diff --git a/interview/RedCampus/src/main/java/com/markilue/interview/Question1.java b/interview/RedCampus/src/main/java/com/markilue/interview/Question1.java
new file mode 100644
index 0000000..e8d23ba
--- /dev/null
+++ b/interview/RedCampus/src/main/java/com/markilue/interview/Question1.java
@@ -0,0 +1,51 @@
+package com.markilue.interview;
+
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: RedCampus
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 16:23
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question1 {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = Integer.parseInt(sc.nextLine());
+        char[] chars1 = sc.nextLine().toCharArray();
+        new Question1().sovle(chars1);
+
+
+    }
+
+    @Test
+    public void test(){
+//        char a= (char)('d'-3);
+        char[] chars={'a','e','f'};
+        sovle(chars);
+    }
+
+    public void sovle(char[] chars) {
+        char[] result = new char[chars.length];
+        HashMap<Character, Character> map = new HashMap<Character, Character>() {{
+            put('a', 'x');
+            put('b', 'y');
+            put('c', 'z');
+        }};
+        for (int i = 0; i < chars.length; i++) {
+
+            if (map.containsKey(chars[i])) {
+                result[i] = map.get(chars[i]);
+            } else {
+                result[i] = (char) (chars[i] - 3);
+            }
+        }
+        System.out.println(new String(result));
+    }
+}
diff --git a/interview/RedCampus/src/main/java/com/markilue/interview/Question2.java b/interview/RedCampus/src/main/java/com/markilue/interview/Question2.java
new file mode 100644
index 0000000..99ca56e
--- /dev/null
+++ b/interview/RedCampus/src/main/java/com/markilue/interview/Question2.java
@@ -0,0 +1,52 @@
+package com.markilue.interview;
+
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: RedCampus
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 16:36
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question2 {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int time = sc.nextInt();
+
+        while (time-- > 0) {
+            int n = sc.nextInt();
+            int k = sc.nextInt();
+            int[] nums = new int[n];
+            for (int i = 0; i < n; i++) {
+                nums[i] = sc.nextInt();
+            }
+
+        }
+    }
+
+    /**
+     * 一次最多移动k个数
+     * 计算有多少个乱序的
+     *
+     * @param nums
+     * @param k
+     */
+    public void sovle(int[] nums, int k) {
+
+        int count = 0;
+        for (int i = 0; i < nums.length; i++) {
+            if ((i + 1) != nums[i]) {
+                count++;
+            }
+        }
+        if (count % k == 0) {
+            System.out.println(count / k);
+        } else {
+            System.out.println(count / k + 1);
+        }
+
+    }
+}
diff --git a/interview/RedCampus/src/main/java/com/markilue/interview/Question3.java b/interview/RedCampus/src/main/java/com/markilue/interview/Question3.java
new file mode 100644
index 0000000..d1d664e
--- /dev/null
+++ b/interview/RedCampus/src/main/java/com/markilue/interview/Question3.java
@@ -0,0 +1,133 @@
+package com.markilue.interview;
+
+import org.junit.Test;
+
+import java.lang.reflect.Array;
+import java.util.Arrays;
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: RedCampus
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 16:50
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question3 {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        int[] nums = new int[n];
+        for (int i = 0; i < n; i++) {
+            nums[i] = sc.nextInt();
+        }
+        int k = sc.nextInt();//操作的次数
+        int[] left = new int[k];
+        int[] right = new int[k];
+        for (int i = 0; i < k; i++) {
+            left[i] = sc.nextInt() - 1;//-1变成索引
+        }
+        for (int i = 0; i < k; i++) {
+            right[i] = sc.nextInt() - 1;//-1变成索引
+        }
+
+
+        char[] deal = sc.next().toCharArray();//操作手段
+
+
+        int[] dealNum = new int[k];
+        for (int i = 0; i < k; i++) {
+            dealNum[i] = sc.nextInt();
+        }
+    }
+
+    public void test() {
