众所周知，字节跳动面试非常喜欢考算法题。

Leetcode官方的企业题库不仅付费，而且题量非常大。

因此，我从20年7月开始，手动整理牛客面经涉及的Leetcode算法题，并按照频度由高到低进行了排列。以下列出的250多道高频题目。

如果你想查看按部门、岗位查看高频算法题，或者查看其他大厂的题库，可以使用我开发的CodeTop：https://codetop.cc

字节跳动题库已覆盖抖音、飞书、架构、data、商业变现、懂车帝、电商、今日头条等20多个部门。

字节跳动高频题（更新至2021年4.10日）

题目 出现次数 链接
3. 无重复字符的最长子串 87 https://leetcode-cn.com/problems/longest-substring-without-repeating-characters
25. K 个一组翻转链表 71 https://leetcode-cn.com/problems/reverse-nodes-in-k-group
206. 反转链表 70 https://leetcode-cn.com/problems/reverse-linked-list
215. 数组中的第K个最大元素 68 https://leetcode-cn.com/problems/kth-largest-element-in-an-array
103. 二叉树的锯齿形层次遍历 53 https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal
15. 三数之和 53 https://leetcode-cn.com/problems/3sum
160. 相交链表 53 https://leetcode-cn.com/problems/intersection-of-two-linked-lists
146. LRU缓存机制 51 https://leetcode-cn.com/problems/lru-cache
121. 买卖股票的最佳时机 47 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock
1. 两数之和 43 https://leetcode-cn.com/problems/two-sum
236. 二叉树的最近公共祖先 35 https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree
53. 最大子序和 34 https://leetcode-cn.com/problems/maximum-subarray
415. 字符串相加 33 https://leetcode-cn.com/problems/add-strings
21. 合并两个有序链表 32 https://leetcode-cn.com/problems/merge-two-sorted-lists
42. 接雨水 31 https://leetcode-cn.com/problems/trapping-rain-water
199. 二叉树的右视图 30 https://leetcode-cn.com/problems/binary-tree-right-side-view
88. 合并两个有序数组 28 https://leetcode-cn.com/problems/merge-sorted-array
141. 环形链表 28 https://leetcode-cn.com/problems/linked-list-cycle
33. 搜索旋转排序数组 28 https://leetcode-cn.com/problems/search-in-rotated-sorted-array
54. 螺旋矩阵 28 https://leetcode-cn.com/problems/spiral-matrix
102. 二叉树的层序遍历 26 https://leetcode-cn.com/problems/binary-tree-level-order-traversal
20. 有效的括号 26 https://leetcode-cn.com/problems/valid-parentheses
105. 从前序与中序遍历序列构造二叉树 25 https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
200. 岛屿数量 25 https://leetcode-cn.com/problems/number-of-islands
46. 全排列 23 https://leetcode-cn.com/problems/permutations
142. 环形链表 II 22 https://leetcode-cn.com/problems/linked-list-cycle-ii
56. 合并区间 22 https://leetcode-cn.com/problems/merge-intervals
300. 最长上升子序列 22 https://leetcode-cn.com/problems/longest-increasing-subsequence
69. x 的平方根 22 https://leetcode-cn.com/problems/sqrtx
232. 用栈实现队列 21 https://leetcode-cn.com/problems/implement-queue-using-stacks
124. 二叉树中的最大路径和 21 https://leetcode-cn.com/problems/binary-tree-maximum-path-sum
23. 合并K个排序链表 21 https://leetcode-cn.com/problems/merge-k-sorted-lists
5. 最长回文子串 21 https://leetcode-cn.com/problems/longest-palindromic-substring
94. 二叉树的中序遍历 20 https://leetcode-cn.com/problems/binary-tree-inorder-traversal
155. 最小栈 20 https://leetcode-cn.com/problems/min-stack
143. 重排链表 20 https://leetcode-cn.com/problems/reorder-list
41. 缺失的第一个正数 19 https://leetcode-cn.com/problems/first-missing-positive
101. 对称二叉树 19 https://leetcode-cn.com/problems/symmetric-tree
113. 路径总和 II 19 https://leetcode-cn.com/problems/path-sum-ii
958. 二叉树的完全性检验 18 https://leetcode-cn.com/problems/check-completeness-of-a-binary-tree
112. 路径总和 17 https://leetcode-cn.com/problems/path-sum
