Leetcode Problem 732. My Calendar III

732. My Calendar III

Leetcode Solutions

Sweep-line Algorithm with Differential Array

  1. Initialize a HashMap diff to store the differential array.
  2. For each book call with [start, end):
    • Increment diff[start] by 1 to represent the start of a new event.
    • Decrement diff[end] by 1 to represent the end of the event.
    • Initialize a variable cur to 0 to track the current number of overlapping events.
    • Iterate over the keys in diff in sorted order, updating cur with the value of diff[key] to compute the prefix sum.
    • Keep track of the maximum value of cur during the iteration, which represents the maximum k-booking.
  3. Return the maximum k-booking after processing the current book call.
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Balanced Tree Approach

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