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March 6, 2021 · View on GitHub

题目出现次数链接
206. 反转链表15https://leetcode-cn.com/problems/reverse-linked-list
160. 相交链表8https://leetcode-cn.com/problems/intersection-of-two-linked-lists
补充题4. 手撕快速排序7
146. LRU缓存机制7https://leetcode-cn.com/problems/lru-cache
21. 合并两个有序链表7https://leetcode-cn.com/problems/merge-two-sorted-lists
215. 数组中的第K个最大元素7https://leetcode-cn.com/problems/kth-largest-element-in-an-array
88. 合并两个有序数组6https://leetcode-cn.com/problems/merge-sorted-array
141. 环形链表5https://leetcode-cn.com/problems/linked-list-cycle
92. 反转链表 II5https://leetcode-cn.com/problems/reverse-linked-list-ii
151. 翻转字符串里的单词5https://leetcode-cn.com/problems/reverse-words-in-a-string
2. 两数相加5https://leetcode-cn.com/problems/add-two-numbers
3. 无重复字符的最长子串5https://leetcode-cn.com/problems/longest-substring-without-repeating-characters
155. 最小栈4https://leetcode-cn.com/problems/min-stack
144. 二叉树的前序遍历4https://leetcode-cn.com/problems/binary-tree-preorder-traversal
136. 只出现一次的数字4https://leetcode-cn.com/problems/single-number
34. 在排序数组中查找元素的第一个和最后一个位置4https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array
20. 有效的括号4https://leetcode-cn.com/problems/valid-parentheses
148. 排序链表4https://leetcode-cn.com/problems/sort-list
24. 两两交换链表中的节点4https://leetcode-cn.com/problems/swap-nodes-in-pairs
415. 字符串相加4https://leetcode-cn.com/problems/add-strings
142. 环形链表 II3https://leetcode-cn.com/problems/linked-list-cycle-ii
46. 全排列3https://leetcode-cn.com/problems/permutations
剑指 Offer 10- II. 青蛙跳台阶问题3https://leetcode-cn.com/problems/qing-wa-tiao-tai-jie-wen-ti-lcof
剑指 Offer 22. 链表中倒数第k个节点3https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof
150. 逆波兰表达式求值3https://leetcode-cn.com/problems/evaluate-reverse-polish-notation
94. 二叉树的中序遍历3https://leetcode-cn.com/problems/binary-tree-inorder-traversal
128. 最长连续序列3https://leetcode-cn.com/problems/longest-consecutive-sequence
补充题8. 计算数组的小和3https://mp.weixin.qq.com/s/0ih4W6nawzFUPSj3GOnYTQ
121. 买卖股票的最佳时机3https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock
补充题5. 手撕归并排序3
69. x 的平方根3https://leetcode-cn.com/problems/sqrtx
103. 二叉树的锯齿形层次遍历3https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal
102. 二叉树的层序遍历3https://leetcode-cn.com/problems/binary-tree-level-order-traversal
剑指 Offer 51. 数组中的逆序对3https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof
剑指 Offer 21. 调整数组顺序使奇数位于偶数前面3https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof
76. 最小覆盖子串3https://leetcode-cn.com/problems/minimum-window-substring
15. 三数之和2https://leetcode-cn.com/problems/3sum
145. 二叉树的后序遍历2https://leetcode-cn.com/problems/binary-tree-postorder-traversal
543. 二叉树的直径2https://leetcode-cn.com/problems/diameter-of-binary-tree
845. 数组中的最长山脉2https://leetcode-cn.com/problems/longest-mountain-in-array
剑指 Offer 18. 删除链表的节点2https://leetcode-cn.com/problems/shan-chu-lian-biao-de-jie-dian-lcof
1143. 最长公共子序列2https://leetcode-cn.com/problems/longest-common-subsequence
剑指 Offer 19. 正则表达式匹配2https://leetcode-cn.com/problems/zheng-ze-biao-da-shi-pi-pei-lcof
509. 斐波那契数2https://leetcode-cn.com/problems/fibonacci-number
226. 翻转二叉树2https://leetcode-cn.com/problems/invert-binary-tree
93. 复原IP地址2https://leetcode-cn.com/problems/restore-ip-addresses
1047. 删除字符串中的所有相邻重复项2https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string
