1. (2019高三上·浙江月考) 某对分查找算法的VB程序段如下：

Key = Int(Rnd * 49) * 2 + 1

s = 0: i = 1: j = 10

Do While i <= j

m = (i + j) \ 2

If Key = a(m) Then Exit Do If Key < a(m) Then

j = m - 1: s = 2 * s

Else

i = m + 1: s = 2 * s + 1

End If Loop

数组a(1)到a(10)的值依次为“2,6,7,15,20,24,27,43,52,63”，执行该程序段后，s的值不可能为（  ）