to keep track of the changes in active events at each point in time.
For each booking request, increment the counter at the start time and decrement it at the end time.
Process the times in sorted order, keeping a running total of active events.
If the running total reaches 3 at any time, the booking would cause a triple booking, so return false.
If the booking is valid, update the data structure with the new event and return true.

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