heapify down

Heapify down is a process used in heap data structures to maintain the heap property after deleting the root element. It involves comparing the deleted element with its children, swapping it with the smaller (in a min-heap) or larger (in a max-heap) child to restore the heap order. This process is repeated recursively until the element reaches its correct position in the heap. Heapify down ensures that the heap remains valid and can be efficiently used for operations like extracting the minimum or maximum element.

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