diff --git a/BankAccount/.gitignore b/BankAccount/.gitignore
new file mode 100644
index 0000000..13275f1
--- /dev/null
+++ b/BankAccount/.gitignore
@@ -0,0 +1,30 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/BankAccount/.idea/.gitignore b/BankAccount/.idea/.gitignore
new file mode 100644
index 0000000..b6b1ecf
--- /dev/null
+++ b/BankAccount/.idea/.gitignore
@@ -0,0 +1,10 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 已忽略包含查询文件的默认文件夹
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
diff --git a/BankAccount/.idea/misc.xml b/BankAccount/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/BankAccount/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/BankAccount/.idea/modules.xml b/BankAccount/.idea/modules.xml
new file mode 100644
index 0000000..b1643fd
--- /dev/null
+++ b/BankAccount/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/BankAccount.iml" filepath="$PROJECT_DIR$/BankAccount.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/BankAccount/.idea/vcs.xml b/BankAccount/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/BankAccount/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/BankAccount/BankAccount.iml b/BankAccount/BankAccount.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/BankAccount/BankAccount.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/lianxi/.gitignore b/lianxi/.gitignore
new file mode 100644
index 0000000..13275f1
--- /dev/null
+++ b/lianxi/.gitignore
@@ -0,0 +1,30 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/lianxi/.idea/.gitignore b/lianxi/.idea/.gitignore
new file mode 100644
index 0000000..b6b1ecf
--- /dev/null
+++ b/lianxi/.idea/.gitignore
@@ -0,0 +1,10 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 已忽略包含查询文件的默认文件夹
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
diff --git a/lianxi/.idea/misc.xml b/lianxi/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/lianxi/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lianxi/.idea/modules.xml b/lianxi/.idea/modules.xml
new file mode 100644
index 0000000..ee75ca6
--- /dev/null
+++ b/lianxi/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/lianxi.iml" filepath="$PROJECT_DIR$/lianxi.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/lianxi/.idea/vcs.xml b/lianxi/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/lianxi/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lianxi/lianxi.iml b/lianxi/lianxi.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/lianxi/lianxi.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/lianxi/src/com/test/Test.java b/lianxi/src/com/test/Test.java
new file mode 100644
index 0000000..332157b
--- /dev/null
+++ b/lianxi/src/com/test/Test.java
@@ -0,0 +1,9 @@
+package com.test;
+
+import java.util.Scanner;
+
+public class Test {
+    public static void main(String[] args) {
+        Scanner sc=new Scanner()
+    }
+}
diff --git a/pair/src/Pair.java b/pair/src/Pair.java
deleted file mode 100644
index 5745c1f..0000000
--- a/pair/src/Pair.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package PACKAGE_NAME;
-
-public class Pair {
-}
diff --git a/w/.idea/workspace.xml b/w/.idea/workspace.xml
new file mode 100644
index 0000000..a295db9
--- /dev/null
+++ b/w/.idea/workspace.xml
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="4f5b7330-c5ad-49b5-9057-9d2c8a4a8591" name="更改" comment="">
+      <change afterPath="$PROJECT_DIR$/../USB_homework/src/Computer.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/../USB_homework/src/Keyboard.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/../USB_homework/src/Mouse.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/../USB_homework/src/USB.java" afterDir="false" />
+    </list>
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FileTemplateManagerImpl">
+    <option name="RECENT_TEMPLATES">
+      <list>
+        <option value="Class" />
+      </list>
+    </option>
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
+  </component>
+  <component name="ProjectColorInfo">{
+  &quot;associatedIndex&quot;: 7
+}</component>
+  <component name="ProjectId" id="3Bgz6G6LWcxg1pQggb07pCvcr3E" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent">{
+  &quot;keyToString&quot;: {
+    &quot;ModuleVcsDetector.initialDetectionPerformed&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.git.unshallow&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.typescript.service.memoryLimit.init&quot;: &quot;true&quot;,
+    &quot;git-widget-placeholder&quot;: &quot;main&quot;,
+    &quot;kotlin-language-version-configured&quot;: &quot;true&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;,
+    &quot;应用程序.Main.executor&quot;: &quot;Run&quot;
+  }
+}</component>
+  <component name="RunManager">
+    <configuration name="Main" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
+      <option name="MAIN_CLASS_NAME" value="Main" />
+      <module name="shape_homework" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration default="true" type="JetRunConfigurationType">
+      <module name="shape_homework" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration default="true" type="KotlinStandaloneScriptRunConfigurationType">
+      <module name="shape_homework" />
+      <option name="filePath" />
+      <method v="2" />
+    </configuration>
+    <recent_temporary>
+      <list>
+        <item itemvalue="应用程序.Main" />
+      </list>
+    </recent_temporary>
+  </component>
+  <component name="SharedIndexes">
+    <attachedChunks>
+      <set>
+        <option value="bundled-jdk-30f59d01ecdd-2fc7cc6b9a17-intellij.indexing.shared.core-IU-253.31033.145" />
+        <option value="bundled-js-predefined-d6986cc7102b-9b0f141eb926-JavaScript-IU-253.31033.145" />
+      </set>
+    </attachedChunks>
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="默认任务">
+      <changelist id="4f5b7330-c5ad-49b5-9057-9d2c8a4a8591" name="更改" comment="" />
+      <created>1774925328545</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1774925328545</updated>
+      <workItem from="1774925329628" duration="2524000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/w6/.idea/vcs.xml b/w6/.idea/vcs.xml
index 6c0b863..288b36b 100644
--- a/w6/.idea/vcs.xml
+++ b/w6/.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