Grid, Interval, and Bitmask DP
Use Grid, Interval, and Bitmask DP as a 20-question checkpoint for coding interviews and algorithm revision. The attempt uses a 30-minute timer and hard difficulty so you can practise with clear conditions. 🧠 What you will practise: The questions cover dynamic programming and memoization; time and space complexity; and greedy decisions and proof of correctness. The question mix checks recall, application, and the reasoning needed to distinguish between plausible choices. Use the score to locate fragile knowledge and revise those areas before repeating the same question set; the answer explanations provide a focused review path.