问题分类

股票买卖问题

121. Best Time to Buy and Sell Stock

122. Best Time to Buy and Sell Stock II

回文问题

125. Valid Palindrome

131. Palindrome Partitioning

设计类

146. LRU Cache

链表问题

148. Sort List

206. Reverse Linked List

二叉树

236. Lowest Common Ancestor of a Binary Tree

bit类问题

190. Reverse Bits

191. Number of 1 Bits

括号匹配/合法问题

921. Minimum Add to Make Parentheses Valid

856. Score of Parentheses

解法分类

快慢指针

141. Linked List Cycle.md

双指针

238. Product of Array Except Self

283. Move Zeroes

328. Odd Even Linked List

数组元素当做下标

268. Missing Number

stack类

150. Evaluate Reverse Polish Notation

动态规划

198. House Robber

二维数组DFS/BFS

200. Number of Islands

329. Longest Increasing Path in a Matrix

奇技淫巧

190. Reverse Bits

191. Number of 1 Bits

326. Power of Three 计算题