这个题目  是有一定价值的   以后学会这么搞了；哈哈    

1 #include
     
       2 #include
      
        3 #include
       
         4 #include
        
          5 using namespace std; 6  7 int arr[10001][34]; 8  9 int main( )10 {11     int i,j,N,M,C,u,v,val;12     while( scanf("%d",&N) != EOF )13     {14         memset( arr,0,sizeof(arr) );15         for( j = 0; j < N; j++ )16         {17              scanf("%d",&C);18              for( i = 1; i <= C; i++ )19              {20                  scanf("%d",&val);21                  int bit = (1<<(j%32));22                  if( (arr[val][j/32]  & bit)  == 0 )23                      arr[val][j/32] += bit;24              }25         }26         scanf("%d",&M);27         for( i = 1; i <= M; i++ )28         {29             scanf("%d%d",&u,&v);30             for( j = 0; j <= 32; j++ )31             if( arr[u][j]&arr[v][j] )32             {33                 printf("Yes\n");34                 break;35             }36             if( j > 32 )printf("No\n");37         }38     }39     return 0;40 }