+        Scanner sc = new Scanner(System.in);
+        int n = Integer.parseInt(sc.nextLine());
+        String[] s = sc.nextLine().split(" ");
+        int[] nums = Arrays.stream(s).mapToInt(Integer::parseInt).toArray();
+
+        int k = Integer.parseInt(sc.nextLine());//操作的次数
+        String[] sLeft = sc.nextLine().split(" ");
+        int[] left = Arrays.stream(sLeft).mapToInt(Integer::parseInt).toArray();
+        String[] sRight = sc.nextLine().split(" ");
+        int[] right = Arrays.stream(sRight).mapToInt(Integer::parseInt).toArray();
+
+        String sDeal = sc.nextLine();
+
+        char[] deal = sDeal.toCharArray();//操作手段
+
+        String[] sDealNum = sc.nextLine().split(" ");
+
+        int[] dealNum = Arrays.stream(sDealNum).mapToInt(Integer::parseInt).toArray();
+        new Question3().sovle(nums, left, right, deal, dealNum);
+
+    }
+
+    @Test
+    public void test1() {
+        int[] nums = {5, 4, 7, 4};
+        int[] left = {1, 2, 3, 2};
+        int[] right = {4, 3, 4, 2};
+        char[] deal = {'=', '|', '&', '='};
+        int[] dealNum = {8, 3, 6, 2};
+        sovle1(nums, left, right, deal, dealNum);
+    }
+
+    public void sovle(int[] nums, int[] left, int[] right, char[] deal, int[] dealNum) {
+
+        //分别对数据进行操作
+        for (int i = 0; i < left.length; i++) {
+
+            int start = left[i] - 1;
+            int end = right[i] - 1;
+
+            for (int j = start; j <= end; j++) {
+                if (deal[i] == '|') {
+                    nums[j] |= dealNum[i];
+                } else if (deal[i] == '&') {
+                    nums[j] &= dealNum[i];
+                } else if (deal[i] == '=') {
+                    nums[j] = dealNum[i];
+                }
+            }
+        }
+        for (int i = 0; i < nums.length; i++) {
+            System.out.print(nums[i] + " ");
+        }
+
+
+    }
+
+    public void sovle1(int[] nums, int[] left, int[] right, char[] deal, int[] dealNum) {
+
+        //分别对数据进行操作
+        for (int i = 0; i < left.length; i++) {
+
+            int start = left[i] - 1;
+            int end = right[i] - 1;
+
+            if (deal[i] == '|') {
+                for (int j = start; j <= end; j++) {
+                    nums[j] |= dealNum[i];
+                }
+            } else if (deal[i] == '&') {
+                for (int j = start; j <= end; j++) {
+                    nums[j] &= dealNum[i];
+                }
+            } else if (deal[i] == '=') {
+                for (int j = start; j <= end; j++) {
+                    nums[j] = dealNum[i];
+                }
+            }
+
+        }
+        for (int i = 0; i < nums.length; i++) {
+            System.out.print(nums[i] + " ");
+        }
+
+
+    }
+}
diff --git a/interview/Tencent/src/main/java/com/markilue/interview/ListNode.java b/interview/Tencent/src/main/java/com/markilue/interview/ListNode.java
new file mode 100644
index 0000000..d496916
--- /dev/null
+++ b/interview/Tencent/src/main/java/com/markilue/interview/ListNode.java
@@ -0,0 +1,30 @@
+package com.markilue.interview;
+
+import java.util.List;
+
+/**
+ * @BelongsProject: Tencent
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 20:01
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class ListNode {
+
+    int val;
+    ListNode next = null;
+
+    public ListNode() {
+    }
+
+
+    public ListNode(int val) {
+        this.val = val;
+    }
+
+    public ListNode(int val,ListNode next) {
+        this.val = val;
+        this.next=next;
+    }
+}
diff --git a/interview/Tencent/src/main/java/com/markilue/interview/Question1.java b/interview/Tencent/src/main/java/com/markilue/interview/Question1.java
new file mode 100644
index 0000000..19c9559
--- /dev/null
+++ b/interview/Tencent/src/main/java/com/markilue/interview/Question1.java
@@ -0,0 +1,59 @@
+package com.markilue.interview;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @BelongsProject: Tencent
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 20:01
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question1 {
+
+    /**
+     * 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 head ListNode类
