Reverse Linked List
Detailed guide and Python implementation for the 'Reverse Linked List' problem.
Problem Statement
Given the head of a singly linked list, reverse the list, and return the reversed list.
The linked list is represented as a list of values. Implement a function reverseList(head: list) -> list that takes a list representing the linked list and returns the reversed list.
- •The number of nodes in the list is in the range [0, 5000]
- •-5000 <= Node.val <= 5000
Examples
[1,2,3,4,5]
[5,4,3,2,1]
The original list is 1->2->3->4->5. After reversing, it becomes 5->4->3->2->1.
[1,2]
[2,1]
The original list is 1->2. After reversing, it becomes 2->1.
[]
[]
An empty list reversed is still an empty list.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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