> 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-ciscn.md).

# 2020 CISCN

- [easyphp](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-ciscn/easyphp.md)
- [easytrick](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-ciscn/easytrick.md)
- [rceme](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-ciscn/rceme.md)
- [babyunserialize](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-ciscn/babyunserialize.md)
- [littlegame](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-ciscn/littlegame.md)