Compilare: user.cpp: In function ‘void update(int, int, trieNode*)’: user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == S[i].size()) { ^ user.cpp: In function ‘int query(const string&, trieNode*)’: user.cpp:64:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(q = root, i = 0; i < X.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:101:15: warning: unused variable ‘q’ [-Wunused-variable] trieNode* q; ^