Meeting Rooms II
Conference Room Scheduler Design a system to allocate the minimum number of conference rooms needed to accommodate all meeting requests. Given meeting intervals where each interval is [start, end], determine how many rooms are required. Example: [[0,30],[5,10],[15,20]] → 2 rooms
This is a two-pointers problem where the key is knowing which move can only improve things. Interviewers love it because it reveals your invariant-driven scanning and your edge-case discipline. The trap is moving the wrong pointer and silently skipping the real answer.
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