diff --git a/problems/0474.一和零.md b/problems/0474.一和零.md
index 7e04ae1e..af50fa5c 100644
--- a/problems/0474.一和零.md
+++ b/problems/0474.一和零.md
@@ -533,6 +533,8 @@ impl Solution {
     }
 }
 ```
+## C
+
 ```c
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
@@ -597,3 +599,4 @@ public class Solution
 <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>
+