Compilare: main.cpp: In function 'long long int Convert(std::string)': main.cpp:57:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i=1; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:62:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int i=0; i<s.size(); i++) | ~^~~~~~~~~