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("%lf%d", &s, &n);
     ~~~~~^~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-05T11:28:42.753Z","handle":"2020-08-05T11:28:42.753Z","cache_start":"2020-08-05T11:28:42.760Z","read_cases":"2020-08-05T11:28:42.881Z","judge":"2020-08-05T11:28:42.883Z","done":"2020-08-05T11:28:43.735Z"}