206. Reverse Linked List

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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] Example 2: Input: head = [1,2] Output: [2,1] Example 3: Input: head = [] Output: [] Constraints: - The number of nodes in the list is the range [0, 5000]. - -5000 <= Node.val <= 5000 Follow up: A linked list can be reversed either iterativ

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solution.cppC++17

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