Compilare: main.cpp: In function 'void ins(Trie*, std::string&, int)': main.cpp:20:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'bool del(Trie*, std::string&, int)': main.cpp:38:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int query(Trie*, std::string&, int)': main.cpp:57:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int prefix(Trie*, std::string&, int, int)': main.cpp:67:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | if(poz == s.size() || node->fiu[id] == nullptr) | ~~~~^~~~~~~~~~~