diff --git a/src/main/java/cn/whaifree/interview/TC1.java b/src/main/java/cn/whaifree/interview/TC1.java
new file mode 100644
index 0000000..3cdbc05
--- /dev/null
+++ b/src/main/java/cn/whaifree/interview/TC1.java
@@ -0,0 +1,197 @@
+package cn.whaifree.interview;
+
+import java.util.*;
+
+public class TC1 {
+}
+
+class Main {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        // 注意 hasNext 和 hasNextLine 的区别
+        int i = in.nextInt();
+        int size = in.nextInt();
+        String next = in.next();
+        char[] charArray = next.toCharArray();
+        int[] nums = new int[i];
+        for (int i1 = 0; i1 < charArray.length; i1++) {
+            nums[i1] = charArray[i1] - '0';
+        }
+        method(nums, size);
+
+    }
+
+
+    public static void method(int[] nums, int k) {
+
+        int c = Integer.MAX_VALUE;
+
+        for (int i = 0; i <= nums.length - k; i++) {
+            int left = i;
+            int right = i + k - 1;
+            c = Math.min(c(nums, left, right, c), c);
+        }
+        System.out.println(c);
+    }
+
+    public static int c(int[] nums, int left, int right,int minNow) {
+        int[] newNums = Arrays.copyOfRange(nums, left, right + 1);
+        Arrays.sort(newNums);
+        left = 0;
+        right = newNums.length - 1;
+        int ans = 0 ;
+        while (left < right) {
+            ans += newNums[right] - newNums[left];
+            if (ans >= minNow) {
+                return minNow;
+            }
+            left++;
+            right--;
+        }
+        return ans;
+    }
+}
+
+class p2{
+
+        public static void main(String[] args) {
+            Scanner in = new Scanner(System.in);
+            // 注意 hasNext 和 hasNextLine 的区别
+            int points = in.nextInt();
+            int line = in.nextInt();
+            int s = in.nextInt();
+            int[][] map = new int[points][points];
+            for (int i = 0; i < map.length; i++) {
+                Arrays.fill(map[i], Integer.MIN_VALUE);
+            }
+            for (int i = 0; i < line; i++) {
+                int a = in.nextInt();
+                int b = in.nextInt();
+                int c = in.nextInt();
+                map[a-1][b-1] = c;
+                map[b-1][a-1] = c;
+            }
+
+            for (int k = 0; k < points; k++) {
+                for (int i = 0; i < points; i++) {
+                    for (int j = 0; j < points; j++) {
+                        if (map[i][k] != Integer.MIN_VALUE && map[k][j] != Integer.MIN_VALUE) {
+                            map[i][j] = Math.max(map[i][j], map[i][k] + map[k][j]);
+                        }
+                    }
+                }
+            }
+
+            System.out.println(map);
+
+        }
+}
+
+
+
+class zgyd1{
+    /**
+     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
+     *
+     *
+     * @param nums1 int整型ArrayList
+     * @param nums2 int整型ArrayList
+     * @return int整型ArrayList
+     */
+    public ArrayList<Integer> intersection (ArrayList<Integer> nums1, ArrayList<Integer> nums2) {
+        HashSet<Integer> set1 = new HashSet<>(nums1);
+        HashSet<Integer> set2 = new HashSet<>(nums2);
+        set1.retainAll(set2);
+        return new ArrayList<>(set1);
+    }
+}
+
+class zgdx1{
+
+
+    public static void main(String[] args) {
+        int[][] ints = {
+                {1,0},
+                {2,1}
+        };
+        zgdx1 zgdx1 = new zgdx1();
+        System.out.println(Arrays.toString(zgdx1.findOrder(ints, 3)));
+    }
+    /**
+     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
+     * leetcode210
+     *
+     * @param prerequisites int整型二维数组
+     * @param n int整型
+     * @return int整型一维数组
+     */
+    public int[] findOrder (int[][] prerequisites, int n) {
+        if (n==0) return new int[0];
+        int[] inDegress = new int[n];
+        for (int[] p : prerequisites) {
+            inDegress[p[0]]++;
+        }
+        Queue<Integer> queue = new LinkedList<>();
+        for (int i = 0; i < inDegress.length; i++) {
+            if (inDegress[i] == 0) {
+                queue.offer(i);
+            }
+        }
+
+        int count = 0;
+        int[] res = new int[n];
+        while (!queue.isEmpty()) {
+            int cur = queue.poll();
+            res[count++] = cur;
+            for (int[] prerequisite : prerequisites) {
+                if (prerequisite[1] == cur) {
+                    inDegress[prerequisite[0]]--;
+                    if (inDegress[prerequisite[0]] == 0) {
+                        queue.offer(prerequisite[0]);
+                    }
+                }
+            }
+        }
+        if (count == n) {
+            return res;
+        }
+        return new int[0];
+    }
+}
+
+class t210{
+    // 方法 1 最简单的 BFS
+    public int[] findOrder(int numCourses, int[][] prerequisites) {
+        if (numCourses == 0) return new int[0];
+        int[] inDegrees = new int[numCourses];
+
+
+        // 建立入度表
+        for (int[] p : prerequisites) {
+            inDegrees[p[0]]++; // 记录每个节点的入度
