LeetCode 75 - 643. Maximum Average Subarray I

LeetCode 75 - 1679. Max Number of K-Sum Pairs

LeetCode 75 - 11. Container With Most Water

C++ print enum class

In C++11, due to the inability of enum class to be printed through the std::cout standard stream, three solutions are provided to address this issue.

C++ POD type

POD is an acronym for **Plain Old Data** in C++, referring to a data type that can be copied and transferred via simple memory copy