foo.cc: In function 'int main()':
foo.cc:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf %lf %lf", &x[i], &y[i], &s[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-07-22T03:15:15.363Z","handle":"2020-07-22T03:15:15.363Z","cache_start":"2020-07-22T03:15:15.375Z","read_cases":"2020-07-22T03:15:15.564Z","judge":"2020-07-22T03:15:15.565Z","done":"2020-07-22T03:15:16.613Z"}