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| public class Solution { public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int val) { this.val = val; } } public void Mirror(TreeNode root) { if(root!=null){ TreeNode temp = root.left; root.left = root.right; root.right = temp; Mirror(root.left); Mirror(root.right); } } }
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