foo.c:2:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main()
      ^
foo.c: In function 'main':
foo.c:4:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&a,&n);
  ^

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

{"receive":"2020-05-11T16:34:54.240Z","handle":"2020-05-11T16:34:54.240Z","cache_start":"2020-05-11T16:34:54.249Z","read_cases":"2020-05-11T16:34:54.771Z","judge":"2020-05-11T16:34:54.771Z","done":"2020-05-11T16:34:54.831Z"}