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Leetcode 206: Reverse linked list - python
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| def reverseList(self, head: Optional[ListNode]) -> Optional[ListNode]: | |
| if head == None or head.next == None: | |
| return head | |
| curNode = head | |
| prevNode = None | |
| while curNode: | |
| nextNode = curNode.next | |
| curNode.next = prevNode | |
| prevNode = curNode | |
| curNode = nextNode | |
| return prevNode |
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