253. Meeting Rooms II — Minimum Conference Rooms

Medium · Heap

Given an array of meeting time intervals `[start, end]`, determine the minimum number of conference rooms required to hold all meetings simultaneously.

Examples

Example 1
Input: intervals = [[0,30],[5,10],[15,20]]
Output: 2
Explanation: Meeting 1 [0,30] overlaps with both others

Constraints

• 1 ≤ intervals.length ≤ 10⁴