What Is LeetCode?

Full Definition

LeetCode is the de facto standard online judge for coding interview prep, hosting over 3,500 algorithmic problems with executable test cases, discussion forums, and editorial solutions. The platform's tagging system (company tags, topic tags, difficulty levels) has become the lingua franca of interview prep — when an interviewer says 'this is a LeetCode medium' or a candidate says 'I have a 200-problem LeetCode list', the meaning is universally understood. LeetCode Premium ($35/mo or $159/yr) unlocks company-tagged problem lists, which are particularly valuable for FAANG-targeting candidates: the 'Amazon top 100' or 'Google top 100' lists are based on real interview reports from Premium users. LeetCode Premium is not the only source of company-tagged data — LeakCode aggregates similar data from 7 sources (1Point3Acres, Blind, Glassdoor, Reddit, GeeksforGeeks, 1p3a OJ, direct submissions) at a single-purchase price point. Strong interview prep typically combines LeetCode for problem volume with one or more aggregator sources for recency-weighted company signal. Common prep strategies: NeetCode 150 (a curated 150-problem list), Blind 75 (the original curated list), or company-specific lists for the target company's last 6 months.