How to Create a Set of Arrays in C++?

// C++ program to Create a Set of Arrays
#include <array>
#include <iostream>
#include <set>
using namespace std;

// Driver Code
int main()
{
    // Declare a set containing arrays of 3 integers
    set<array<int, 3> > mySet;

    array<int, 3> array1 = { 1, 2, 3 };
    array<int, 3> array2 = { 4, 5, 6 };
    array<int, 3> array3 = { 1, 2, 3 };

    // Insert arrays into the set
    mySet.insert(array1);
    mySet.insert(array2);
    mySet.insert(array3);

    // Iterate over the set
    for (auto& arr : mySet) {
        // Iterate over each element of the array
        for (auto& element : arr) {
            // Output each element followed by a space
            cout << element << ' ';
        }

        // Output a newline after each array
        cout << endl;
    }
}