Design

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# Title Acceptance Difficulty
642 Design Search Autocomplete System 28.2% Hard
635 Design Log Storage System 46.3% Medium
631 Design Excel Sum Formula 24.0% Hard
604 Design Compressed String Iterator 30.9% Easy
588 Design In-Memory File System 32.9% Hard
460 LFU Cache 23.4% Hard
432 All O`one Data Structure 27.8% Hard
381 Insert Delete GetRandom O(1) - Duplicates allowed 28.7% Hard
380 Insert Delete GetRandom O(1) 39.0% Medium
379 Design Phone Directory 32.3% Medium
362 Design Hit Counter 53.6% Medium
359 Logger Rate Limiter 59.6% Easy
355 Design Twitter 25.3% Medium
353 Design Snake Game 26.4% Medium
348 Design Tic-Tac-Toe 45.8% Medium
346 Moving Average from Data Stream 58.5% Easy
341 Flatten Nested List Iterator 41.2% Medium
297 Serialize and Deserialize Binary Tree 33.1% Hard
295 Find Median from Data Stream 26.3% Hard
288 Unique Word Abbreviation 16.5% Medium
284 Peeking Iterator 35.4% Medium
281 Zigzag Iterator 50.3% Medium
251 Flatten 2D Vector 40.3% Medium
244 Shortest Word Distance II 37.6% Medium
232 Implement Queue using Stacks 36.5% Easy
225 Implement Stack using Queues 32.7% Easy
211 Add and Search Word - Data structure design 22.5% Medium
208 Implement Trie (Prefix Tree) 27.9% Medium
173 Binary Search Tree Iterator 41.1% Medium
170 Two Sum III - Data structure design 24.3% Easy
155 Min Stack 28.4% Easy
146 LRU Cache 17.5% Hard
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