Compilare: main.cpp: In member function 'void Trie::insert(const std::string&, int)': main.cpp:18:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | if (pos == str.size()) | ~~~~^~~~~~~~~~~~~ main.cpp: In member function 'int Trie::count(const std::string&, int)': main.cpp:28:17: 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 (pos == str.size()) | ~~~~^~~~~~~~~~~~~ main.cpp: In member function 'int Trie::lcp(const std::string&, int)': main.cpp:36:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if (pos == str.size()) | ~~~~^~~~~~~~~~~~~ main.cpp: In member function 'void Trie::erase(const std::string&, int)': main.cpp:45:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | if (pos == str.size()) | ~~~~^~~~~~~~~~~~~