# 535 Encode and Decode TinyURL

Note: This is a companion problem to the System Design problem: Design 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 a class to encode a URL and decode a tiny URL.

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.

Implement the `Solution` class:

• `Solution()` Initializes the object of the system.
• `String encode(String longUrl)` Returns a tiny URL for the given `longUrl`.
• `String decode(String shortUrl)` Returns the original long URL for the given shortUrl. It is guaranteed that the given `shortUrl` was encoded by the same object.

Example 1:

``````Input: url = "https://leetcode.com/problems/design-tinyurl"
Output: "https://leetcode.com/problems/design-tinyurl"

Explanation:
Solution obj = new Solution();
string tiny = obj.encode(url); // returns the encoded tiny url.
string ans = obj.decode(tiny); // returns the original url after deconding it.
``````

Constraints:

• `1 <= url.length <= 104`
• `url` is guranteed to be a valid URL.
 `````` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 `````` ``````class Codec: def __init__(self): self.map = {} def encode(self, longUrl: str) -> str: """Encodes a URL to a shortened URL. """ code = hash(longUrl) self.map[code] = longUrl return 'http://tinyurl.com/{}'.format(code) def decode(self, shortUrl: str) -> str: """Decodes a shortened URL to its original URL. """ return self.map[int(shortUrl.split('/')[-1])] # Your Codec object will be instantiated and called as such: # codec = Codec() # codec.decode(codec.encode(url))``````