Standard library header <flat_set> (C++23)

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이 헤더는 containers 라이브러리의 일부입니다.

#include <compare>
#include <initializer_list>
namespace std {
  // 클래스 템플릿 flat_set
  template<class Key, class Compare = less<Key>, class KeyContainer = vector<Key>>
  class flat_set;
  struct sorted_unique_t
  {
    explicit sorted_unique_t() = default;
  };
  inline constexpr sorted_unique_t sorted_unique{};
  template<class Key, class Compare, class KeyContainer, class Allocator>
  struct uses_allocator<flat_set<Key, Compare, KeyContainer>, Allocator>;
  // flat_set을 위한 삭제 함수
  template<class Key, class Compare, class KeyContainer, class Predicate>
  typename flat_set<Key, Compare, KeyContainer>::size_type erase_if(
    flat_set<Key, Compare, KeyContainer>& c,
    Predicate pred);
  // 클래스 템플릿 flat_multiset
  template<class Key, class Compare = less<Key>, class KeyContainer = vector<Key>>
  class flat_multiset;
  struct sorted_equivalent_t
  {
    explicit sorted_equivalent_t() = default;
  };
  inline constexpr sorted_equivalent_t sorted_equivalent{};
  template<class Key, class Compare, class KeyContainer, class Allocator>
  struct uses_allocator<flat_multiset<Key, Compare, KeyContainer>, Allocator>;
  // flat_multiset을 위한 삭제 함수
  template<class Key, class Compare, class KeyContainer, class Predicate>
  typename flat_multiset<Key, Compare, KeyContainer>::size_type erase_if(
    flat_multiset<Key, Compare, KeyContainer>& c,
    Predicate pred);
}

