이진 트리 반전 / 기초

Author: JooKangsan

JooKangSan/[week5]Tree/Invert_Binary_Tree.js

@@ -0,0 +1,20 @@
+/**
+ * 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}
+ */
+function invertTree(root) {
+    if (!root) return null;
+  
+    [root.left, root.right] = [invertTree(root.right), invertTree(root.left)];
+  
+    return root;
+    };
+