foo.cc: In function 'int main()':
foo.cc:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
foo.cc:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&num,&sum);
         ~~~~~^~~~~~~~~~~~~~~~~~

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

{"receive":"2020-05-28T08:12:49.964Z","handle":"2020-05-28T08:12:49.964Z","cache_start":"2020-05-28T08:12:49.970Z","read_cases":"2020-05-28T08:12:50.598Z","judge":"2020-05-28T08:12:50.599Z","done":"2020-05-28T08:12:51.131Z"}