思路:
// @Title: 寻找二叉搜索树中的目标节点 (寻找二叉搜索树中的目标节点)
// @Author: qisiii
// @Date: 2022-03-01 21:24:07
// @Runtime: 2 ms
// @Memory: 41.5 MB
// @comment:
// @flag:
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
class Solution {
public int kthLargest(TreeNode root, int k) {
List<Integer> shuzu=inorderTraversal(root);
return shuzu.get(shuzu.size()-k);
}
public List<Integer> inorderTraversal(TreeNode root) {
if(root==null){
return new ArrayList();
}
List<Integer> zhong=new ArrayList();
zhong.addAll(inorderTraversal(root.left));
zhong.add(root.val);
zhong.addAll(inorderTraversal(root.right));
return zhong;
}
}