Compilare: main.cpp: In member function 'int Trie::insert(std::__cxx11::string)': main.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < cuv.size(); i++) ~~^~~~~~~~~~~~ main.cpp:46:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == cuv.size() - 1) ~~^~~~~~~~~~~~~~~~~ main.cpp:49:2: warning: control reaches end of non-void function [-Wreturn-type] } ^