Reverse Linked List
Given the head of a singly linked list, reverse the list in-place and return the head of the reversed list. You should implement the solution with O(1) auxiliary space and O(n) time complexity. Consider both iterative and recursive approaches, noting the trade-offs between them. Constraints: The number of nodes in the list is in the range [0, 5000]. Node values are between -5000 and 5000.
C++Iterative Pointer ReversalSingly Linked List
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