/in/foo.cc: In function 'void DFS(int, int)':
/in/foo.cc:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<no[x].size();++i)
                 ~^~~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 590c9c32d3d8a13210993b53 的数据未找到。', 'newbzoj', '590c9c32d3d8a13210993b53')