Design

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# Title Acceptance Difficulty
642 Design Search Autocomplete System 29.8% Hard
635 Design Log Storage System 48.5% Medium
631 Design Excel Sum Formula 26.0% Hard
604 Design Compressed String Iterator 32.1% Easy
588 Design In-Memory File System 34.1% Hard
460 LFU Cache 24.0% Hard
432 All O`one Data Structure 28.1% Hard
381 Insert Delete GetRandom O(1) - Duplicates allowed 28.9% Hard
380 Insert Delete GetRandom O(1) 39.2% Medium
379 Design Phone Directory 33.2% Medium
362 Design Hit Counter 54.2% Medium
359 Logger Rate Limiter 59.8% Easy
355 Design Twitter 25.5% Medium
353 Design Snake Game 26.6% Medium
348 Design Tic-Tac-Toe 46.1% Medium
346 Moving Average from Data Stream 58.9% Easy
341 Flatten Nested List Iterator 41.9% Medium
297 Serialize and Deserialize Binary Tree 33.6% Hard
295 Find Median from Data Stream 27.1% Hard
288 Unique Word Abbreviation 16.9% Medium
284 Peeking Iterator 35.5% Medium
281 Zigzag Iterator 50.8% Medium
251 Flatten 2D Vector 40.6% Medium
244 Shortest Word Distance II 38.5% Medium
232 Implement Queue using Stacks 36.9% Easy
225 Implement Stack using Queues 33.1% Easy
211 Add and Search Word - Data structure design 23.3% Medium
208 Implement Trie (Prefix Tree) 28.7% Medium
173 Binary Search Tree Iterator 41.7% Medium
170 Two Sum III - Data structure design 24.8% Easy
155 Min Stack 29.0% Easy
146 LRU Cache 18.1% Hard