| 3 | import java.util.*; |
| 4 | |
| 5 | class Node { |
| 6 | public int val; |
| 7 | public List<Node> neighbors; |
| 8 | public Node() { |
| 9 | val = 0; |
| 10 | neighbors = new ArrayList<Node>(); |
| 11 | } |
| 12 | public Node(int _val) { |
| 13 | val = _val; |
| 14 | neighbors = new ArrayList<Node>(); |
| 15 | } |
| 16 | public Node(int _val, ArrayList<Node> _neighbors) { |
| 17 | val = _val; |
| 18 | neighbors = _neighbors; |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | class Solution { |
| 23 | public Node cloneGraph(Node node) { |