I don't understand this question. From some answers, I find maybe only 1->2->3->1 exists a cycle. 1->2->3->2 doesn't exist cycle????
Really thx yr help
@Harrywithcode The value of the ListNode really doesn't mean too much the real point here is the
@LHearen So you mean if there is a linked list cycle, there is a real cycle in structure. So only value equals doesn't mean a cycle, right?
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