multimap maxsize() in C++ STL

The multimap::max_size() is a built-in function in C++ STL which returns the maximum number of elements a multimap container can hold.

Syntax:

multimap_name.max_size()

Parameters: This function does not accept any parameters.

Return Value: This function returns the maximum number of elements a list container can hold.

C++

// C++ program to illustrate
// multimap::max_size()
#include <bits/stdc++.h>
using namespace std;

int main()
{

    // initialize container
    multimap<int, int> mp1, mp2;

    cout << "The max size of mp1 is " << mp1.max_size();
    cout << "\nThe max size of mp2 is " << mp2.max_size();
    return 0;
}

Output:

The max size of mp1 is 461168601842738790
The max size of mp2 is 461168601842738790

Time Complexity – Constant O(1)