/in/foo.cc: In function 'void DFS_1(int, int)':
/in/foo.cc:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<p[x].size();i++)
              ~^~~~~~~~~~~~
/in/foo.cc: In function 'void DFS_2(int, int)':
/in/foo.cc:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<p[x].size();i++)
              ~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:155:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<qu[i].size();j++)
                ~^~~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 590c9956d3d8a13210993b0a 的数据未找到。', 'newbzoj', '590c9956d3d8a13210993b0a')