javahash3.java

    static String Decoding(String[] encodings, String encodedstring) {
        HashMap<String, String> map = new HashMap<>(); // <code, char>
        
        for (String s : encodings) {
            String[] splited = s.split("\\t");
            if (splited[0].equals("[newline]"))
                splited[0] = "\n";
            map.put(splited[1], splited[0]);
        }
        
        String temp = "";
        String answer = "";
        for (int i = 0; i < encodedstring.length(); ++i) {
            char c = encodedstring.charAt(i);
            temp += c;
            if (map.containsKey(temp)) {
                answer += map.get(temp);
                temp = "";
            }
        }

        return answer;
    }