bzoj1433

题解；

二分图最大匹配

代码：

#include<bits/stdc++.h>
using namespace std;
const int N=1e2;
int a[N],match[N],c[N][N],f[N],b[N],n,T;
int dfs(int x)
{
    for (int i=1;i<=n;i++)
     if (a[i]&&c[x][i]&&!f[i])
      {
          f[i]=1;
          if (!match[i]||dfs(match[i]))
           {
               match[i]=x;
               return 1;
           }
      }
    return 0;  
}
int main()
{
    scanf("%d",&T);
    while (T--)
     {
         int ff=0;
         memset(match,0,sizeof match);
         scanf("%d",&n);
         for (int i=1;i<=n;i++)scanf("%d",&a[i]);
         for (int i=1;i<=n;i++)scanf("%d",&b[i]);
         for (int i=1;i<=n;i++)
          for (int j=1;j<=n;j++)
           scanf("%d",&c[i][j]);
         for (int i=1;i<=n;i++)c[i][i]=1;
        for (int i=1;i<=n;i++)
         if (!a[i]||!b[i])
          {
              memset(f,0,sizeof f);
              if (!dfs(i))
               {
                   ff=1;
                   puts("T_T");
                   break;
               }
          }  
        if (!ff)puts("^_^");  
     }
}