練手題:
152. Maximum Product Subarray
156. Binary Tree Upside Down *
163. Missing Ranges
166. Fraction to Recurring Decimal
215. Kth Largest Element in an Array
220. Contains Duplicate III *
223. Rectangle Area
227. Basic Calculator II
229. Majority Element II *
241. Different Ways to Add Parentheses
247. Strobogrammatic Number II
不會題:
179. Largest Number: 利用quicksort來進行排序x+y
201. Bitwise AND of Numbers Range: 特別煩bit的題 *