x/masx200_leetcode_test/invert-binary-tree/index.ts
12345678910111213import { TreeNode } from "../binary-tree-inorder-traversal/TreeNode.ts";export default function invertTree(root: TreeNode | null): TreeNode | null { if (root === null) { return null; } const left = invertTree(root.left); const right = invertTree(root.right); root.left = right; root.right = left; return root;}