03-30 [LeetCode][74. Search a 2D Matrix] 6 Approaches: Brute Force, Row Search, Column Search, One Binary Search, 2D Coordinate Axis
03-28 [LeetCode][81. Search in Rotated Sorted Array II] The Key of Binary Search Is Narrow the Search Interval
02-18 [LeetCode][287. Find the Duplicate Number] 9 Approaches：Brute Force, Count, Hash, In-place Marked, Sorting, Index Sort, Binary Search, Bit Manipulation, Fast Slow Pointers
01-08 [Leetcode][69. Sqrt(x)] 4 Approaches for Finding the Square Root of A Number: Brute Force, Exponent, Binary Search and the Newton Iteration Method