foo.cc: In function 'int main()':
foo.cc:7:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
foo.cc:10:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf",&a[i]);
                     ^

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

{"receive":"2020-05-12T13:45:51.357Z","handle":"2020-05-12T13:45:51.357Z","cache_start":"2020-05-12T13:45:51.369Z","read_cases":"2020-05-12T13:45:51.483Z","judge":"2020-05-12T13:45:51.485Z","done":"2020-05-12T13:45:51.595Z"}