foo.cc: In function 'int main()':
foo.cc:15:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
foo.cc:17:21: 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 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

{"receive":"2020-04-27T14:46:49.152Z","handle":"2020-04-27T14:46:49.152Z","cache_start":"2020-04-27T14:46:49.158Z","read_cases":"2020-04-27T14:46:50.219Z","judge":"2020-04-27T14:46:50.220Z","done":"2020-04-27T14:46:51.280Z"}