foo.cc: In function 'int main()':
foo.cc:88:6: warning: unused variable 'temp' [-Wunused-variable]
   ll temp;
      ^~~~
foo.cc:80:16: warning: unused variable 'limitban' [-Wunused-variable]
  int t, level, limitban;
                ^~~~~~~~

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