How to Create a Stack of Multisets in C++?

In C++, a stack is a container adapter that operates in a LIFO (Last In First Out) element order and allows insertion and deletion from the end only. A multiset is a container that stores elements in an ordered manner and allows multiple instances of an element. In this article, we will learn how to create a stack of multisets in C++.

Example:

Input:
myMultiset1 = {1, 2, 2, 2};
myMultiset1 = {1, 1, 4, 5};

Output:
myStack: [ {1, 2, 2, 2};
 {1, 1, 4, 5}; ]

Stack of Multisets in C++

To create a stack of multisets in C++, we will pass the template parameter in the stack declaration as a multiset. This will create a stack where each element is a multiset in itself.

Syntax to Declare Stack of Multiset

stack <multiset <Type>> myStack;

C++ Program to Create a Stack of Multisets

{1, 1, 2, 2, }, {1, 2, 2, }, 

Time Complexity: O(N), where N is the number of multisets.
Auxiliary Space: O(N * M), where M is the average size of the multisets.