Compilare: main.cpp: In member function 'void TRIE::add_node(Node*, std::string, int)': main.cpp:26:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In member function 'bool TRIE::delete_node(Node*, std::string, int)': main.cpp:39:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In member function 'void TRIE::count_ap(Node*, std::string, int)': main.cpp:65:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | if(poz > s.size() - 1) | ~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'void TRIE::longest_pref(Node*, std::string, int)': main.cpp:80:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | if(poz > s.size() - 1) | ~~~~^~~~~~~~~~~~~~