Design

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# Title Acceptance Difficulty
460 LFU Cache 22.3% Hard
432 All O`one Data Structure 27.5% Hard
381 Insert Delete GetRandom O(1) - Duplicates allowed 28.5% Hard
380 Insert Delete GetRandom O(1) 38.9% Medium
379 Design Phone Directory 31.4% Medium
362 Design Hit Counter 53.3% Medium
359 Logger Rate Limiter 59.0% Easy
355 Design Twitter 25.0% Medium
353 Design Snake Game 26.1% Medium
348 Design Tic-Tac-Toe 45.7% Medium
346 Moving Average from Data Stream 58.2% Easy
341 Flatten Nested List Iterator 40.3% Medium
297 Serialize and Deserialize Binary Tree 32.6% Hard
295 Find Median from Data Stream 25.1% Hard
288 Unique Word Abbreviation 16.0% Medium
284 Peeking Iterator 35.3% Medium
281 Zigzag Iterator 49.6% Medium
251 Flatten 2D Vector 39.8% Medium
244 Shortest Word Distance II 36.2% Medium
232 Implement Queue using Stacks 35.9% Easy
225 Implement Stack using Queues 32.0% Easy
211 Add and Search Word - Data structure design 21.5% Medium
208 Implement Trie (Prefix Tree) 26.9% Medium
173 Binary Search Tree Iterator 40.3% Medium
170 Two Sum III - Data structure design 23.6% Easy
155 Min Stack 27.5% Easy
146 LRU Cache 16.9% Hard
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