클래스 템플릿 std:: flat_set

namespace std {
  template<class Key, class Compare = less<Key>, class KeyContainer = vector<Key>>
  class flat_set
  {
  public:
    // types
    using key_type               = Key;
    using value_type             = Key;
    using key_compare            = Compare;
    using value_compare          = Compare;
    using reference              = value_type&;
    using const_reference        = const value_type&;
    using size_type              = typename KeyContainer::size_type;
    using difference_type        = typename KeyContainer::difference_type;
    using iterator               = /* 구현 정의 */;
    using const_iterator         = /* 구현 정의 */;
    using reverse_iterator       = std::reverse_iterator<iterator>;
    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
    using container_type         = KeyContainer;
    // 생성자
    flat_set()
      : flat_set(key_compare())
    {
    }
    explicit flat_set(const key_compare& comp)
      : /*c*/()
      , /*비교*/(comp)
    {
    }
    explicit flat_set(container_type cont, const key_compare& comp = key_compare());
    flat_set(sorted_unique_t,
             container_type cont,
             const key_compare& comp = key_compare())
      : /*c*/(std::move(cont))
      , /*비교*/(comp)
    {
    }
    template<class InputIter>
    flat_set(InputIter first, InputIter last, const key_compare& comp = key_compare())
      : /*c*/()
      , /*비교*/(comp)
    {
      insert(first, last);
    }
    template<class InputIter>
    flat_set(sorted_unique_t,
             InputIter first,
             InputIter last,
             const key_compare& comp = key_compare())
      : /*c*/(first, last)
      , /*비교*/(comp)
    {
    }
    template<container-compatible-range<value_type> R>
    flat_set(from_range_t fr, R&& rg)
      : flat_set(fr, std::forward<R>(rg), key_compare())
    {
    }
    template<container-compatible-range<value_type> R>
    flat_set(from_range_t, R&& rg, const key_compare& comp)
      : flat_set(comp)
    {
      insert_range(std::forward<R>(rg));
    }
    flat_set(initializer_list<value_type> il, const key_compare& comp = key_compare())
      : flat_set(il.begin(), il.end(), comp)
    {
    }
    flat_set(sorted_unique_t s,
             initializer_list<value_type> il,
             const key_compare& comp = key_compare())
      : flat_set(s, il.begin(), il.end(), comp)
    {
    }
    // 할당자를 사용하는 생성자
    template<class Alloc>
    explicit flat_set(const Alloc& a);
    template<class Alloc>
    flat_set(const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_set(const container_type& cont, const Alloc& a);
    template<class Alloc>
    flat_set(const container_type& cont, const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_set(sorted_unique_t, const container_type& cont, const Alloc& a);
    template<class Alloc>
    flat_set(sorted_unique_t,
             const container_type& cont,
             const key_compare& comp,
             const Alloc& a);
    template<class Alloc>
    flat_set(const flat_set&, const Alloc& a);
    template<class Alloc>
    flat_set(flat_set&&, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_set(InputIter first, InputIter last, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_set(InputIter first, InputIter last, const key_compare& comp, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_set(sorted_unique_t, InputIter first, InputIter last, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_set(sorted_unique_t,
             InputIter first,
             InputIter last,
             const key_compare& comp,
             const Alloc& a);
    template<container-compatible-range<value_type> R, class Alloc>
    flat_set(from_range_t, R&& rg, const Alloc& a);
    template<container-compatible-range<value_type> R, class Alloc>
    flat_set(from_range_t, R&& rg, const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_set(initializer_list<value_type> il, const Alloc& a);
    template<class Alloc>
    flat_set(initializer_list<value_type> il, const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_set(sorted_unique_t, initializer_list<value_type> il, const Alloc& a);
    template<class Alloc>
    flat_set(sorted_unique_t,
             initializer_list<value_type> il,
             const key_compare& comp,
             const Alloc& a);
    flat_set& operator=(initializer_list<value_type>);
    // iterators
    iterator begin() noexcept;
    const_iterator begin() const noexcept;
    iterator end() noexcept;
    const_iterator end() const noexcept;
    reverse_iterator rbegin() noexcept;
    const_reverse_iterator rbegin() const noexcept;
    reverse_iterator rend() noexcept;
    const_reverse_iterator rend() const noexcept;
    const_iterator cbegin() const noexcept;
    const_iterator cend() const noexcept;
    const_reverse_iterator crbegin() const noexcept;
    const_reverse_iterator crend() const noexcept;
    // capacity
    [[nodiscard]] bool empty() const noexcept;
    size_type size() const noexcept;
    size_type max_size() const noexcept;
    // 수정자
    template<class... Args>
    pair<iterator, bool> emplace(Args&&... args);
    template<class... Args>
    iterator emplace_hint(const_iterator position, Args&&... args);
    pair<iterator, bool> insert(const value_type& x) { return emplace(x); }
    pair<iterator, bool> insert(value_type&& x) { return emplace(std::move(x)); }
    template<class K>
    pair<iterator, bool> insert(K&& x);
    iterator insert(const_iterator position, const value_type& x)
