Compilare: main.cpp: In member function 'void Trie::insert(std::string)': main.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < word.length(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::remove(std::string)': main.cpp:92:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for (int i = 0; i < word.length(); i++) { | ~~^~~~~~~~~~~~~~~