Compilare: user.cpp: In function ‘void conex(int)’: user.cpp:20:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:48:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(idx[nod] < v[nod].size()) ^ user.cpp:59:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(idx[nod] >= v[nod].size()) ^