<ul><li>A priority queue in C++ is like a regular queue, where elements are retrieved based on priority rather than arrival order, with default behavior in priority_queue being a max heap.</li><li>To create a min heap in C++, the priority queue needs to be set up to reverse the priority, ensuring smaller values are treated as higher priority.</li><li>Custom comparators can be used to sort elements like pairs based on specific values, either by defining a struct or using lambda functions for cleaner implementation.</li><li>make_heap in C++ efficiently turns a list of elements into a heap with Floyd’s algorithm, offering linear time complexity O(n) for building the heap from the bottom up.</li></ul>

Everything I Wish I Knew About Priority Queues in C++

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