摘要： 要仔细看题，不然PE和各种莫名其妙的WA就来了！今天开始继续写博客！http://acm.hdu.edu.cn/showproblem.php?pid=3625/*Accepted 3625 0MS 248K 818B C++ Yu */#include<cstdio>#include<cstring>#define LL __int64LL dp[21][21];LL sum;double ans[21][21], p[21][21];void init(){ memset( dp, 0, sizeof dp); memset( ans, 0, sizeof ans) 阅读全文