foo.cc: In function 'int main()':
foo.cc:44:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
foo.cc:47:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",str);
   ~~~~~^~~~~~~~~~

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":"2020-08-11T07:43:09.875Z","handle":"2020-08-11T07:43:09.875Z","cache_start":"2020-08-11T07:43:09.882Z","read_cases":"2020-08-11T07:43:10.371Z","judge":"2020-08-11T07:43:10.372Z","done":"2020-08-11T07:43:10.742Z"}