foo.cc: In function 'int main()':
foo.cc:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<ini.size();i++)
               ~^~~~~~~~~~~
foo.cc:103:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < outPut.size(); i++) 
                  ~~^~~~~~~~~~~~~~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。