Private Sub Command1_Click()

  Dim a As intger, i As intger, s As String

  n = Val(Text1.Text)

  s = ""

  For i = 1 To 2 * n - 1

    If i > n Then          ①          Else          ②            

  Next i

  text2.Text = s

End Sub

为实现以上功能，①②处分别填写（  ）

Dim n As Integer, i As Integer, left As Integer, right As Integer, m As Integer

Dim a(1 To 10) As String, t As String, key As String n = 6

a(1) = "35": a(2) = "20": a(3) = "18": a(4) = "8": a(5) = "274": a(6) = "47" For i = 1 To n - 1

For j = n To i + 1 Step -1

If a(i) < a(j) Then

t = a(i): a(i) = a(j): a(j) = t

End If

Next j

Next i

key = Text1.Text

left = 1: right = n

Do While left <= right

m = (left + right) \ 2

If a(m) = key Then Exit Do

If a(m) < key Then right = m - 1 Else left = m + 1

Loop

若在文本框 Text1 中输入“212”，则程序运行结束后，m 的值为（  ）