43. 字符串相乘2https://leetcode-cn.com/problems/multiply-strings
113. 路径总和 II2https://leetcode-cn.com/problems/path-sum-ii
718. 最长重复子数组2https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray
剑指 Offer 55 - I. 二叉树的深度2https://leetcode-cn.com/problems/er-cha-shu-de-shen-du-lcof
78. 子集2https://leetcode-cn.com/problems/subsets
498. 对角线遍历2https://leetcode-cn.com/problems/diagonal-traverse
122. 买卖股票的最佳时机 II2https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii
剑指 Offer 36. 二叉搜索树与双向链表2https://leetcode-cn.com/problems/er-cha-sou-suo-shu-yu-shuang-xiang-lian-biao-lcof
200. 岛屿数量2https://leetcode-cn.com/problems/number-of-islands
33. 搜索旋转排序数组2https://leetcode-cn.com/problems/search-in-rotated-sorted-array
54. 螺旋矩阵2https://leetcode-cn.com/problems/spiral-matrix
225. 用队列实现栈2https://leetcode-cn.com/problems/implement-stack-using-queues
23. 合并K个排序链表2https://leetcode-cn.com/problems/merge-k-sorted-lists
104. 二叉树的最大深度2https://leetcode-cn.com/problems/maximum-depth-of-binary-tree
318. 最大单词长度乘积1https://leetcode-cn.com/problems/maximum-product-of-word-lengths
321. 拼接最大数1https://leetcode-cn.com/problems/create-maximum-number
面试题 17.01. 不用加号的加法1https://leetcode-cn.com/problems/add-without-plus-lcci
468. 验证IP地址1https://leetcode-cn.com/problems/validate-ip-address
16. 最接近的三数之和1https://leetcode-cn.com/problems/3sum-closest
239. 滑动窗口最大值1https://leetcode-cn.com/problems/sliding-window-maximum
470. 用 Rand7() 实现 Rand10()1https://leetcode-cn.com/problems/implement-rand10-using-rand7
8. 字符串转换整数 (atoi)1https://leetcode-cn.com/problems/string-to-integer-atoi
剑指 Offer 24. 反转链表1https://leetcode-cn.com/problems/fan-zhuan-lian-biao-lcof
67. 二进制求和1https://leetcode-cn.com/problems/add-binary
450. 删除二叉搜索树中的节点1https://leetcode-cn.com/problems/delete-node-in-a-bst
322. 零钱兑换1https://leetcode-cn.com/problems/coin-change
220. 存在重复元素 III1https://leetcode-cn.com/problems/contains-duplicate-iii
剑指 Offer 04. 二维数组中的查找1https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof
48. 旋转图像1https://leetcode-cn.com/problems/rotate-image
337. 打家劫舍 III1https://leetcode-cn.com/problems/house-robber-iii
191. 位1的个数1https://leetcode-cn.com/problems/number-of-1-bits
22. 括号生成1https://leetcode-cn.com/problems/generate-parentheses
5. 最长回文子串1https://leetcode-cn.com/problems/longest-palindromic-substring
224. 基本计算器1https://leetcode-cn.com/problems/basic-calculator
701. 二叉搜索树中的插入操作1https://leetcode-cn.com/problems/insert-into-a-binary-search-tree
111. 二叉树的最小深度1https://leetcode-cn.com/problems/minimum-depth-of-binary-tree
110. 平衡二叉树1https://leetcode-cn.com/problems/balanced-binary-tree
210. 课程表 II1https://leetcode-cn.com/problems/course-schedule-ii
480. 滑动窗口中位数1https://leetcode-cn.com/problems/sliding-window-median
137. 只出现一次的数字 II1https://leetcode-cn.com/problems/single-number-ii
剑指 Offer 41. 数据流中的中位数1https://leetcode-cn.com/problems/shu-ju-liu-zhong-de-zhong-wei-shu-lcof
42. 接雨水1https://leetcode-cn.com/problems/trapping-rain-water
82. 删除排序链表中的重复元素 II1https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list-ii
230. 二叉搜索树中第K小的元素1https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst
剑指 Offer 10- I. 斐波那契数列1https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof
169. 多数元素1https://leetcode-cn.com/problems/majority-element
