Compilare: main.cpp: In function 'int main()': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(i = 0; i < ord.size(); i++){ | ~~^~~~~~~~~~~~ main.cpp:28:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int j = 0; j < s.size(); j++){ | ~~^~~~~~~~~~