diff --git a/docs/notes/剑指 Offer 题解 - 30~39.md b/docs/notes/剑指 Offer 题解 - 30~39.md
index cd64d546..fdd0b24f 100644
--- a/docs/notes/剑指 Offer 题解 - 30~39.md
+++ b/docs/notes/剑指 Offer 题解 - 30~39.md
@@ -87,7 +87,7 @@ public boolean IsPopOrder(int[] pushSequence, int[] popSequence) {
例如，以下二叉树层次遍历的结果为：1,2,3,4,5,6,7
- 
+ 
## 解题思路
@@ -195,7 +195,7 @@ public ArrayList> Print(TreeNode pRoot) {
例如，下图是后序遍历序列 1,3,2 所对应的二叉搜索树。
-
+
## 解题思路
@@ -230,7 +230,7 @@ private boolean verify(int[] sequence, int first, int last) {
下图的二叉树有两条和为 22 的路径：10, 5, 7 和 10, 12
-
+
## 解题思路
@@ -277,21 +277,21 @@ public class RandomListNode {
}
```
-
+
## 解题思路
第一步，在每个节点的后面插入复制的节点。
-
+
第二步，对复制节点的 random 链接进行赋值。
-
+
第三步，拆分。
-
+
```java
public RandomListNode Clone(RandomListNode pHead) {
@@ -333,7 +333,7 @@ public RandomListNode Clone(RandomListNode pHead) {
输入一棵二叉搜索树，将该二叉搜索树转换成一个排序的双向链表。要求不能创建任何新的结点，只能调整树中结点指针的指向。
-
+
## 解题思路
diff --git a/docs/notes/剑指 Offer 题解 - 60~68.md b/docs/notes/剑指 Offer 题解 - 60~68.md
index 602ae124..e53fc552 100644
--- a/docs/notes/剑指 Offer 题解 - 60~68.md
+++ b/docs/notes/剑指 Offer 题解 - 60~68.md
@@ -285,12 +285,12 @@ public int StrToInt(String str) {
### 二叉查找树
-
-
[Leetcode : 235. Lowest Common Ancestor of a Binary Search Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/description/)
二叉查找树中，两个节点 p, q 的公共祖先 root 满足 root.val >= p.val && root.val <= q.val。
+
+
```java
public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {
if (root == null)
@@ -305,12 +305,12 @@ public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {
### 普通二叉树
-
-
[Leetcode : 236. Lowest Common Ancestor of a Binary Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/description/)
在左右子树中查找是否存在 p 或者 q，如果 p 和 q 分别在两个子树中，那么就说明根节点就是最低公共祖先。
+
+
```java
public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {
if (root == null || root == p || root == q)
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