摘要:
D. #include<bits/stdc++.h> using namespace std; const int MAXN = 1e2 + 7; vector<vector<int> > from[MAXN]; int a[MAXN], b[MAXN], vis[MAXN], n, m, r; v 阅读全文
摘要:
#include<bits/stdc++.h> using namespace std; const int N = 4e5 + 7; typedef long long LL; const int MOD = 1e9 + 7; LL iv[N], sum[N], a[N]; inline LL r 阅读全文