Compilare: main.cpp: In function 'void ins(trie*, int)': main.cpp:28:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'bool del(trie*, int)': main.cpp:44:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int query(trie*, int)': main.cpp:67:13: 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()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int pref(trie*, int)': main.cpp:81:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | if (poz == s.size()) | ~~~~^~~~~~~~~~~