70. 爬楼梯 17 https://leetcode-cn.com/problems/climbing-stairs
169. 多数元素 17 https://leetcode-cn.com/problems/majority-element
剑指 Offer 22. 链表中倒数第k个节点 17 https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof
98. 验证二叉搜索树 17 https://leetcode-cn.com/problems/validate-binary-search-tree
39. 组合总和 16 https://leetcode-cn.com/problems/combination-sum
补充题1. 排序奇升偶降链表 16 https://mp.weixin.qq.com/s/377FfqvpY8NwMInhpoDgsw
234. 回文链表 15 https://leetcode-cn.com/problems/palindrome-linked-list
110. 平衡二叉树 15 https://leetcode-cn.com/problems/balanced-binary-tree
543. 二叉树的直径 15 https://leetcode-cn.com/problems/diameter-of-binary-tree
2. 两数相加 15 https://leetcode-cn.com/problems/add-two-numbers
31. 下一个排列 15 https://leetcode-cn.com/problems/next-permutation
240. 搜索二维矩阵 II 15 https://leetcode-cn.com/problems/search-a-2d-matrix-ii
122. 买卖股票的最佳时机 II 15 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii
129. 求根到叶子节点数字之和 15 https://leetcode-cn.com/problems/sum-root-to-leaf-numbers
92. 反转链表 II 15 https://leetcode-cn.com/problems/reverse-linked-list-ii
718. 最长重复子数组 14 https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray
151. 翻转字符串里的单词 13 https://leetcode-cn.com/problems/reverse-words-in-a-string
64. 最小路径和 13 https://leetcode-cn.com/problems/minimum-path-sum
62. 不同路径 13 https://leetcode-cn.com/problems/unique-paths
104. 二叉树的最大深度 13 https://leetcode-cn.com/problems/maximum-depth-of-binary-tree
83. 删除排序链表中的重复元素 13 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list
162. 寻找峰值 13 https://leetcode-cn.com/problems/find-peak-element
226. 翻转二叉树 13 https://leetcode-cn.com/problems/invert-binary-tree
209. 长度最小的子数组 13 https://leetcode-cn.com/problems/minimum-size-subarray-sum
165. 比较版本号 13 https://leetcode-cn.com/problems/compare-version-numbers
518. 零钱兑换 II 12 https://leetcode-cn.com/problems/coin-change-2
76. 最小覆盖子串 12 https://leetcode-cn.com/problems/minimum-window-substring
32. 最长有效括号 12 https://leetcode-cn.com/problems/longest-valid-parentheses
93. 复原IP地址 12 https://leetcode-cn.com/problems/restore-ip-addresses
19. 删除链表的倒数第N个节点 12 https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list
4. 寻找两个正序数组的中位数 12 https://leetcode-cn.com/problems/median-of-two-sorted-arrays
48. 旋转图像 12 https://leetcode-cn.com/problems/rotate-image
78. 子集 11 https://leetcode-cn.com/problems/subsets
剑指 Offer 09. 用两个栈实现队列 11 https://leetcode-cn.com/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof
230. 二叉搜索树中第K小的元素 11 https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst
1143. 最长公共子序列 11 https://leetcode-cn.com/problems/longest-common-subsequence
322. 零钱兑换 11 https://leetcode-cn.com/problems/coin-change
695. 岛屿的最大面积 11 https://leetcode-cn.com/problems/max-area-of-island
144. 二叉树的前序遍历 11 https://leetcode-cn.com/problems/binary-tree-preorder-traversal
148. 排序链表 11 https://leetcode-cn.com/problems/sort-list
470. 用 Rand7() 实现 Rand10() 11 https://leetcode-cn.com/problems/implement-rand10-using-rand7
198. 打家劫舍 11 https://leetcode-cn.com/problems/house-robber
补充题4. 手撕快速排序 11 https://leetcode-cn.com/problems/sort-an-array
