题解 | #判断链表中是否有环#
判断链表中是否有环
https://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
# class ListNode:
# from numpy.random import f
# def __init__(self, x):
# self.val = x
# self.next = None
#
#
# @param head ListNode类
# @return bool布尔型
#
class Solution:
def hasCycle(self , head: ListNode) -> bool:
if not head:
return False
slow=head
fast=head
while fast.next and fast.next.next:
slow=slow.next
fast=fast.next.next
if slow==fast:
return True
return False
那就小心你的腰子咯