atcoder-cli usage : http://tatamo.81.la/blog/2018/12/07/atcoder-cli-tutorial/ online-jadge-tools usage : https://online-judge-tools.readthedocs.io/en/master/introduction.ja.html
$ acc login
$ oj login https://beta.atcoder.jp/
If you want to fetch abc140/A,
$ acc new abc140 --template cpp
Select problem A
$ cd abc140/a
$ vim main.cpp
$ g++ -std=gnu++1y -O2 -I/opt/boost/gcc/include -L/opt/boost/gcc/lib -o ./a.out ./main.cpp
$ oj t -d ./tests/
$ acc submit
$ cd ../
$ acc add --template cpp
$ vim .config/atcoder-cli-nodejs/cpp/main.cpp