石油转行SDE,刷题记录贴

今日打卡
Hard leetcode 336. Palindrome Pairs
Medium leetcode 211. Add and Search Word - Data structure design
Easy leetcode 720. Longest Word in Dictionary (又做了一遍）

昨日刷题：
Medium leetcode 208. Implement Trie (Prefix Tree)
Easy leetcode 744. Find Smallest Letter Greater Than Target
Medium leetcode 658. Find K Closest Elements (使用时间复杂度O(log(n-k))的方法而非传统O(log(n) + k)的方法）

LintCode medium 532. Reverse Pairs
easy 173. Insertion Sort List

今天全是easy
Easy leetcode 509. Fibonacci Number
Medium leetcode 873. Length of Longest Fibonacci Subsequence
Easy leetcode 231. Power of Two (use bit operation)
Easy leetcode 326. Power of Three (use largest mode == 0)
Easy leetcode 342. Power of Four

同石油转码 现在在USC 37

同为石油行业转sde，加油！

今天全部为复习
Easy laicode 4 Selection Sort
Medium laicode 9 Merge Sort
Medium laicode 10 Quick Sort
Medium laicode 11 Rainbow Sort
Medium laicode 399 Rainbow Sort II
Medium laicode 400 Rainbow Sort III
Medium laicode 279 Sort With 3 Stacks
Medium laicode 280 Sort With 2 Stacks
Easy laicode 258 Move 0s To The End I
Easy laicode 259 Move 0s To The End II
Easy laicode 232. Implement Queue using Stacks
Easy laicode 225. Implement Stack using Queues
Easy laicode 155. Min Stack
复习速度太慢啦要加快速度啊啊啊啊啊

今天继续复习
leetcode Easy 206. Reverse Linked List
leetcode Medium 92. Reverse Linked List II
leetcode Easy 141. Linked List Cycle
leetcode Medium 142. Linked List Cycle II
leetcode Easy 21. Merge Two Sorted Lists
leetcode Medium 86. Partition List
leetcode Medium 148. Sort List
leetcode Medium 2. Add Two Numbers
leetcode Medium 445. Add Two Numbers II
leetcode Easy 234. Palindrome Linked List
leetcode Easy 110. Balanced Binary Tree
leetcode Easy 101. Symmetric Tree
leetcode Easy 226. Invert Binary Tree (Google: 90% of our engineers use the software you wrote (Homebrew), but you can’t invert a binary tree on a whiteboard so f*** off.)
leetcode Medium 98. Validate Binary Search Tree
leetcode Medium 94. Binary Tree Inorder Traversal

昨天打卡
Medium 102. Binary Tree Level Order Traversal
Easy 107. Binary Tree Level Order Traversal II
Medium 103. Binary Tree Zigzag Level Order Traversal
Medium 785. Is Graph Bipartite?
以后会花更多时间在BQ上

Medium leetcode 47. Permutations II
Medium leetcode 46. Permutations
昨日继续复习
Medium leetcode 90. Subsets II
Medium leetcode 78. Subset
Medium leetcode 378. Kth Smallest Element in a Sorted Matrix
Medium leetcode 787. Cheapest Flights Within K Stops
Medium leetcode 64. Minimum Path Sum
Medium leetcode 958. Check Completeness of a Binary Tree