    {
      return emplace_hint(position, x);
    }
    iterator insert(const_iterator position, value_type&& x)
    {
      return emplace_hint(position, std::move(x));
    }
    template<class K>
    iterator insert(const_iterator hint, K&& x);
    template<class InputIter>
    void insert(InputIter first, InputIter last);
    template<class InputIter>
    void insert(sorted_unique_t, InputIter first, InputIter last);
    template<container-compatible-range<value_type> R>
    void insert_range(R&& rg);
    void insert(initializer_list<value_type> il) { insert(il.begin(), il.end()); }
    void insert(sorted_unique_t s, initializer_list<value_type> il)
    {
      insert(s, il.begin(), il.end());
    }
    container_type extract() &&;
    void replace(container_type&&);
    iterator erase(iterator position);
    iterator erase(const_iterator position);
    size_type erase(const key_type& x);
    template<class K>
    size_type erase(K&& x);
    iterator erase(const_iterator first, const_iterator last);
    void swap(flat_set& y) noexcept;
    void clear() noexcept;
    // observers
    key_compare key_comp() const;
    value_compare value_comp() const;
    // 집합 연산
    iterator find(const key_type& x);
    const_iterator find(const key_type& x) const;
    template<class K>
    iterator find(const K& x);
    template<class K>
    const_iterator find(const K& x) const;
    size_type count(const key_type& x) const;
    template<class K>
    size_type count(const K& x) const;
    bool contains(const key_type& x) const;
    template<class K>
    bool contains(const K& x) const;
    iterator lower_bound(const key_type& x);
    const_iterator lower_bound(const key_type& x) const;
    template<class K>
    iterator lower_bound(const K& x);
    template<class K>
    const_iterator lower_bound(const K& x) const;
    iterator upper_bound(const key_type& x);
    const_iterator upper_bound(const key_type& x) const;
    template<class K>
    iterator upper_bound(const K& x);
    template<class K>
    const_iterator upper_bound(const K& x) const;
    pair<iterator, iterator> equal_range(const key_type& x);
    pair<const_iterator, const_iterator> equal_range(const key_type& x) const;
    template<class K>
    pair<iterator, iterator> equal_range(const K& x);
    template<class K>
    pair<const_iterator, const_iterator> equal_range(const K& x) const;
    friend bool operator==(const flat_set& x, const flat_set& y);
    friend /*synth-three-way-result*/<value_type> operator<=>(const flat_set& x,
                                                              const flat_set& y);
    friend void swap(flat_set& x, flat_set& y) noexcept { x.swap(y); }
  private:
    container_type /*c*/;    // 설명 전용
    key_compare /*비교*/; // 설명 전용
  };
  template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
  flat_set(KeyContainer, Compare = Compare())
    -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Allocator>
  flat_set(KeyContainer, Allocator) -> flat_set<typename KeyContainer::value_type,
                                                less<typename KeyContainer::value_type>,
                                                KeyContainer>;
  template<class KeyContainer, class Compare, class Allocator>
  flat_set(KeyContainer, Compare, Allocator)
    -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
  flat_set(sorted_unique_t, KeyContainer, Compare = Compare())
    -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Allocator>
  flat_set(sorted_unique_t, KeyContainer, Allocator)
    -> flat_set<typename KeyContainer::value_type,
                less<typename KeyContainer::value_type>,
                KeyContainer>;
  template<class KeyContainer, class Compare, class Allocator>
  flat_set(sorted_unique_t, KeyContainer, Compare, Allocator)
    -> flat_set<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class InputIter, class Compare = less</*iter-value-type*/<InputIter>>>
  flat_set(InputIter, InputIter, Compare = Compare())
    -> flat_set</*iter-value-type*/<InputIter>, Compare>;
  template<class InputIter, class Compare = less</*iter-value-type*/<InputIter>>>
  flat_set(sorted_unique_t, InputIter, InputIter, Compare = Compare())
    -> flat_set</*iter-value-type*/<InputIter>, Compare>;
  template<ranges::input_range R,
           class Compare   = less<ranges::range_value_t<R>>,
           class Allocator = allocator<ranges::range_value_t<R>>>
  flat_set(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
    -> flat_set<ranges::range_value_t<R>,
                Compare,
                vector<ranges::range_value_t<R>,
                       /*alloc-rebind*/<Allocator, ranges::range_value_t<R>>>>;
  template<ranges::input_range R, class Allocator>
  flat_set(from_range_t, R&&, Allocator)
    -> flat_set<ranges::range_value_t<R>,
                less<ranges::range_value_t<R>>,
                vector<ranges::range_value_t<R>,
                       /*alloc-rebind*/<Allocator, ranges::range_value_t<R>>>>;
  template<class Key, class Compare = less<Key>>
  flat_set(initializer_list<Key>, Compare = Compare()) -> flat_set<Key, Compare>;
  template<class Key, class Compare = less<Key>>
  flat_set(sorted_unique_t, initializer_list<Key>, Compare = Compare())
    -> flat_set<Key, Compare>;
  template<class Key, class Compare, class KeyContainer, class Allocator>
  struct uses_allocator<flat_set<Key, Compare, KeyContainer>, Allocator>
    : bool_constant<uses_allocator_v<KeyContainer, Allocator>>
  {};
}

