/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:12:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < G[u].size(); i++)
                 ~~^~~~~~~~~~~~~
/in/foo.cc: In function 'void rdfs(int)':
/in/foo.cc:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < rG[u].size(); i++)
                 ~~^~~~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 590c9c2bd3d8a13210993b33 的数据未找到。', 'newbzoj', '590c9c2bd3d8a13210993b33')