foo.cc: In function 'int main()':
foo.cc:8:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &n);
    ~~~~~^~~~~~~~~~
foo.cc:11:12: 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":"2020-08-06T03:02:15.169Z","handle":"2020-08-06T03:02:15.169Z","cache_start":"2020-08-06T03:02:15.176Z","read_cases":"2020-08-06T03:02:15.288Z","judge":"2020-08-06T03:02:15.290Z","done":"2020-08-06T03:02:15.404Z"}