+        }
+        // 入度为0的节点队列
+        Queue<Integer> queue = new LinkedList<>();
+        for (int i = 0; i < inDegrees.length; i++) {
+            if (inDegrees[i] == 0) queue.offer(i); // 入度为 0 的节点可以进行执行
+        }
+        int count = 0;  // 记录可以执行的任务数
+        int[] res = new int[numCourses];  // 完整拓扑排序的执行过程
+
+        // 根据提供的可以执行的任务（入度为 0），删除入度为 0 的节点
+        while (!queue.isEmpty()){
+            int curr = queue.poll(); // 拿到一个可以执行的任务
+            res[count++] = curr;   //  这个任务可以执行，作为下一次执行的节点
+            for (int[] p : prerequisites) {
+                if (p[1] == curr){  //  {a,b} 表示 a 依赖 b b-->a
+                    inDegrees[p[0]]--;
+                    if (inDegrees[p[0]] == 0) queue.offer(p[0]);
+                }
+            }
+        }
+        if (count == numCourses) return res;
+        return new int[0];
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/main/java/cn/whaifree/interview/qihu/p1.java b/src/main/java/cn/whaifree/interview/qihu/p1.java
new file mode 100644
index 0000000..9e319db
--- /dev/null
+++ b/src/main/java/cn/whaifree/interview/qihu/p1.java
@@ -0,0 +1,233 @@
+package cn.whaifree.interview.qihu;
+
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Scanner;
+
+public class p1 {
+
+
+}
+
+class Main {
+    public static void main(String args[]) {
+        Scanner cin = new Scanner(System.in);
+        int num = cin.nextInt();
+        int can = cin.nextInt();
+        int[][] custom = new int[num][2];
+        for (int i = 0; i < num; i++) {
+            custom[i][0] = cin.nextInt();
+            custom[i][1] = cin.nextInt();
+        }
+
+        used = new boolean[can + 1];
+
+        getMaxSatisfied(custom, 0);
+        System.out.println(max);
+    }
+
+    static int now = 0;
+    static int max = Integer.MIN_VALUE;
+    static boolean[] used = null;
+
+    public static void getMaxSatisfied(int[][] custom, int start) {
+        if (start >= custom.length) {
+            max = Math.max(max, now);
+        }
+
+        for (int i = start; i < custom.length; i++) {
+            int[] ints = custom[i];
+            int a = ints[0];
+            int b = ints[1];
+            if (!used[a] && !used[b]) {
+                now++;
+                used[a] = true;
+                used[b] = true;
+                getMaxSatisfied(custom, i + 1);
+                used[a] = false;
+                used[b] = false;
+                now--;
+            }
+        }
+
+    }
+}
+
+class p323 {
+    public static void main(String args[]) {
+
+        Scanner cin = new Scanner(System.in);
+        int n = cin.nextInt();
+        for (int i = 0; i < n; i++) {
+            String next = cin.next();
+            System.out.println(cal(next) ? "Yes" : "No");
+        }
+
+    }
+
+    public static boolean cal(String s) {
+        for (int i = 0; i <= s.length(); i++) {
+            for (int j = 0; j <= 9; j++) {
+                StringBuilder stringBuilder = new StringBuilder(s);
+                stringBuilder.insert(i, j);
+                String[] split = stringBuilder.toString().split("=");
+                int z1 = calVal(split[0]);
+                int z2 = calVal(split[1]);
+                if (z1 == z2) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * 6
+     * 16=1+2*3
+     * 7*8*9=54
+     * 1+1=1+22
+     * 4*6=22+2
+     * 15+7=1+2
+     * 11+1=1+5
+     */
+
+
+    public static int calVal(String s) {
+        Deque<Integer> deque = new LinkedList<>();
+        int res = 0;
+        char[] charArray = s.toCharArray();
+        char pre = ' ';
+        for (int i = 0; i < charArray.length; i++) {
+            StringBuilder str = new StringBuilder();
+            while (i < charArray.length && charArray[i] >= '0' && charArray[i] <= '9') {
+                str.append(charArray[i]);
+                i++;
+            }
+            int num = Integer.parseInt(str.toString());
+            if (pre == '+') {
+                deque.push(num);
+            } else if (pre == '-') {
+                deque.push(-num);
+            } else if (pre == '*') {
+                deque.push(deque.pop() * num);
+            } else {
+                deque.push(num);
+            }
+            if (i < charArray.length) {
+                pre = charArray[i];
+            }
+        }
+
+        while (!deque.isEmpty()) {
+            res += deque.pop();
+        }
+        return res;
+    }
+}
+
+
+class MeidiT1 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        // 注意 hasNext 和 hasNextLine 的区别
+        int i = in.nextInt();
+        System.out.println(isAbsSS(i));
+    }
+
+    public static boolean isAbsSS(Integer integer) {
+        if (isSS(integer)) {
+            String s = String.valueOf(integer);
+            String string = new StringBuilder(s).reverse().toString();
+            return isSS(Integer.parseInt(string));
+        } else {
+            return false;
+        }
+    }
+
+    public static boolean isSS(Integer integer) {
+        if (integer < 2) {
+            return false;
