How do I use a deque in C++?

How do I use a deque in C++?

A deque, or double-ended queue, allows insertion and deletion from both ends. You can include it by adding #include <deque>.

Can you show me some basic operations on a deque?

Sure! You can use push_front() to add an element at the front, and push_back() to add at the back. For example:

std::deque<int> d;
d.push_front(1);
d.push_back(2);

How do I access elements in a deque?

You can access elements using the at() method or the subscript operator []. For example:

int first = d.at(0);
int second = d[1];

What about removing elements?

You can remove elements using pop_front() to remove from the front and pop_back() to remove from the back.