题解 | #字符串加解密#

import sys

def code(c):#加密函数
    for i in range(len(c)):
        if c[i].isdigit():
            c[i]=str((int(c[i])+1)%10)
        else:
            if c[i].isupper():
                if c[i]=='Z':
                    c[i]='a'
                else:
                    c[i]=chr(ord(c[i])+1).lower()
            else:
                if c[i]=='z':
                    c[i]='A'
                else:
                    c[i]=chr(ord(c[i])+1).upper()
    print(''.join(c))

def encode(c):#解密函数
    for i in range(len(c)):
        if c[i].isdigit():
            if int(c[i])==0:
                c[i]='9' #要注意是字符不是数字，否则会报错
            else:
                c[i]=str(int(c[i])-1)
        else:
            if c[i].isupper():
                if c[i]=='A':
                    c[i]='z'
                else:
                    c[i]=chr(ord(c[i])-1).lower()
            else:
                if c[i]=='a':
                    c[i]='Z'
                else:
                    c[i]=chr(ord(c[i])-1).upper()
    print(''.join(c))

a=list(input())
b=list(input())
code(a)
encode(b)