描述 Cows are such finicky eaters. Each cow has a preference for certain foods and drinks, and she will consume no others. Farmer John has cooked fabulous meals for his cows, but he forgot to check
[题目链接] 思路:最大流变形—顶点也有容量限制的情况! 代码: #include<iostream>#include<cstdio>#include<cstring>#include<vector>#include<queue>#include<algorithm>using namespace std;typedef long long ll;const int in