When should I use a queue instead of a deque?

When should I use a queue instead of a deque?

A queue is best for FIFO operations, while a deque allows for both ends to be accessed. What are you trying to achieve?

I need to manage tasks in a specific order. Would a queue work better?

Yes, if you need to process tasks in the order they arrive, a queue is ideal. A deque is more flexible for adding/removing from both ends.

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

Sure! A deque is useful in scenarios like a sliding window algorithm, where you need to add and remove elements from both ends efficiently.

What about performance differences between the two?

Queues generally have O(1) time complexity for enqueue and dequeue operations, while deques also offer O(1) for both ends, but may have slightly more overhead.