Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:16:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp:21:18: warning: integer overflow in expression [-Woverflow] Max=-(1ll<<63); ^ user.cpp:22:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:46:16: warning: integer overflow in expression [-Woverflow] MM=-(1ll<<63); ^