69. Sqrt(x)(二分查找)
35. Search Insert Position(二分查找)
34. Search for a Range
33. Search in Rotated Sorted Array(二分查找)
81. Search in Rotated Sorted Array II
74. Search a 2D Matrix(二分查找，剑指offer 1)
二分查找
原文：https://www.cnblogs.com/zle1992/p/8996502.html
