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## 思路
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《代码随想录》算法公开课:[链表遍历学清楚! | LeetCode:19.删除链表倒数第N个节点](https://www.bilibili.com/video/BV1vW4y1U7Gf),相信结合视频在看本篇题解,更有助于大家对链表的理解。
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双指针的经典应用,如果要删除倒数第n个节点,让fast移动n步,然后让fast和slow同时移动,直到fast指向链表末尾。删掉slow所指向的节点就可以了。
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思路是这样的,但要注意一些细节。
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