LeetCode-style algorithm problems generated by AI. Pick a topic and difficulty below, then solve right in your browser — free, no signup required.
126+ problems·12 topics·Daily new challenge
| # | Status | Topic | Est. Time | ||
|---|---|---|---|---|---|
| 1 | ○ | 🎯General | Hard | ~40 min | |
| 2 | ○ | 🌲Tree | Hard | ~40 min | |
| 3 | ○ | 🎯General | Hard | ~40 min | |
| 4 | ○ | 🔤Strings | Medium | ~25 min | |
| 5 | ○ | 🎯General | Medium | ~25 min | |
| 6 | ○ | 🎯General | Medium | ~25 min | |
| 7 | ○ | 🌲Tree | Easy | ~15 min | |
| 8 | ○ | 🎯General | Medium | ~25 min | |
| 9 | ○ | 🎯General | Medium | ~25 min | |
| 10 | ○ | 📦Array | Easy | ~15 min | |
| 11 | ○ | 📦Array | Easy | ~15 min | |
| 12 | ○ | 📦Array | Medium | ~25 min | |
| 13 | ○ | 🔗Linked List | Medium | ~25 min | |
| 14 | ○ | 📚Stack | Hard | ~40 min | |
| 15 | ○ | 📚Stack | Medium | ~25 min | |
| 16 | ○ | 📦Array | Medium | ~25 min | |
| 17 | ○ | 📚Stack | Easy | ~15 min | |
| 18 | ○ | 📦Array | Easy | ~15 min | |
| 19 | ○ | 🎯General | Hard | ~40 min | |
| 20 | ○ | 🎯General | Medium | ~25 min | |
| 21 | ○ | 🎯General | Medium | ~25 min | |
| 22 | ○ | 🔗Linked List | Medium | ~25 min | |
| 23 | ○ | 📦Array | Medium | ~25 min | |
| 24 | ○ | 🌲Tree | Medium | ~25 min | |
| 25 | ○ | 📦Array | Medium | ~25 min | |
| 26 | ████████████████████ | 📚Stack | Medium | ~25 min | |
5 private problems hidden — make yours public to help the community | |||||
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SkillAI Hub is a free, AI-powered alternative to LeetCode for practising data structures and algorithms. Every problem is generated by AI and comes with worked examples, an in-browser code editor, and instant feedback — so you can go from reading a problem to running your solution without leaving the page. Filter by topic such as arrays, strings, hash maps, trees, graphs, and dynamic programming, or by Easy, Medium, and Hard difficulty to match your level.
Sign in to track which problems you've solved or attempted, and try the Daily Challenge — a fresh problem hand-picked for everyone each day. Want something specific? Generate a brand-new problem on demand for any topic and difficulty.
Yes. You can browse and solve our library of AI-generated algorithm problems for free, with no signup required to start. Generating brand-new custom problems on demand is a Plus feature.
Problems are generated by AI, so the catalogue keeps growing and you can create a fresh problem tailored to a specific topic or difficulty whenever you want. Each problem comes with worked examples, an in-browser code editor, and instant feedback.
Arrays, strings, hash maps, stacks, queues, linked lists, trees, graphs, heaps, two pointers, binary search, dynamic programming, backtracking, sorting, and math — plus general mixed problems.
Easy problems focus on a single core idea (~15 minutes). Medium problems combine concepts and edge cases (~25 minutes). Hard problems require non-obvious insight or optimal complexity (~40 minutes).
Yes. When signed in, solved and attempted problems are marked in the list and you can filter by status to focus on what you have not finished yet.