Compilare: user.cpp: In function ‘void sterge(int, int)’: user.cpp:14:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod1].size();i++) ^ user.cpp:20:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod2].size();i++) ^ user.cpp: In function ‘void elimina(int)’: user.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[i].size();j++) ^