foo.cc: In function 'int main()':
foo.cc:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
foo.cc:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&m);
  ~~~~~^~~~~~~~~
foo.cc:27:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d%d",&x,&y,&k);
    ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:31:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:35:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&m);
   ~~~~~^~~~~~~~~

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

{"receive":"2020-05-31T07:34:56.924Z","handle":"2020-05-31T07:34:56.924Z","cache_start":"2020-05-31T07:34:56.931Z","read_cases":"2020-05-31T07:34:57.650Z","judge":"2020-05-31T07:34:57.651Z","done":"2020-05-31T07:34:57.971Z"}