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Problem: Reverse Linked List

Explore how to reverse a singly linked list by implementing both iterative and recursive methods. Understand the pointer reassignments that allow in-place reversal, achieving efficient O(n) time and constant space complexity. This lesson helps you apply these techniques to improve your linked list problem-solving skills in Java.

Statement

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

Note: A linked list can be reversed either iteratively or recursively. Could you implement both?

Constraints:

  • The number of nodes in the list is in the range [0,5000][0, 5000].

  • 5000-5000 ...