Data Sources & Integrity Standards
Our core operating principle is full legal compliance and data provenance integrity. We strictly do not scrape LeetCode, republish proprietary problem statements, or expose copyright-protected materials.
No Direct Scraping
The website operates purely on static normalized exports from documented public repositories. No live scraper hits LeetCode servers during request cycles.
Permitted Licenses
Every ingested dataset is licensed under MIT or permissive open-source licenses. Source attribution and commits are tracked explicitly.
Deep Links Only
We maintain canonical problem slugs that redirect users to solve problems and run code executions directly on the official LeetCode platform.
Permitted Open-Source Datasets
LeetCode Company-Wise Problems (liquidslr)
Open-source company-tagged problem repository covering 420+ companies with 30-day, 3-month, 6-month, and all-time breakdown, updated as of October 2025.
Known limitation: User-reported company interview questions categorized across 30-day, 3-month, 6-month, and all-time periods.
NeetCode Public Practice Set
NeetCode curated algorithmic problem classifications and pattern groupings licensed under MIT.
Known limitation: Focuses on high-yield interview questions categorized by core algorithmic patterns.