Counting ones

#include <iostream>
#include <sstream>
#include <vector>
#include <array>

using namespace std;

bool isPairChecked(array<long long, 2> pair, std::vector<array<long long, 2>> &results)
{
    for (const auto &storedPair : results)
    {
        if ((storedPair[0] == pair[0] && storedPair[1] == pair[1]) ||
            (storedPair[0] == pair[1] && storedPair[1] == pair[0]))
        {
            return true;
        }
    }
    return false;
}

void printPairs(const std::vector<array<long long, 2>> &results)
{
    for (const auto &pair : results)
    {
        cout << pair[0] << " " << pair[1] << endl;
    }
}

int main(int argc, char const *argv[])
{
    int n, max = 0;
    string input;
    std::vector<array<long long, 2>> results;

    // input n and the
    cin >> n;
    cin.ignore();
    getline(cin, input);

    long long numbers[n];

    // assign numbers to the numbers arrays
    istringstream stream(input);
    long long number;
    int index = 0;
    while (stream >> number && index < n)
    {
        numbers[index++] = number;
    }

    // verifying the product
   // std::vector<int[2]> resultsMemory;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            int x = __builtin_popcountll(static_cast<unsigned long long>(numbers[i] * numbers[j]));
            array<long long, 2> pair = {numbers[i], numbers[j]};

            if (x > max)
            {
                results.clear();
                max = x;
            }

            if (x == max)
            {
                if (!isPairChecked(pair, results))
                {
                    results.push_back(pair);
                }
            }
        }
    }
    cout << max << endl;
    printPairs(results);

    return 0;
}

/* std::cout << n << " ";
cout << numbers[17658]; */

// soit je cree un vector des couples déjà visités
// soit je verifie avec le vecteur déjà crée

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED