Solution: Reverse Linked List
Understand how to reverse a singly linked list by manipulating pointers in place. Learn the step-by-step process of using three pointers to reverse node links efficiently, achieving O(n) time with O(1) space complexity.
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.