diff --git a/README.md b/README.md
index 44f30c4..8a1486e 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,19 @@
:warning:使用本仓库的频度数据或转载文章，需注明本仓库地址！侵权必究！
+## 虾皮shopee（更新至虾皮2021.7.28的面经）
+
+按岗位分类
+
+- [后端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/backend.md)
+- [算法](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/algorithm.md)
+- [客户端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/client.md)
+- [前端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/frontend.md)
+- [测试](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/test.md)
+- [数据开发](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/data.md)
+
+
+
## 字节跳动（更新至牛客2021.7.19的面经）
按岗位分类
@@ -44,20 +57,6 @@
## 微软中国（更新至牛客2021.5.30的面经）
- [SDE](https://github.com/afatcoder/LeetcodeTop/blob/master/microsoft/SDE.md)
-## 虾皮shopee（牛客2020.8.1~2021.5.10的面经）
-
-按岗位分类
-
-- [后端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/backend.md)
-- [算法](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/algorithm.md)
-- [客户端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/client.md)
-- [前端](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/frontend.md)
-- [测试](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/test.md)
-- [数据开发](https://github.com/afatcoder/LeetcodeTop/blob/master/shopee/data.md)
-
-
-
-
## 美团（更新至牛客2021.4.23面经）
按岗位分类
diff --git a/shopee/algorithm.md b/shopee/algorithm.md
index aef68f9..ed2d886 100644
--- a/shopee/algorithm.md
+++ b/shopee/algorithm.md
@@ -2,18 +2,7 @@
|题目|出现次数|链接|
|-|-|-|
+|5. 最长回文子串|2|https://leetcode-cn.com/problems/longest-palindromic-substring|
|915. 分割数组|1|https://leetcode-cn.com/problems/partition-array-into-disjoint-intervals|
-前端
-|题目|出现次数|链接|
-|-|-|-|
-|剑指 Offer 10- I. 斐波那契数列|2|https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof|
-|补充题4. 手撕快速排序|2|https://leetcode-cn.com/problems/sort-an-array|
-|94. 二叉树的中序遍历|2|https://leetcode-cn.com/problems/binary-tree-inorder-traversal|
-|415. 字符串相加|1|https://leetcode-cn.com/problems/add-strings|
-|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
-|349. 两个数组的交集|1|https://leetcode-cn.com/problems/intersection-of-two-arrays|
-|704. 二分查找|1|https://leetcode-cn.com/problems/binary-search|
-|145. 二叉树的后序遍历|1|https://leetcode-cn.com/problems/binary-tree-postorder-traversal|
-|151. 翻转字符串里的单词|1|https://leetcode-cn.com/problems/reverse-words-in-a-string|
-|1. 两数之和|1|https://leetcode-cn.com/problems/two-sum|
-|141. 环形链表|1|https://leetcode-cn.com/problems/linked-list-cycle|
\ No newline at end of file
+|3. 无重复字符的最长子串|1|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters|
+|724. 寻找数组的中心索引|1|https://leetcode-cn.com/problems/find-pivot-index|
\ No newline at end of file
diff --git a/shopee/backend.md b/shopee/backend.md
index ec04ca5..ba3005b 100644
--- a/shopee/backend.md
+++ b/shopee/backend.md
@@ -2,76 +2,108 @@
|题目|出现次数|链接|
|-|-|-|
-|232. 用栈实现队列|7|https://leetcode-cn.com/problems/implement-queue-using-stacks|
-|160. 相交链表|6|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
-|21. 合并两个有序链表|5|https://leetcode-cn.com/problems/merge-two-sorted-lists|
+|232. 用栈实现队列|10|https://leetcode-cn.com/problems/implement-queue-using-stacks|
