https://docs.rs/proconio/0.4.3/proconio/
https://qiita.com/maguro_tuna/items/316068eeb8c5b9b31ed8 https://github.com/tanakh/cargo-atcoder
Login at atcoder
cargo atcoder login
New contest
cargo atcoder new <contest-name>
Test a script
cargo atcoder test <problem-id> [case-num]...
Submit a script
cargo atcoder submit <problem-id>