/in/foo.cc: In function 'void Tarjan(int, int)':
/in/foo.cc:27:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<f[u].size(); i++)
                  ~^~~~~~~~~~~~
/in/foo.cc:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<f2[u].size(); i++)
                  ~^~~~~~~~~~~~~

FormatError('config file not found',)