foo.cc: In function 'int main()':
foo.cc:23:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d",&n,&r);
 ~~~~~^~~~~~~~~~~~~~

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

正在同步测试数据，请稍后
{"receive":"2020-07-10T04:01:34.005Z","handle":"2020-07-10T04:01:34.005Z","cache_start":"2020-07-10T04:01:34.013Z","read_cases":"2020-07-10T04:01:45.203Z","judge":"2020-07-10T04:01:45.204Z","done":"2020-07-10T04:01:45.605Z"}