What is the performance of priority queues in C++?

What is the performance of priority queues in C++?

Priority queues in C++ typically have a time complexity of O(log n) for insertion and removal operations.

How do I implement a priority queue in C++?

You can implement a priority queue using the STL priority_queue class, which is based on a max-heap.

What are the differences between a priority queue and a regular queue?

The main difference is that in a priority queue, elements are served based on priority rather than just their order in the queue.

Can you give an example of using a priority queue in a C++ program?

Sure! Here's a simple example:

#include <queue>
#include <iostream>

int main() {
    std::priority_queue<int> pq;
    pq.push(10);
    pq.push(5);
    pq.push(20);

    while (!pq.empty()) {
        std::cout << pq.top() << ' '; // Outputs: 20 10 5
        pq.pop();
    }
    return 0;
}