23 Containers library [containers]

23.4 Associative containers [associative]

23.4.7 Class template multiset [multiset] multiset constructors [multiset.cons]

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

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

Complexity: Constant.

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

Requires: If the iterator's indirection operator returns an lvalue or a const rvalue, then Key shall be CopyInsertable into *this.

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

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