Implement a Skip List

### Link to the coursework

https://github.com/CodeYourFuture/Module-Complexity/tree/main/Sprint-2/implement_skip_list

### Why are we doing this?

Getting practical experience implementing efficient algorithms and data structures.

### Maximum time in hours

4

Note that this is a stretch exercise - you are not required to complete it.

### How to submit

Fork the repo to your own GitHub account
Make regular small commits with clear messages
When you are ready, open a Pull Request to the CYF repo
Make sure you fill in the PR template provided

打开链接的课程作业，首先检查 Sprint-2/implement_skip_list/ 目录。在四小时期限内实现其中描述的 skip list，然后按照 repository 的提交说明，使用提供的模板创建 pull request。

由索引模型根据 Issue 内容生成。