Solution: Reverse Linked List
Explore how to reverse a singly linked list by manipulating pointers in-place without extra memory. Understand the step-by-step process, including initializing pointers and updating links, to achieve an O(n) time and O(1) space solution. This lesson helps you implement and conceptualize an efficient linked list reversal, preparing you for common coding interview challenges.
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.