foo.cc: In function 'int main()':
foo.cc:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(q.size()>=g)
        ~~~~~~~~^~~
foo.cc:10:6: warning: unused variable 'a' [-Wunused-variable]
  int a[g+5];
      ^

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