Merge pull request #1 from assaulter/develop

カーマイケル数判定プログラムの実装完了。
Merge pull request #3 from assaulter/develop

minimum_scalar_productの開発が終了。
create Bribe the Prisoners.

Signed-off-by: Kazuki Kubo <kz@assaulter.org>
Merge branch 'develop' of github.com:assaulter/Procon_ruby into develop