Compilare: main.cpp: In function 'void SetList(std::string, std::__cxx11::list<element>&)': main.cpp:115:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 115 | for (int i = 0; i < ec.size(); ++i) | ~~^~~~~~~~~~~ main.cpp:128:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | while (i<ec.size() && isdigit(ec[i])) | ~^~~~~~~~~~