Compilare: main.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > exploade(std::__cxx11::string)': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); ++i){ ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); ++i){ ~~^~~~~~~~~~