foo.cc: In function 'std::__cxx11::string solve()':
foo.cc:14:2: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if(a<b) return "Even";
  ^~
foo.cc:14:2: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]

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