> For the complete documentation index, see [llms.txt](https://netjimmy.gitbook.io/code-interview-note/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://netjimmy.gitbook.io/code-interview-note/linkedlist.md).

# 3. Linkedlist

* Merge two linked lists
* Find middle of linkedlist

1. [Sort list](https://www.lintcode.com/en/problem/sort-list/) (Merge Sort vs Quick Sort)
2. 避免使用A.next.next.pre這種用法，降低可讀性
3. 在做比較的時候先判定是否為null