Compilare: user.cpp: In function ‘void Verif(int)’: user.cpp:25:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < V[node].size(); j ++) ^ user.cpp: In function ‘int main()’: user.cpp:49:21: warning: unused variable ‘x’ [-Wunused-variable] for (int i = 1, x, y; i < n; i ++) ^ user.cpp:49:24: warning: unused variable ‘y’ [-Wunused-variable] for (int i = 1, x, y; i < n; i ++) ^