02-16 [LeetCode][1780. Check if Number is a Sum of Powers of Three] 3 Solutions: Tricky, Recursion and Base 3 Convertion
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