题解 | #链表中环的入口结点#
链表中环的入口结点
https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4
class Solution:
def EntryNodeOfLoop(self, pHead):
# write code here
visit={}
p=pHead
while p!=None:
key=hash(p)
if visit.get(key):
return p
visit[key]=1
p=p.next
return None
