题目列表

题目	难度
LRU Cache	困难
Min Stack	简单
Binary Search Tree Iterator	中等
Flatten Nested List Iterator	中等
Design Twitter	中等
Insert Delete GetRandom O(1)	中等
Insert Delete GetRandom O(1) - Duplicates allowed	困难
All O`one Data Structure	困难
LFU Cache	困难
Implement Trie (Prefix Tree)	中等
Add and Search Word - Data structure design	中等
Implement Stack using Queues	简单
Implement Queue using Stacks	简单
Serialize and Deserialize Binary Tree	困难
Peeking Iterator	中等
Design Linked List	简单
Design Circular Queue	简单
Design HashSet	简单
Design HashMap	简单
Find Median from Data Stream	困难
Design Circular Deque	中等