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Solution: Reverse Linked List

Explore how to reverse a singly linked list by managing node pointers iteratively without extra space. Understand the steps to update node references and achieve O(n) time and O(1) space complexity for efficient in-place reversal.

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Statement

Given the head of a singly linked list, reverse the linked list and return its updated head.

Constraints:

Let n be the number of nodes in a linked list.

  • 11 \leq n 5×102\leq 5\times10^2
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