Compilare: main.cpp: In function 'void ins(trie*, std::string, int)': main.cpp:19:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if (p == a.size()) return; | ~~^~~~~~~~~~~ main.cpp: In function 'int get(trie*, std::string, int, int)': main.cpp:30:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if (node->nrf == 1 && p != a.size()) { | ~~^~~~~~~~~~~