题解 | 凯撒解密

class Solution:
    def decodeWangzai(self , password: str, n: int) -> str:
        a=[]
        string=""
        for i in password:
            prev_b=ord(i) 
            now_b=prev_b-n%26 if prev_b-n%26>=97 else prev_b-n%26+26
            a.append(chr(now_b))
        return "".join(a)