Solution: Reverse Linked List
Explore how to reverse a singly linked list by manipulating pointers directly without extra memory. Understand initializing and updating pointers during traversal. Learn to implement an efficient, in-place reversal algorithm with optimal time and space usage.
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.