easy task cpp

#include <iostream>
#include <string>

using namespace std;

int main()
{
    using size_type = std::size_t;
    using value_type = int;

    const size_type n1 = 3, n2 = 3;
    value_type m1[n1][n2], m2[n1][n2];

    // 1
    for (int i = 0; i < n1; ++i)
    {
        for (int j = 0; j < n2; ++j)
        {
            int inp; cin >> inp;
            m1[i][j] = inp;
            m2[(n1 - 1) - i][(n2 - 1) - j] = inp;
        }
    }
    cout << endl;

    // 2
    cout << "Mat 1: " << endl;
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cout << m1[i][j] << " ";
        cout << endl;
    }
    cout << endl;
    cout << "Mat 2: " << endl;
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cout << m2[i][j] << " ";
        cout << endl;
    }
    cout << endl;

    // 3
    value_type sums[n1][n2];
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            sums[i][j] = m1[i][j] + m2[i][j];
    }
    value_type prods[n1][n2];
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
        {
            int mini_sum = 0;
            for (int k = 0; k < n1; ++k)
            {
                mini_sum += m1[i][k] * m2[k][j];
            }
            prods[i][j] = mini_sum;
        }
    }

    cout << "Sums: " << endl;
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cout << sums[i][j] << " ";
        cout << endl;
    }
    cout << endl;
    cout << "Prods: " << endl;
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cout << prods[i][j] << " ";
        cout << endl;
    }
    cout << endl;
}