Compilare: main.cpp: In member function 'void Trie::Ad(std::string)': main.cpp:41:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (i = 0; i < w.length(); i++) | ~~^~~~~~~~~~~~ main.cpp: In member function 'void Trie::Sterge(std::string)': main.cpp:58:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (i = 0; i < w.length(); i++) | ~~^~~~~~~~~~~~ main.cpp: In member function 'int Trie::NrAp(std::string)': main.cpp:70:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for (i = 0; i < w.length(); i++) | ~~^~~~~~~~~~~~ main.cpp: In member function 'int Trie::Prefix(std::string)': main.cpp:83:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (i = 0; i < w.length(); i++) | ~~^~~~~~~~~~~~