foo.cc: In function 'int main()':
foo.cc:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &L, &M);
     ~~~~~^~~~~~~~~~~~~~~~
foo.cc:16:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~

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

正在同步测试数据，请稍后
{"receive":"2020-07-01T07:53:41.826Z","handle":"2020-07-01T07:53:41.826Z","cache_start":"2020-07-01T07:53:41.832Z","read_cases":"2020-07-01T07:53:42.274Z","judge":"2020-07-01T07:53:42.275Z","done":"2020-07-01T07:53:42.482Z"}