+|160. 相交链表|8|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
+|1. 两数之和|7|https://leetcode-cn.com/problems/two-sum|
+|21. 合并两个有序链表|7|https://leetcode-cn.com/problems/merge-two-sorted-lists|
+|179. 最大数|5|https://leetcode-cn.com/problems/largest-number|
|704. 二分查找|5|https://leetcode-cn.com/problems/binary-search|
-|1. 两数之和|5|https://leetcode-cn.com/problems/two-sum|
+|146. LRU缓存机制|5|https://leetcode-cn.com/problems/lru-cache|
|226. 翻转二叉树|4|https://leetcode-cn.com/problems/invert-binary-tree|
-|2. 两数相加|4|https://leetcode-cn.com/problems/add-two-numbers|
|206. 反转链表|4|https://leetcode-cn.com/problems/reverse-linked-list|
-|179. 最大数|3|https://leetcode-cn.com/problems/largest-number|
+|2. 两数相加|4|https://leetcode-cn.com/problems/add-two-numbers|
+|82. 删除排序链表中的重复元素 II|4|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii|
+|72. 编辑距离|3|https://leetcode-cn.com/problems/edit-distance|
|15. 三数之和|3|https://leetcode-cn.com/problems/3sum|
-|146. LRU缓存机制|3|https://leetcode-cn.com/problems/lru-cache|
-|3. 无重复字符的最长子串|3|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters|
|94. 二叉树的中序遍历|3|https://leetcode-cn.com/problems/binary-tree-inorder-traversal|
-|102. 二叉树的层序遍历|2|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
-|215. 数组中的第K个最大元素|2|https://leetcode-cn.com/problems/kth-largest-element-in-an-array|
+|34. 在排序数组中查找元素的第一个和最后一个位置|3|https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array|
+|102. 二叉树的层序遍历|3|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
+|3. 无重复字符的最长子串|3|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters|
+|117. 填充每个节点的下一个右侧节点指针 II|3|https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii|
+|76. 最小覆盖子串|3|https://leetcode-cn.com/problems/minimum-window-substring|
+|445. 两数相加 II|3|https://leetcode-cn.com/problems/add-two-numbers-ii|
+|19. 删除链表的倒数第N个节点|2|https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list|
+|补充题5. 手撕归并排序|2|https://leetcode-cn.com/problems/sort-an-array|
+|105. 从前序与中序遍历序列构造二叉树|2|https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal|
+|199. 二叉树的右视图|2|https://leetcode-cn.com/problems/binary-tree-right-side-view|
|141. 环形链表|2|https://leetcode-cn.com/problems/linked-list-cycle|
-|剑指 Offer 22. 链表中倒数第k个节点|2|https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof|
-|34. 在排序数组中查找元素的第一个和最后一个位置|2|https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array|
-|117. 填充每个节点的下一个右侧节点指针 II|2|https://leetcode-cn.com/problems/populating-next-right-pointers-in-each-node-ii|
+|136. 只出现一次的数字|2|https://leetcode-cn.com/problems/single-number|
|剑指 Offer 51. 数组中的逆序对|2|https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof|
-|199. 二叉树的右视图|2|https://leetcode-cn.com/problems/binary-tree-right-side-view|
-|82. 删除排序链表中的重复元素 II|2|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii|
-|110. 平衡二叉树|2|https://leetcode-cn.com/problems/balanced-binary-tree|
-|补充题5. 手撕归并排序|2|https://leetcode-cn.com/problems/sort-an-array|
+|113. 路径总和 II|2|https://leetcode-cn.com/problems/path-sum-ii|
|405. 数字转换为十六进制数|2|https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal|
