Fading Coder

This review focuses on core techniques for arrays and linked lists, including practical C++ implementations. Arrays The most important concept for array problems is the two-pointer technique. Fast and Slow Pointers When removing or manipulating elements, nested loops lead to O(n²) time complexity. U...

Single-width adjacent caves in a row each hold some gold coins. A fixed-width stone door, initially blocking three unspecified caves, can be shifted exactly once to cover any set of three consecutive caves. No cave can be accessed before shifting; after shifting, only unblocked caves are collectible...