#include <bits/stdc++.h>
using namespace std;

int main()
{
    int c1, r1, c2, r2;

    cout << " Row Col num for A:" << endl;
    cin >> r1 >> c1;
    cout << "Row Col num for B:" << endl;
    cin >> r2 >> c2;

    int a[r1][c1], b[r2][c2], result[r1][c2];

    if (c1 == r2)
    {
        cout << "A[i][j]:" << endl;
        for (int i = 0; i < r1; ++i)
        {
            for (int j = 0; j < c1; ++j)
            {
                cin >> a[i][j];
            }
        }
        cout << "B[i][j]:" << endl;
        for (int i = 0; i < r2; ++i)
        {
            for (int j = 0; j < c2; ++j)
            {
                cin >> b[i][j];
            }
        }

        for (int i = 0; i < r1; i++)
        {
            for (int j = 0; j < c2; j++)
            {
                result[i][j] = 0;
                for (int k = 0; k < r2; k++)
                {
                    result[i][j] += a[i][k] * b[k][j];
                }
            }
        }
        cout << "Product of matrices\n";
        for (int i = 0; i < r1; i++)
        {
            for (int j = 0; j < c2; j++)
                cout << result[i][j] << "  ";
            cout << "\n";
        }
    }

    return 0;
}