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2 years ago
package class37;
public class Problem_0226_InvertBinaryTree {
public class TreeNode {
public int val;
public TreeNode left;
public TreeNode right;
}
public static TreeNode invertTree(TreeNode root) {
if (root == null) {
return null;
}
TreeNode left = root.left;
root.left = invertTree(root.right);
root.right = invertTree(left);
return root;
}
}