8月刷题/Mock interview接龙活动（缺米刷题的来）

今日打卡，链表三道题目

20200802:
new
3: 0223, 0750, 1055, 1522
4: 0376, 0556
5: 0324

review
3: 0543, 1245
4: 0031, 0211
5:

8.5打卡

LC 847 Shortest Path Visiting All Nodes   
LC 864 Shortest Path to Get All Keys   
LC 332 Reconstruct Itinerary

继续刷linkedlist，一天七道题感觉正好刷的不累

连续5天打卡。今日5题

binary search/bst
113.path-sum-ii.java
124.binary-tree-maximum-path-sum.java
236.lowest-common-ancestor-of-a-binary-tree.java
437.path-sum-iii.java
475.heaters.java
563.binary-tree-tilt.java
34.find-first-and-last-position-of-element-in-sorted-array.java

每日三题 08/05 Day5
#211 Add and Search Word - 用了链表的方式存储，错题点在于string end的判断，好像还可以更快？
#20 Valid Parentheses - 第一次错因为把题目看简单了，后来用3个指针做出来的，但是看了一眼答案应该是用stack最方便
#22 Generate Parentheses - 用DP的方法做的，两次WA一次是边界条件空串还是空list弄混了，另一次是DP方程写错了只考虑了n-1但是其实可以到n/2

八月5号

4道medium
Add and Search Word
Count Complete Tree Nodes -- 用 binary search 做，感觉思路少见挺巧妙的
Shortest Word Distance II
Shortest Word Distance III

大家加油，再接再厉

8.5 day5 August LeetCoding Challenge

今天的daily challenge是trie, 所以复习了一下
* Add and Search Word - Data structure design
* Replace Words
* Check If a Word Occurs As a Prefix of Any Word in a Sentence
* Word Search II