Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:29:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<V[x].size(); i++) ^ user.cpp: In function ‘void df(int, int)’: user.cpp:42:33: 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:81:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y; ^