// -*- C++ -*-

//===----------------------------------------------------------------------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_BITSET

#define _LIBCPP_BITSET

// clang-format off

/*

    bitset synopsis

namespace std

{

namespace std {

template <size_t N>

class bitset

{

public:

    // bit reference:

    class reference

    {

        friend class bitset;

        reference() noexcept;

    public:

        ~reference() noexcept;

        reference& operator=(bool x) noexcept;           // for b[i] = x;

        reference& operator=(const reference&) noexcept; // for b[i] = b[j];

        bool operator~() const noexcept;                 // flips the bit

        operator bool() const noexcept;                  // for x = b[i];

        reference& flip() noexcept;                      // for b[i].flip();

    };

    // 23.3.5.1 constructors:

    constexpr bitset() noexcept;

    constexpr bitset(unsigned long long val) noexcept;

    template <class charT>

        constexpr explicit bitset(const charT* str,

            typename basic_string<charT>::size_type n = basic_string<charT>::npos,

            charT zero = charT('0'), charT one = charT('1'));                                // until C++26, constexpr since C++23

    template <class charT>

        constexpr explicit bitset(const charT* str,

            typename basic_string_view<charT>::size_type n = basic_string_view<charT>::npos,

            charT zero = charT('0'), charT one = charT('1'));                                // since C++26

    template<class charT, class traits>

        explicit bitset(

            const basic_string_view<charT,traits>& str,

            typename basic_string_view<charT,traits>::size_type pos = 0,

            typename basic_string_view<charT,traits>::size_type n = basic_string_view<charT,traits>::npos,

            charT zero = charT('0'), charT one = charT('1'));                                // since C++26

    template<class charT, class traits, class Allocator>

        constexpr explicit bitset(

            const basic_string<charT,traits,Allocator>& str,

            typename basic_string<charT,traits,Allocator>::size_type pos = 0,

            typename basic_string<charT,traits,Allocator>::size_type n = basic_string<charT,traits,Allocator>::npos,

            charT zero = charT('0'), charT one = charT('1'));                                // constexpr since C++23

    // 23.3.5.2 bitset operations:

    bitset& operator&=(const bitset& rhs) noexcept; // constexpr since C++23

    bitset& operator|=(const bitset& rhs) noexcept; // constexpr since C++23

    bitset& operator^=(const bitset& rhs) noexcept; // constexpr since C++23

    bitset& operator<<=(size_t pos) noexcept;       // constexpr since C++23

    bitset& operator>>=(size_t pos) noexcept;       // constexpr since C++23

    bitset& set() noexcept;                         // constexpr since C++23

    bitset& set(size_t pos, bool val = true);       // constexpr since C++23

    bitset& reset() noexcept;                       // constexpr since C++23

    bitset& reset(size_t pos);                      // constexpr since C++23

    bitset operator~() const noexcept;              // constexpr since C++23

    bitset& flip() noexcept;                        // constexpr since C++23

    bitset& flip(size_t pos);                       // constexpr since C++23

    // element access:

    constexpr bool operator[](size_t pos) const;

    reference operator[](size_t pos);            // constexpr since C++23

    unsigned long to_ulong() const;              // constexpr since C++23

    unsigned long long to_ullong() const;        // constexpr since C++23

    template <class charT, class traits, class Allocator> // constexpr since C++23

        basic_string<charT, traits, Allocator> to_string(charT zero = charT('0'), charT one = charT('1')) const;

    template <class charT, class traits> // constexpr since C++23

        basic_string<charT, traits, allocator<charT> > to_string(charT zero = charT('0'), charT one = charT('1')) const;

    template <class charT> // constexpr since C++23

        basic_string<charT, char_traits<charT>, allocator<charT> > to_string(charT zero = charT('0'), charT one = charT('1')) const;

    basic_string<char, char_traits<char>, allocator<char> > to_string(char zero = '0', char one = '1') const; // constexpr since C++23

    size_t count() const noexcept;                     // constexpr since C++23

    constexpr size_t size() const noexcept;            // constexpr since C++23

    bool operator==(const bitset& rhs) const noexcept; // constexpr since C++23

    bool operator!=(const bitset& rhs) const noexcept; // removed in C++20

    bool test(size_t pos) const;                       // constexpr since C++23

    bool all() const noexcept;                         // constexpr since C++23

    bool any() const noexcept;                         // constexpr since C++23

    bool none() const noexcept;                        // constexpr since C++23

    bitset<N> operator<<(size_t pos) const noexcept;   // constexpr since C++23

    bitset<N> operator>>(size_t pos) const noexcept;   // constexpr since C++23

};

