leetcode 226. Invert Binary Tree
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/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */public class Solution { public TreeNode invertTree(TreeNode root) { TreeNode p = root; if (p==null) return p; TreeNode tmp = invertTree(p.left); p.left = invertTree(p.right); p.right = tmp; return p; }} 0 0
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