LintCode 1186 · Encode and Decode TinyURL.java

	public class Solution {
	List<String> list = new ArrayList<>();
	public String encode(String longUrl) {
	// Encodes a URL to a shortened URL.
	list.add(longUrl);
	return String.valueOf(list.size() - 1);
	}
	public String decode(String shortUrl) {
	// Decodes a shortened URL to its original URL.
	int id = Integer.valueOf(shortUrl);
	return list.get(id);
	}
	}
	// Your Codec object will be instantiated and called as such:
	// Codec codec = new Codec();
	// codec.decode(codec.encode(url));

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