diff --git a/bw/.gitignore b/bm/.gitignore
similarity index 100%
rename from bw/.gitignore
rename to bm/.gitignore
diff --git a/bm/pom.xml b/bm/pom.xml
new file mode 100644
index 0000000..d8927c6
--- /dev/null
+++ b/bm/pom.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.huangge1199.nowcoder</groupId>
+    <artifactId>bm</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+
+    <parent>
+        <groupId>com.huangge1199.nowcoder</groupId>
+        <artifactId>nowcoder</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <dependencies>
+        <dependency>
+            <groupId>com.huangge1199.nowcoder.common</groupId>
+            <artifactId>common</artifactId>
+            <version>1.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <!-- jsoup HTML parser library @ http://jsoup.org/ -->
+            <groupId>org.jsoup</groupId>
+            <artifactId>jsoup</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>cn.hutool</groupId>
+            <artifactId>hutool-all</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file
diff --git a/bm/src/main/java/com/huangge1199/nowcoder/bm/BM1/Solution.java b/bm/src/main/java/com/huangge1199/nowcoder/bm/BM1/Solution.java
new file mode 100644
index 0000000..ba043da
--- /dev/null
+++ b/bm/src/main/java/com/huangge1199/nowcoder/bm/BM1/Solution.java
@@ -0,0 +1,23 @@
+package com.huangge1199.nowcoder.bm.BM1;
+
+import com.huangge1199.nowcoder.common.ListNode;
+
+/**
+ * @author hyy
+ * @Classname Solution
+ * @Description TODO
+ * @Date 2022/7/26 15:08
+ */
+public class Solution {
+    public ListNode ReverseList(ListNode head) {
+        ListNode cur = head;
+        ListNode pre = null;
+        while (cur != null) {
+            ListNode tmp = cur.next;
+            cur.next = pre;
+            pre = cur;
+            cur = tmp;
+        }
+        return pre;
+    }
+}
diff --git a/bw/src/main/resources/application.properties b/bm/src/main/resources/application.properties
similarity index 100%
rename from bw/src/main/resources/application.properties
rename to bm/src/main/resources/application.properties
diff --git a/bw/pom.xml b/bw/pom.xml
deleted file mode 100644
index f70d11d..0000000
--- a/bw/pom.xml
+++ /dev/null
@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <groupId>com.huangge1199.nowcoder.bw</groupId>
-  <artifactId>bw</artifactId>
-  <version>1.0-SNAPSHOT</version>
-
-  <dependencies>
-    <dependency>
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>1.18.12</version>
-    </dependency>
-    <dependency>
-      <!-- jsoup HTML parser library @ http://jsoup.org/ -->
-      <groupId>org.jsoup</groupId>
-      <artifactId>jsoup</artifactId>
-      <version>1.10.2</version>
-    </dependency>
-    <dependency>
-      <groupId>cn.hutool</groupId>
-      <artifactId>hutool-all</artifactId>
-      <version>5.7.17</version>
-    </dependency>
-    <dependency>
-      <groupId>org.projectlombok</groupId>
-      <artifactId>lombok</artifactId>
-      <version>RELEASE</version>
-      <scope>compile</scope>
-    </dependency>
-  </dependencies>
-
-  <properties>
-    <maven.compiler.source>17</maven.compiler.source>
-    <maven.compiler.target>17</maven.compiler.target>
-  </properties>
-
-</project>
\ No newline at end of file
diff --git a/common/src/main/java/com/huangge1199/nowcoder/common/ListNode.java b/common/src/main/java/com/huangge1199/nowcoder/common/ListNode.java
new file mode 100644
index 0000000..103d094
--- /dev/null
+++ b/common/src/main/java/com/huangge1199/nowcoder/common/ListNode.java
@@ -0,0 +1,19 @@
+package com.huangge1199.nowcoder.common;
+
+import lombok.Data;
+
+/**
+ * @author hyy
+ * @Classname ListNode
+ * @Description TODO
+ * @Date 2022/7/26 15:14
+ */
+@Data
+public class ListNode {
+    public int val;
+    public ListNode next = null;
+
+    ListNode(int val) {
+        this.val = val;
+    }
+}
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..94340ea
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.7.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <groupId>com.huangge1199.nowcoder</groupId>
+    <artifactId>nowcoder</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>nowcoder</name>
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>common</module>
+        <module>bm</module>
+    </modules>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok</artifactId>
+                <version>1.18.24</version>
+            </dependency>
+            <dependency>
+                <!-- jsoup HTML parser library @ http://jsoup.org/ -->
+                <groupId>org.jsoup</groupId>
+                <artifactId>jsoup</artifactId>
+                <version>1.14.3</version>
+            </dependency>
+            <dependency>
+                <groupId>cn.hutool</groupId>
+                <artifactId>hutool-all</artifactId>
+                <version>5.8.3</version>
+            </dependency>
+            <dependency>
+                <groupId>org.projectlombok</groupId>
+                <artifactId>lombok</artifactId>
+                <version>1.18.24</version>
+                <scope>compile</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
\ No newline at end of file