foo.cc: In function 'int main()':
foo.cc:5:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &a, &b);
                        ^

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

{"receive":"2020-03-23T05:27:18.050Z","handle":"2020-03-23T05:27:18.050Z","cache_start":"2020-03-23T05:27:18.058Z","read_cases":"2020-03-23T05:27:18.181Z","judge":"2020-03-23T05:27:18.184Z","done":"2020-03-23T05:27:18.354Z"}