foo.cc: In function 'int main()':
foo.cc:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&a,&b);
     ~~~~~^~~~~~~~~~~~~~~~~~

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":"2020-07-15T03:30:21.128Z","handle":"2020-07-15T03:30:21.128Z","cache_start":"2020-07-15T03:30:21.137Z","read_cases":"2020-07-15T03:30:21.565Z","judge":"2020-07-15T03:30:21.566Z","done":"2020-07-15T03:30:21.701Z"}