22 Data Structure (stack & queue --“dek”)

146 LRU (L134)

460 LFU (L24)

208 Implement Trie (Prefix Tree) (L442)

225 Implement Stack using Queues (L494)

232 Implement Queue using Stacks (L40)

L495 Implement Stack

L493 Implement Queue by Linked List II

L492 Implement Queue by Linked LIst

L229 Stack Sorting

L224 Implements Three Stacks by Singly Array

439 Ternary Expression Parser

20 Valid Parentheses

155 Min Stack

716 Max Stack

150 Evaluate Reverse Polish Notation (L424)

71 Simplify Path

379 Design Phone Directory

L643 Longest Absolute File Path (388) -- 实现上可以用prefix sum数组

609 Find Duplicate File in System

1249 Minimum Remove to Make Valid Parentheses

946 Validate Stack Sequences -- 这是一条stack的贪心

Deque：

L362 Sliding Window Maximum (239)

L528 Flatten Nested List Iterator

单调栈