foo.c: In function 'main':
foo.c:5:2: warning: ignoring return value of 'scanf', 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":"2020-05-13T09:04:35.408Z","handle":"2020-05-13T09:04:35.408Z","cache_start":"2020-05-13T09:04:35.416Z","read_cases":"2020-05-13T09:04:35.560Z","judge":"2020-05-13T09:04:35.563Z","done":"2020-05-13T09:04:35.868Z"}