+        }
+        for (int i = 2; i <= Math.sqrt(integer); i++) {
+            if (integer % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+class MeidiT2 {
+
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        for (int i = 0; i < in.nextInt(); i++) {
+            int treeCount = in.nextInt();
+            int[] height = new int[treeCount];
+            int[] l = new int[treeCount];
+            int[] r = new int[treeCount];
+            for (int j = 0; j < treeCount; j++) {
+                l[i] = in.nextInt();
+                r[i] = in.nextInt();
+                height[i] = in.nextInt();
+            }
+
+
+        }
+    }
+
+    public static void method(int[] l, int[] r, int[] height) {
+        int opr = 0;
+        int n = height.length;
+        for (int i = 0; i < n; i++) {
+            if (height[i] > r[i]) {
+                int excess = height[i] - r[i];
+                opr++;
+
+                while (i < n && height[i] > r[i]) {
+                    height[i] -= excess;
+                    i++;
+                }
+
+                i--; // for
+
+            }
+        }
+    }
+}
+
+class MeidiT3 {
+
+    static HashMap<Long, Long> map = new HashMap<>();
+
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        // 注意 hasNext 和 hasNextLine 的区别
+
+        int i = in.nextInt();
+        for (int i1 = 0; i1 < i; i1++) {
+            method(in.nextLong());
+        }
+    }
+
+    public static void method(long num) {
+        long cnt = countOne(num);
+        long target = 2 * cnt;
+        long x = 0;
+        while (countOne(x | num) != target) {
+            x++;
+        }
+        System.out.println(x | num);
+    }
+
+    public static long countOne(long num) {
+        long count = 0;
+        while (num != 0) {
+            num &= (num - 1);
+            count++;
+        }
+        return count;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cn/whaifree/interview/random/StackForQueue.java b/src/main/java/cn/whaifree/interview/random/StackForQueue.java
index 87a26d4..cc088b1 100644
--- a/src/main/java/cn/whaifree/interview/random/StackForQueue.java
+++ b/src/main/java/cn/whaifree/interview/random/StackForQueue.java
@@ -2,6 +2,7 @@ package cn.whaifree.interview.random;
 
 import java.util.ArrayDeque;
 import java.util.Queue;
+import java.util.concurrent.*;
 
 public class StackForQueue {
 
@@ -64,6 +65,39 @@ public class StackForQueue {
 
 
 class MyStack {
+
+    public static void main(String[] args) {
+        // 创建一个固定大小的线程池，使用 SynchronousQueue 作为任务队列
+        ExecutorService executor = new ThreadPoolExecutor(
+                2, // 核心线程数
+                2, // 最大线程数
+                0L, TimeUnit.MILLISECONDS, // 线程空闲时间
+                new SynchronousQueue<Runnable>() // 使用 SynchronousQueue
+        );
+
+        ExecutorService executorService = Executors.newCachedThreadPool();
+        ExecutorService executorService1 = Executors.newFixedThreadPool(1);
+        ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(1);
+        ExecutorService executorService2 = Executors.newSingleThreadExecutor();
+
+        // 提交10个任务到线程池
+        for (int i = 0; i < 10; i++) {
+            final int taskNumber = i;
+            executor.submit(() -> {
+                System.out.println("Task " + taskNumber + " is running on thread " + Thread.currentThread().getName());
+                try {
+                    // 模拟任务执行时间
+                    Thread.sleep(100);
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+                System.out.println("Task " + taskNumber + " is completed");
+            });
+        }
+
+        // 关闭线程池
+        executor.shutdown();
+    }
     Queue<Integer> queue1 = null;
     Queue<Integer> queue2 = null;
     public MyStack() {
diff --git a/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java b/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java
index 5a60f1a..e69de29 100644
--- a/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java
+++ b/src/main/java/cn/whaifree/leetCode/LinkedList/LCR155.java
@@ -1,16 +0,0 @@
-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/test/FanxinTest.java b/src/main/java/cn/whaifree/test/FanxinTest.java
new file mode 100644
index 0000000..442208d
--- /dev/null
+++ b/src/main/java/cn/whaifree/test/FanxinTest.java
@@ -0,0 +1,42 @@
+package cn.whaifree.test;
+
+import java.util.List;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+public class FanxinTest {
+
+    public static void main(String[] args) {
+
+        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(
+                1,
+                2,
+                3
+                ,
+                TimeUnit.SECONDS,
+                new LinkedBlockingQueue<>()
+        );
+
+
+    }
+
+    static class A{
+
+    }
+    interface  B{
+
+    }
+    interface C{
+
+    }
+
+    /**
+     *  T 继承自 A，实现接口 C B
+     * @param item
+     * @param <T>
+     */
+    static <T extends A & C & B> void process(List<? extends Integer> item) {
+
+    }
+}