535. Encode and Decode TinyURL

TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL such as http://tinyurl.com/4e9iAk.

Design the encode and decode methods for the TinyURL service. There is no restriction on how your encode/decode algorithm should work. You just need to ensure that a URL can be encoded to a tiny URL and the tiny URL can be decoded to the original URL.

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这道题其实就是要在短字符和长字符之间建立一一的联系。
所以代码如下：

class Solution {public:    // Encodes a URL to a shortened URL.    string encode(string longUrl) {        return longUrl;    }    // Decodes a shortened URL to its original URL.    string decode(string shortUrl) {        return shortUrl;    }};// Your Solution object will be instantiated and called as such:// Solution solution;// solution.decode(solution.encode(url));