6.9

https://leetcode-cn.com/problems/ba-shu-zi-fan-yi-cheng-zi-fu-chuan-lcof/

每日一题：递归

class Solution:
    def translateNum(self, num):
        if 0 <= num <= 9: return 1
        a = num % 100
        if 10 <= a and a<=25:
            return self.translateNum(num//100) + self.translateNum(num//10)
        else:
            return self.translateNum(num//10)