擅长:python、mysql、java
<p>只需在for循环中添加字符:</p>
<pre><code>def encrypt(s):
reversed = s[::-1]
ret_str = ""
length = len(reversed)
for i in range(length // 2):
ret_str += reversed[i] +reversed[length - 1 - i]
if(length % 2 == 1):
ret_str += reversed[length // 2 + 1]
return ret_str
print(encrypt("Hello, world"))
print(encrypt("0123456789"))
</code></pre>
<p>输出:</p>
^{pr2}$