394. 字符串解码 10 https://leetcode-cn.com/problems/decode-string
72. 编辑距离 10 https://leetcode-cn.com/problems/edit-distance
224. 基本计算器 10 https://leetcode-cn.com/problems/basic-calculator
82. 删除排序链表中的重复元素 II 10 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii
剑指 Offer 36. 二叉搜索树与双向链表 9 https://leetcode-cn.com/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof
24. 两两交换链表中的节点 9 https://leetcode-cn.com/problems/swap-nodes-in-pairs
739. 每日温度 9 https://leetcode-cn.com/problems/daily-temperatures
79. 单词搜索 9 https://leetcode-cn.com/problems/word-search
239. 滑动窗口最大值 9 https://leetcode-cn.com/problems/sliding-window-maximum
补充题2. 圆环回原点问题 9 https://mp.weixin.qq.com/s/VnGFEWHeD3nh1n9JSDkVUg
862. 和至少为 K 的最短子数组 8 https://leetcode-cn.com/problems/shortest-subarray-with-sum-at-least-k
662. 二叉树最大宽度 8 https://leetcode-cn.com/problems/maximum-width-of-binary-tree
138. 复制带随机指针的链表 8 https://leetcode-cn.com/problems/copy-list-with-random-pointer
34. 在排序数组中查找元素的第一个和最后一个位置 8 https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array
440. 字典序的第K小数字 8 https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order
补充题9. 36进制加法 8 https://mp.weixin.qq.com/s/bgD1Q5lc92mX7RNS1L65qA
128. 最长连续序列 7 https://leetcode-cn.com/problems/longest-consecutive-sequence
468. 验证IP地址 7 https://leetcode-cn.com/problems/validate-ip-address
221. 最大正方形 7 https://leetcode-cn.com/problems/maximal-square
22. 括号生成 7 https://leetcode-cn.com/problems/generate-parentheses
剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 7 https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof
460. LFU缓存 7 https://leetcode-cn.com/problems/lfu-cache
179. 最大数 7 https://leetcode-cn.com/problems/largest-number
704. 二分查找 7 https://leetcode-cn.com/problems/binary-search
114. 二叉树展开为链表 7 https://leetcode-cn.com/problems/flatten-binary-tree-to-linked-list
剑指 Offer 27. 二叉树的镜像 7 https://leetcode-cn.com/problems/er-cha-shu-de-jing-xiang-lcof
59. 螺旋矩阵 II 7 https://leetcode-cn.com/problems/spiral-matrix-ii
287. 寻找重复数 7 https://leetcode-cn.com/problems/find-the-duplicate-number
11. 盛最多水的容器 7 https://leetcode-cn.com/problems/container-with-most-water
344. 反转字符串 6 https://leetcode-cn.com/problems/reverse-string
14. 最长公共前缀 6 https://leetcode-cn.com/problems/longest-common-prefix
剑指 Offer 61. 扑克牌中的顺子 6 https://leetcode-cn.com/problems/bu-ke-pai-zhong-de-shun-zi-lcof
剑指 Offer 54. 二叉搜索树的第k大节点 6 https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-di-kda-jie-dian-lcof
297. 二叉树的序列化与反序列化 6 https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree
8. 字符串转换整数 (atoi) 6 https://leetcode-cn.com/problems/string-to-integer-atoi
670. 最大交换 6 https://leetcode-cn.com/problems/maximum-swap
61. 旋转链表 6 https://leetcode-cn.com/problems/rotate-list
剑指 Offer 51. 数组中的逆序对 6 https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof
225. 用队列实现栈 6 https://leetcode-cn.com/problems/implement-stack-using-queues
补充题3. 求区间最小数乘区间和的最大值 6 https://mp.weixin.qq.com/s/ABNN4lJpvttulwWaUTgYZQ
补充题7. 木头切割问题 6 https://mp.weixin.qq.com/s/o-1VJO2TQZjC5ROmV7CReA
977. 有序数组的平方 5 https://leetcode-cn.com/problems/squares-of-a-sorted-array
