How do I remove duplicates with std::priority_queue?

To remove duplicates using `std::priority_queue` in C++, you can leverage the properties of the priority queue along with a set to keep track of unique elements. Here's a simple example demonstrating how to do this:

#include #include #include int main() { std::priority_queue pq; std::set uniqueElements; // Sample input with duplicates int input[] = {10, 20, 10, 30, 20, 40}; // Insert elements into the priority queue while ensuring uniqueness for (int val : input) { if (uniqueElements.insert(val).second) { // Insert returns a pair, second is true if inserted pq.push(val); } } // Display the elements in priority order std::cout << "Unique elements in priority order: "; while (!pq.empty()) { std::cout << pq.top() << " "; pq.pop(); } return 0; }

std::priority_queue remove duplicates C++ C++ examples remove duplicates from array

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