foo.cc: In function 'int main()':
foo.cc:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
foo.cc:24:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1;i<=n;i++) scanf("%d",&a[i]);
                           ~~~~~^~~~~~~~~~~~
foo.cc:26:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&lc[i],&rc[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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

{"receive":"2020-08-10T00:16:00.288Z","handle":"2020-08-10T00:16:00.288Z","cache_start":"2020-08-10T00:16:00.297Z","read_cases":"2020-08-10T00:16:00.400Z","judge":"2020-08-10T00:16:00.401Z","done":"2020-08-10T00:16:04.718Z"}