Compilare: main.cpp: In member function 'void Trie::add(int, std::string&)': main.cpp:104:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In member function 'void Trie::del(int, std::string&)': main.cpp:116:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 116 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In member function 'int Trie::nrapp(int, std::string&)': main.cpp:128:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In member function 'int Trie::lcp(int, std::string&)': main.cpp:136:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | if(poz==s.size()) return 0; | ~~~^~~~~~~~~~