How do I merge and splice sequences with std::priority_queue?

In C++, the `std::priority_queue` is a container adaptor that provides a way to store elements in a specific order based on their priority. Merging and splicing sequences can be achieved using custom methods to manage multiple priority queues efficiently. Below is an example demonstrating how to merge and splice sequences using `std::priority_queue`.

C++, std::priority_queue, merge sequences, splice sequences, priority queue example, C++ container adaptor
Learn how to combine multiple `std::priority_queue` instances and manipulate their contents in C++. This guide provides an example of merging and splicing sequences effectively.
#include <iostream> #include <queue> #include <vector> int main() { // Creating two priority queues std::priority_queue pq1; std::priority_queue pq2; // Adding elements to the first priority queue pq1.push(10); pq1.push(20); pq1.push(30); // Adding elements to the second priority queue pq2.push(5); pq2.push(15); pq2.push(25); // Merging two priority queues std::vector merged; while (!pq1.empty()) { merged.push_back(pq1.top()); pq1.pop(); } while (!pq2.empty()) { merged.push_back(pq2.top()); pq2.pop(); } // Rebuilding the priority queue from merged vector std::priority_queue merged_pq(merged.begin(), merged.end()); // Displaying merged priority queue std::cout << "Merged Priority Queue: "; while (!merged_pq.empty()) { std::cout << merged_pq.top() << " "; merged_pq.pop(); } std::cout << std::endl; return 0; }

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