摘要：
"传送门" 题意： 求$\displaystyle \sum_{i=1}^n i^mm^i,n\leq 10^9,m\leq 1000$。 思路： $m$比较小，考虑从$m$入手进行递推： 设$f(j)=\sum_{i=1}^ni^jm^i$，则$mf(j)=\sum_{i=1}^ni^jm^{i+ 阅读全文
摘要：
A. 组队比赛 签到。 Code cpp / Author: heyuhhh Created Time: 2020/4/18 12:10:50 / include include include include include include include include include incl 阅读全文