leetcode hot100 反转链表

最新推荐文章于 2025-05-09 14:48:06 发布

chenziang1

最新推荐文章于 2025-05-09 14:48:06 发布

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文章标签： leetcode 链表算法

本文链接：https://blog.csdn.net/chenziang1/article/details/146407601

版权

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next
class Solution:
    def reverseList(self, head: Optional[ListNode]) -> Optional[ListNode]:
        prev = None
        cur= head
        while cur:
            tmp =cur.next
            cur.next = prev
            prev = cur
            cur = tmp
        return prev

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