foo.cc: In function 'int main()':
foo.cc:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&t);
  ~~~~~^~~~~~~~~
foo.cc:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&n);
   ~~~~~^~~~~~~~~~~

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

{"receive":"2020-08-10T12:04:31.722Z","handle":"2020-08-10T12:04:31.722Z","cache_start":"2020-08-10T12:04:31.730Z","read_cases":"2020-08-10T12:04:31.865Z","judge":"2020-08-10T12:04:31.866Z","done":"2020-08-10T12:04:32.109Z"}