运行 ID: 110292

Main.cc: In function ‘int main()’:
Main.cc:5:2: error: ‘cin’ was not declared in this scope
  cin>>n>>m;
  ^~~
Main.cc:5:2: note: suggested alternative: ‘main’
  cin>>n>>m;
  ^~~
  main
Main.cc:8:11: error: ‘cout’ was not declared in this scope
   case 8: cout<<"7"; break;
           ^~~~
Main.cc:18:3: error: ‘cout’ was not declared in this scope
   cout<<623;
   ^~~~
Main.cc:21:3: error: ‘cout’ was not declared in this scope
   cout<<27893;
   ^~~~