foo.cc: In function 'int main()':
foo.cc:19:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d" , &n, &m, &p);
                                 ^
foo.cc:27:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
                              ^
foo.cc:33:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
        scanf("%d%d" , &x , &y);
                               ^

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

{"receive":"2020-03-23T09:05:07.028Z","handle":"2020-03-23T09:05:07.028Z","cache_start":"2020-03-23T09:05:07.036Z","read_cases":"2020-03-23T09:05:07.766Z","judge":"2020-03-23T09:05:07.766Z","done":"2020-03-23T09:05:08.198Z"}