Compilare: main.cpp: In function 'void afis(std::vector<int>)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++) ~^~~~~~~~~ main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++) ~^~~~~~~~~ main.cpp:65:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=a.size();i<b.size();i++) ~^~~~~~~~~