foo.cc: In function 'int main()':
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&k);
  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:10:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x[i]);
   ~~~~~^~~~~~~~~~~~

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

{"receive":"2020-08-08T12:34:31.123Z","handle":"2020-08-08T12:34:31.123Z","cache_start":"2020-08-08T12:34:31.130Z","read_cases":"2020-08-08T12:34:31.246Z","judge":"2020-08-08T12:34:31.247Z","done":"2020-08-08T12:34:32.352Z"}