Compilare: main.cpp: In function 'int main()': main.cpp:15:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<num.size();i++) ~^~~~~~~~~~~ main.cpp:29:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<d.size();i++) ~^~~~~~~~~