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判断单链表是否有环
阅读量:472 次
发布时间:2019-03-06

本文共 189 字,大约阅读时间需要 1 分钟。

在链表环检测算法中,通常使用两个指针p和q进行操作。具体来说,p每次只向前移动一步,而q则每次向前移动两步。在实际操作中,如果链表存在环,那么这两个指针最终会相遇;反之,如果链表是线性的,q会比p提前遇到终止节点null。

这一算法的设计思想源自于利用两个不同移动速度的指针来追踪链表的环状特性。通过比较两个指针的移动速度,可以有效地判断链表是否存在环路。

转载自: 某技术博客

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