题解 | #牛群的树形结构展开II#
牛群的树形结构展开II
https://www.nowcoder.com/practice/3e89ca58f76d4e6aa44cf29569017410
import java.util.*; /* * public class TreeNode { * int val = 0; * TreeNode left = null; * TreeNode right = null; * public TreeNode(int val) { * this.val = val; * } * } */ public class Solution { /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param root TreeNode类 * @return TreeNode类 */ public TreeNode flattenII (TreeNode root) { // write code here TreeNode result = new TreeNode(-1); TreeNode temp = result; inOrder(root,temp); return result.right; } public TreeNode inOrder(TreeNode node,TreeNode target){ if(node == null){ return target; } target = inOrder(node.left,target); target.right = new TreeNode(node.val); target = target.right; target = inOrder(node.right,target); return target; } }