diff --git a/src/main/java/com/cool/one_question_per_day/LeetCode20240825.java b/src/main/java/com/cool/one_question_per_day/LeetCode20240825.java
index d5d15b7..5593511 100644
--- a/src/main/java/com/cool/one_question_per_day/LeetCode20240825.java
+++ b/src/main/java/com/cool/one_question_per_day/LeetCode20240825.java
@@ -1,5 +1,7 @@
 package com.cool.one_question_per_day;
 
+import org.junit.Test;
+
 /**
  * Created with IntelliJ IDEA.
  *
@@ -10,7 +12,22 @@ package com.cool.one_question_per_day;
 public class LeetCode20240825 {
 
     public int findPermutationDifference(String s, String t) {
-
+        int[] arr=new int[26];
+        char[] chars = s.toCharArray();
+        for (int i = 0; i < chars.length; i++) {
+            arr[chars[i]-97]=i;
+        }
+        int res=0;
+        char[] chars1 = t.toCharArray();
+        for (int i = 0; i < chars1.length; i++) {
+            int index = arr[chars1[i] - 97];
+            index=Math.abs(index-i);
+            res+=index;
+        }
+        return res;
+    }
+    @Test
+    public void test(){
+        findPermutationDifference("1","");
     }
-
 }