diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index e9a4334..07e5858 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,5 +2,6 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$/../../../" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/MathExamSystem.java b/src/MathExamSystem.java
index b20477b..17ea70b 100644
--- a/src/MathExamSystem.java
+++ b/src/MathExamSystem.java
@@ -1,7 +1,5 @@
 //TIP 要<b>运行</b>代码，请按 <shortcut actionId="Run"/> 或
 // 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
-
-
 import java.io.*;
 import java.nio.file.*;
 import java.text.SimpleDateFormat;