foo.c: In function 'main':
foo.c:7:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &m, &n);
     ^

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

{"receive":"2020-03-30T08:00:03.007Z","handle":"2020-03-30T08:00:03.007Z","cache_start":"2020-03-30T08:00:03.013Z","read_cases":"2020-03-30T08:00:04.042Z","judge":"2020-03-30T08:00:04.042Z","done":"2020-03-30T08:00:07.627Z"}