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
03-24 [LeetCode][881. Boats to Save People] Greedy: Let the Heaviest Match the Lightest, if Not Matched, Let it Alone