Simple Encryption #1 - Alternating Split--codewar刷题总结

最新推荐文章于 2025-05-23 09:16:47 发布

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最新推荐文章于 2025-05-23 09:16:47 发布

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分类专栏： codewar 文章标签： python

本文链接：https://blog.youkuaiyun.com/weixin_41821465/article/details/124448679

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本文总结了在codewar上的一道题目——Simple Encryption #1 - Alternating Split。该算法将字符串的奇数索引字符与偶数索引字符交替拼接，重复指定次数。文章提供了加密和解密函数的实现，并分享了解密思路。

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Implement a pseudo-encryption algorithm which given a string S and an integer N concatenates all the odd-indexed characters of S with all the even-indexed characters of S, this process should be repeated N times.

Examples:

encrypt("012345", 1)  =>  "135024"
encrypt("012345", 2)  =>  "135024"  ->  "304152"
encrypt("012345", 3)  =>  "135024"  ->  "304152"  ->  "012345"

encrypt("01234", 1)  =>  "13024"
encrypt("01234", 2)  =>  "13024"  ->  "32104"
encrypt("01234", 3)  =>  "13024"  ->  "32104"  ->  "20314"

Together with the encryption function, you should also implement a decryption function which reverses the process.

If the string S is an empty value or the