From 9e84d50bb5fc7005473575168f50c6df0dc1c673 Mon Sep 17 00:00:00 2001
From: cediackermann <ackermanncedi@gmail.com>
Date: Mon, 15 Jun 2026 08:36:20 +0200
Subject: [PATCH] complete invertTree

---
 Sources/LeetCode/LeetCode.swift | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/Sources/LeetCode/LeetCode.swift b/Sources/LeetCode/LeetCode.swift
index 6b21cff..7d597ce 100644
--- a/Sources/LeetCode/LeetCode.swift
+++ b/Sources/LeetCode/LeetCode.swift
@@ -37,11 +37,11 @@ enum LeetCode {
     }
 
     static func invertTree(_ root: TreeNode?) -> TreeNode? {
-        var invertedTree: TreeNode
-        if root?.left != nil || root?.right != nil {
-            guard let nodeVal = root?.val else {
-            }
-            invertedTree = TreeNode(nodeVal, root?.right, root?.left)
+        var invertedTree: TreeNode?
+        if let val = root?.val {
+            invertedTree = TreeNode(val, invertTree(root?.right), invertTree(root?.left))
+        } else {
+            invertedTree = root
         }
         return invertedTree
     }