// 23.3.5.3 bitset operators:

template <size_t N>

bitset<N> operator&(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23

template <size_t N>

bitset<N> operator|(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23

template <size_t N>

bitset<N> operator^(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23

template <class charT, class traits, size_t N>

basic_istream<charT, traits>&

operator>>(basic_istream<charT, traits>& is, bitset<N>& x);

template <class charT, class traits, size_t N>

basic_ostream<charT, traits>&

operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);

template <size_t N> struct hash<std::bitset<N>>;

}  // std

*/

// clang-format on

#include <__algorithm/count.h>

#include <__algorithm/fill.h>

#include <__algorithm/find.h>

#include <__assert> // all public C++ headers provide the assertion handler

#include <__bit_reference>

#include <__config>

#include <__functional/hash.h>

#include <__functional/unary_function.h>

#include <__type_traits/is_char_like_type.h>

#include <climits>

#include <cstddef>

#include <stdexcept>

#include <string_view>

#include <version>

// standard-mandated includes

// [bitset.syn]

#include <iosfwd>

#include <string>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)

#  pragma GCC system_header

#endif

_LIBCPP_PUSH_MACROS

#include <__undef_macros>

_LIBCPP_BEGIN_NAMESPACE_STD

template <size_t _N_words, size_t _Size>

class __bitset;

template <size_t _N_words, size_t _Size>

struct __has_storage_type<__bitset<_N_words, _Size> > {

  static const bool value = true;

};

template <size_t _N_words, size_t _Size>

class __bitset {

public:

  typedef ptrdiff_t difference_type;

  typedef size_t size_type;

  typedef size_type __storage_type;

protected:

  typedef __bitset __self;

  typedef __storage_type* __storage_pointer;

  typedef const __storage_type* __const_storage_pointer;

  static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);

  friend class __bit_reference<__bitset>;

  friend class __bit_const_reference<__bitset>;

  friend class __bit_iterator<__bitset, false>;

  friend class __bit_iterator<__bitset, true>;

  friend struct __bit_array<__bitset>;

  __storage_type __first_[_N_words];

  typedef __bit_reference<__bitset> reference;

  typedef __bit_const_reference<__bitset> const_reference;

  typedef __bit_iterator<__bitset, false> iterator;

  typedef __bit_iterator<__bitset, true> const_iterator;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t __pos) _NOEXCEPT {

    return reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT {

    return const_reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t __pos) _NOEXCEPT {

    return iterator(__first_ + __pos / __bits_per_word, __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t __pos) const _NOEXCEPT {

    return const_iterator(__first_ + __pos / __bits_per_word, __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator&=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator|=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator^=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void flip() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const {

    return to_ulong(integral_constant < bool, _Size< sizeof(unsigned long) * CHAR_BIT>());

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const {

    return to_ullong(integral_constant < bool, _Size< sizeof(unsigned long long) * CHAR_BIT>());

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI size_t __hash_code() const _NOEXCEPT;

private:

#ifdef _LIBCPP_CXX03_LANG

  void __init(unsigned long long __v, false_type) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI void __init(unsigned long long __v, true_type) _NOEXCEPT;

#endif // _LIBCPP_CXX03_LANG

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong(false_type) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong(true_type) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong(false_type) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong(true_type) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong(true_type, false_type) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong(true_type, true_type) const;

};

template <size_t _N_words, size_t _Size>

inline _LIBCPP_CONSTEXPR __bitset<_N_words, _Size>::__bitset() _NOEXCEPT

#ifndef _LIBCPP_CXX03_LANG

    : __first_{0}

#endif

{

#ifdef _LIBCPP_CXX03_LANG

  std::fill_n(__first_, _N_words, __storage_type(0));

#endif

}

#ifdef _LIBCPP_CXX03_LANG

template <size_t _N_words, size_t _Size>

void __bitset<_N_words, _Size>::__init(unsigned long long __v, false_type) _NOEXCEPT {

  __storage_type __t[sizeof(unsigned long long) / sizeof(__storage_type)];

  size_t __sz = _Size;

  for (size_t __i = 0; __i < sizeof(__t) / sizeof(__t[0]); ++__i, __v >>= __bits_per_word, __sz -= __bits_per_word)

    if (__sz < __bits_per_word)

