2-Click C++ Programming Contest Environment

This repository make it possible for programmers to create C++ programming contest environment by 2-Click.

Why is it useful?

It is very tedious job to install all necessary compilers and tools to local computer. There might be some errors to overcome to submit C++ program to programming contest service. What programmers want to do is not developping environment but developping program.

This repository uses VSCode Dev Container to create the environment with 2-Click.

Tested Environments

• Windows 10
• Mac with Intel Chip
• Mac with Apple Chip

Getting started

Requirements

Install the following applications.

• Docker Desktop
• VSCode

Setup environment

Open this repository with VSCode. Click left bottom corner of the VSCode window as follows, then choose "Reopen in Container".

Wait for a while. After builds and setups, you can write code in dev container environment. (First time, it takes for long time, but next time, it's quick to open the environment.)

This environment contains the following tools.

• online-judge-tools
• online-judge-template-generator
• atcoder-cli

Solve programming content problem

For example, let's solve AtCoder Library Practice Contest .

There are three tasks to do.

1. Login (Once)
2. Download problem
3. Solve and submit

First, login to the contest page to submit code afterwards.

To login/download/submit problem, the dev container uses oj tool. In this repository, there is the specific VSCode task to login contest site.

Choose Terminal -> Run Task from VSCode menu, then choose login. You should enter, https://atcoder.jp/contests/practice2 as url, your atcoder username as password and your atcoder password as password. If you haven't created account, please create it for register.

Second, choose Terminal -> Run Task from VSCode menu, then choose download code.

Enter the problem URL https://atcoder.jp/contests/practice2 to the input and click enter. Inside the task, oj-prepare https://atcoder.jp/contests/practice2 is executed, automatically problem set is donwloaded to under contest/atcoder.jp/practice2 directory.

Open, contest/atcoder.jp/practice2/practice2_a/main.cpp in VSCode, then solve the problem.

Lastly, you can submit the code to AtCoder. Choose Terminal -> Run Task from VSCode menu while opening the solved main.cpp code, then choose submit code.

Boom! The code is tested and submitted to the contest. If it has any error, you can see it on Terminal.

Tips

Use debugger

To debug code, click Run start Debugging in menu while opening code. Then, input should be put in terminal. The following shows how to debug the code.

cpp-env.mp4

Use git to commit problem codes.

Any file under content directory, it is ignored by .gitignore. You can delete contest line from .gitignore to commit these files.