Linked list~~~

1. preface

A data structure

2. Example

1. Add order linked list merge
https://leetcode-cn.com/problems/he-bing-liang-ge-pai-xu-de-lian-biao-lcof/
2. Space is limited to O(1) Realize the first common node of two linked lists
https://leetcode-cn.com/problems/liang-ge-lian-biao-de-di-yi-ge-gong-gong-jie-dian-lcof/
3. Copy list with random pointer （ It is very helpful to understand the linked list ）
https://leetcode-cn.com/problems/copy-list-with-random-pointer/
4. Addition of two numbers
https://leetcode-cn.com/problems/add-two-numbers/
5.*** List sorting ： Speed pointer + Merger
https://leetcode-cn.com/problems/7WHec2/
6. The speed pointer deletes the node
https://leetcode-cn.com/problems/SLwz0R/