06-25 [LeetCode][191. Number of 1 Bits] 6 Approaches: Cycle, API, Divide and Conquer, Low Bit, Bit Set, Recursion
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
02-01 [LeetCode][136. Single Number] The XOR Cheat Sheet | Bit Manipulation with Easy Detailed Explanation