Heapsort & Priority Queues Explained

No node objects, no left or right pointers—just a flat, contiguous array masquerading as a binary tree!

Watch how simple arithmetic (2i + 1 and 2i + 2) lets a Heap map parents to children with zero memory overhead, keeping the smallest (or largest) item sitting at the root ready to go. Perfect for Dijkstra’s algorithm, OS schedulers, and top-k streaming.

Reference source code: https://github.com/spothana/dsa_guide

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