Which of the following containers in the Standard Template Library (STL) allows duplicate elements and keeps them in sorted order?
- std::vector
- std::set
- std::unordered_set
- std::multiset
The std::multiset container in the STL allows duplicate elements and keeps them in a sorted order based on their values. Unlike std::set, which ensures each element is unique, std::multiset allows storage of multiple instances of equivalent elements.
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