diff --git a/notes/10.4 变态跳台阶.md b/notes/10.4 变态跳台阶.md
index f6099a17..63d495d7 100644
--- a/notes/10.4 变态跳台阶.md	
+++ b/notes/10.4 变态跳台阶.md	
@@ -29,31 +29,31 @@ public int jumpFloorII(int target) {
 
 跳上 n-1 级台阶，可以从 n-2 级跳 1 级上去，也可以从 n-3 级跳 2 级上去...，那么
 
-```
+```text
 f(n-1) = f(n-2) + f(n-3) + ... + f(0)
 ```
 
 同样，跳上 n 级台阶，可以从 n-1 级跳 1 级上去，也可以从 n-2 级跳 2 级上去... ，那么
 
-```
+```text
 f(n) = f(n-1) + f(n-2) + ... + f(0)
 ```
 
 综上可得
 
-```
+```text
 f(n) - f(n-1) = f(n-1)
 ```
 
 即
 
-```
+```text
 f(n) = 2*f(n-1)
 ```
 
 所以 f(n) 是一个等比数列
 
-```source-java
+```java
 public int JumpFloorII(int target) {
     return (int) Math.pow(2, target - 1);
 }