Method longestWord

java/720_Longest_Word_in_Dictionary.java:22–30

(String[] words)

    }*/

    public String longestWord(String[] words) {
        Trie trie = new Trie();
        int index = 0;
        for (String word: words) {
            trie.insert(word, ++index); //indexed by 1
        }
        trie.words = words;
        return trie.dfs();
    }
}
class Node {
    char c;