> For the complete documentation index, see [llms.txt](https://xgn.gitbook.io/hhsoj-essential-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xgn.gitbook.io/hhsoj-essential-doc/problem-setup/problem-structure-full.md).

# Problem structure:Full

the most possible structure

The **full** structure of a problem contains:

```
problems/someProblemset/problemId/
                                problem.json
                                checker
                                statement.md(pdf)
                                subtask1/
                                        test0.in
                                        test0.out
                                        test1.in
                                        test1.out
                                        ...
                                subtask2/
                                subtask3/
                                ...
```

The name of the folder of the problem is the problem id. It should be short and easy to type.The **problem.json** contains the basic information of the problem and the scoring of subtasks. The **checker** is the executable file of the checker. The **statement.md** is the statement file in Markdown,or in PDF format. The subtask names can be changed as you like. You shouldn't change the testcases' names.

{% hint style="info" %}
The name of the folder of the subtask is called the **id of the subtask** 
{% endhint %}