Compilare: main.cpp: In function 'int32_t main()': main.cpp:60:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(infas.size()>=d && cross(v[i],infas[infas.size()-2],infas[infas.size()-1])>=0){ ~~~~~~~~~~~~^~~ main.cpp:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<infas.size();i++){ ~^~~~~~~~~~~~~