108. 将有序数组转换为二叉搜索树 5 https://leetcode-cn.com/problems/convert-sorted-array-to-binary-search-tree
560. 和为K的子数组 5 https://leetcode-cn.com/problems/subarray-sum-equals-k
145. 二叉树的后序遍历 5 https://leetcode-cn.com/problems/binary-tree-postorder-traversal
283. 移动零 5 https://leetcode-cn.com/problems/move-zeroes
191. 位1的个数 5 https://leetcode-cn.com/problems/number-of-1-bits
189. 旋转数组 5 https://leetcode-cn.com/problems/rotate-array
125. 验证回文串 5 https://leetcode-cn.com/problems/valid-palindrome
剑指 Offer 62. 圆圈中最后剩下的数字 5 https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof
1047. 删除字符串中的所有相邻重复项 5 https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string
剑指 Offer 45. 把数组排成最小的数 4 https://leetcode-cn.com/problems/ba-shu-zu-pai-cheng-zui-xiao-de-shu-lcof
剑指 Offer 48. 最长不含重复字符的子字符串 4 https://leetcode-cn.com/problems/zui-chang-bu-han-zhong-fu-zi-fu-de-zi-zi-fu-chuan-lcof
680. 验证回文字符串 Ⅱ 4 https://leetcode-cn.com/problems/valid-palindrome-ii
328. 奇偶链表 4 https://leetcode-cn.com/problems/odd-even-linked-list
136. 只出现一次的数字 4 https://leetcode-cn.com/problems/single-number
剑指 Offer 11. 旋转数组的最小数字 4 https://leetcode-cn.com/problems/xuan-zhuan-shu-zu-de-zui-xiao-shu-zi-lcof
剑指 Offer 33. 二叉搜索树的后序遍历序列 4 https://leetcode-cn.com/problems/er-cha-sou-suo-shu-de-hou-xu-bian-li-xu-lie-lcof
509. 斐波那契数 4 https://leetcode-cn.com/problems/fibonacci-number
剑指 Offer 10- II. 青蛙跳台阶问题 4 https://leetcode-cn.com/problems/qing-wa-tiao-tai-jie-wen-ti-lcof
152. 乘积最大子数组 4 https://leetcode-cn.com/problems/maximum-product-subarray
40. 组合总和 II 4 https://leetcode-cn.com/problems/combination-sum-ii
71. 简化路径 4 https://leetcode-cn.com/problems/simplify-path
402. 移掉K位数字 4 https://leetcode-cn.com/problems/remove-k-digits
135. 分发糖果 4 https://leetcode-cn.com/problems/candy
26. 删除排序数组中的重复项 4 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array
329. 矩阵中的最长递增路径 4 https://leetcode-cn.com/problems/longest-increasing-path-in-a-matrix
227. 基本计算器 II 4 https://leetcode-cn.com/problems/basic-calculator-ii
456. 132模式 4 https://leetcode-cn.com/problems/132-pattern
528. 按权重随机选择 4 https://leetcode-cn.com/problems/random-pick-with-weight
242. 有效的字母异位词 4 https://leetcode-cn.com/problems/valid-anagram
443. 压缩字符串 4 https://leetcode-cn.com/problems/string-compression
75. 颜色分类 4 https://leetcode-cn.com/problems/sort-colors
剑指 Offer 52. 两个链表的第一个公共节点 3 https://leetcode-cn.com/problems/liang-ge-lian-biao-de-di-yi-ge-gong-gong-jie-dian-lcof
139. 单词拆分 3 https://leetcode-cn.com/problems/word-break
503. 下一个更大元素 II 3 https://leetcode-cn.com/problems/next-greater-element-ii
86. 分隔链表 3 https://leetcode-cn.com/problems/partition-list
347. 前 K 个高频元素 3 https://leetcode-cn.com/problems/top-k-frequent-elements
7. 整数反转 3 https://leetcode-cn.com/problems/reverse-integer
63. 不同路径 II 3 https://leetcode-cn.com/problems/unique-paths-ii
剑指 Offer 24. 反转链表 3 https://leetcode-cn.com/problems/fan-zhuan-lian-biao-lcof
264. 丑数 II 3 https://leetcode-cn.com/problems/ugly-number-ii
349. 两个数组的交集 3 https://leetcode-cn.com/problems/intersection-of-two-arrays
188. 买卖股票的最佳时机 IV 3 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iv
剑指 Offer 04. 二维数组中的查找 3 https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof
