foo.cc: In function 'int main()':
foo.cc:110:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  110 |      scanf("%d%d",&E_m,&n);
      |      ~~~~~^~~~~~~~~~~~~~~~
foo.cc:113:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  113 |          scanf("%d%d",&x,&y);
      |          ~~~~~^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务