foo.cc: In function 'void init()':
foo.cc:22:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^

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

{"receive":"2020-03-28T05:44:42.285Z","handle":"2020-03-28T05:44:42.285Z","cache_start":"2020-03-28T05:44:42.292Z","read_cases":"2020-03-28T05:44:42.456Z","judge":"2020-03-28T05:44:42.457Z","done":"2020-03-28T05:44:43.381Z"}