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.

public class Codec {
    Map<Integer, String> map = new HashMap<>();int i=0;public String encode(String longUrl) {
        map.put(i,longUrl);return "http://tinyurl.com/"+i++;
    }public String decode(String shortUrl) {return map.get(Integer.parseInt(shortUrl.replace("http://tinyurl.com/", "")));
    }
}