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LeetCode 2402 · Solution & editorial
You are given an integer n. There are n rooms numbered from 0 to n - 1.
Meeting Rooms III is a Heap (Priority Queue) Patterns problem, in the Scheduling / Minimum Cost (Greedy with Priority Queue) subpattern. The pattern covers top K elements, K-way merge, two heaps for median, and scheduling
Solve scheduling and optimization problems using priority queue with greedy approach.
The reference solution runs in O(mlogm + n + mlogn) time and O(n) space.
The full editorial is part of Pro
It explains the core insight, the complexity analysis and the common mistakes, with a worked solution.
Meeting Rooms III is a Heap (Priority Queue) Patterns problem, in the Scheduling / Minimum Cost (Greedy with Priority Queue) subpattern. Once the approach above makes sense, write it yourself and then work through the neighbouring problems that reuse it.