foo.cc: In function 'int main()':
foo.cc:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen("cards.in","r",stdin);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:9:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen("cards.out","w",stdout);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)
{"receive":"2020-07-11T15:08:07.464Z","handle":"2020-07-11T15:08:07.464Z","cache_start":"2020-07-11T15:08:07.470Z","read_cases":"2020-07-11T15:08:07.612Z","judge":"2020-07-11T15:08:07.627Z","done":"2020-07-11T15:08:08.130Z"}