Compilare: main.cpp: In function 'int main()': main.cpp:18:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = bits - 1;i >= 0 && index < s.size();--i) | ~~~~~~^~~~~~~~~~ main.cpp:25:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | if(index == s.size()) | ~~~~~~^~~~~~~~~~~