Compilare: user.cpp: In function ‘void update(int, int, trieNode*)’: user.cpp:37:23: 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:65:37: 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:99:15: warning: unused variable ‘q’ [-Wunused-variable] trieNode* q; ^ user.cpp:127:17: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(j == -1) { ^