foo.cc: In function 'int main()':
foo.cc:30:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&k,&w);
     ~~~~~^~~~~~~~~~~~~~

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

{"receive":"2020-05-30T08:03:38.370Z","handle":"2020-05-30T08:03:38.370Z","cache_start":"2020-05-30T08:03:38.377Z","read_cases":"2020-05-30T08:03:38.929Z","judge":"2020-05-30T08:03:38.929Z","done":"2020-05-30T08:03:39.639Z"}