Compilare: main.cpp: In member function 'void Trie::insert(int)': main.cpp:56:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ind].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::update(std::__cxx11::string, int, int)': main.cpp:79:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos != word.size()) ~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::query(std::__cxx11::string)': main.cpp:103:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++) ~~^~~~~~~~~~