Pointer Trio
`prev`, `curr`, and `next` protect the chain while each link is reversed.
Loading...
Loading...
Loading Curriculum...
Loading Subject...
Loading Topic...
Loading Lesson...
Loading Lab...
Reverse Linked List rewires node links so traversal order changes without copying the entire list.
`prev`, `curr`, and `next` protect the chain while each link is reversed.
The current node points backward to `prev`, then all pointers advance.
When traversal ends, `prev` becomes the new head.
DLL and k-group reversal use the same pointer discipline with extra boundaries.