foo.cc: In function 'int main()':
foo.cc:33:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<qq.size();j++)
           ~^~~~~~~~~~
foo.cc:51:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(j==qq.size())
      ~^~~~~~~~~~~

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

{"receive":"2020-05-23T04:12:31.783Z","handle":"2020-05-23T04:12:31.783Z","cache_start":"2020-05-23T04:12:31.789Z","read_cases":"2020-05-23T04:12:32.354Z","judge":"2020-05-23T04:12:32.356Z","done":"2020-05-23T04:12:33.035Z"}