foo.cc: In function 'int main()':
foo.cc:2:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 int main(){register long long a,b;scanf("%lld%lld",&a,&b);printf("%lld\n",a+b);}
                                   ~~~~~^~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-08T14:28:49.303Z","handle":"2020-08-08T14:28:49.303Z","done":"2020-08-08T14:28:49.770Z"}