Compilare: main.cpp: In member function 'void Trie::insert(const std::string&, int)': main.cpp:16:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if(pos == str.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp: In member function 'int Trie::count(const std::string&, int)': main.cpp:28:16: 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:38:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(pos == str.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp: In member function 'void Trie::erase(const std::string&, int)': main.cpp:49:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if(pos == str.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for(int i = 0; i < msg.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:75:45: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int j = 1; j <= 20 && i + j - 1 < msg.size(); j++) { | ~~~~~~~~~~^~~~~~~~~~~~