Compilare: main.cpp: In member function 'void Trie::insert(std::string, int)': main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i=0; i<name.size(); ++i) { | ~^~~~~~~~~~~~ main.cpp: In member function 'Trie* Trie::getPrefixNode(std::string)': main.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i=0; i<prefix.size(); ++i) { | ~^~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::update(std::string, int)': main.cpp:56:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i=0; i<name.size(); ++i) node = node->children[name[i]-'a']; | ~^~~~~~~~~~~~