atcoder

Solutions for AtCoder problems.

Links

• michimani - AtCoder
• michimani - AtCoder Problems

Using Dev Containers

The repo ships a self-contained C++23 environment (Clang 21.1.0) under .devcontainer, with no reliance on host paths or symlinks.

1. Install the VS Code Dev Containers extension.
2. Run “Dev Containers: Reopen in Container” to build the image; it includes Clang 21.1.0, lldb, clang-format/tidy, CMake, Ninja, Boost, Eigen, online-judge-tools (oj), GitHub CLI (gh), and GNU time.
3. /usr/bin/clang-21 and /usr/bin/clang++-21 are used as the default compilers (C++23).
4. Host git config/ignore are mounted read-only into the container, and alias g='git' is applied on start.

Add extra packages by editing .devcontainer/Dockerfile as needed.

Running tests and submit (in Dev Container)

VS Code tasks are preconfigured under .vscode/tasks.json:

• test_atcoder_sample: downloads samples with oj dl and runs them via onlinejudge/cpp-test.sh (Clang 21.1.0, C++23; local-friendly flag set).
• submit_to_atcoder: submits via onlinejudge/cpp-submit.sh after oj login.

Run these tasks from the command palette or the Run/Test UI while inside the dev container.

Create new solutions

example: create solutions for A,B,C of ABC 123

new.sh abc 123 a,b,c

If you want to open the created files with your favorite editor, you can set the EDITOR_COMMAND environment variable. For example, using VSCode.

EDITOR_COMMAND=code new.sh abc 123 a,b,c

License

MIT

Author

michimani210