How do I iterate safely and efficiently with std::priority_queue?

Iterating through a `std::priority_queue` in C++ can be challenging, as this container does not provide direct iterators. However, there are methods to safely and efficiently access its elements while maintaining the priority order. One common approach is to use a loop to pop elements from the queue, which provides the highest priority element each time. Below is an example demonstrating this method.

#include #include int main() { // Create a priority queue std::priority_queue pq; // Adding elements to the queue pq.push(10); pq.push(30); pq.push(20); // Iterating through the priority queue safely while (!pq.empty()) { std::cout << pq.top() << std::endl; // Access highest priority element pq.pop(); // Remove the highest priority element } return 0; }

std::priority_queue C++ iteration safe iteration efficient iteration

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