What are the differences between C++ containers?

What are the differences between std::vector and std::list in C++?

std::vector is a dynamic array that allows random access, while std::list is a doubly linked list that allows efficient insertions and deletions.

When should I use std::deque instead of std::vector?

Use std::deque when you need fast insertions and deletions at both ends, as it provides better performance for those operations.

Can you explain the advantages of using std::set?

std::set stores unique elements in a sorted order, allowing for fast lookups, insertions, and deletions, which is useful for maintaining a collection of unique items.

What about std::map? How is it different from std::unordered_map?

std::map is ordered and implemented as a balanced tree, while std::unordered_map is implemented as a hash table, providing average constant time complexity for lookups.