|
1 | 1 | #数据研发 |
2 | | -若想按部门/难度/题型筛选题目，可以在[CodeTop](https://codetop.cc)查询 |
| 2 | +我开发的[CodeTop题库](https://codetop.cc)可以按照部门、难度筛选，比markdown更方便查询高频题 |
| 3 | + |
3 | 4 | |题目|出现次数|链接| |
4 | 5 | |-|-|-| |
| 6 | +|101. 对称二叉树|3|https://leetcode-cn.com/problems/symmetric-tree| |
5 | 7 | |25. K 个一组翻转链表|3|https://leetcode-cn.com/problems/reverse-nodes-in-k-group| |
6 | 8 | |232. 用栈实现队列|3|https://leetcode-cn.com/problems/implement-queue-using-stacks| |
| 9 | +|200. 岛屿数量|2|https://leetcode-cn.com/problems/number-of-islands| |
| 10 | +|64. 最小路径和|2|https://leetcode-cn.com/problems/minimum-path-sum| |
7 | 11 | |补充题1. 排序奇升偶降链表|2|https://mp.weixin.qq.com/s/377FfqvpY8NwMInhpoDgsw| |
| 12 | +|146. LRU缓存机制|2|https://leetcode-cn.com/problems/lru-cache| |
8 | 13 | |98. 验证二叉搜索树|2|https://leetcode-cn.com/problems/validate-binary-search-tree| |
9 | 14 | |121. 买卖股票的最佳时机|2|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock| |
10 | 15 | |53. 最大子序和|2|https://leetcode-cn.com/problems/maximum-subarray| |
11 | | -|122. 买卖股票的最佳时机 II|1|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii| |
12 | | -|148. 排序链表|1|https://leetcode-cn.com/problems/sort-list| |
13 | | -|138. 复制带随机指针的链表|1|https://leetcode-cn.com/problems/copy-list-with-random-pointer| |
14 | | -|704. 二分查找|1|https://leetcode-cn.com/problems/binary-search| |
15 | | -|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| |
16 | | -|剑指 Offer 53 - I. 在排序数组中查找数字 I|1|https://leetcode-cn.com/problems/zai-pai-xu-shu-zu-zhong-cha-zhao-shu-zi-lcof| |
17 | | -|141. 环形链表|1|https://leetcode-cn.com/problems/linked-list-cycle| |
18 | | -|94. 二叉树的中序遍历|1|https://leetcode-cn.com/problems/binary-tree-inorder-traversal| |
19 | | -|补充题6. 手撕堆排序|1|https://leetcode-cn.com/problems/sort-an-array| |
20 | 16 | |103. 二叉树的锯齿形层次遍历|1|https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal| |
21 | | -|113. 路径总和 II|1|https://leetcode-cn.com/problems/path-sum-ii| |
22 | | -|146. LRU缓存机制|1|https://leetcode-cn.com/problems/lru-cache| |
23 | | -|69. x 的平方根|1|https://leetcode-cn.com/problems/sqrtx| |
24 | 17 | |611. 有效三角形的个数|1|https://leetcode-cn.com/problems/valid-triangle-number| |
| 18 | +|补充题6. 手撕堆排序|1|https://leetcode-cn.com/problems/sort-an-array| |
| 19 | +|94. 二叉树的中序遍历|1|https://leetcode-cn.com/problems/binary-tree-inorder-traversal| |
| 20 | +|141. 环形链表|1|https://leetcode-cn.com/problems/linked-list-cycle| |
| 21 | +|剑指 Offer 53 - I. 在排序数组中查找数字 I|1|https://leetcode-cn.com/problems/zai-pai-xu-shu-zu-zhong-cha-zhao-shu-zi-lcof| |
| 22 | +|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| |
| 23 | +|704. 二分查找|1|https://leetcode-cn.com/problems/binary-search| |
| 24 | +|122. 买卖股票的最佳时机 II|1|https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii| |
