Compilare: main.cpp: In member function 'short unsigned int rhash::hash(const std::string&)': main.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | while (i < b.size()) { | ~~^~~~~~~~~~