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

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

{"receive":"2020-07-04T16:12:58.184Z","handle":"2020-07-04T16:12:58.184Z","cache_start":"2020-07-04T16:12:58.199Z","read_cases":"2020-07-04T16:12:58.353Z","judge":"2020-07-04T16:12:58.359Z","done":"2020-07-04T16:12:59.813Z"}