摘要:
#include<bits/stdc++.h> #define ll long long #define LL long long using namespace std; const int maxn=210; const int mod=1e9+7; ll a[maxn*2][maxn*2]; ll b[maxn*2][maxn*2]; int n; int cet(){ ll ans=1,s 阅读全文
摘要:
https://www.luogu.org/blog/shiqingyu/solution-p5170 公式要记 (ai+b)/c; #include<bits/stdc++.h> #define ll long long using namespace std; const int mod=998 阅读全文