#include <string>
namespace std {
template<class charT>
struct char_traits;
template <> struct char_traits<char>;
template <> struct char_traits<wchar_t>;
template<class charT, class traits, class Allocator >
class basic_string;
template<class charT, class traits, class Allocator>
basic_string<charT,traits,Allocator>
operator+(const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
basic_string<charT,traits,Allocator>
operator+(const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
basic_string<charT,traits,Allocator>
operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
basic_string<charT,traits,Allocator>
operator+(const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
basic_string<charT,traits,Allocator>
operator+(const basic_string<charT,traits,Allocator>& lhs, charT rhs);
template<class charT, class traits, class Allocator>
bool operator==(const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator==(const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator==(const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator!=(const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator!=(const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator!=(const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator< (const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator< (const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator< (const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator> (const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator> (const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator> (const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator<=(const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator<=(const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator<=(const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator>=(const basic_string<charT,traits,Allocator>& lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
bool operator>=(const basic_string<charT,traits,Allocator>& lhs,
const charT* rhs);
template<class charT, class traits, class Allocator>
bool operator>=(const charT* lhs,
const basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
void swap(basic_string<charT,traits,Allocator>& lhs,
basic_string<charT,traits,Allocator>& rhs);
template<class charT, class traits, class Allocator>
basic_istream<charT,traits>&
operator>>(basic_istream<charT,traits>& is,
basic_string<charT,traits,Allocator>& str);
template<class charT, class traits, class Allocator>
basic_ostream<charT, traits>&
operator<<(basic_ostream<charT, traits>& os,
const basic_string<charT,traits,Allocator>& str);
template<class charT, class traits, class Allocator>
basic_istream<charT,traits>&
getline(basic_istream<charT,traits>& is,
basic_string<charT,traits,Allocator>& str,
charT delim);
template<class charT, class traits, class Allocator>
basic_istream<charT,traits>&
getline(basic_istream<charT,traits>& is,
basic_string<charT,traits,Allocator>& str);
typedef basic_string<char> string;
typedef basic_string<wchar_t> wstring;
}