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<n.size();i++) | ~^~~~~~~~~ main.cpp:19:10: warning: unused variable 'pe' [-Wunused-variable] 19 | bool pe=0; | ^~ main.cpp:33:17: warning: 'nr' may be used uninitialized in this function [-Wmaybe-uninitialized] 33 | timp+=nr; | ~~~~^~~~