/in/foo.cc: In function 'void dfs(int, int, int)':
/in/foo.cc:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<g[x].size();i++)
                  ~^~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 590c9950d3d8a13210993af0 的数据未找到。', 'newbzoj', '590c9950d3d8a13210993af0')