02-01 [LeetCode][136. Single Number] The XOR Cheat Sheet | Bit Manipulation with Easy Detailed Explanation
01-20 [LeetCode][171. Excel Sheet Column Number] 2 Approaches: Base Conversion from High to Low and from Low to High
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