diff --git a/README.md b/README.md
index 8d3a5d8..e2eeb9c 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,6 @@
 **Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*
 
 - [algorithm-coding](#algorithm-coding)
-  - [directory](#directory)
   - [coding time](#coding-time)
   - [stats](#stats)
   - [acknowledgement](#acknowledgement)
@@ -12,32 +11,8 @@
 
 ## algorithm-coding
 
-algorithm from beginner, include leetcode and other websites.
-
-### directory 
-
-```
-.
-├── LICENSE
-├── README.md
-├── acmmode		// acm 模式输入输出练习
-├── acwing		// acwing 相关
-├── guns		// 工具包
-├── jianzhioffer	// 剑指 offer
-├── lcp			// leetcode lcp
-├── leetcode		// 多年以前随便写的题
-├── leetcode_91_2	// 91 算法第二期
-├── leetcode_daily	// 每日一题
-├── leetcode_hot100	// 热门题
-├── leetcode_interview  // leetcode 面试题系列
-├── leetcode_mock	// 模拟面试
-├── leetcode_week	// 周赛
-├── nowcoder		// 牛客网相关
-├── script		// codecov 测试覆盖执行脚本
-└── topic		// 代码随想录相关
-```
-
-
+The "algorithm-coding" GitHub repository offers a curated collection of coding problems and solutions to aid in interview preparation. 
+It covers essential topics for technical interviews, providing detailed explanations to improve problem-solving skills. 
 
 ### coding time
 
diff --git a/guns/struct.go b/guns/struct.go
index 93c3a57..331d37d 100644
--- a/guns/struct.go
+++ b/guns/struct.go
@@ -1,6 +1,6 @@
 package guns
 
-//TreeNode 树节点
+// TreeNode 树节点
 type TreeNode struct {
 	Val   int
 	Left  *TreeNode
@@ -9,13 +9,13 @@ type TreeNode struct {
 
 //TODO: gen tree
 
-//ListNode 链表节点
+// ListNode 链表节点
 type ListNode struct {
 	Val  int
 	Next *ListNode
 }
 
-//GenLinkList
+// GenLinkList 生成链表
 func GenLinkList(nodes []int) *ListNode {
 	p := &ListNode{}
 	q := p
diff --git a/leetcode_daily/20240210/94. Binary Tree Inorder Traversal.go b/leetcode_daily/20240210/94. Binary Tree Inorder Traversal.go
new file mode 100644
index 0000000..0901821
--- /dev/null
+++ b/leetcode_daily/20240210/94. Binary Tree Inorder Traversal.go	
@@ -0,0 +1,20 @@
+package _0240210
+
+import "algorithm/guns"
+
+type TreeNode = guns.TreeNode
+
+func inorderTraversal(root *TreeNode) []int {
+	var res []int
+	var sub func(n *TreeNode)
+	sub = func(n *TreeNode) {
+		if n == nil {
+			return
+		}
+		sub(n.Left)
+		res = append(res, n.Val)
+		sub(n.Right)
+	}
+	sub(root)
+	return res
+}