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Quick Summary
Implement user management with constraints on simultaneous active tasks.
Validate task assignments by detecting interval overlaps and verifying dynamic quota limits.
Query active tasks for a user within specific time windows.
What This Tests
Sweep-line algorithms for interval analysis and peak load detection.
Hash table design for O(1) user and task lookups.
Interval clipping and overlap logic.
Event sorting and tie-breaking rules for half-open intervals.
State simulation over time ranges.
Common Patterns
Sweep-line
Hashing
Sorting
Interval Operations
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