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Meeting Rooms II

Detailed guide and Python implementation for the 'Meeting Rooms II' problem.

Problem Statement

Easy

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

Write a function minMeetingRooms(intervals: List[List[int]]) -> int.

Constraints
  • 0 <= len(intervals) <= 10^4
  • intervals[i].length == 2
  • 0 <= starti < endi <= 10^6

Examples

Example 1
Input
intervals = [[0,30],[5,10],[15,20]]
Output
2
Explanation

Room 1: [0,30], Room 2: [5,10], [15,20].

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

Meetings do not overlap.

Need a Hint?
Consider using Intervals-specific data structures like sets or heaps.
Edge Cases to Watch
  • Empty input structures
  • Single element inputs
  • Large numerical bounds

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