Compilare: user.cpp: In function ‘int main()’: user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ordine.size() != N){ ^ user.cpp:30:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < graf[j].size(); ++k){ ^ user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < ordine.size(); ++i) ^