New
ML System Design & SQL tracks just landed
See what's new
×
Question Bank
Pricing
Blog
Forum
HOT
JobRadar
NEW
Referral
Description
Solution
Discussion
Submissions
Ask AI
Question Bank
OpenAI
Coding Question
AI Insights
Quick Summary
Manage credit grants that span time intervals and support point-in-time deductions.
Handle out-of-order event processing while maintaining accurate cumulative balances.
Return -1 if requested deductions exceed available credits at a specific timestamp.
What This Tests
Interval management and timeline aggregation
Hash map data structures for fast lookups
Difference arrays and prefix sum techniques
Decoupling stateful updates from instantaneous queries
Common Patterns
Prefix Sum
Hashing
Sorting
Collapse
Hint 1
Hint 2
What Interviewers May Ask Next
Ask AI Assistant
Ask AI Assistant
Ask me anything about this coding question!
Qwen
Qwen3.6-Flash
0/2000
Auto
Debug
Run
Submit
Test Cases
Input
Output
Expected
