foo.cc: In function 'int main()':
foo.cc:26:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
foo.cc:28:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
      scanf("%lf%lf",&a[i].x,&a[i].y);
      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-06-11T12:11:11.625Z","handle":"2020-06-11T12:11:11.625Z","cache_start":"2020-06-11T12:11:11.633Z","read_cases":"2020-06-11T12:11:12.065Z","judge":"2020-06-11T12:11:12.065Z","done":"2020-06-11T12:11:12.806Z"}