278. First Bad Version 二分模板
35. Search Insert Position lower_bound
69. Sqrt(x) upper_bound
**74. Search a 2D Matrix ** 把2D数组当成1D sorted array处理
**240. Search a 2D Matrix II **
33. Search in Rotated Sorted Array unique，用nums[mid]和nums[hi]判断mid落在哪半边
81. Search in Rotated Sorted Array II 非unique用hi--处理
153. Find Minimum in Rotated Sorted Array unique
154. Find Minimum in Rotated Sorted Array II 非unique用hi--处理
287. Find the Duplicate Number 根据解的range二分
378. Kth Smallest Element in a Sorted Matrix 根据解的range二分
875. Koko Eating Bananas
Sort
**56. Merge Intervals ** 没啥意思？
23. Merge k Sorted Lists 归并排序变型，O(nlog(k))
75. Sort Colors 3-way quicksort