      __t[__i] = static_cast<__storage_type>(__v) & (1ULL << __sz) - 1;

    else

      __t[__i] = static_cast<__storage_type>(__v);

  std::copy(__t, __t + sizeof(__t) / sizeof(__t[0]), __first_);

  std::fill(

      __first_ + sizeof(__t) / sizeof(__t[0]), __first_ + sizeof(__first_) / sizeof(__first_[0]), __storage_type(0));

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI void __bitset<_N_words, _Size>::__init(unsigned long long __v, true_type) _NOEXCEPT {

  __first_[0] = __v;

  if (_Size < __bits_per_word)

    __first_[0] &= (1ULL << _Size) - 1;

  std::fill(__first_ + 1, __first_ + sizeof(__first_) / sizeof(__first_[0]), __storage_type(0));

}

#endif // _LIBCPP_CXX03_LANG

template <size_t _N_words, size_t _Size>

inline _LIBCPP_CONSTEXPR __bitset<_N_words, _Size>::__bitset(unsigned long long __v) _NOEXCEPT

#ifndef _LIBCPP_CXX03_LANG

#  if __SIZEOF_SIZE_T__ == 8

    : __first_{__v}

#  elif __SIZEOF_SIZE_T__ == 4

    : __first_{static_cast<__storage_type>(__v),

               _Size >= 2 * __bits_per_word

                   ? static_cast<__storage_type>(__v >> __bits_per_word)

                   : static_cast<__storage_type>((__v >> __bits_per_word) &

                                                 (__storage_type(1) << (_Size - __bits_per_word)) - 1)}

#  else

#    error This constructor has not been ported to this platform

#  endif

#endif

{

#ifdef _LIBCPP_CXX03_LANG

  __init(__v, integral_constant<bool, sizeof(unsigned long long) == sizeof(__storage_type)>());

#endif

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<_N_words, _Size>::operator&=(const __bitset& __v) _NOEXCEPT {

  for (size_type __i = 0; __i < _N_words; ++__i)

    __first_[__i] &= __v.__first_[__i];

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<_N_words, _Size>::operator|=(const __bitset& __v) _NOEXCEPT {

  for (size_type __i = 0; __i < _N_words; ++__i)

    __first_[__i] |= __v.__first_[__i];

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<_N_words, _Size>::operator^=(const __bitset& __v) _NOEXCEPT {

  for (size_type __i = 0; __i < _N_words; ++__i)

    __first_[__i] ^= __v.__first_[__i];

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void __bitset<_N_words, _Size>::flip() _NOEXCEPT {

  // do middle whole words

  size_type __n         = _Size;

  __storage_pointer __p = __first_;

  for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)

    *__p = ~*__p;

  // do last partial word

  if (__n > 0) {

    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);

    __storage_type __b = *__p & __m;

    *__p &= ~__m;

    *__p |= ~__b & __m;

  }

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long

__bitset<_N_words, _Size>::to_ulong(false_type) const {

  const_iterator __e = __make_iter(_Size);

  const_iterator __i = std::find(__make_iter(sizeof(unsigned long) * CHAR_BIT), __e, true);

  if (__i != __e)

    __throw_overflow_error("bitset to_ulong overflow error");

  return __first_[0];

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long

__bitset<_N_words, _Size>::to_ulong(true_type) const {

  return __first_[0];

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long

__bitset<_N_words, _Size>::to_ullong(false_type) const {

  const_iterator __e = __make_iter(_Size);

  const_iterator __i = std::find(__make_iter(sizeof(unsigned long long) * CHAR_BIT), __e, true);

  if (__i != __e)

    __throw_overflow_error("bitset to_ullong overflow error");

  return to_ullong(true_type());

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long

__bitset<_N_words, _Size>::to_ullong(true_type) const {

  return to_ullong(true_type(), integral_constant<bool, sizeof(__storage_type) < sizeof(unsigned long long)>());

}

template <size_t _N_words, size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long

__bitset<_N_words, _Size>::to_ullong(true_type, false_type) const {

  return __first_[0];

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long

__bitset<_N_words, _Size>::to_ullong(true_type, true_type) const {

  unsigned long long __r = __first_[0];

  for (size_t __i = 1; __i < sizeof(unsigned long long) / sizeof(__storage_type); ++__i)

