Compilare: user.cpp: In function ‘void Insert(Trie*&, std::string&)’: user.cpp:26:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index(0) ; index < word.size() ; ++index) ^ user.cpp: In function ‘int Query(std::string)’: user.cpp:37:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i(0) ; i < word.size() ; ++i) ^ user.cpp: In function ‘void AhoCorasik()’: user.cpp:102:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index(0) ; index < s.size() ; ++index) ^