A self-contained React app for mastering LeetCode problems with spaced repetition, topic-based lessons, and full Python solutions — no need to visit LeetCode.
- 848 problems with descriptions, examples, Python solutions, pseudocode, and step-by-step explanations
- 16 topic lessons with pattern guides, code templates, common mistakes, and tips
- Spaced repetition (SM-2 algorithm) to resurface problems you struggle with
- Difficulty progression — study queues prioritize: due reviews > unseen easy > medium > hard
- Syntax-highlighted Python code with Prism.js
- Pseudocode for memorization — terse natural-language steps for each problem
- Bookmarkable URLs — every topic, problem, and filter state has its own route
- Progress tracking saved to localStorage
Arrays & Hashing, Two Pointers, Sliding Window, Stack, Binary Search, Linked List, Trees, Tries, Heap / Priority Queue, Backtracking, Graphs, Dynamic Programming, Greedy, Intervals, Math & Geometry, Bit Manipulation
npm install
npm run dev| Path | Page |
|---|---|
/ |
Dashboard |
/study |
Study session |
/problems |
All problems (filterable) |
/search |
Search |
/topic/:slug |
Topic lesson + problems |
/problem/:id |
Individual problem page |
Filters sync to query params: /problems?status=solved&difficulty=Hard
React 18, TypeScript, Tailwind CSS, Vite, React Router, Prism.js
- Pick a topic or start a study session
- Read the problem description and try to solve it
- Check the solution, pseudocode, and explanation
- Rate your confidence (0-5) — the SM-2 algorithm schedules your next review
- Problems you struggle with come back sooner; ones you nail get spaced out further