foo.cc: In function 'int main()':
foo.cc:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
foo.cc:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&a[i].l,&a[i].r);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-13T10:53:16.267Z","handle":"2020-08-13T10:53:16.267Z","cache_start":"2020-08-13T10:53:16.277Z","read_cases":"2020-08-13T10:53:16.379Z","judge":"2020-08-13T10:53:16.380Z","done":"2020-08-13T10:53:17.573Z"}