Compilare: main.cpp: In function 'int main()': main.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i=0;i<p.size();i++) | ~^~~~~~~~~ main.cpp:10:10: warning: unused variable 'corecta' [-Wunused-variable] 10 | bool corecta=true; | ^~~~~~~