Compilare: main.cpp: In function 'void add(ll)': main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare] 35 | if(guess[i].size() >= len) | ~~~~~~~~~~~~~~~~^~~~~~ main.cpp:37:24: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(ll i = len - 1; i < cuv.size(); ++i) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i = 1; i < cuv.size(); ++i) | ~~^~~~~~~~~~~~