[第二期活动] 在职刷题打卡，目标工作日一天2题，周末一天5题

#Day_11

68. Text Justification
609. Find Duplicate File in System

Day 9
1. Continue Tree Basic, 100, 101, 104, 110, 111,1120, 235, 236, 572, 543, 297
  => how to divide and conquer (dfs), how to solve the problem iteratively (bfs)
2. BFS, Number of islands

day 10
Split Array Largest Sum
same tree

Day 6

N queen
Alien Dictionary
Sequence Reconstruction

#Day_2

91. Decode Ways
332. Reconstruct Itinerary

补充内容 (2019-8-14 10:06):
127. word ladder

Day 5
CTCI Object-Oriented Design
蠡口 146, 4, 5, 200, 15
水了两天，罪恶感满满。。。

#Day_12

Finished * 2
224. Basic Calculator
227. Basic Calculator II

#Day_02

428 Serialize and Deserialize N-ary Tree
380 Insert Delete GetRandom O(1)

Reviewd:
105  Construct Binary Tree from Preorder and Inorder Traversal
106 Construct Binary Tree from Inorder and Postorder Traversal
109 Convert Sorted List to Binary Search Tree

day 10
Encode and Decode Strings
Unique Word Abbreviation

Day_1 (8/13)

Power(x, n)  // int to long, 防止 Math.abs() 越界
Integer to Roman