import random
a=[4,2,6,5,4,2,9,7]
k=random.randint(1,10)
i=0;j=len(a)-1;x=""
while i<=j:
m=(i+j)//2
if k<=a[m]:
j=m-1;x=x+"L"
else:
i=m+1;x=x+"R"
print(x)
执行该程序段后,输出的结果不可能出现的是 ( )
s = input('请输入一串小写字母') head = 0; tail = 0; top = -1 s1 = [""]*((len(s)+1)//2)
s2 = [""]*(len(s)//2)
for i in range(len(s)):
if i % 2 == 0:
s1[tail] = s[i]
tail += 1
else:
top += 1
s2[top] = s[i] x = ""
while head < tail and top > -1:
x = s1[head] + x
head += 1
x = x + s2[top]
top -= 1 print(x)
执行该程序段,输入字符串“abcdefg”,则输出的结果是( )