Compilare: main.cpp: In member function 'void Trie::Insert(std::string)': main.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while (index < s.size ()) { | ~~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:128:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for (int i = 0; i < s.size (); ++ i) { | ~~^~~~~~~~~~~