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22 lines
375 B
22 lines
375 B
package class37;
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public class Problem_0226_InvertBinaryTree {
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public class TreeNode {
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public int val;
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public TreeNode left;
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public TreeNode right;
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}
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public static TreeNode invertTree(TreeNode root) {
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if (root == null) {
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return null;
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}
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TreeNode left = root.left;
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root.left = invertTree(root.right);
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root.right = invertTree(left);
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return root;
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}
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}
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