foo.cc: In function 'int main()':
foo.cc:7:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
foo.cc:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&x,&y,&z);
   ~~~~~^~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-10T07:34:53.842Z","handle":"2020-08-10T07:34:53.842Z","cache_start":"2020-08-10T07:34:53.850Z","read_cases":"2020-08-10T07:34:53.962Z","judge":"2020-08-10T07:34:53.963Z","done":"2020-08-10T07:34:54.330Z"}