1. (2023高三下·浙江开学考) 对于如下两个 Python 程序段，下列说法错误的是（   ）

程序a	程序b
a = 2 res = 1 n = int(input()) for i in range(n):     res = res * a print(res)	def powr(a, n):     if n == 1:         return a     elif n == 0:         return 1     else:         tmp = powr(a, n // 2)         return tmp * tmp a = 2 n = int(input()) print(powr(a, n))