1 #include<cstdio>
 2 #include<iostream>
 3 #include<cstdlib>
 4 #include<cstring>
 5 using namespace std;
 6 int T,n,map[202][202],dui[202],y[202];
 7 bool zhao(int a1)
 8 {
 9     for(int i=1;i<=n;i++)
10       if(map[a1][i]&&!y[i])
11         {
12             y[i]=1;
13             if(!dui[i]||zhao(dui[i]))
14               {
15                   dui[i]=a1;
16                   return 1;
17               }
18         }
19     return 0;
20 }
21 bool work()
22 {
23     for(int i=1;i<=n;i++)
24       {
25         memset(y,0,sizeof(y));
26         if(!zhao(i))
27           return 0;
28       }
29     return 1;
30 }
31 int main()
32 {
33     scanf("%d",&T);
34     for(;T;T--)
35       {
36         memset(map,0,sizeof(map));
37         memset(dui,0,sizeof(dui));
38         scanf("%d",&n);
39           for(int i=1;i<=n;i++)
40             for(int j=1;j<=n;j++)
41               {
42                   int  a1;
43                   scanf("%d",&a1);
44                   if(a1)
45                     map[i][j]=1;
46               }
47         if(work())
48           printf("Yes\n");
49         else
50           printf("No\n");
51       }
52 }
53 

二分图匹配,行和列匹配出一条对角线

posted on 2016-03-01 22:38  xiyuedong  阅读(160)  评论(0编辑  收藏  举报