题解 | 字符串加解密

def encode(s):
    res=""
    for c in s:
        if c in "0123456789":
            res+=str((int(c)+1)%10)
        if ord('a')<=ord(c)<=ord('z'):
            cur=chr(ord(c)+1)
            if ord(c)+1>ord('z'):
                cur=chr(ord(c)+1-26)
            res+=cur.upper()
        if ord('A')<=ord(c)<=ord('Z'):
            cur=chr(ord(c)+1)
            if ord(c)+1>ord('Z'):
                cur=chr(ord(c)+1-26)
            res+=cur.lower()
    return res

def decode(s):
    res=""
    for c in s:
        if c in "0123456789":
            res+=str((int(c)-1)%10)
        if ord('a')<=ord(c)<=ord('z'):
            cur=chr(ord(c)-1)
            if ord(c)-1<ord('a'):
                cur=chr(ord(c)-1+26)
            res+=cur.upper()
        if ord('A')<=ord(c)<=ord('Z'):
            cur=chr(ord(c)-1)
            if ord(c)-1<ord('A'):
                cur=chr(ord(c)-1+26)
            res+=cur.lower()
    return res
s=input()
t=input()
print(encode(s))
print(decode(t))