Learn heaps through interactive exercises — from basics to advanced problems
Interactive visualization — insert and extract from a min-heap
What heaps are, how they're stored, bubble up/down, Python's heapq module, and max-heap trick.
Use heapq to find the 3rd largest element in a list.
Return the k smallest elements from a list using a heap.
Sort a list using only heap operations — no built-in sort!
Process tasks in priority order using a heap-based scheduler.
Time complexities, when to use heaps, common mistakes, and debug checklist.