foo.cc: In function 'int main()':
foo.cc:6:10: error: 'ckwckwckwckwckwckwckwckwckwckwckw' was not declared in this scope
    cout<<ckwckwckwckwckwckwckwckwckwckwckw
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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