foo.cc: In function 'int main()':
foo.cc:17:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
foo.cc:20:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&a[i]);
                      ^

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

{"receive":"2020-04-05T08:13:58.666Z","handle":"2020-04-05T08:13:58.666Z","cache_start":"2020-04-05T08:13:58.674Z","read_cases":"2020-04-05T08:13:59.206Z","judge":"2020-04-05T08:13:59.207Z","done":"2020-04-05T08:14:01.824Z"}