namespace std { template < typename > class allocator; template < class > struct char_traits; template < typename b, typename = char_traits< b >, typename = allocator< b > > class basic_string; typedef basic_string< char > c; template < typename b, typename = char_traits< b > > class basic_istream; typedef basic_istream< char > d; template < typename > class allocator {}; template < typename b, typename, typename e > class basic_string {   struct _Rep {     b *_M_refdata();   };   struct f {     f(b *g, e) : h(g) {}     b *h;   } i;   _Rep &j() {}  public:   basic_string() : i(j()._M_refdata(), e()) {} }; template < typename b, typename k, typename e > basic_istream< b, k > &getline(basic_istream< b, k > &,                                basic_string< b, k, e > &); class ios_base { public:   class Init {   public:     Init();   }; }; extern d cin; ios_base::Init l; }
 main() {   std::c a;   getline(std::cin, a); }