foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~
foo.c:8:3: warning: ignoring return value of 'scanf', 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":"2020-07-18T23:33:23.914Z","handle":"2020-07-18T23:33:23.914Z","cache_start":"2020-07-18T23:33:23.925Z","read_cases":"2020-07-18T23:33:24.156Z","judge":"2020-07-18T23:33:24.158Z","done":"2020-07-18T23:33:24.392Z"}