클래스 템플릿 std:: flat_multiset

namespace std {
  template<class Key, class Compare = less<Key>, class KeyContainer = vector<Key>>
  class flat_multiset
  {
  public:
    // 타입
    using key_type               = Key;
    using value_type             = Key;
    using key_compare            = Compare;
    using value_compare          = Compare;
    using reference              = value_type&;
    using const_reference        = const value_type&;
    using size_type              = typename KeyContainer::size_type;
    using difference_type        = typename KeyContainer::difference_type;
    using iterator               = /* 구현 정의 */;
    using const_iterator         = /* 구현 정의 */;
    using reverse_iterator       = std::reverse_iterator<iterator>;
    using const_reverse_iterator = std::reverse_iterator<const_iterator>;
    using container_type         = KeyContainer;
    // 생성자
    flat_multiset()
      : flat_multiset(key_compare())
    {
    }
    explicit flat_multiset(const key_compare& comp)
      : /*c*/()
      , /*비교*/(comp)
    {
    }
    explicit flat_multiset(container_type cont, const key_compare& comp = key_compare());
    flat_multiset(sorted_equivalent_t,
                  container_type cont,
                  const key_compare& comp = key_compare())
      : /*c*/(std::move(cont))
      , /*비교*/(comp)
    {
    }
    template<class InputIter>
    flat_multiset(InputIter first,
                  InputIter last,
                  const key_compare& comp = key_compare())
      : /*c*/()
      , /*비교*/(comp)
    {
      insert(first, last);
    }
    template<class InputIter>
    flat_multiset(sorted_equivalent_t,
                  InputIter first,
                  InputIter last,
                  const key_compare& comp = key_compare())
      : /*c*/(first, last)
      , /*비교*/(comp)
    {
    }
    template<container-compatible-range<value_type> R>
    flat_multiset(from_range_t fr, R&& rg)
      : flat_multiset(fr, std::forward<R>(rg), key_compare())
    {
    }
    template<container-compatible-range<value_type> R>
    flat_multiset(from_range_t, R&& rg, const key_compare& comp)
      : flat_multiset(comp)
    {
      insert_range(std::forward<R>(rg));
    }
    flat_multiset(initializer_list<value_type> il,
                  const key_compare& comp = key_compare())
      : flat_multiset(il.begin(), il.end(), comp)
    {
    }
    flat_multiset(sorted_equivalent_t s,
                  initializer_list<value_type> il,
                  const key_compare& comp = key_compare())
      : flat_multiset(s, il.begin(), il.end(), comp)
    {
    }
    // 할당자를 사용하는 생성자
    template<class Alloc>
    explicit flat_multiset(const Alloc& a);
    template<class Alloc>
    flat_multiset(const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_multiset(const container_type& cont, const Alloc& a);
    template<class Alloc>
    flat_multiset(const container_type& cont, const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_multiset(sorted_equivalent_t, const container_type& cont, const Alloc& a);
    template<class Alloc>
    flat_multiset(sorted_equivalent_t,
                  const container_type& cont,
                  const key_compare& comp,
                  const Alloc& a);
    template<class Alloc>
    flat_multiset(const flat_multiset&, const Alloc& a);
    template<class Alloc>
    flat_multiset(flat_multiset&&, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_multiset(InputIter first, InputIter last, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_multiset(InputIter first,
                  InputIter last,
                  const key_compare& comp,
                  const Alloc& a);
    template<class InputIter, class Alloc>
    flat_multiset(sorted_equivalent_t, InputIter first, InputIter last, const Alloc& a);
    template<class InputIter, class Alloc>
    flat_multiset(sorted_equivalent_t,
                  InputIter first,
                  InputIter last,
                  const key_compare& comp,
                  const Alloc& a);
