> 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/2020/2020-gkctf.md).

# 2020 GKCTF

- [Check\_In](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gkctf/check_in.md)
- [cve版签到](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gkctf/cve-ban-qian-dao.md)
- [老八小超市儿](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gkctf/lao-ba-xiao-chao-shi-er.md)