2007a_a2que1

    public int maxRow()
    {
        return maxRow(0, 0);
    }

    private int maxRow(int row, int maxRow)
    {
        if(row == _mat.length)
            return maxRow;
        int newMax = sumOfRow(row, 0) > sumOfRow(maxRow, 0) ? row : maxRow;
        return maxRow(row + 1, newMax);
    }

    private int sumOfRow(int row, int col)
    {
        if(col == _mat[0].length)
            return 0;
        return _mat[row][col] + sumOfRow(row, col + 1);
    }