Solution: Reverse Linked List
Explore how to reverse a singly linked list by manipulating pointers in place, avoiding extra memory. Understand the step-by-step process, including pointer initialization and traversal, to implement an efficient O(n) time and O(1) space solution that updates the head to the reversed list.
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.