+     * @return ListNode类
+     */
+    public ListNode reorderList(ListNode head) {
+        // write code here
+        if (head.next == null || head.next.next == null) return head;
+
+        ListNode dummy = new ListNode(0, head);
+        ListNode fake = dummy;
+        ListNode cur = head.next;
+        ListNode temp;
+
+        while (cur != null && cur.next != null && cur.next.next != null) {
+            temp = cur.next.next.next;
+            cur.next.next.next = dummy.next;
+            dummy.next = cur.next;
+            cur.next = temp;
+
+            dummy = cur;
+            if (temp != null) {
+                cur = temp.next;
+            }
+        }
+
+        if (cur != null && cur.next != null && cur.next.next == null) {
+            temp=cur.next;
+            temp.next=dummy.next;
+            cur.next=null;
+            dummy.next=temp;
+        }
+        return fake.next;
+
+
+    }
+
+    public void swap(List<Integer> list, int left, int right) {
+        int temp = list.get(left);
+        list.set(left, list.get(right));
+        list.set(right, temp);
+    }
+}
diff --git a/interview/Tencent/src/main/java/com/markilue/interview/Question2.java b/interview/Tencent/src/main/java/com/markilue/interview/Question2.java
new file mode 100644
index 0000000..c10ac79
--- /dev/null
+++ b/interview/Tencent/src/main/java/com/markilue/interview/Question2.java
@@ -0,0 +1,69 @@
+package com.markilue.interview;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: Tencent
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 20:23
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question2 {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int k = Integer.parseInt(sc.nextLine());
+        String[] s = new String[k];
+        for (int i = 0; i < k; i++) {
+            s[i] = sc.nextLine();
+        }
+    }
+
+    @Test
+    public void test(){
+        String[] s={"ab","ca","ccb"};
+        sovle(s);
+    }
+
+    public void sovle(String[] s) {
+
+        backtracking(s,0,new boolean[24]);
+        System.out.println(result1);
+
+
+    }
+
+    StringBuilder sb = new StringBuilder();
+    List<String> result = new ArrayList<String>();
+    int result1=0;
+
+    public void backtracking(String[] s, int i, boolean[] used) {
+
+        if (i == s.length) {
+            result1++;
+            result.add(new String(sb));
+            return;
+        }
+        HashSet<Character> set = new HashSet<>();
+        for (int j = 0; j < s[i].length(); j++) {
+            char c = s[i].charAt(j);
+            if (!set.contains(c)&&!used[c - 'a']) {
+                used[c - 'a'] = true;
+                set.add(c);
+                sb.append(c);
+                backtracking(s, i + 1, used);
+                sb.deleteCharAt(sb.length() - 1);
+                used[c-'a']=false;
+            }
+        }
+
+
+    }
+}
diff --git a/interview/Tencent/src/main/java/com/markilue/interview/Question3.java b/interview/Tencent/src/main/java/com/markilue/interview/Question3.java
new file mode 100644
index 0000000..f26f317
--- /dev/null
+++ b/interview/Tencent/src/main/java/com/markilue/interview/Question3.java
@@ -0,0 +1,85 @@
+package com.markilue.interview;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: Tencent
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 20:51
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question3 {
+
+    public static void main(String[] args) {
+
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        int[] A = new int[n];
+        int[] B = new int[n];
+
+        for (int i = 0; i < n; i++) {
+            A[i]=sc.nextInt();
+        }
+        for (int i = 0; i < n; i++) {
+            B[i]=sc.nextInt();
+        }
+
+        new Question3().sovle(A,B);
+
+    }
+
+    @Test
+    public void test(){
+        int[] A={1,10};
+        int[] B={1,0};
+        sovle(A,B);
+    }
+
+    public void sovle(int[] A,int[] B){
+
+        ArrayList<Integer> list0 = new ArrayList<>();
+        ArrayList<Integer> list1 = new ArrayList<>();
+        ArrayList<Integer> list2 = new ArrayList<>();
