Compilare: main.cpp: In function 'int main()': main.cpp:48:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i=0;i<numar.size();i++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'int top(stiva*)': main.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] 37 | } | ^