int** Matrix(const int rows){
        int **matrix = new int*[rows];
        for (int i = 0; i < rows; i++)
        {
            matrix[i]= new int[rows];
        }

        for (int i = 0; i < rows; i++){
                for (int j = 0; j < rows; j++)
                        matrix[i][j] = 0;
        }
        int count = rows-1;
        for (int i = 0; i < rows; i++, count--)
        {
                matrix[i][0] = matrix[i][count] = matrix[i][rows-1] = 1;
        }
        return matrix;
}