-|19. 删除链表的倒数第N个节点|2|https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list|
-|227. 基本计算器 II|1|https://leetcode-cn.com/problems/basic-calculator-ii|
-|443. 压缩字符串|1|https://leetcode-cn.com/problems/string-compression|
-|349. 两个数组的交集|1|https://leetcode-cn.com/problems/intersection-of-two-arrays|
-|680. 验证回文字符串 Ⅱ|1|https://leetcode-cn.com/problems/valid-palindrome-ii|
-|528. 按权重随机选择|1|https://leetcode-cn.com/problems/random-pick-with-weight|
-|208. 实现 Trie (前缀树)|1|https://leetcode-cn.com/problems/implement-trie-prefix-tree|
-|225. 用队列实现栈|1|https://leetcode-cn.com/problems/implement-stack-using-queues|
-|83. 删除排序链表中的重复元素|1|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list|
-|92. 反转链表 II|1|https://leetcode-cn.com/problems/reverse-linked-list-ii|
-|97. 交错字符串|1|https://leetcode-cn.com/problems/interleaving-string|
-|300. 最长上升子序列|1|https://leetcode-cn.com/problems/longest-increasing-subsequence|
-|169. 多数元素|1|https://leetcode-cn.com/problems/majority-element|
-|20. 有效的括号|1|https://leetcode-cn.com/problems/valid-parentheses|
-|139. 单词拆分|1|https://leetcode-cn.com/problems/word-break|
-|547. 省份数量（原朋友圈）|1|https://leetcode-cn.com/problems/number-of-provinces|
-|26. 删除排序数组中的重复项|1|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array|
-|239. 滑动窗口最大值|1|https://leetcode-cn.com/problems/sliding-window-maximum|
-|369. 给单链表加一|1|https://leetcode-cn.com/problems/plus-one-linked-list|
-|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
-|101. 对称二叉树|1|https://leetcode-cn.com/problems/symmetric-tree|
-|62. 不同路径|1|https://leetcode-cn.com/problems/unique-paths|
-|54. 螺旋矩阵|1|https://leetcode-cn.com/problems/spiral-matrix|
+|215. 数组中的第K个最大元素|2|https://leetcode-cn.com/problems/kth-largest-element-in-an-array|
+|110. 平衡二叉树|2|https://leetcode-cn.com/problems/balanced-binary-tree|
+|剑指 Offer 22. 链表中倒数第k个节点|2|https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof|
+|239. 滑动窗口最大值|2|https://leetcode-cn.com/problems/sliding-window-maximum|
+|145. 二叉树的后序遍历|2|https://leetcode-cn.com/problems/binary-tree-postorder-traversal|
+|25. K 个一组翻转链表|2|https://leetcode-cn.com/problems/reverse-nodes-in-k-group|
+|236. 二叉树的最近公共祖先|2|https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree|
|23. 合并K个排序链表|1|https://leetcode-cn.com/problems/merge-k-sorted-lists|
-|72. 编辑距离|1|https://leetcode-cn.com/problems/edit-distance|
|53. 最大子序和|1|https://leetcode-cn.com/problems/maximum-subarray|
|718. 最长重复子数组|1|https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray|
|378. 有序矩阵中第K小的元素|1|https://leetcode-cn.com/problems/kth-smallest-element-in-a-sorted-matrix|
|154. 寻找旋转排序数组中的最小值 II|1|https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array-ii|
|295. 数据流的中位数|1|https://leetcode-cn.com/problems/find-median-from-data-stream|
|142. 环形链表 II|1|https://leetcode-cn.com/problems/linked-list-cycle-ii|
-|105. 从前序与中序遍历序列构造二叉树|1|https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal|
|144. 二叉树的前序遍历|1|https://leetcode-cn.com/problems/binary-tree-preorder-traversal|
|42. 接雨水|1|https://leetcode-cn.com/problems/trapping-rain-water|
|167. 两数之和 II - 输入有序数组|1|https://leetcode-cn.com/problems/two-sum-ii-input-array-is-sorted|
