diff --git a/problems/0127.单词接龙.md b/problems/0127.单词接龙.md
index b4078913..20ad5182 100644
--- a/problems/0127.单词接龙.md
+++ b/problems/0127.单词接龙.md
@@ -134,9 +134,8 @@ public int ladderLength(String beginWord, String endWord, List<String> wordList)
 }
 ```
 
-## Java 双向BFS
-
 ```java
+// Java 双向BFS
 class Solution {
     // 判断单词之间是否之差了一个字母
     public boolean isValid(String currentWord, String chooseWord) {
diff --git a/problems/0841.钥匙和房间.md b/problems/0841.钥匙和房间.md
index 00263cac..faf2b97f 100644
--- a/problems/0841.钥匙和房间.md
+++ b/problems/0841.钥匙和房间.md
@@ -273,7 +273,9 @@ class Solution {
         return true;
     }
 }
+```
 
+```Java
 // 广度优先搜索
 class Solution {
     public boolean canVisitAllRooms(List<List<Integer>> rooms) {
@@ -294,7 +296,9 @@ class Solution {
         return true;
     }
 }
+```
 
+```java
 // 广度优先遍历(时间优化)
 class Solution {
     public boolean canVisitAllRooms(List<List<Integer>> rooms) {
@@ -459,4 +463,3 @@ function canVisitAllRooms(rooms: number[][]): boolean {
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>
 </a>
-