Intervals
Merge, insert, and schedule interval problems.
Foundation
Learn the invariant, apply it independently, then pass the Intervals checkpoint.
- Merge intervals (Medium)
Checkpoint
A graded check of the core Intervals reasoning skills.
Pattern Quest
Practice recognizing intervals problem shapes.
Intervals
Practice sorting by endpoints, detecting overlap, merging ranges, scheduling compatible work, and preserving boundary semantics for open and closed intervals.
- Count intervals range (Medium)
- Distance of nearest stores (Easy)
- Draw skyline (Hard)
- Insert interval (Medium)
- Is overlapped (Easy)
- Is square (Medium)
- Meeting Rooms II (Medium)
- Schedule meetings (Easy)
- Weighted job scheduler (Hard)