摘要: A 签到题,注意$x=0$的特例,求逆元即可 #include<bits/stdc++.h> #define inf 2139062143 #define ll long long #define db double #define ld long double #define ull unsign 阅读全文
posted @ 2021-08-10 16:12 jack_yyc 阅读(71) 评论(0) 推荐(0) 编辑