Template for VS Code Dev Containers to try AtCoder in Rust 🦀
Warning
VS Code v1.85 and above may automatically install the GitHub Copilot extensions to your Dev Container.
Some contests prohibit the use of generative AI, so it is recommended to disable these extensions. Disabling the extensions is required each time you build the Dev Container.
In Dev Container environment you can use atcoder command(a and ac is alias). this is a thin-wrapper around the cargo-compete command that is specific to AtCoder.
It is used as follows.
Note
Subcommands that require authentication(e.g. login / submit) have not worked since about May 2025. This is probably due to this change.
To solve part of this problem, I created a small script called import-cookie in $PATH. Please run this script by passing the value of the REVEL_SESSION cookie from atcoder.jp as an argument. When doing so, don't forget to enclose the value in single quotes. You can obtain the value of REVEL_SESSION from your browser’s developer tools while logged in to atcoder.jp.
By doing this, subcommands that require authentication will start working. However, the submit subcommand only works during ongoing Rated contests.
# Login to AtCoder
atcoder login
# Participate in a contest
atcoder participate <Contest Identifier(e.g. abc086)>
# Create a package
atcoder new <Contest Identifier(e.g. abc086)>
# Open contest pages in your browser
cd <Contest Identifier(e.g. abc086)>
atcoder open
# Run the tests of A
atcoder test a
# Submit your code of A
atcoder submit aatcoder command stores the credentials used by cargo-compete under your workspace.
Specifically, XDG_DATA_HOME is set to the root of the workspace.