question on priority queue c++

https://open.kattis.com/problems/pharmacy https://open.kattis.com/problems/clinic (this is a short and simple question) 2 questions on priority queue (PLS DO PHARMACY FIRST BECAUSE IT IS HARDER) start with #include using namespace std; pls have clear documentation and explain ur code pls pls test the code and make sure it works and passes all test cases pls make the code simple and easy to comprehend thanks