Compilare: main.cpp: In function 'void insert(Node*&, std::string&, int)': main.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | if (position == s.size()) { | ~~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:113:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (int i = 0; i < input.size(); i++) { | ~~^~~~~~~~~~~~~~