LeetCode打卡贴

Day 9：
复习一下图
785. Is Graph Bipartite
685. Redundant Connection II
684. Redundant Connection

Day 10：
刷简单题上分
58. Length of Last Word
88. Merge Sorted Array
101. Symmetric Tree
112. Path Sum
118. Pascal's Triangle
119. Pascal's Triangle II
121. Best Time to Buy and Sell Stock
122. Best Time to Buy and Sell Stock II
169. Majority Element
225. Implement Stack using Queues
232. Implement Queue using Stacks
404. Sum of Left Leaves

Day 11：
昨天做的一题忘记打卡了。
743. Network Delay Time

Day 12：
310. Minimum Height Trees

Day 13:
108. Convert Sorted Array to Binary Search Tree

Day 14 & Day 15：
把明天份的刷了
208. Implement Trie (Prefix Tree)
212. Word Search II
427. Construct Quad Tree
561. Array Partition I
621. Task Scheduler
645. Set Mismatch

Day 16：
152. Maximum Product Subarray
230. Kth Smallest Element in a BST
328. Odd Even Linked List

Day 17：
先停几天，Day 22继续。
787. Cheapest Flights Within K Stops

Day23：
200. Number of Islands
392. Is Subsequence
395. Longest Substring with At Least K Repeating Characters

Day 24：
138. Copy List with Random Pointer
215. Kth Largest Element in an Array
224. Basic Calculator