diff --git a/Leecode/src/main/java/com/markilue/leecode/interview/huawei/T0531/Question3.java b/Leecode/src/main/java/com/markilue/leecode/interview/huawei/T0531/Question3.java
index 3caadd7..4cc36df 100644
--- a/Leecode/src/main/java/com/markilue/leecode/interview/huawei/T0531/Question3.java
+++ b/Leecode/src/main/java/com/markilue/leecode/interview/huawei/T0531/Question3.java
@@ -1,5 +1,6 @@
 package com.markilue.leecode.interview.huawei.T0531;
 
+import com.markilue.leecode.tree.TreeNode;
 import org.junit.Test;
 
 import java.util.Scanner;
@@ -104,4 +105,5 @@ public class Question3 {
 
     }
 
+
 }