1.费马小定理 123456789101112typedef long long ll;const ll mod=998244353;inline ll qpow(ll a,ll b){ ll res=1; while(b>0){ if(b&1)res=res*a%mod; a=a*a%mod; b>&g

因为要开始尝试java web项目的制作，那就需要用到数据库来进行交互，所以就安装mysql和navicat来做准备。mysql安装参考博客：https://blog.csdn.net/qq_23994787/article/details/80648731 步骤一：下载mysql 5.7官方下载地址：https://dev.mysql.com/downloads/mysql/5.7.html#

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