210. 课程表 II 3 https://leetcode-cn.com/problems/course-schedule-ii
49. 字母异位词分组 3 https://leetcode-cn.com/problems/group-anagrams
17. 电话号码的字母组合 3 https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number
498. 对角线遍历 3 https://leetcode-cn.com/problems/diagonal-traverse
97. 交错字符串 3 https://leetcode-cn.com/problems/interleaving-string
50. Pow(x, n) 3 https://leetcode-cn.com/problems/powx-n
16. 最接近的三数之和 3 https://leetcode-cn.com/problems/3sum-closest
134. 加油站 3 https://leetcode-cn.com/problems/gas-station
315. 计算右侧小于当前元素的个数 3 https://leetcode-cn.com/problems/count-of-smaller-numbers-after-self
120. 三角形最小路径和 3 https://leetcode-cn.com/problems/triangle
91. 解码方法 3 https://leetcode-cn.com/problems/decode-ways
1095. 山脉数组中查找目标值 3 https://leetcode-cn.com/problems/find-in-mountain-array
334. 递增的三元子序列 3 https://leetcode-cn.com/problems/increasing-triplet-subsequence
153. 寻找旋转排序数组中的最小值 3 https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array
80. 删除排序数组中的重复项 II 3 https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array-ii
剑指 Offer 46. 把数字翻译成字符串 3 https://leetcode-cn.com/problems/ba-shu-zi-fan-yi-cheng-zi-fu-chuan-lcof
84. 柱状图中最大的矩形 3 https://leetcode-cn.com/problems/largest-rectangle-in-histogram
剑指 Offer 10- I. 斐波那契数列 3 https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof
补充题5. 手撕归并排序 3 https://leetcode-cn.com/problems/sort-an-array
556. 下一个更大元素 III 3 https://leetcode-cn.com/problems/next-greater-element-iii
1201. 丑数 III 2 https://leetcode-cn.com/problems/ugly-number-iii
1254. 统计封闭岛屿的数目 2 https://leetcode-cn.com/problems/number-of-closed-islands
67. 二进制求和 2 https://leetcode-cn.com/problems/add-binary
190. 颠倒二进制位 2 https://leetcode-cn.com/problems/reverse-bits
572. 另一个树的子树 2 https://leetcode-cn.com/problems/subtree-of-another-tree
剑指 Offer 39. 数组中出现次数超过一半的数字 2 https://leetcode-cn.com/problems/shu-zu-zhong-chu-xian-ci-shu-chao-guo-yi-ban-de-shu-zi-lcof
405. 数字转换为十六进制数 2 https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal
剑指 Offer 07. 重建二叉树 2 https://leetcode-cn.com/problems/zhong-jian-er-cha-shu-lcof
257. 二叉树的所有路径 2 https://leetcode-cn.com/problems/binary-tree-paths
剑指 Offer 32 - III. 从上到下打印二叉树 III 2 https://leetcode-cn.com/problems/cong-shang-dao-xia-da-yin-er-cha-shu-iii-lcof
445. 两数相加 II 2 https://leetcode-cn.com/problems/add-two-numbers-ii
剑指 Offer 29. 顺时针打印矩阵 2 https://leetcode-cn.com/problems/shun-shi-zhen-da-yin-ju-zhen-lcof
剑指 Offer 38. 字符串的排列 2 https://leetcode-cn.com/problems/zi-fu-chuan-de-pai-lie-lcof
701. 二叉搜索树中的插入操作 2 https://leetcode-cn.com/problems/insert-into-a-binary-search-tree
421. 数组中两个数的最大异或值 2 https://leetcode-cn.com/problems/maximum-xor-of-two-numbers-in-an-array
99. 恢复二叉搜索树 2 https://leetcode-cn.com/problems/recover-binary-search-tree
523. 连续的子数组和 2 https://leetcode-cn.com/problems/continuous-subarray-sum
164. 最大间距 2 https://leetcode-cn.com/problems/maximum-gap
面试题 03.05. 栈排序 2 https://leetcode-cn.com/problems/sort-of-stacks-lcci
208. 实现 Trie (前缀树) 2 https://leetcode-cn.com/problems/implement-trie-prefix-tree
剑指 Offer 19. 正则表达式匹配 2 https://leetcode-cn.com/problems/zheng-ze-biao-da-shi-pi-pei-lcof
