Qual o erro, Heitor?

class WordDictionary {
private:
    int nodes;
    vector<int> mx;
    vector<vector<int>> trie;

public:
    WordDictionary() {
        nodes = 1;
        mx.push_back(0);
        trie.emplace_back(26, -1);
    }

    void addWord(string word) {
        addWord(word, 0, 0);
        cout << mx[0] << "\n";
    }

    bool search(string word) {
        return search(word, 0, 0);
    }

private:
    int addWord(string &word, int node, int i) {
        cout << node << " " << i << "\n";
        if (i >= (int) word.size()) {
            cout << "returning\n";
            return mx[node] = 1;
        }

        char c = word[i];
        if (trie[node][c - 'a'] == -1) {
            mx.push_back(0);
            trie.emplace_back(26, -1);
            trie[node][c - 'a'] = nodes++;
        }

        mx[node] = max(mx[node], addWord(word, trie[node][c - 'a'], i + 1) + 1);
        cout << node << " " << mx[node] << "\n";
        return mx[node];
    }

    bool search(string &word, int node, int i) {
        if (node == -1) {
            return false;
        }

        if (i >= (int) word.size()) {
            return true;
        }

        if (word[i] != '.') {
            return search(word, trie[node][word[i] - 'a'], i + 1);
        }

        for (char c = 'a'; c <= 'z'; c++) {
            if (search(word, trie[node][c - 'a'], i + 1)) {
                return true;
            }
        }

        return false;
    }
};

/**
 * Your WordDictionary object will be instantiated and called as such:
 * WordDictionary* obj = new WordDictionary();
 * obj->addWord(word);
 * bool param_2 = obj->search(word);
 */