59. 螺旋矩阵 II1https://leetcode-cn.com/problems/spiral-matrix-ii
74. 搜索二维矩阵1https://leetcode-cn.com/problems/search-a-2d-matrix
236. 二叉树的最近公共祖先1https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree
1. 两数之和1https://leetcode-cn.com/problems/two-sum
75. 颜色分类1https://leetcode-cn.com/problems/sort-colors
207. 课程表1https://leetcode-cn.com/problems/course-schedule
64. 最小路径和1https://leetcode-cn.com/problems/minimum-path-sum
1156. 单字符重复子串的最大长度1https://leetcode-cn.com/problems/swap-for-longest-repeated-character-substring
剑指 Offer 43. 1～n整数中1出现的次数1https://leetcode-cn.com/problems/1nzheng-shu-zhong-1chu-xian-de-ci-shu-lcof
14. 最长公共前缀1https://leetcode-cn.com/problems/longest-common-prefix
面试题 16.06. 最小差1https://leetcode-cn.com/problems/smallest-difference-lcci
1493. 删掉一个元素以后全为 1 的最长子数组1https://leetcode-cn.com/problems/longest-subarray-of-1s-after-deleting-one-element
剑指 Offer 09. 用两个栈实现队列1https://leetcode-cn.com/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof
1027. 最长等差数列1https://leetcode-cn.com/problems/longest-arithmetic-subsequence
1464. 数组中两元素的最大乘积1https://leetcode-cn.com/problems/maximum-product-of-two-elements-in-an-array
235. 二叉搜索树的最近公共祖先1https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree
204. 计数质数1https://leetcode-cn.com/problems/count-primes
83. 删除排序链表中的重复元素1https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list
958. 二叉树的完全性检验1https://leetcode-cn.com/problems/check-completeness-of-a-binary-tree
312. 戳气球1https://leetcode-cn.com/problems/burst-balloons
剑指 Offer 25. 合并两个排序的链表1https://leetcode-cn.com/problems/he-bing-liang-ge-pai-xu-de-lian-biao-lcof
9. 回文数1https://leetcode-cn.com/problems/palindrome-number
25. K 个一组翻转链表1https://leetcode-cn.com/problems/reverse-nodes-in-k-group
199. 二叉树的右视图1https://leetcode-cn.com/problems/binary-tree-right-side-view
240. 搜索二维矩阵 II1https://leetcode-cn.com/problems/search-a-2d-matrix-ii
1312. 让字符串成为回文串的最少插入次数1https://leetcode-cn.com/problems/minimum-insertion-steps-to-make-a-string-palindrome
6. Z 字形变换1https://leetcode-cn.com/problems/zigzag-conversion
189. 旋转数组1https://leetcode-cn.com/problems/rotate-array
19. 删除链表的倒数第N个节点1https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list
53. 最大子序和1https://leetcode-cn.com/problems/maximum-subarray
232. 用栈实现队列1https://leetcode-cn.com/problems/implement-queue-using-stacks
572. 另一个树的子树1https://leetcode-cn.com/problems/subtree-of-another-tree
704. 二分查找1https://leetcode-cn.com/problems/binary-search
238. 除自身以外数组的乘积1https://leetcode-cn.com/problems/product-of-array-except-self
剑指 Offer 42. 连续子数组的最大和1https://leetcode-cn.com/problems/lian-xu-zi-shu-zu-de-zui-da-he-lcof
138. 复制带随机指针的链表1https://leetcode-cn.com/problems/copy-list-with-random-pointer
剑指 Offer 32 - III. 从上到下打印二叉树 III1https://leetcode-cn.com/problems/cong-shang-dao-xia-da-yin-er-cha-shu-iii-lcof
129. 求根到叶子节点数字之和1https://leetcode-cn.com/problems/sum-root-to-leaf-numbers
101. 对称二叉树1https://leetcode-cn.com/problems/symmetric-tree
540. 有序数组中的单一元素1https://leetcode-cn.com/problems/single-element-in-a-sorted-array
剑指 Offer 12. 矩阵中的路径1https://leetcode-cn.com/problems/ju-zhen-zhong-de-lu-jing-lcof
208. 实现 Trie (前缀树)1https://leetcode-cn.com/problems/implement-trie-prefix-tree
剑指 Offer 40. 最小的k个数1https://leetcode-cn.com/problems/zui-xiao-de-kge-shu-lcof
40. 组合总和 II1https://leetcode-cn.com/problems/combination-sum-ii