剑指 Offer 59 - II. 队列的最大值 2 https://leetcode-cn.com/problems/dui-lie-de-zui-da-zhi-lcof
895. 最大频率栈 2 https://leetcode-cn.com/problems/maximum-frequency-stack
557. 反转字符串中的单词 III 2 https://leetcode-cn.com/problems/reverse-words-in-a-string-iii
398. 随机数索引 2 https://leetcode-cn.com/problems/random-pick-index
268. 缺失数字 2 https://leetcode-cn.com/problems/missing-number
85. 最大矩形 2 https://leetcode-cn.com/problems/maximal-rectangle
1363. 形成三的最大倍数 2 https://leetcode-cn.com/problems/largest-multiple-of-three
107. 二叉树的层次遍历 II 2 https://leetcode-cn.com/problems/binary-tree-level-order-traversal-ii
44. 通配符匹配 2 https://leetcode-cn.com/problems/wildcard-matching
45. 跳跃游戏 II 2 https://leetcode-cn.com/problems/jump-game-ii
416. 分割等和子集 2 https://leetcode-cn.com/problems/partition-equal-subset-sum
238. 除自身以外数组的乘积 2 https://leetcode-cn.com/problems/product-of-array-except-self
807. 保持城市天际线 2 https://leetcode-cn.com/problems/max-increase-to-keep-city-skyline
123. 买卖股票的最佳时机 III 2 https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii
340. 至多包含 K 个不同字符的最长子串 2 https://leetcode-cn.com/problems/longest-substring-with-at-most-k-distinct-characters
154. 寻找旋转排序数组中的最小值 II 2 https://leetcode-cn.com/problems/find-minimum-in-rotated-sorted-array-ii
668. 乘法表中第k小的数 2 https://leetcode-cn.com/problems/kth-smallest-number-in-multiplication-table
77. 组合 2 https://leetcode-cn.com/problems/combinations
213. 打家劫舍 II 2 https://leetcode-cn.com/problems/house-robber-ii
438. 找到字符串中所有字母异位词 2 https://leetcode-cn.com/problems/find-all-anagrams-in-a-string
147. 对链表进行插入排序 2 https://leetcode-cn.com/problems/insertion-sort-list
785. 判断二分图 2 https://leetcode-cn.com/problems/is-graph-bipartite
525. 连续数组 2 https://leetcode-cn.com/problems/contiguous-array
722. 删除注释 2 https://leetcode-cn.com/problems/remove-comments
260. 只出现一次的数字 III 2 https://leetcode-cn.com/problems/single-number-iii
60. 第k个排列 2 https://leetcode-cn.com/problems/permutation-sequence
404. 左叶子之和 2 https://leetcode-cn.com/problems/sum-of-left-leaves
10. 正则表达式匹配 2 https://leetcode-cn.com/problems/regular-expression-matching
459. 重复的子字符串 2 https://leetcode-cn.com/problems/repeated-substring-pattern
96. 不同的二叉搜索树 2 https://leetcode-cn.com/problems/unique-binary-search-trees
43. 字符串相乘 2 https://leetcode-cn.com/problems/multiply-strings
974. 和可被 K 整除的子数组 2 https://leetcode-cn.com/problems/subarray-sums-divisible-by-k
18. 四数之和 2 https://leetcode-cn.com/problems/4sum
647. 回文子串 2 https://leetcode-cn.com/problems/palindromic-substrings
补充题10. 36进制减法 2
补充题6. 手撕堆排序 2 https://leetcode-cn.com/problems/sort-an-array
74. 搜索二维矩阵 2 https://leetcode-cn.com/problems/search-a-2d-matrix
剑指 Offer 53 - I. 在排序数组中查找数字 I 2 https://leetcode-cn.com/problems/zai-pai-xu-shu-zu-zhong-cha-zhao-shu-zi-lcof
补充题14. 阿拉伯数字转中文数字 2
429. N叉树的层序遍历 2 https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal
剑指 Offer 03. 数组中重复的数字 2 https://leetcode-cn.com/problems/shu-zu-zhong-zhong-fu-de-shu-zi-lcof
106. 从中序与后序遍历序列构造二叉树 2 https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal

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