| 25 | +|69. x 的平方根|1|https://leetcode-cn.com/problems/sqrtx| |
| 26 | +|148. 排序链表|1|https://leetcode-cn.com/problems/sort-list| |
25 | 27 | |142. 环形链表 II|1|https://leetcode-cn.com/problems/linked-list-cycle-ii| |
26 | 28 | |剑指 Offer 51. 数组中的逆序对|1|https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof| |
27 | 29 | |43. 字符串相乘|1|https://leetcode-cn.com/problems/multiply-strings| |
28 | 30 | |补充题14. 阿拉伯数字转中文数字|1|| |
29 | | -|206. 反转链表|1|https://leetcode-cn.com/problems/reverse-linked-list| |
| 31 | +|16. 最接近的三数之和|1|https://leetcode-cn.com/problems/3sum-closest| |
| 32 | +|102. 二叉树的层序遍历|1|https://leetcode-cn.com/problems/binary-tree-level-order-traversal| |
| 33 | +|240. 搜索二维矩阵 II|1|https://leetcode-cn.com/problems/search-a-2d-matrix-ii| |
30 | 34 | |剑指 Offer 41. 数据流中的中位数|1|https://leetcode-cn.com/problems/shu-ju-liu-zhong-de-zhong-wei-shu-lcof| |
31 | 35 | |112. 路径总和|1|https://leetcode-cn.com/problems/path-sum| |
32 | 36 | |3. 无重复字符的最长子串|1|https://leetcode-cn.com/problems/longest-substring-without-repeating-characters| |
33 | 37 | |剑指 Offer 59 - II. 队列的最大值|1|https://leetcode-cn.com/problems/dui-lie-de-zui-da-zhi-lcof| |
34 | | -|101. 对称二叉树|1|https://leetcode-cn.com/problems/symmetric-tree| |
35 | 38 | |297. 二叉树的序列化与反序列化|1|https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree| |
36 | 39 | |92. 反转链表 II|1|https://leetcode-cn.com/problems/reverse-linked-list-ii| |
37 | 40 | |226. 翻转二叉树|1|https://leetcode-cn.com/problems/invert-binary-tree| |
38 | 41 | |440. 字典序的第K小数字|1|https://leetcode-cn.com/problems/k-th-smallest-in-lexicographical-order| |
39 | | -|143. 重排链表|1|https://leetcode-cn.com/problems/reorder-list| |
| 42 | +|206. 反转链表|1|https://leetcode-cn.com/problems/reverse-linked-list| |
40 | 43 | |42. 接雨水|1|https://leetcode-cn.com/problems/trapping-rain-water| |
41 | | -|240. 搜索二维矩阵 II|1|https://leetcode-cn.com/problems/search-a-2d-matrix-ii| |
| 44 | +|138. 复制带随机指针的链表|1|https://leetcode-cn.com/problems/copy-list-with-random-pointer| |
42 | 45 | |60. 第k个排列|1|https://leetcode-cn.com/problems/permutation-sequence| |
43 | 46 | |516. 最长回文子序列|1|https://leetcode-cn.com/problems/longest-palindromic-subsequence| |
44 | 47 | |718. 最长重复子数组|1|https://leetcode-cn.com/problems/maximum-length-of-repeated-subarray| |
45 | 48 | |5. 最长回文子串|1|https://leetcode-cn.com/problems/longest-palindromic-substring| |
46 | 49 | |155. 最小栈|1|https://leetcode-cn.com/problems/min-stack| |
47 | 50 | |33. 搜索旋转排序数组|1|https://leetcode-cn.com/problems/search-in-rotated-sorted-array| |
| 51 | +|113. 路径总和 II|1|https://leetcode-cn.com/problems/path-sum-ii| |
| 52 | +|143. 重排链表|1|https://leetcode-cn.com/problems/reorder-list| |
48 | 53 | |1201. 丑数 III|1|https://leetcode-cn.com/problems/ugly-number-iii| |