26 Containers library [containers]

26.4 Associative containers [associative]

26.4.7 Class template multiset [multiset]

26.4.7.2 multiset constructors [multiset.cons]

explicit multiset(const Compare& comp, const Allocator& = Allocator());

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Effects: Constructs an empty multiset using the specified comparison object and allocator.

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Complexity: Constant.

template <class InputIterator> multiset(InputIterator first, InputIterator last, const Compare& comp = Compare(), const Allocator& = Allocator());

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Effects: Constructs an empty multiset using the specified comparison object and allocator, and inserts elements from the range [first, last).

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Complexity: Linear in N if the range [first, last) is already sorted using comp and otherwise NlogN, where N is last - first.