>ExpInterview_

Meeting Rooms Ii

Medium
HeapArrayIntervals

Meeting Rooms II

Given an array of meeting time intervals intervals where intervals[i] = [starti, endi], return the minimum number of conference rooms required.

Example 1:

Input: intervals = [[0,30],[5,10],[15,20]]
Output: 2

Example 2:

Input: intervals = [[7,10],[2,4]]
Output: 1

Examples

Input: intervals = [[0,30],[5,10],[15,20]]
Output: 2
Input: intervals = [[7,10],[2,4]]
Output: 1
Input: intervals = [[1,5]]
Output: 1

Constraints

  • •1 <= intervals.length <= 10^4
  • •0 <= start_i < end_i <= 10^6