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.
题目的意思是：给你一个网址，你能编码成一个短网址，根据这个短网址也能解码到原来的网址。看了网友的答案后，我顿时哈哈大笑，编程乐趣真是无穷啊！
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));