【战拖】每天刷题打卡

11.19
复习
40. Combination Sum II
142. Linked List Cycle II
141. Linked List Cycle
39. Combination Sum

打卡活动，靠谱！这个要加

31. Next Permutation
46. Permutations
47. Permutations II

2017/11/20
78. Subsets
90. Subsets II
79. Word Search
70. Climbing Stairs

刷到70了，昨天研究了下linked list deep copy.

61. Rotate List

2017/11/21
263. Ugly Number
264. Ugly Number II
55. Jump Game
121. Best Time to Buy and Sell Stock

34. Search for a Range

2017/11/22
100. Same Tree
101. Symmetric Tree

2017/11/24
104. Maximum Depth of Binary Tree
110. Balanced Binary Tree
105. Construct Binary Tree from Preorder and Inorder Traversal
106. Construct Binary Tree from Inorder and Postorder Traversal
108. Convert Sorted Array to Binary Search Tree
111. Minimum Depth of Binary Tree
112. Path Sum
113. Path Sum II