mediumDSA
Reverse a Linked List
Given the `head` of a singly linked list, reverse the list, and return the reversed list.
### Example 1
**Input:** head = [1,2,3,4,5]
**Output:** [5,4,3,2,1]
### Constraints
- The number of nodes in the list is in the range `[0, 5000]`.
- `-5000 <= Node.val <= 5000`
Ensure function signatures match starter code to run test cases.
index.js
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Test Case #1
Input: null
Expected: null