From 6fd1df5bd7c6e665d6caf56368bf0289c2c27cdc Mon Sep 17 00:00:00 2001
From: markwang <www.wang61@qq.com>
Date: Wed, 10 Jul 2024 10:19:39 +0800
Subject: [PATCH] =?UTF-8?q?404.=E5=B7=A6=E5=8F=B6=E5=AD=90=E4=B9=8B?=
 =?UTF-8?q?=E5=92=8C=E5=A2=9E=E5=8A=A0Go=E9=80=92=E5=BD=92=E7=B2=BE?=
 =?UTF-8?q?=E7=AE=80=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0404.左叶子之和.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/problems/0404.左叶子之和.md b/problems/0404.左叶子之和.md
index 1ba71dc9..66aff68f 100644
--- a/problems/0404.左叶子之和.md
+++ b/problems/0404.左叶子之和.md
@@ -337,6 +337,21 @@ func sumOfLeftLeaves(root *TreeNode) int {
 }
 ```
 
+**递归精简版**
+
+```go
+func sumOfLeftLeaves(root *TreeNode) int {
+    if root == nil {
+        return 0
+    }
+    leftValue := 0
+    if root.Left != nil && root.Left.Left == nil && root.Left.Right == nil {
+        leftValue = root.Left.Val
+    }
+    return leftValue + sumOfLeftLeaves(root.Left) + sumOfLeftLeaves(root.Right)
+}
+```
+
 **迭代法(前序遍历)**
 
 ```go