Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:22:31: 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:55:13: warning: pointer to a function used in arithmetic [-Wpointer-arith] DFS[i]; ^ user.cpp:55:13: warning: value computed is not used [-Wunused-value] user.cpp:55:13: warning: statement has no effect [-Wunused-value]