+
+        for (int i = 0; i < B.length; i++) {
+            if(B[i]==0){
+                list0.add(i);
+            }else if(B[i]==1){
+                list1.add(i);
+            }else {
+                list2.add(i);
+            }
+        }
+        Collections.sort(list0, (a,b) ->A[a]-A[b]);
+        Collections.sort(list1, (a,b) ->A[a]-A[b]);
+        Collections.sort(list2, (a,b) ->A[a]-A[b]);
+        int[] c = new int[A.length];
+        int k=0;
+
+        for (Integer i : list0) {
+            c[i]=++k;
+        }
+
+        for (Integer i : list1) {
+            c[i]=++k;
+        }
+
+        for (Integer i : list2) {
+            c[i]=++k;
+        }
+
+        long result=0;
+        for (int i = 0; i < A.length; i++) {
+            result+=Math.abs(c[i]-A[i]);
+        }
+        System.out.println(result);
+
+    }
+}
diff --git a/interview/Tencent/src/main/java/com/markilue/interview/Question4.java b/interview/Tencent/src/main/java/com/markilue/interview/Question4.java
new file mode 100644
index 0000000..561613c
--- /dev/null
+++ b/interview/Tencent/src/main/java/com/markilue/interview/Question4.java
@@ -0,0 +1,127 @@
+package com.markilue.interview;
+
+import org.junit.Test;
+
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Scanner;
+
+/**
+ * @BelongsProject: Tencent
+ * @BelongsPackage: com.markilue.interview
+ * @Author: marklue
+ * @CreateTime: 2023/3/26 21:09
+ * @Description: TODO
+ * @Version: 1.0
+ */
+public class Question4 {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        int[] nums = new int[n];
+        for (int i = 0; i < n; i++) {
+            nums[i] = sc.nextInt();
+        }
+    }
+
+    @Test
+    public void test() {
+        int[] nums = {1, 2, 1};
+        sovle3(nums);
+    }
+
+    public void sovle(int[] nums) {
+
+        Arrays.sort(nums);
+        backtracking(nums, 0, 1, 0, 0);
+        System.out.println(result);
+
+    }
+
+    @Test
+    public void test3() {
+        System.out.println(0 ^ 2);
+    }
+
+
+    List<Integer> cur = new ArrayList<>();
+    List<List<Integer>> result = new ArrayList<>();
+
+    public void backtracking(int[] nums, int start, int cheng, int yi, int level) {
+        if (level != 0 && cheng == yi) {
+            result.add(new ArrayList<>(cur));
+        }
+
+        for (int i = start; i < nums.length; i++) {
+//            if (i != start && nums[i] == nums[i - 1]) {
+//                continue;
+//            }
+
+            cur.add(nums[i]);
+            backtracking(nums, i + 1, cheng * nums[i], yi ^ nums[i], level + 1);
+            cur.remove(cur.size() - 1);
+
+
+        }
+
+    }
+
+
+    public void solve1(int[] nums) {
+
+        int result = 0;
+        for (int i = 0; i < nums.length; i++) {
+            int cheng = 1;
+            int yihou = 0;
+            for (int j = i; j < nums.length; j++) {
+                cheng *= nums[j];
+                yihou ^= nums[j];
+                if (cheng == yihou) result++;
+            }
+        }
+        System.out.println(result);
+    }
+
+
+    //统计每个词出现的个数
+    public void sovle3(int[] nums) {
+
+        int max = 0;
+        int min = Integer.MAX_VALUE;
+
+        //统计每个词出现的次数
+        for (int i = 0; i < nums.length; i++) {
+            if (max < nums[i]) max = nums[i];
+            if (min > nums[i]) min = nums[i];
+        }
+
+        int[] count = new int[max - min + 1];
+
+        int result = 0;
+        for (int i = 0; i < nums.length; i++) {
+            count[nums[i] - min]++;
+            result++;//统计单个的值
+        }
+
+        ArrayList<Integer> count1 = new ArrayList<>();
+        int num = 0;
+        for (int i = 0; i < count.length; i++) {
+            //统计个数超过2的值
+            if (count[i] != 0) num++;
+            if (count[i] >= 2) {
+                int temp = count[i] / 2;
+                count1.add(temp);
+            }
+        }
+        int total = 1;
+        for (int i = 0; i < count1.size(); i++) {
+            total *= count1.get(i);
+        }
+        result += total * (num - 1);
+        System.out.println(result);
+
+    }
+}