Could you demonstrate how you would implement an LRU cache policy in C++?

Very hard Difficulty

Very-hard questions are the ultimate test of your expertise and preparation. They demand not just knowledge, but creativity and strategic thinking, often addressing unique or highly technical aspects of your field.

Algorithms question

Algorithm questions test your understanding of computational procedures and efficiency. Be prepared to discuss time/space complexity, optimization techniques, and demonstrate your ability to convert abstract problems into working code.

Here's a Hint

Consider using a combination of a hash map and a doubly linked list to achieve O(1) operations for both lookups and updates.