Reverse Linked List (Iterative)
Medium Problems of Singly Linked List DSA practice problem on Onlearn.
Difficulty: easy.
Topics: How to reverse a singly linked list and return the new head pointer?, Linked List, Singly Linked List, Node, Pointer, Recursion, Stack, Time Complexity, Space Complexity, Big O Notation, In-place Algorithm, in-place algorithms, complexity analysis, stack, pointer operations, recursion, linked list.
Reverse a Singly Linked List Problem Statement Given the head of a singly linked list, write a program to reverse the linked list, and return the head pointer to the reversed list. Input Specification The input will be a singly linked list. The values in the nodes will be integers. Output Specification Return the head of the reversed linked list. Sample Test Cases Example 1: Input: Output: Explanation: After reversing the linked list, the new head will point to the tail of the old linked list. Example 2: Input: Output: Explanation: In this example, the linked list contains only one node, hence reversing this linked list will result in the same list as the original.