Serious ML engineering prep, unlocked.
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All problems unlocked
Access every problem across numpy fundamentals, transformer internals, LLM inference, distributed training, and PyTorch — 100+ problems and growing.
Unlimited code runs
Free users get 3 runs per day. Premium removes all limits — run as many times as you need without interruption.
Hidden test cases revealed
See the full suite of hidden edge-case tests before you submit. Understand exactly what your solution needs to handle.
Reference solutions
Every problem comes with a clean, well-commented reference implementation. Read it after solving — or when you're stuck — to learn the canonical approach.
Mathematical formulations
Full LaTeX derivations for every algorithm. Understand the math behind softmax, attention, Adam, and every other primitive you'll be asked about.
Progress tracking
See which problems you've solved, your pass rate, and streaks. Know exactly where you stand heading into interviews.
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