diff --git a/20230109.md b/20230109.md
index 28daf789..55549aa0 100644
--- a/20230109.md
+++ b/20230109.md
@@ -151,6 +151,7 @@ sum([i ** 2 for i in range(100) if i % 7 == 0])
 ```python []
 list(itertools.combinations([1,2,3,4], 3))
 # [(1, 2, 3), (1, 2, 4), (1, 3, 4), (2, 3, 4)]
+```
 
 Note:
 这题的解法其实也就一行，就是4-8行的这个列表生成式，那么列表生成式是什么捏。
@@ -263,7 +264,7 @@ Note:
 
 ---
 
-## 提一嘴 C++
+## C++
 
 ```cpp [|4|6-7|9-12|14-18]
 #include <algorithm>