#!/usr/bin/python3
# -*- coding: utf-8 -*-
# @Time: 2019/3/26
# @Author: xfLi
# The file...
class ListNode:
def __init__(self, x):
self.val = x
self.next = None
def hasCycle(head):
cur = head
res = set()
while cur:
if cur in res:
return True
else:
res.add(cur)
cur = cur.next
return False
【LeetCode】141.环形链表
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转载自blog.csdn.net/qq_30159015/article/details/88831379
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