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Submit

cpbooster provides the following command to automatically submit your code to any supported Online Judge. See Supported Online Judges.

cpb submit <filePath> [url]

or its alias which is just s.

cpb s <filePath> [url]

Demo#

test

Requirements#

note

cpbooster uses a specific chromium binary that gets installed automatically in OS-specific cache folders:

  • %USERPROFILE%\AppData\Local\ms-playwright on Windows
  • ~/Library/Caches/ms-playwright on MacOS
  • ~/.cache/ms-playwright on Linux

according to playwright docs

Login#

Before you can use the submit command you will need to login to the Online Judge where you will submit your code.

cpb login <OnlineJudgeName>

For example, to login to AtCoder I would execute the following command

cpb login atcoder

The name can be written in upper or lowercase or mixed, it doesn't matter.

note

The submit command will automatically open the login page if it detects that you are not logged in, then it will continue to submit your code. So, the submit command will execute at most 2 actions.

information

cpbooster will NOT send any account information to anyone else, all it does is, save your cookies and session information like any browser does locally (in $HOME/.cpbooster/cpbooster-session.json).

How To Specify The URL#

When you run cpb submit you can provide the url in 2 different ways:

1. As A Command Argument#

You can specify the url after the <filePath> in the submit command.

For example:

cpb s A.DistanceAndAxis.cpp "https://codeforces.com/contest/1401/problem/A"

2. As A Commented Line In The Source File#

Another way to specify the url is by writing the string problem-url: followed by the url as a commented line somewhere in your source file. In this way you will be able to submit your code without adding extra argument in the command, just like in the demo.

For example:

A.DistanceAndAxis.cpp#
// problem-url: https://codeforces.com/contest/1401/problem/A
int main() {
...
}
important

This line will be automatically added when you clone a contest with cpb clone. So, no need to do anything manually during a contest.

note

If you specify the url in both ways (argument and commented line), the one specified as argument will be used.

How To Configure Language Aliases#

The language alias is the ID of the language for each Online Judge. See How To Find Language IDs. For example, in Codeforces, the alias for cpp can be any of:

IDName
42GNU G++11 5.1.0
50GNU G++14 6.4.0
54GNU G++17 7.3.0

Let's say we want to submit our cpp file using G++17, then we should specify it in languages.cpp.aliases.codeforces like this:

{
"languages": {
"cpp": {
"aliases": {
"codeforces": "54"
}
}
}

How To Find Language IDs#

To find language IDs follow the next steps:

1. Navigate to the online judge page where the language dropdown is located#

Some online judges use group of radio buttons or some other type of selectors for languages, like Uva Online Judge.

For example, in Codeforces and AtCoder you could go to any problem's page like:

2. Open the inspection tool#

Usually to open the inspection tool, you can right click in the page, and then click on Inspect.

test

test

3. Locate the <select> tag#

Also, note that we could also be looking for radio buttons, for example: Uva Online Judge uses Radio Buttons instead of a dropdown menu.

tip

Press ctrl+f to open the search box, and type <select. This will help you to find the tag faster

test

4. Locate the value of the language you wish to use#

For this, we will need to unfold the contents of the <select> tag to see the options. This is done by clicking on the small arrow to the left.

test

The content of the value property of each option is what cpbooster uses as Alias. So, now you can just copy and paste the value into your configuration file.

For example, if you want to use C++ (Clang 10.0.0) for cpp files in AtCoder, you could write your configuration file as follows.

{
"languages": {
"cpp": {
"aliases": {
"atcoder": "4004"
}
}
}
}

Supported Online Judges#

note

If you wish to add support for another Online Judge you can create a Pull Request in cpbooster's github repository. See Add Online Judge Support for guidance on how to do it.

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