-|402. 移掉K位数字|1|https://leetcode-cn.com/problems/remove-k-digits|
+|54. 螺旋矩阵|1|https://leetcode-cn.com/problems/spiral-matrix|
|114. 二叉树展开为链表|1|https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-list|
|153. 寻找旋转排序数组中的最小值|1|https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array|
|剑指 Offer 10- I. 斐波那契数列|1|https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof|
|88. 合并两个有序数组|1|https://leetcode-cn.com/problems/merge-sorted-array|
|5. 最长回文子串|1|https://leetcode-cn.com/problems/longest-palindromic-substring|
|230. 二叉搜索树中第K小的元素|1|https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst|
-|136. 只出现一次的数字|1|https://leetcode-cn.com/problems/single-number|
-|113. 路径总和 II|1|https://leetcode-cn.com/problems/path-sum-ii|
+|300. 最长上升子序列|1|https://leetcode-cn.com/problems/longest-increasing-subsequence|
|415. 字符串相加|1|https://leetcode-cn.com/problems/add-strings|
|138. 复制带随机指针的链表|1|https://leetcode-cn.com/problems/copy-list-with-random-pointer|
|剑指 Offer 62. 圆圈中最后剩下的数字|1|https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof|
-|98. 验证二叉搜索树|1|https://leetcode-cn.com/problems/validate-binary-search-tree|
\ No newline at end of file
+|98. 验证二叉搜索树|1|https://leetcode-cn.com/problems/validate-binary-search-tree|
+|402. 移掉K位数字|1|https://leetcode-cn.com/problems/remove-k-digits|
+|208. 实现 Trie (前缀树)|1|https://leetcode-cn.com/problems/implement-trie-prefix-tree|
+|528. 按权重随机选择|1|https://leetcode-cn.com/problems/random-pick-with-weight|
+|680. 验证回文字符串 Ⅱ|1|https://leetcode-cn.com/problems/valid-palindrome-ii|
+|349. 两个数组的交集|1|https://leetcode-cn.com/problems/intersection-of-two-arrays|
+|443. 压缩字符串|1|https://leetcode-cn.com/problems/string-compression|
+|225. 用队列实现栈|1|https://leetcode-cn.com/problems/implement-stack-using-queues|
+|83. 删除排序链表中的重复元素|1|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list|
+|92. 反转链表 II|1|https://leetcode-cn.com/problems/reverse-linked-list-ii|
+|97. 交错字符串|1|https://leetcode-cn.com/problems/interleaving-string|
+|227. 基本计算器 II|1|https://leetcode-cn.com/problems/basic-calculator-ii|
+|169. 多数元素|1|https://leetcode-cn.com/problems/majority-element|
+|20. 有效的括号|1|https://leetcode-cn.com/problems/valid-parentheses|
+|139. 单词拆分|1|https://leetcode-cn.com/problems/word-break|
+|547. 省份数量（原朋友圈）|1|https://leetcode-cn.com/problems/number-of-provinces|
+|26. 删除排序数组中的重复项|1|https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array|
+|369. 给单链表加一|1|https://leetcode-cn.com/problems/plus-one-linked-list|
+|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
+|101. 对称二叉树|1|https://leetcode-cn.com/problems/symmetric-tree|
+|62. 不同路径|1|https://leetcode-cn.com/problems/unique-paths|
+|513. 找树左下角的值|1|https://leetcode-cn.com/problems/find-bottom-left-tree-value|
+|79. 单词搜索|1|https://leetcode-cn.com/problems/word-search|
+|283. 移动零|1|https://leetcode-cn.com/problems/move-zeroes|
+|48. 旋转图像|1|https://leetcode-cn.com/problems/rotate-image|
+|670. 最大交换|1|https://leetcode-cn.com/problems/maximum-swap|
+|703. 数据流中的第K大元素|1|https://leetcode-cn.com/problems/kth-largest-element-in-a-stream|
+|剑指 Offer 27. 二叉树的镜像|1|https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof|
