foo.c: In function 'main':
foo.c:5:2: 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":"2020-07-19T00:40:30.588Z","handle":"2020-07-19T00:40:30.588Z","cache_start":"2020-07-19T00:40:30.595Z","read_cases":"2020-07-19T00:40:30.770Z","judge":"2020-07-19T00:40:30.771Z","done":"2020-07-19T00:40:45.859Z"}