foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^

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

{"receive":"2020-03-28T06:59:59.495Z","handle":"2020-03-28T06:59:59.495Z","done":"2020-03-28T06:59:59.884Z"}