https://doujinblog.org/%e5%90%8c%e4%ba%ba%e3%82%b2%e3%83%bc%e3%83%a0-2306108bit-powers-%e5%b4%96%e3%81%a3%e3%81%b7%e3%81%a1%e6%97%85%e9%a4%a8-rj01066401/