foo.cc: In function 'int main()':
foo.cc:20:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d %d", &N, &L, &W);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lf %lf", &C, &R);
     ~~~~~^~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-11T12:40:49.211Z","handle":"2020-08-11T12:40:49.211Z","cache_start":"2020-08-11T12:40:49.219Z","read_cases":"2020-08-11T12:40:49.330Z","judge":"2020-08-11T12:40:49.331Z","done":"2020-08-11T12:40:49.602Z"}