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206. Reverse Linked List

Easy


Given the head of a singly linked list, reverse the list, and return the reversed list.

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Example 1:

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Input: head = [1,2,3,4,5]
+Output: [5,4,3,2,1]
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Example 2:

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Input: head = [1,2]
+Output: [2,1]
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Example 3:

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Input: head = []
+Output: []
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Constraints:

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Follow up: A linked list can be reversed either iteratively or recursively. Could you implement both?

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