    __r |= static_cast<unsigned long long>(__first_[__i]) << (sizeof(__storage_type) * CHAR_BIT);

  return __r;

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool __bitset<_N_words, _Size>::all() const _NOEXCEPT {

  // do middle whole words

  size_type __n               = _Size;

  __const_storage_pointer __p = __first_;

  for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)

    if (~*__p)

      return false;

  // do last partial word

  if (__n > 0) {

    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);

    if (~*__p & __m)

      return false;

  }

  return true;

}

template <size_t _N_words, size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool __bitset<_N_words, _Size>::any() const _NOEXCEPT {

  // do middle whole words

  size_type __n               = _Size;

  __const_storage_pointer __p = __first_;

  for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)

    if (*__p)

      return true;

  // do last partial word

  if (__n > 0) {

    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);

    if (*__p & __m)

      return true;

  }

  return false;

}

template <size_t _N_words, size_t _Size>

inline size_t __bitset<_N_words, _Size>::__hash_code() const _NOEXCEPT {

  size_t __h = 0;

  for (size_type __i = 0; __i < _N_words; ++__i)

    __h ^= __first_[__i];

  return __h;

}

template <size_t _Size>

class __bitset<1, _Size> {

public:

  typedef ptrdiff_t difference_type;

  typedef size_t size_type;

  typedef size_type __storage_type;

protected:

  typedef __bitset __self;

  typedef __storage_type* __storage_pointer;

  typedef const __storage_type* __const_storage_pointer;

  static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);

  friend class __bit_reference<__bitset>;

  friend class __bit_const_reference<__bitset>;

  friend class __bit_iterator<__bitset, false>;

  friend class __bit_iterator<__bitset, true>;

  friend struct __bit_array<__bitset>;

  __storage_type __first_;

  typedef __bit_reference<__bitset> reference;

  typedef __bit_const_reference<__bitset> const_reference;

  typedef __bit_iterator<__bitset, false> iterator;

  typedef __bit_iterator<__bitset, true> const_iterator;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t __pos) _NOEXCEPT {

    return reference(&__first_, __storage_type(1) << __pos);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT {

    return const_reference(&__first_, __storage_type(1) << __pos);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t __pos) _NOEXCEPT {

    return iterator(&__first_ + __pos / __bits_per_word, __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t __pos) const _NOEXCEPT {

    return const_iterator(&__first_ + __pos / __bits_per_word, __pos % __bits_per_word);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator&=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator|=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator^=(const __bitset& __v) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void flip() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI size_t __hash_code() const _NOEXCEPT;

};

template <size_t _Size>

inline _LIBCPP_CONSTEXPR __bitset<1, _Size>::__bitset() _NOEXCEPT : __first_(0) {}

template <size_t _Size>

inline _LIBCPP_CONSTEXPR __bitset<1, _Size>::__bitset(unsigned long long __v) _NOEXCEPT

    : __first_(_Size == __bits_per_word ? static_cast<__storage_type>(__v)

                                        : static_cast<__storage_type>(__v) & ((__storage_type(1) << _Size) - 1)) {}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<1, _Size>::operator&=(const __bitset& __v) _NOEXCEPT {

  __first_ &= __v.__first_;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<1, _Size>::operator|=(const __bitset& __v) _NOEXCEPT {

  __first_ |= __v.__first_;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

__bitset<1, _Size>::operator^=(const __bitset& __v) _NOEXCEPT {

  __first_ ^= __v.__first_;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void __bitset<1, _Size>::flip() _NOEXCEPT {

  __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);

  __first_           = ~__first_;

  __first_ &= __m;

}

template <size_t _Size>

inline _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long __bitset<1, _Size>::to_ulong() const {

  return __first_;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long __bitset<1, _Size>::to_ullong() const {

  return __first_;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool __bitset<1, _Size>::all() const _NOEXCEPT {

  __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);

  return !(~__first_ & __m);

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool __bitset<1, _Size>::any() const _NOEXCEPT {

  __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);

  return __first_ & __m;

}

template <size_t _Size>

inline size_t __bitset<1, _Size>::__hash_code() const _NOEXCEPT {

  return __first_;

