/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:32:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[u].size();i++)
              ~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:58:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<g[i].size();j++)
               ~^~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', 'Data of problem 590c9c2bd3d8a13210993b33 not found.', 'newbzoj', '590c9c2bd3d8a13210993b33')