Compilare: main.cpp: In function 'int main()': main.cpp:77:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int i=0;i<S.size();i++) | ~^~~~~~~~~ main.cpp:96:32: warning: unused variable 'new_nr' [-Wunused-variable] 96 | int new_mask=0,new_nr=0; | ^~~~~~