diff --git a/problems/0110.平衡二叉树.md b/problems/0110.平衡二叉树.md
index 677fbc32..2e8c239f 100644
--- a/problems/0110.平衡二叉树.md
+++ b/problems/0110.平衡二叉树.md
@@ -635,7 +635,7 @@ var isBalanced = function(root) {
 };
 ```
 
-##C
+## C
 递归法：
 ```c
 int getDepth(struct TreeNode* node) {