/in/foo.cc: In function 'int main()':
/in/foo.cc:12:4: error: 'cout' was not declared in this scope
    cout<<"No"<<endl;
    ^~~~
/in/foo.cc:12:16: error: 'endl' was not declared in this scope
    cout<<"No"<<endl;
                ^~~~
/in/foo.cc:16:2: error: 'cout' was not declared in this scope
  cout<<"Yes"<<endl;
  ^~~~
/in/foo.cc:16:15: error: 'endl' was not declared in this scope
  cout<<"Yes"<<endl;
               ^~~~