+|241. 为运算表达式设计优先级|1|https://leetcode-cn.com/problems/different-ways-to-add-parentheses|
+|746. 使用最小花费爬楼梯|1|https://leetcode-cn.com/problems/min-cost-climbing-stairs|
+|187. 重复的DNA序列|1|https://leetcode-cn.com/problems/repeated-dna-sequences|
+|面试题 01.06. 字符串压缩|1|https://leetcode-cn.com/problems/compress-string-lcci|
+|958. 二叉树的完全性检验|1|https://leetcode-cn.com/problems/check-completeness-of-a-binary-tree|
+|剑指 Offer 33. 二叉搜索树的后序遍历序列|1|https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-hou-xu-bian-li-xu-lie-lcof|
+|727. 最小窗口子序列|1|https://leetcode-cn.com/problems/minimum-window-subsequence|
+|118. 杨辉三角|1|https://leetcode-cn.com/problems/pascals-triangle|
+|392. 判断子序列|1|https://leetcode-cn.com/problems/is-subsequence|
+|73. 矩阵置零|1|https://leetcode-cn.com/problems/set-matrix-zeroes|
+|47. 全排列 II|1|https://leetcode-cn.com/problems/permutations-ii|
+|31. 下一个排列|1|https://leetcode-cn.com/problems/next-permutation|
+|151. 翻转字符串里的单词|1|https://leetcode-cn.com/problems/reverse-words-in-a-string|
+|200. 岛屿数量|1|https://leetcode-cn.com/problems/number-of-islands|
+|剑指 Offer 48. 最长不含重复字符的子字符串|1|https://leetcode-cn.com/problems/zui-chang-bu-han-zhong-fu-zi-fu-de-zi-zi-fu-chuan-lcof|
+|1038. 从二叉搜索树到更大和树|1|https://leetcode-cn.com/problems/binary-search-tree-to-greater-sum-tree|
+|123. 买卖股票的最佳时机 III|1|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii|
+|257. 二叉树的所有路径|1|https://leetcode-cn.com/problems/binary-tree-paths|
+|75. 颜色分类|1|https://leetcode-cn.com/problems/sort-colors|
+|628. 三个数的最大乘积|1|https://leetcode-cn.com/problems/maximum-product-of-three-numbers|
\ No newline at end of file
diff --git a/shopee/client.md b/shopee/client.md
index 0bba8ab..b4a55e8 100644
--- a/shopee/client.md
+++ b/shopee/client.md
@@ -1,27 +1,32 @@
我最近开发的[CodeTop网站](https://codetop.cc)可以按照**部门**、**难度**筛选，比markdown更方便检索
|题目|出现次数|链接|
|-|-|-|
-|53. 最大子序和|4|https://leetcode-cn.com/problems/maximum-subarray|
-|剑指 Offer 22. 链表中倒数第k个节点|2|https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof|
-|54. 螺旋矩阵|2|https://leetcode-cn.com/problems/spiral-matrix|
-|144. 二叉树的前序遍历|2|https://leetcode-cn.com/problems/binary-tree-preorder-traversal|
+|53. 最大子序和|5|https://leetcode-cn.com/problems/maximum-subarray|
+|206. 反转链表|3|https://leetcode-cn.com/problems/reverse-linked-list|
|110. 平衡二叉树|2|https://leetcode-cn.com/problems/balanced-binary-tree|
-|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
-|3. 无重复字符的最长子串|1|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters|
-|94. 二叉树的中序遍历|1|https://leetcode-cn.com/problems/binary-tree-inorder-traversal|
-|88. 合并两个有序数组|1|https://leetcode-cn.com/problems/merge-sorted-array|
-|146. LRU缓存机制|1|https://leetcode-cn.com/problems/lru-cache|
-|206. 反转链表|1|https://leetcode-cn.com/problems/reverse-linked-list|
+|144. 二叉树的前序遍历|2|https://leetcode-cn.com/problems/binary-tree-preorder-traversal|
+|54. 螺旋矩阵|2|https://leetcode-cn.com/problems/spiral-matrix|
+|剑指 Offer 22. 链表中倒数第k个节点|2|https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof|
|215. 数组中的第K个最大元素|1|https://leetcode-cn.com/problems/kth-largest-element-in-an-array|
