题解 | #把数字翻译成字符串#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 解码
# @param nums string字符串 数字串
# @return int整型
#
class Solution:
    def solve(self , nums: str) -> int:
        # write code 
        n = len(nums)
        dp = [0]*(n+1)
        dp[0] = 1
        for i in range(1,n+1):
            if nums[i-1] != '0':
                dp[i] += dp[i-1]
            if i-2>=0 and nums[i-2]!='0' and 1<=int(nums[i-2])*10 + int(nums[i-1])<=26 :
                dp[i] += dp[i-2]
        return dp[n]