Compilare: main.cpp: In member function 'void Trie::ins(std::string)': main.cpp:37:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In member function 'void Trie::del(std::string)': main.cpp:54:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In member function 'int Trie::cntap(std::string)': main.cpp:66:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In member function 'int Trie::prefix(std::string)': main.cpp:81:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~