foo.cc: In function 'int main()':
foo.cc:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d%d",&n,&m,&x,&y);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)
{"receive":"2020-07-28T07:33:08.870Z","handle":"2020-07-28T07:33:08.870Z","cache_start":"2020-07-28T07:33:08.877Z","read_cases":"2020-07-28T07:33:09.005Z","judge":"2020-07-28T07:33:09.008Z","done":"2020-07-28T07:33:09.373Z"}