Reverse Linked List
EasyAcceptance: 70.2%
Given the head of a singly linked list, reverse the list, and return the reversed list.
Examples:
Input: head = [1,2,3,4,5]
Output: [5,4,3,2,1]
Explanation: The linked list is reversed.
Constraints:
- The number of nodes in the list is the range [0, 5000]
- -5000 <= Node.val <= 5000
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