Compilare: main.cpp: In function 'int main()': main.cpp:21:14: 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<s.size();i++) | ~^~~~~~~~~ main.cpp:15:9: warning: unused variable 'n' [-Wunused-variable] 15 | int n,cer,a,b,i,tip=0,semn=0,prod,h; | ^ main.cpp:15:39: warning: unused variable 'h' [-Wunused-variable] 15 | int n,cer,a,b,i,tip=0,semn=0,prod,h; | ^