CONCEPT BLOGS
Multi-phase guides with mental models, worked examples, diagrams, and real edge cases — the public form of Learnisim AI's conceptual learning. Read here; train it interactively in the app.
![Rooms for [[0,30],[5,10],[15,20]] overview diagram](/blogs/meeting-rooms-ii-min-rooms-explained-rooms-for-0-30-5-10-15-20/diagrams/hero.svg)
Learn Meeting Rooms II (Min Rooms) by tracing [[0,30],[5,10],[15,20]]. Master interval overlaps and min-heap allocation through a clear mental model.
![Insert [2, 5] into [[1,3],[6,9]] and [4, 8] into [[1,2],[3,5],[6,7],[8,10],[12,16]] overview diagram](/blogs/insert-interval-explained-adding-2-5-to-1-3-6-9/diagrams/hero.svg)
Master interval insertion by tracing how to insert [2, 5] into [[1, 3], [6, 9]] using a clean three-phase mental model for merges and overlaps.
![Merge [[1,3],[2,6],[8,10],[15,18]] and [[1,4],[4,5]] overview diagram](/blogs/merge-overlapping-intervals-explained-tracing-1-3-2-6/diagrams/hero.svg)
Master interval merging through mental models. Trace [[1,3],[2,6],[8,10],[15,18]] step-by-step and learn how sorting unlocks linear-time solutions.
