In C++, a multiset is a container that stores elements in a specific order. Multiple elements can have the same values. In this article, we will learn how to insert multiple elements into a multiset in C++.

Example:

Input:
myMultiset = {1, 4, 5, 9};
ElementsToBeAdded = {2, 3, 4}

Output:
myMultiset = {1, 2, 3, 4, 4, 5, 9}

Insert Multiple Elements to a Multiset in C++

To add multiple elements into a std::multiset in C++, you can use the std::multiset::insert() with iterators of the range from which you want to insert the elements.

Approach

1. Create a range of elements to insert, either using another container or using an initializer list.
2. Use the insert() function with the beginning and end iterators of the range to insert the elements into the multiset.

C++ Program to Insert Multiple Elements into a Multiset

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Time Complexity: O(M log N), where N is the size of the multiset and M is the number of new elements.
Space Complexity: O(M)