03-30 [LeetCode][74. Search a 2D Matrix] 6 Approaches: Brute Force, Row Search, Column Search, One Binary Search, 2D Coordinate Axis
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