foo.cc: In function 'int main()':
foo.cc:59:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("hpc.in","r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:60:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("hpc.out","w",stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-05-24T04:15:32.864Z","handle":"2020-05-24T04:15:32.864Z","cache_start":"2020-05-24T04:15:32.871Z","read_cases":"2020-05-24T04:15:32.982Z","judge":"2020-05-24T04:15:32.983Z","done":"2020-05-24T04:15:36.585Z"}