#include <iostream>
using namespace std;
#include <cstdio>

class Matrix
{
    public:
        const int rows;
        const int columns;
        int** matrix;
        Matrix(int x,int y): rows{x} , columns{y}{
        
        
        matrix = new int* [rows];
        for(int i =0; i <rows; i++)
            {
                matrix[i] = new int [columns];
            }
        }

        void fillmatrix();

        ~Matrix()
        {
                for (int i = 0; i < rows; i++)
                {
                        delete[] matrix[i];
                }
                delete[] matrix;
        }


    
    
};
void Matrix::fillmatrix()
{
        int k = 0;
        for (int i = 0; i < rows; i++)
        {
                for (int j = 0; j < columns; j++)
                {
                        matrix[i][j]=k++;
                }
       
        }
 
}
void printmatrix(Matrix* mat)
{
    for (int i = 0; i < mat ->rows; i++)
        {
                for (int j = 0; j < mat -> columns; j++)
                {
                        cout << mat->matrix[i][j] << " ";
                }
            cout << endl;
        }

}
 


int main(){
    cout << "prosze podac liczbe wierszy oraz kolumn";
    int rows{0},columns{0};
    cin >> rows >> columns;
    Matrix* a = new Matrix{rows,columns};
    Matrix dwa{rows,columns};
    //dwa.fillmatrix();
    //printmatrix(&dwa);
    
    a->fillmatrix();
    printmatrix(a);
    delete a;
    //delete *dwa;

    return 0;
}