}

template <>

class __bitset<0, 0> {

public:

  typedef ptrdiff_t difference_type;

  typedef size_t size_type;

  typedef size_type __storage_type;

protected:

  typedef __bitset __self;

  typedef __storage_type* __storage_pointer;

  typedef const __storage_type* __const_storage_pointer;

  static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);

  friend class __bit_reference<__bitset>;

  friend class __bit_const_reference<__bitset>;

  friend class __bit_iterator<__bitset, false>;

  friend class __bit_iterator<__bitset, true>;

  friend struct __bit_array<__bitset>;

  typedef __bit_reference<__bitset> reference;

  typedef __bit_const_reference<__bitset> const_reference;

  typedef __bit_iterator<__bitset, false> iterator;

  typedef __bit_iterator<__bitset, true> const_iterator;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t) _NOEXCEPT {

    return reference(nullptr, 1);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const_reference __make_ref(size_t) const _NOEXCEPT {

    return const_reference(nullptr, 1);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t) _NOEXCEPT {

    return iterator(nullptr, 0);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t) const _NOEXCEPT {

    return const_iterator(nullptr, 0);

  }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator&=(const __bitset&) _NOEXCEPT {}

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator|=(const __bitset&) _NOEXCEPT {}

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator^=(const __bitset&) _NOEXCEPT {}

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void flip() _NOEXCEPT {}

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const { return 0; }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const { return 0; }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT { return true; }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT { return false; }

  _LIBCPP_HIDE_FROM_ABI size_t __hash_code() const _NOEXCEPT { return 0; }

};

inline _LIBCPP_CONSTEXPR __bitset<0, 0>::__bitset() _NOEXCEPT {}

inline _LIBCPP_CONSTEXPR __bitset<0, 0>::__bitset(unsigned long long) _NOEXCEPT {}

template <size_t _Size>

class _LIBCPP_TEMPLATE_VIS bitset;

template <size_t _Size>

struct hash<bitset<_Size> >;

template <size_t _Size>

class _LIBCPP_TEMPLATE_VIS bitset

    : private __bitset<_Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1, _Size> {

public:

  static const unsigned __n_words = _Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1;

  typedef __bitset<__n_words, _Size> base;

public:

  typedef typename base::reference reference;

  typedef typename base::const_reference const_reference;

  // 23.3.5.1 constructors:

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bitset() _NOEXCEPT {}

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bitset(unsigned long long __v) _NOEXCEPT : base(__v) {}

  template <class _CharT, class = __enable_if_t<_IsCharLikeType<_CharT>::value> >

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 explicit bitset(

      const _CharT* __str,

#if _LIBCPP_STD_VER >= 26

      typename basic_string_view<_CharT>::size_type __n = basic_string_view<_CharT>::npos,

#else

      typename basic_string<_CharT>::size_type __n = basic_string<_CharT>::npos,

#endif

      _CharT __zero = _CharT('0'),

      _CharT __one  = _CharT('1')) {

    size_t __rlen = std::min(__n, char_traits<_CharT>::length(__str));

    __init_from_string_view(basic_string_view<_CharT>(__str, __rlen), __zero, __one);

  }

#if _LIBCPP_STD_VER >= 26

  template <class _CharT, class _Traits>

  _LIBCPP_HIDE_FROM_ABI constexpr explicit bitset(

      basic_string_view<_CharT, _Traits> __str,

      typename basic_string_view<_CharT, _Traits>::size_type __pos = 0,

      typename basic_string_view<_CharT, _Traits>::size_type __n   = basic_string_view<_CharT, _Traits>::npos,

      _CharT __zero                                                = _CharT('0'),

      _CharT __one                                                 = _CharT('1')) {

    if (__pos > __str.size())

      __throw_out_of_range("bitset string pos out of range");

    size_t __rlen = std::min(__n, __str.size() - __pos);

    __init_from_string_view(basic_string_view<_CharT, _Traits>(__str.data() + __pos, __rlen), __zero, __one);

  }

#endif

  template <class _CharT, class _Traits, class _Allocator>

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 explicit bitset(

      const basic_string<_CharT, _Traits, _Allocator>& __str,

      typename basic_string<_CharT, _Traits, _Allocator>::size_type __pos = 0,

      typename basic_string<_CharT, _Traits, _Allocator>::size_type __n =

          basic_string<_CharT, _Traits, _Allocator>::npos,

      _CharT __zero = _CharT('0'),

      _CharT __one  = _CharT('1')) {

    if (__pos > __str.size())

      std::__throw_out_of_range("bitset string pos out of range");

    size_t __rlen = std::min(__n, __str.size() - __pos);

