#include<iostream>

using namespace std;

class Matrix{
private:
    int n, m;
    int **a;
public:
    Matrix(int rows=2, int columns=2, int value=0){
        n = rows, m = columns;
        a = new int*[n];
        for (int i=0; i<n; i++){
            a[i] = new int[m];
            for (int j=0; j<m; j++) a[i][j] = value;
        }
    }
    void place(int row, int column, int val){
        a[row][column] = val;
    }
    int *get_all_as_array(){
        int *return_value = new int[n*m];
        for (int i=0; i<n; i++)
            for (int j=0; j<m; j++)
                return_value[m*i+j] = a[i][j];
        return return_value;
    }
    void print_content(){
        for (int i=0; i<n; i++){
            for (int j=0; j<m; j++)
                cout << a[i][j] << ' ';
            cout << endl;
        }
    }
    pair<int,int> get_dimensions(){
        return {n, m};
    }
};

int main(){
    Matrix m1 = Matrix(1, 10, 1), m2 = Matrix(2, 3, 12), m3 = Matrix();
    cout << "Matrices:\n";
    m1.print_content();
    cout << endl;
    m2.print_content();
    cout << endl;
    m3.print_content();
    int *arr1 = m1.get_all_as_array(), n1 = m1.get_dimensions().first * m1.get_dimensions().second;
    int *arr2 = m2.get_all_as_array(), n2 = m2.get_dimensions().first * m2.get_dimensions().second;
    int *arr3 = m3.get_all_as_array(), n3 = m3.get_dimensions().first * m3.get_dimensions().second;
    cout << "\nArrays:\n";
    for (int i=0; i<n1; i++){
        cout << arr1[i] << ' ';
    }
    cout << endl << endl;
    for (int i=0; i<n2; i++){
        cout << arr2[i] << ' ';
    }
    cout << endl << endl;
    for (int i=0; i<n3; i++){
        cout << arr3[i] << ' ';
    }
    cout << endl << endl;
    m2.place(1, 2, -5);
    cout << "Matrix2 after placing (-5) in position (1, 2):\n";
    m2.print_content();
    return 0;
}