    template<container-compatible-range<value_type> R, class Alloc>
    flat_multiset(from_range_t, R&& rg, const Alloc& a);
    template<container-compatible-range<value_type> R, class Alloc>
    flat_multiset(from_range_t, R&& rg, const key_compare& comp, const Alloc& a);
    template<class Alloc>
    flat_multiset(initializer_list<value_type> il, const Alloc& a);
    template<class Alloc>
    flat_multiset(initializer_list<value_type> il,
                  const key_compare& comp,
                  const Alloc& a);
    template<class Alloc>
    flat_multiset(sorted_equivalent_t, initializer_list<value_type> il, const Alloc& a);
    template<class Alloc>
    flat_multiset(sorted_equivalent_t,
                  initializer_list<value_type> il,
                  const key_compare& comp,
                  const Alloc& a);
    flat_multiset& operator=(initializer_list<value_type>);
    // 반복자
    iterator begin() noexcept;
    const_iterator begin() const noexcept;
    iterator end() noexcept;
    const_iterator end() const noexcept;
    reverse_iterator rbegin() noexcept;
    const_reverse_iterator rbegin() const noexcept;
    reverse_iterator rend() noexcept;
    const_reverse_iterator rend() const noexcept;
    const_iterator cbegin() const noexcept;
    const_iterator cend() const noexcept;
    const_reverse_iterator crbegin() const noexcept;
    const_reverse_iterator crend() const noexcept;
    // capacity
    [[nodiscard]] bool empty() const noexcept;
    size_type size() const noexcept;
    size_type max_size() const noexcept;
    // modifiers
    template<class... Args>
    iterator emplace(Args&&... args);
    template<class... Args>
    iterator emplace_hint(const_iterator position, Args&&... args);
    iterator insert(const value_type& x) { return emplace(x); }
    iterator insert(value_type&& x) { return emplace(std::move(x)); }
    iterator insert(const_iterator position, const value_type& x)
    {
      return emplace_hint(position, x);
    }
    iterator insert(const_iterator position, value_type&& x)
    {
      return emplace_hint(position, std::move(x));
    }
    template<class InputIter>
    void insert(InputIter first, InputIter last);
    template<class InputIter>
    void insert(sorted_equivalent_t, InputIter first, InputIter last);
    template<container-compatible-range<value_type> R>
    void insert_range(R&& rg);
    void insert(initializer_list<value_type> il) { insert(il.begin(), il.end()); }
    void insert(sorted_equivalent_t s, initializer_list<value_type> il)
    {
      insert(s, il.begin(), il.end());
    }
    container_type extract() &&;
    void replace(container_type&&);
    iterator erase(iterator position);
    iterator erase(const_iterator position);
    size_type erase(const key_type& x);
    template<class K>
    size_type erase(K&& x);
    iterator erase(const_iterator first, const_iterator last);
    void swap(flat_multiset& y) noexcept;
    void clear() noexcept;
    // observers
    key_compare key_comp() const;
    value_compare value_comp() const;
    // 집합 연산
    iterator find(const key_type& x);
    const_iterator find(const key_type& x) const;
    template<class K>
    iterator find(const K& x);
    template<class K>
    const_iterator find(const K& x) const;
    size_type count(const key_type& x) const;
    template<class K>
    size_type count(const K& x) const;
    bool contains(const key_type& x) const;
    template<class K>
    bool contains(const K& x) const;
    iterator lower_bound(const key_type& x);
    const_iterator lower_bound(const key_type& x) const;
    template<class K>
    iterator lower_bound(const K& x);
    template<class K>
    const_iterator lower_bound(const K& x) const;
    iterator upper_bound(const key_type& x);
    const_iterator upper_bound(const key_type& x) const;
    template<class K>
    iterator upper_bound(const K& x);
    template<class K>
    const_iterator upper_bound(const K& x) const;
    pair<iterator, iterator> equal_range(const key_type& x);
