package question;

import java.util.List;

/*
 @author: Roderland
 @create: 2020年08月13日---17:29
*/
public class Question559 {
 public int maxDepth(Node root) {
 if (root==null) return 0;
 int max = 1;
// for (child : root.children) {
// max = Math.max(max, maxDepth(child)+1);
// }
 return max;
 }
}
class Node {
 public int val;
 public List<Node> children;

 public Node() {}

 public Node(int _val) {
 val = _val;
 }

 public Node(int _val, List<Node> _children) {
 val = _val;
 children = _children;
 }
};