Compilare: main.cpp: In function 'bool good(std::string)': main.cpp:15:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:35:43: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 35 | if(s[i] != (v[i]+'0') || s.size() > n){ | ~~~~~~~~~^~~ main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | return (s.size() == n); | ~~~~~~~~~^~~~