foo.cc: In function 'int main()':
foo.cc:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
foo.cc:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
         ~~~~~^~~~~~~~~~~~

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

{"receive":"2020-07-26T03:17:20.657Z","handle":"2020-07-26T03:17:20.657Z","cache_start":"2020-07-26T03:17:20.665Z","read_cases":"2020-07-26T03:17:20.769Z","judge":"2020-07-26T03:17:20.770Z","done":"2020-07-26T03:17:21.109Z"}