Compilare: main.cpp: In function 'void insert(trie*, std::string)': main.cpp:34:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 0; i < w.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:88:11: warning: unused variable 'root' [-Wunused-variable] 88 | trie* root = getNode(); | ^~~~