判断桥 代码如下: #include<cstdio> #include<iostream> #include<algorithm> #include<vector> using namespace std; typedef pair<int, int> pii; const int max_n = 1100; const int max_m = 1e6 + 100; struct edge{ int to, rev,next; }E[max_m << 1]; int head[max_n]; int cnt = 1; vo...