摘要: \(\text{Code}\) #include<cstdio> #include<map> #define LL long long using namespace std; const int M = 5e6; LL n,P,inv2,inv3,f[M + 5],tot; int vis[M + 阅读全文
posted @ 2022-03-13 19:35 RiverSheep 阅读(29) 评论(0) 推荐(0)