+|300. 最长上升子序列|1|https://leetcode-cn.com/problems/longest-increasing-subsequence|
+|146. LRU缓存机制|1|https://leetcode-cn.com/problems/lru-cache|
+|88. 合并两个有序数组|1|https://leetcode-cn.com/problems/merge-sorted-array|
+|94. 二叉树的中序遍历|1|https://leetcode-cn.com/problems/binary-tree-inorder-traversal|
+|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
+|224. 基本计算器|1|https://leetcode-cn.com/problems/basic-calculator|
+|152. 乘积最大子数组|1|https://leetcode-cn.com/problems/maximum-product-subarray|
+|232. 用栈实现队列|1|https://leetcode-cn.com/problems/implement-queue-using-stacks|
+|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
+|69. x 的平方根|1|https://leetcode-cn.com/problems/sqrtx|
|补充题5. 手撕归并排序|1|https://leetcode-cn.com/problems/sort-an-array|
|41. 缺失的第一个正数|1|https://leetcode-cn.com/problems/first-missing-positive|
|14. 最长公共前缀|1|https://leetcode-cn.com/problems/longest-common-prefix|
|160. 相交链表|1|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
|剑指 Offer 31. 栈的压入、弹出序列|1|https://leetcode-cn.com/problems/zhan-de-ya-ru-dan-chu-xu-lie-lcof|
-|69. x 的平方根|1|https://leetcode-cn.com/problems/sqrtx|
|141. 环形链表|1|https://leetcode-cn.com/problems/linked-list-cycle|
|226. 翻转二叉树|1|https://leetcode-cn.com/problems/invert-binary-tree|
|704. 二分查找|1|https://leetcode-cn.com/problems/binary-search|
|2. 两数相加|1|https://leetcode-cn.com/problems/add-two-numbers|
|剑指 Offer 54. 二叉搜索树的第k大节点|1|https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof|
-|142. 环形链表 II|1|https://leetcode-cn.com/problems/linked-list-cycle-ii|
\ No newline at end of file
+|142. 环形链表 II|1|https://leetcode-cn.com/problems/linked-list-cycle-ii|
+|3. 无重复字符的最长子串|1|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters|
\ No newline at end of file
diff --git a/shopee/data.md b/shopee/data.md
index 133fcc6..4f8c216 100644
--- a/shopee/data.md
+++ b/shopee/data.md
@@ -4,4 +4,6 @@
|-|-|-|
|283. 移动零|2|https://leetcode-cn.com/problems/move-zeroes|
|160. 相交链表|1|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
-|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
\ No newline at end of file
+|补充题4. 手撕快速排序|1|https://leetcode-cn.com/problems/sort-an-array|
+|剑指 Offer 27. 二叉树的镜像|1|https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof|
+|剑指 Offer 09. 用两个栈实现队列|1|https://leetcode-cn.com/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof|
\ No newline at end of file
diff --git a/shopee/frontend.md b/shopee/frontend.md
index b6f089b..2e4e8fe 100644
--- a/shopee/frontend.md
+++ b/shopee/frontend.md
@@ -3,9 +3,9 @@
|题目|出现次数|链接|
|-|-|-|
|剑指 Offer 10- I. 斐波那契数列|2|https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof|
+|415. 字符串相加|2|https://leetcode-cn.com/problems/add-strings|
|补充题4. 手撕快速排序|2|https://leetcode-cn.com/problems/sort-an-array|
|94. 二叉树的中序遍历|2|https://leetcode-cn.com/problems/binary-tree-inorder-traversal|
-|415. 字符串相加|1|https://leetcode-cn.com/problems/add-strings|
|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
|349. 两个数组的交集|1|https://leetcode-cn.com/problems/intersection-of-two-arrays|
|704. 二分查找|1|https://leetcode-cn.com/problems/binary-search|
diff --git a/shopee/test.md b/shopee/test.md
index b7c29f2..fb82abf 100644
