diff --git a/pom.xml b/pom.xml
index 3ce9832..6798be4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
 		<dependency>
 			<groupId>org.projectlombok</groupId>
 			<artifactId>lombok</artifactId>
-			<version>1.18.20</version>
+			<version>1.18.30</version>
 			<scope>provided</scope>
 		</dependency>
 
diff --git a/src/main/java/cn/whaifree/interview/random/StackForQueue.java b/src/main/java/cn/whaifree/interview/random/StackForQueue.java
new file mode 100644
index 0000000..87a26d4
--- /dev/null
+++ b/src/main/java/cn/whaifree/interview/random/StackForQueue.java
@@ -0,0 +1,111 @@
+package cn.whaifree.interview.random;
+
+import java.util.ArrayDeque;
+import java.util.Queue;
+
+public class StackForQueue {
+
+    public static void main(String[] args) {
+        MyStack myStack = new MyStack();
+        myStack.push(1);
+        myStack.push(2);
+        myStack.push(3);
+        System.out.println(myStack.peek());
+        System.out.println(myStack.pop());
+        System.out.println(myStack.size());
+        while (myStack.size()!=0){
+            System.out.println(myStack.pop());
+        }
+    }
+
+        static  class  MyStack{
+            Queue<Integer> queue1 = new ArrayDeque<>();
+            Queue<Integer> queue2 = new ArrayDeque<>();
+
+            void push(int x){
+                queue1.add(x);
+            }
+
+            int peek() {
+                if (queue1.isEmpty()) {
+                    return Integer.MAX_VALUE;
+                }
+                while (queue1.size()>1){
+                    queue2.add(queue1.poll());
+                }
+                Integer poll = queue1.poll();
+                queue2.add(poll);
+                while (!queue2.isEmpty()) {
+                    queue1.add(queue2.poll());
+                }
+                return poll;
+            }
+
+            int pop(){
+                if (queue1.isEmpty()) {
+                    return Integer.MAX_VALUE;
+                }
+                while (queue1.size()>1){
+                    queue2.add(queue1.poll());
+                }
+                Integer poll = queue1.poll();
+                while (!queue2.isEmpty()) {
+                    queue1.add(queue2.poll());
+                }
+                return poll;
+            }
+
+            int size(){
+                return queue1.size();
+            }
+
+        }
+}
+
+
+class MyStack {
+    Queue<Integer> queue1 = null;
+    Queue<Integer> queue2 = null;
+    public MyStack() {
+        queue1 = new ArrayDeque<>();
+        queue2 = new ArrayDeque<>();
+    }
+
+    public void push(int x) {
+        queue1.add(x);
+
+    }
+
+    public int pop() {
+        if (queue1.isEmpty()) {
+            return Integer.MAX_VALUE;
+        }
+        while (queue1.size()>1){
+            queue2.add(queue1.poll());
+        }
+        Integer poll = queue1.poll();
+        while (!queue2.isEmpty()) {
+            queue1.add(queue2.poll());
+        }
+        return poll;
+    }
+
+    public int top() {
+        if (queue1.isEmpty()) {
+            return Integer.MAX_VALUE;
+        }
+        while (queue1.size()>1){
+            queue2.add(queue1.poll());
+        }
+        Integer poll = queue1.poll();
+        queue2.add(poll);
+        while (!queue2.isEmpty()) {
+            queue1.add(queue2.poll());
+        }
+        return poll;
+    }
+
+    public boolean empty() {
+        return queue1.isEmpty();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java b/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java
new file mode 100644
index 0000000..5a60f1a
--- /dev/null
+++ b/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java
@@ -0,0 +1,16 @@
+package cn.whaifree.leetCode.LinkedList;
+
+import cn.whaifree.leetCode.model.TreeNode;
+
+public class LCR155 {
+
+//    https://leetcode.cn/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof/description/
+
+    class Solution {
+
+
+        public TreeNode treeToDoublyList(TreeNode root) {
+
+        }
+    }
+}
diff --git a/src/main/java/cn/whaifree/tech/dataStructure/listSeries.java b/src/main/java/cn/whaifree/tech/dataStructure/listSeries.java
index 40a9c61..6ab8017 100644
--- a/src/main/java/cn/whaifree/tech/dataStructure/listSeries.java
+++ b/src/main/java/cn/whaifree/tech/dataStructure/listSeries.java
@@ -9,13 +9,26 @@ import java.util.concurrent.locks.ReentrantLock;
 
 public class listSeries {
 
+    public static void main(String[] args) throws InterruptedException {
+        while (true) {
+            Thread.sleep(1000);
+        }
+    }
+
+    @Test
+    public void testFor() throws InterruptedException {
+        while (true) {
+            Thread.sleep(1000);
+        }
+    }
+
     @Test
     public void test() throws IOException, ClassNotFoundException {
 
         ReentrantLock reentrantLock = new ReentrantLock();
 
     }
-    public static void main(String[] args) throws IOException, ClassNotFoundException {
+    public static void ma1in(String[] args) throws IOException, ClassNotFoundException {
         List<User> o = new ArrayList<>();
         o.add(new User(1, "110"));
 
@@ -50,6 +63,8 @@ public class listSeries {
                     ", name='" + name + '\'' +
                     '}';
         }
+
+
     }
 
 }
diff --git a/src/main/java/cn/whaifree/tech/thread/AffinityThreadPoolTest.java b/src/main/java/cn/whaifree/tech/thread/AffinityThreadPoolTest.java
index bab97c7..748b8b5 100644
--- a/src/main/java/cn/whaifree/tech/thread/AffinityThreadPoolTest.java
+++ b/src/main/java/cn/whaifree/tech/thread/AffinityThreadPoolTest.java
@@ -45,7 +45,7 @@ public class AffinityThreadPoolTest {
         l = System.currentTimeMillis();
         synchronized (o) {
             for (int i = 0; i < 3; i++) {
-                int finalI = i;
+                int finalI = i; // 在其他线程拿到 i 时，i 可能已经变了
                 executor.submit("A", () -> {
                     System.out.println(Thread.currentThread().getName() + " A " + finalI);
                     return null;