    pair<const_iterator, const_iterator> equal_range(const key_type& x) const;
    template<class K>
    pair<iterator, iterator> equal_range(const K& x);
    template<class K>
    pair<const_iterator, const_iterator> equal_range(const K& x) const;
    friend bool operator==(const flat_multiset& x, const flat_multiset& y);
    friend /*synth-three-way-result*/<value_type> operator<=>(const flat_multiset& x,
                                                              const flat_multiset& y);
    friend void swap(flat_multiset& x, flat_multiset& y) noexcept { x.swap(y); }
  private:
    container_type /*c*/;    // 설명 전용
    key_compare /*비교*/; // 설명 전용
  };
  template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
  flat_multiset(KeyContainer, Compare = Compare())
    -> flat_multiset<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Allocator>
  flat_multiset(KeyContainer, Allocator)
    -> flat_multiset<typename KeyContainer::value_type,
                     less<typename KeyContainer::value_type>,
                     KeyContainer>;
  template<class KeyContainer, class Compare, class Allocator>
  flat_multiset(KeyContainer, Compare, Allocator)
    -> flat_multiset<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Compare = less<typename KeyContainer::value_type>>
  flat_multiset(sorted_equivalent_t, KeyContainer, Compare = Compare())
    -> flat_multiset<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class KeyContainer, class Allocator>
  flat_multiset(sorted_equivalent_t, KeyContainer, Allocator)
    -> flat_multiset<typename KeyContainer::value_type,
                     less<typename KeyContainer::value_type>,
                     KeyContainer>;
  template<class KeyContainer, class Compare, class Allocator>
  flat_multiset(sorted_equivalent_t, KeyContainer, Compare, Allocator)
    -> flat_multiset<typename KeyContainer::value_type, Compare, KeyContainer>;
  template<class InputIter, class Compare = less</*iter-value-type*/<InputIter>>>
  flat_multiset(InputIter, InputIter, Compare = Compare())
    -> flat_multiset</*iter-value-type*/<InputIter>, Compare>;
  template<class InputIter, class Compare = less</*iter-value-type*/<InputIter>>>
  flat_multiset(sorted_equivalent_t, InputIter, InputIter, Compare = Compare())
    -> flat_multiset</*iter-value-type*/<InputIter>, Compare>;
  template<ranges::input_range R,
           class Compare   = less<ranges::range_value_t<R>>,
           class Allocator = allocator<ranges::range_value_t<R>>>
  flat_multiset(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
    -> flat_multiset<ranges::range_value_t<R>,
                     Compare,
                     vector<ranges::range_value_t<R>,
                            /*alloc-rebind*/<Allocator, ranges::range_value_t<R>>>>;
  template<ranges::input_range R, class Allocator>
  flat_multiset(from_range_t, R&&, Allocator)
    -> flat_multiset<ranges::range_value_t<R>,
                     less<ranges::range_value_t<R>>,
                     vector<ranges::range_value_t<R>,
                            /*alloc-rebind*/<Allocator, ranges::range_value_t<R>>>>;
  template<class Key, class Compare = less<Key>>
  flat_multiset(initializer_list<Key>, Compare = Compare())
    -> flat_multiset<Key, Compare>;
  template<class Key, class Compare = less<Key>>
  flat_multiset(sorted_equivalent_t, initializer_list<Key>, Compare = Compare())
    -> flat_multiset<Key, Compare>;
  template<class Key, class Compare, class KeyContainer, class Allocator>
  struct uses_allocator<flat_multiset<Key, Compare, KeyContainer>, Allocator>
    : bool_constant<uses_allocator_v<KeyContainer, Allocator>>
  {};
}

참고문헌

C++23 표준 (ISO/IEC 14882:2024):

24.6.5 헤더 <flat_set> 개요 [flat.set.syn]

24.6.11.2 정의 [flat.set.defn]

24.6.12.2 정의 [flat.multiset.defn]

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Standard library header <flat_set> (C++23)

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포함 파일

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시놉시스

클래스 템플릿 std:: flat_set

클래스 템플릿 std:: flat_multiset

참고문헌