foo.c: In function 'main':
foo.c:19:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", sentences);
  ^

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

{"receive":"2020-04-10T03:21:46.125Z","handle":"2020-04-10T03:21:46.125Z","cache_start":"2020-04-10T03:21:46.131Z","read_cases":"2020-04-10T03:21:46.254Z","judge":"2020-04-10T03:21:46.255Z","done":"2020-04-10T03:21:46.347Z"}