    __init_from_string_view(basic_string_view<_CharT, _Traits>(__str.data() + __pos, __rlen), __zero, __one);

  }

  // 23.3.5.2 bitset operations:

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& operator&=(const bitset& __rhs) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& operator|=(const bitset& __rhs) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& operator^=(const bitset& __rhs) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& operator<<=(size_t __pos) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& operator>>=(size_t __pos) _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& set() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& set(size_t __pos, bool __val = true);

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& reset() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& reset(size_t __pos);

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset operator~() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& flip() _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset& flip(size_t __pos);

  // element access:

#ifdef _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool operator[](size_t __p) const { return base::__make_ref(__p); }

#else

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const_reference operator[](size_t __p) const { return base::__make_ref(__p); }

#endif

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 reference operator[](size_t __p) { return base::__make_ref(__p); }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const;

  template <class _CharT, class _Traits, class _Allocator>

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, _Traits, _Allocator>

  to_string(_CharT __zero = _CharT('0'), _CharT __one = _CharT('1')) const;

  template <class _CharT, class _Traits>

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, _Traits, allocator<_CharT> >

  to_string(_CharT __zero = _CharT('0'), _CharT __one = _CharT('1')) const;

  template <class _CharT>

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, char_traits<_CharT>, allocator<_CharT> >

  to_string(_CharT __zero = _CharT('0'), _CharT __one = _CharT('1')) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<char, char_traits<char>, allocator<char> >

  to_string(char __zero = '0', char __one = '1') const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 size_t count() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR size_t size() const _NOEXCEPT { return _Size; }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool operator==(const bitset& __rhs) const _NOEXCEPT;

#if _LIBCPP_STD_VER <= 17

  _LIBCPP_HIDE_FROM_ABI bool operator!=(const bitset& __rhs) const _NOEXCEPT;

#endif

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool test(size_t __pos) const;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool none() const _NOEXCEPT { return !any(); }

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset operator<<(size_t __pos) const _NOEXCEPT;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset operator>>(size_t __pos) const _NOEXCEPT;

private:

  template <class _CharT, class _Traits>

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void

  __init_from_string_view(basic_string_view<_CharT, _Traits> __str, _CharT __zero, _CharT __one) {

    for (size_t __i = 0; __i < __str.size(); ++__i)

      if (!_Traits::eq(__str[__i], __zero) && !_Traits::eq(__str[__i], __one))

        std::__throw_invalid_argument("bitset string ctor has invalid argument");

    size_t __mp = std::min(__str.size(), _Size);

    size_t __i  = 0;

    for (; __i < __mp; ++__i) {

      _CharT __c   = __str[__mp - 1 - __i];

      (*this)[__i] = _Traits::eq(__c, __one);

    }

    std::fill(base::__make_iter(__i), base::__make_iter(_Size), false);

  }

  _LIBCPP_HIDE_FROM_ABI size_t __hash_code() const _NOEXCEPT { return base::__hash_code(); }

  friend struct hash<bitset>;

};

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>&

bitset<_Size>::operator&=(const bitset& __rhs) _NOEXCEPT {

  base::operator&=(__rhs);

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>&

bitset<_Size>::operator|=(const bitset& __rhs) _NOEXCEPT {

  base::operator|=(__rhs);

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>&

bitset<_Size>::operator^=(const bitset& __rhs) _NOEXCEPT {

  base::operator^=(__rhs);

  return *this;

}

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::operator<<=(size_t __pos) _NOEXCEPT {

  __pos = std::min(__pos, _Size);

  std::copy_backward(base::__make_iter(0), base::__make_iter(_Size - __pos), base::__make_iter(_Size));

  std::fill_n(base::__make_iter(0), __pos, false);

  return *this;

}

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::operator>>=(size_t __pos) _NOEXCEPT {

  __pos = std::min(__pos, _Size);

  std::copy(base::__make_iter(__pos), base::__make_iter(_Size), base::__make_iter(0));

  std::fill_n(base::__make_iter(_Size - __pos), __pos, false);

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::set() _NOEXCEPT {

  std::fill_n(base::__make_iter(0), _Size, true);

  return *this;

}

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::set(size_t __pos, bool __val) {

  if (__pos >= _Size)

    __throw_out_of_range("bitset set argument out of range");

  (*this)[__pos] = __val;

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::reset() _NOEXCEPT {

  std::fill_n(base::__make_iter(0), _Size, false);

  return *this;

