foo.cc: In function 'int main()':
foo.cc:15:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("10.in.txt","r",stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
foo.cc:16:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("10.out.txt","w",stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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

正在同步测试数据，请稍后
{"receive":"2020-08-17T00:58:21.403Z","handle":"2020-08-17T00:58:21.404Z","cache_start":"2020-08-17T00:58:21.465Z","read_cases":"2020-08-17T00:58:30.197Z","judge":"2020-08-17T00:58:30.199Z","done":"2020-08-17T00:58:47.206Z"}