Arr2D* createArr2D(size_t nr, size_t nc, int e) { //1
    int** tab = new int *[nr];
    Arr2D* test = new Arr2D{ nr, nc, *tab };
    for (int i = 0; i < nr;i++) {
        tab[i] = new int[nc];
        for (int j = 0;j < nc;j++)
            tab[i][j] = e;
    }
    return test;
}