}

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::reset(size_t __pos) {

  if (__pos >= _Size)

    __throw_out_of_range("bitset reset argument out of range");

  (*this)[__pos] = false;

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size> bitset<_Size>::operator~() const _NOEXCEPT {

  bitset __x(*this);

  __x.flip();

  return __x;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::flip() _NOEXCEPT {

  base::flip();

  return *this;

}

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>& bitset<_Size>::flip(size_t __pos) {

  if (__pos >= _Size)

    __throw_out_of_range("bitset flip argument out of range");

  reference __r = base::__make_ref(__pos);

  __r           = ~__r;

  return *this;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long bitset<_Size>::to_ulong() const {

  return base::to_ulong();

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long bitset<_Size>::to_ullong() const {

  return base::to_ullong();

}

template <size_t _Size>

template <class _CharT, class _Traits, class _Allocator>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, _Traits, _Allocator>

bitset<_Size>::to_string(_CharT __zero, _CharT __one) const {

  basic_string<_CharT, _Traits, _Allocator> __r(_Size, __zero);

  for (size_t __i = 0; __i != _Size; ++__i) {

    if ((*this)[__i])

      __r[_Size - 1 - __i] = __one;

  }

  return __r;

}

template <size_t _Size>

template <class _CharT, class _Traits>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, _Traits, allocator<_CharT> >

bitset<_Size>::to_string(_CharT __zero, _CharT __one) const {

  return to_string<_CharT, _Traits, allocator<_CharT> >(__zero, __one);

}

template <size_t _Size>

template <class _CharT>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<_CharT, char_traits<_CharT>, allocator<_CharT> >

bitset<_Size>::to_string(_CharT __zero, _CharT __one) const {

  return to_string<_CharT, char_traits<_CharT>, allocator<_CharT> >(__zero, __one);

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 basic_string<char, char_traits<char>, allocator<char> >

bitset<_Size>::to_string(char __zero, char __one) const {

  return to_string<char, char_traits<char>, allocator<char> >(__zero, __one);

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 size_t bitset<_Size>::count() const _NOEXCEPT {

  return static_cast<size_t>(std::count(base::__make_iter(0), base::__make_iter(_Size), true));

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool

bitset<_Size>::operator==(const bitset& __rhs) const _NOEXCEPT {

  return std::equal(base::__make_iter(0), base::__make_iter(_Size), __rhs.__make_iter(0));

}

#if _LIBCPP_STD_VER <= 17

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI bool bitset<_Size>::operator!=(const bitset& __rhs) const _NOEXCEPT {

  return !(*this == __rhs);

}

#endif

template <size_t _Size>

_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool bitset<_Size>::test(size_t __pos) const {

  if (__pos >= _Size)

    __throw_out_of_range("bitset test argument out of range");

  return (*this)[__pos];

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool bitset<_Size>::all() const _NOEXCEPT {

  return base::all();

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool bitset<_Size>::any() const _NOEXCEPT {

  return base::any();

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>

bitset<_Size>::operator<<(size_t __pos) const _NOEXCEPT {

  bitset __r = *this;

  __r <<= __pos;

  return __r;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>

bitset<_Size>::operator>>(size_t __pos) const _NOEXCEPT {

  bitset __r = *this;

  __r >>= __pos;

  return __r;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>

operator&(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT {

  bitset<_Size> __r = __x;

  __r &= __y;

  return __r;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>

operator|(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT {

  bitset<_Size> __r = __x;

  __r |= __y;

  return __r;

}

template <size_t _Size>

inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bitset<_Size>

operator^(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT {

  bitset<_Size> __r = __x;

  __r ^= __y;

  return __r;

}

template <size_t _Size>

struct _LIBCPP_TEMPLATE_VIS hash<bitset<_Size> > : public __unary_function<bitset<_Size>, size_t> {

  _LIBCPP_HIDE_FROM_ABI size_t operator()(const bitset<_Size>& __bs) const _NOEXCEPT { return __bs.__hash_code(); }

};

template <class _CharT, class _Traits, size_t _Size>

_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&

operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x);

template <class _CharT, class _Traits, size_t _Size>

_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&

operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Size>& __x);

_LIBCPP_END_NAMESPACE_STD

_LIBCPP_POP_MACROS

#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20

#  include <concepts>

#  include <cstdlib>

#  include <type_traits>

#endif

#endif // _LIBCPP_BITSET