foo.cc: In function 'int main()':
foo.cc:82:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   82 |  scanf("%d%d%d",&c,&s,&r);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:87:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   87 |         scanf("%d%d%d",&o[i],&d[i],&n[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务