When should I use deques in C++?

When should I use deques in C++?

Deques, or double-ended queues, are useful when you need efficient insertions and deletions at both ends. They are ideal for scenarios like implementing a sliding window algorithm.

Can you give me an example of when to use a deque?

Sure! A common example is in a task scheduling system where you need to add and remove tasks from both the front and back of the queue.

What are the advantages of using a deque over a vector?

Deques provide constant time complexity for insertions and deletions at both ends, while vectors may require shifting elements, leading to linear time complexity.

Are there any downsides to using deques?

Yes, deques may have slightly higher memory overhead compared to vectors due to their internal structure, and they can be less cache-friendly.