第一题 每个视角上每个点挨个判断,每个连通块提供2的贡献 #include<bits/stdc++.h> using namespace std; #define PII pair<int,int> #define fi first #define se second #define mp make_pair #define LL long long #define pb push_back const int maxn = 25; const int INF = 0x3f3f3f3f; const int mod = 1e9 + 7; int N,M,S...