easyLinked ListPattern: Linked List Reversal
Reverse Linked List Solution
Problem Statement
Given the head of a linked list, reverse the linked list and return the head of the reversed list.
Examples
Example 1:
Input:1 -> 2 -> 3
Output:3 -> 2 -> 1
Explanation: Reversing the linked list
Constraints
- The input linked list can be empty.
- Each node's value can be any non-negative integer.
- You can modify the original list.
Time: O(n) Space: O(1)
The optimized approach involves using three pointers to reverse the linked list in-place with a time complexity of O(n).
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