C++11: std::set vs std::vector

What are the main differences between std::set and std::vector in C++11?

std::set is an ordered collection of unique elements, while std::vector is a dynamic array that allows duplicates.

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

Use std::set when you need to maintain unique elements and require automatic sorting. Use std::vector for fast access and when duplicates are allowed.

Can you give an example of when std::vector would be more efficient?

Sure! If you need to frequently access elements by index or need to add/remove elements at the end, std::vector is more efficient.

What about memory usage between the two?

std::vector generally uses less memory than std::set because std::set maintains additional data structures for ordering and uniqueness.