Compilare: main.cpp: In function 'int main()': main.cpp:69:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(int i = 0; i <=s.length(); i++){ | ~~^~~~~~~~~~~~ main.cpp:76:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int i = 0; i < s_aux.length(); i++){ | ~~^~~~~~~~~~~~~~~~