foo.cc: In function 'int main()':
foo.cc:82:9: warning: 'tmp2' may be used uninitialized in this function [-Wmaybe-uninitialized]
  MYBBSre(cnt2,b,n2,tmp2);
  ~~~~~~~^~~~~~~~~~~~~~~~
foo.cc:81:9: warning: 'tmp1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  MYBBSre(cnt1,a,n1,tmp1);
  ~~~~~~~^~~~~~~~~~~~~~~~

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