#include <iostream>
#include <vector>
#include <algorithm>

std::vector<std::vector<int>> getSmallestMatrix(const std::vector<std::vector<int>>& matrix, const std::vector<int>& extraNums) {
    std::vector<int> combined;

    // Flatten the 3x3 matrix into a 1D vector
    for (const auto& row : matrix) {
        for (int num : row) {
            combined.push_back(num);
        }
    }

    // Add extra numbers to the list
    combined.insert(combined.end(), extraNums.begin(), extraNums.end());

    // Sort the combined numbers
    std::sort(combined.begin(), combined.end());

    // Take the smallest 9 elements and form a new 3x3 matrix
    std::vector<std::vector<int>> newMatrix(3, std::vector<int>(3));
    for (int i = 0; i < 3; i++)
        for (int j = …