How do I choose the right container with std::deque?

// Example usage of std::deque in C++

#include <iostream>
#include <deque>

int main() {
    // Creating a deque
    std::deque<int> myDeque;

    // Adding elements to the front and back
    myDeque.push_back(10);
    myDeque.push_front(20);

    // Accessing elements
    std::cout << "Front element: " << myDeque.front() << std::endl; // Output: 20
    std::cout << "Back element: " << myDeque.back() << std::endl;   // Output: 10

    // Removing elements
    myDeque.pop_front(); // Removes 20
    myDeque.pop_back();  // Removes 10

    return 0;
}