网站介绍：文章浏览阅读86次。226. 翻转二叉树前序遍历/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode() {} * TreeNode(int val) { this.val = val; } * TreeNode(int val, TreeNode left, Tree_if (node1 == null || node2 == null) { return ; }
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