Compilare: main.cpp: In member function 'void TrieNode::Insert(std::string&, int)': main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if (depth == str.size()) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In member function 'void TrieNode::Delete(std::string&, int)': main.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if (depth == str.size() && frv) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In member function 'int TrieNode::GetFrv(std::string&, int)': main.cpp:57:19: 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 (depth == str.size()) | ~~~~~~^~~~~~~~~~~~~