--- a/shopee/test.md
+++ b/shopee/test.md
@@ -2,30 +2,35 @@
|题目|出现次数|链接|
|-|-|-|
-|136. 只出现一次的数字|3|https://leetcode-cn.com/problems/single-number|
-|14. 最长公共前缀|3|https://leetcode-cn.com/problems/longest-common-prefix|
|88. 合并两个有序数组|3|https://leetcode-cn.com/problems/merge-sorted-array|
|70. 爬楼梯|3|https://leetcode-cn.com/problems/climbing-stairs|
-|1. 两数之和|2|https://leetcode-cn.com/problems/two-sum|
+|14. 最长公共前缀|3|https://leetcode-cn.com/problems/longest-common-prefix|
+|136. 只出现一次的数字|3|https://leetcode-cn.com/problems/single-number|
+|141. 环形链表|2|https://leetcode-cn.com/problems/linked-list-cycle|
+|8. 字符串转换整数 (atoi)|2|https://leetcode-cn.com/problems/string-to-integer-atoi|
+|121. 买卖股票的最佳时机|2|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock|
+|278. 第一个错误的版本|2|https://leetcode-cn.com/problems/first-bad-version|
|59. 螺旋矩阵 II|2|https://leetcode-cn.com/problems/spiral-matrix-ii|
|剑指 Offer 10- I. 斐波那契数列|2|https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof|
-|278. 第一个错误的版本|2|https://leetcode-cn.com/problems/first-bad-version|
-|141. 环形链表|2|https://leetcode-cn.com/problems/linked-list-cycle|
-|160. 相交链表|2|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
|704. 二分查找|2|https://leetcode-cn.com/problems/binary-search|
+|160. 相交链表|2|https://leetcode-cn.com/problems/intersection-of-two-linked-lists|
|34. 在排序数组中查找元素的第一个和最后一个位置|2|https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array|
-|232. 用栈实现队列|1|https://leetcode-cn.com/problems/implement-queue-using-stacks|
-|206. 反转链表|1|https://leetcode-cn.com/problems/reverse-linked-list|
-|121. 买卖股票的最佳时机|1|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock|
-|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
-|145. 二叉树的后序遍历|1|https://leetcode-cn.com/problems/binary-tree-postorder-traversal|
+|1. 两数之和|2|https://leetcode-cn.com/problems/two-sum|
+|15. 三数之和|2|https://leetcode-cn.com/problems/3sum|
+|5. 最长回文子串|2|https://leetcode-cn.com/problems/longest-palindromic-substring|
+|补充题13. 中文数字转阿拉伯数字|1||
|剑指 Offer 03. 数组中重复的数字|1|https://leetcode-cn.com/problems/shu-zu-zhong-zhong-fu-de-shu-zi-lcof|
+|145. 二叉树的后序遍历|1|https://leetcode-cn.com/problems/binary-tree-postorder-traversal|
+|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal|
+|350. 两个数组的交集 II|1|https://leetcode-cn.com/problems/intersection-of-two-arrays-ii|
+|268. 缺失数字|1|https://leetcode-cn.com/problems/missing-number|
+|206. 反转链表|1|https://leetcode-cn.com/problems/reverse-linked-list|
|877. 石子游戏|1|https://leetcode-cn.com/problems/stone-game|
|162. 寻找峰值|1|https://leetcode-cn.com/problems/find-peak-element|
+|232. 用栈实现队列|1|https://leetcode-cn.com/problems/implement-queue-using-stacks|
|168. Excel表列名称|1|https://leetcode-cn.com/problems/excel-sheet-column-title|
|191. 位1的个数|1|https://leetcode-cn.com/problems/number-of-1-bits|
|647. 回文子串|1|https://leetcode-cn.com/problems/palindromic-substrings|
-|15. 三数之和|1|https://leetcode-cn.com/problems/3sum|
|20. 有效的括号|1|https://leetcode-cn.com/problems/valid-parentheses|
|剑指 Offer 22. 链表中倒数第k个节点|1|https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof|
|125. 验证回文串|1|https://leetcode-cn.com/problems/valid-palindrome|