Good Bye 2017 G. New Year and Original Order(数位DP)
令$S(n)$a56爆大奖在线娱乐将$S$的十进制位重排序后的数，如$S(324)=234$，求$\sum_{i=1}^nS(i)$。
$n\leq 10^{700}$。
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很久以前的奇怪但现在依旧成立的签名
attack is our red sun $$\color{red}{\boxed{\color{red}{attack\ is\ our\ red\ sun}}}$$ ------------------------------------------------------------------------------------------------------------------------
很久以前的奇怪但现在依旧成立的签名
attack is our red sun $$\color{red}{\boxed{\color{red}{attack\ is\ our\ red\ sun}}}$$ ------------------------------------------------------------------------------------------------------------------------
