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set max_size() function in C++ STL

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  • Difficulty Level : Basic
  • Last Updated : 21 Jun, 2022

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

Syntax: 

set_name.max_size()

Parameters: This function does not accept any parameters.

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

Below program illustrates the above function:  

C++




// CPP program to demonstrate the
// set::max_size() function
#include <bits/stdc++.h>
using namespace std;
int main()
{
 
    set<int> s1, s2;
 
    s1.insert(1);
 
    // If set already contains elements
    cout << s1.max_size() << endl;
 
    // If set does not have elements
    cout << s2.max_size();
 
    return 0;
}

Output: 

461168601842738790
461168601842738790

 

Time Complexity: O(1)

Auxiliary Space: O(n)

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