> For the complete documentation index, see [llms.txt](https://gitbook-88.gitbook.io/ctf-writeup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-88.gitbook.io/ctf-writeup/2019/2019-auroractf/check-in.md).

# Check In

源码base64拿flag

<figure><img src="https://oatmeal.vip/wp-content/uploads/2019/11/Check_in_2-1.png" alt=""><figcaption></figcaption></figure>