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LinkedList 5-141. 环形链表

2022-07-29 15:58:00 【人工智能曾小健】

class Solution:
    def hasCycle(self, head: ListNode) -> bool:
        seen = set()
        while head:
            if head in seen:
                return True
            seen.add(head)
            head = head.next
        return False

class Solution:
    def hasCycle(self,head:ListNode) ->bool:
        seen=set()
        while head:
            if head in seen:
                return True
            seen.add(head)
            head = head.next
        return False

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https://zengxiaojian.blog.csdn.net/article/details/125418636