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jdy8739.js
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32 lines (27 loc) ยท 689 Bytes
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/**
* Definition for a binary tree node.
* function TreeNode(val, left, right) {
* this.val = (val===undefined ? 0 : val)
* this.left = (left===undefined ? null : left)
* this.right = (right===undefined ? null : right)
* }
*/
/**
* @param {TreeNode} root
* @return {TreeNode}
*/
var invertTree = function (root) {
const dfs = (node) => {
if (!node) {
return null;
}
const temp = node.left;
node.left = node.right;
node.right = temp;
dfs(node.left);
dfs(node.right);
}
dfs(root);
return root;
};
// ์๊ฐ๋ณต์ก๋ O(n) ๊น์ด์ฐ์ ํ์์ผ๋ก ๋ชจ๋ ๋
ธ๋๋ฅผ ์ํํ๋ฏ๋ก