2855: 简单密码

解题思路:

注意事项:

参考代码:

s = input()

t = [chr(ord('A')+i) for i in range(26)]

l = ""

for i in s:

    if ord('A') <= ord(i) <= ord('Z'):

        c = t.index(i)

        l += t[(c+21)%26]

    else:

        l+=i

print(l)