ℹ题目源于（2019.04.06~2020.08.07）的牛客面经，每一题目的出处与原始牛客链接对应关系见[issues](https://github.com/afatcoder/LeetcodeTop/issues)

| 题目 | 出现次数 | 链接 |

|------------------------------|------|----------------------------------------------------------------------------------------------------|

| 215. 数组中的第K个最大元素 | 6 | https://leetcode-cn.com/problems/kth-largest-element-in-an-array |

| 124. 二叉树中的最大路径和 | 4 | https://leetcode-cn.com/problems/binary-tree-maximum-path-sum |

| 468. 验证IP地址 | 3 | https://leetcode-cn.com/problems/validate-ip-address |

| 236. 二叉树的最近公共祖先 | 3 | https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree |

| 206. 反转链表 | 3 | https://leetcode-cn.com/problems/reverse-linked-list |

| 91. 解码方法 | 3 | https://leetcode-cn.com/problems/decode-ways |

| 94. 二叉树的中序遍历 | 3 | https://leetcode-cn.com/problems/binary-tree-inorder-traversal |

| 15. 三数之和 | 3 | https://leetcode-cn.com/problems/3sum |

| 121. 买卖股票的最佳时机 | 3 | https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock |

| 48. 旋转图像 | 3 | https://leetcode-cn.com/problems/rotate-image |

| 543. 二叉树的直径 | 3 | https://leetcode-cn.com/problems/diameter-of-binary-tree |

| 53. 最大子序和 | 3 | https://leetcode-cn.com/problems/maximum-subarray |

| 4. 寻找两个正序数组的中位数 | 2 | https://leetcode-cn.com/problems/median-of-two-sorted-arrays |

| 110. 平衡二叉树 | 2 | https://leetcode-cn.com/problems/balanced-binary-tree |

| 146. LRU缓存机制 | 2 | https://leetcode-cn.com/problems/lru-cache |

| 103. 二叉树的锯齿形层次遍历 | 2 | https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal |

| 450. 删除二叉搜索树中的节点 | 2 | https://leetcode-cn.com/problems/delete-node-in-a-bst |

| 415. 字符串相加 | 2 | https://leetcode-cn.com/problems/add-strings |

| 62. 不同路径 | 2 | https://leetcode-cn.com/problems/unique-paths |

| 22. 括号生成 | 2 | https://leetcode-cn.com/problems/generate-parentheses |

| 1. 两数之和 | 2 | https://leetcode-cn.com/problems/two-sum |

| 79. 单词搜索 | 2 | https://leetcode-cn.com/problems/word-search |

| 200. 岛屿数量 | 2 | https://leetcode-cn.com/problems/number-of-islands |

| 89. 格雷编码 | 2 | https://leetcode-cn.com/problems/gray-code |

| 98. 验证二叉搜索树 | 2 | https://leetcode-cn.com/problems/validate-binary-search-tree |

| 剑指 Offer 46. 把数字翻译成字符串 | 1 | 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 | 1 | https://leetcode-cn.com/problems/largest-rectangle-in-histogram |

| 120. 三角形最小路径和 | 1 | https://leetcode-cn.com/problems/triangle |

| 5. 最长回文子串 | 1 | https://leetcode-cn.com/problems/longest-palindromic-substring |

| 867. 转置矩阵 | 1 | https://leetcode-cn.com/problems/transpose-matrix |

| 560. 和为K的子数组 | 1 | https://leetcode-cn.com/problems/subarray-sum-equals-k |

| 986. 区间列表的交集 | 1 | https://leetcode-cn.com/problems/interval-list-intersections |

| 78. 子集 | 1 | https://leetcode-cn.com/problems/subsets |

| 907. 子数组的最小值之和 | 1 | https://leetcode-cn.com/problems/sum-of-subarray-minimums |

| 162. 寻找峰值 | 1 | https://leetcode-cn.com/problems/find-peak-element |

| 547. 朋友圈 | 1 | https://leetcode-cn.com/problems/friend-circles |

| 1013. 将数组分成和相等的三个部分 | 1 | https://leetcode-cn.com/problems/partition-array-into-three-parts-with-equal-sum |

| 34. 在排序数组中查找元素的第一个和最后一个位置 | 1 | https://leetcode-cn.com/problems/find-first-and-last-position-of-element-in-sorted-array |

| 142. 环形链表 II | 1 | https://leetcode-cn.com/problems/linked-list-cycle-ii |

| 572. 另一个树的子树 | 1 | https://leetcode-cn.com/problems/subtree-of-another-tree |

| 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 |

| 704. 二分查找 | 1 | https://leetcode-cn.com/problems/binary-search |

| 151. 翻转字符串里的单词 | 1 | https://leetcode-cn.com/problems/reverse-words-in-a-string |

| 171. Excel表列序号 | 1 | https://leetcode-cn.com/problems/excel-sheet-column-number |

| 39. 组合总和 | 1 | https://leetcode-cn.com/problems/combination-sum |

| 150. 逆波兰表达式求值 | 1 | https://leetcode-cn.com/problems/evaluate-reverse-polish-notation |

| 283. 移动零 | 1 | https://leetcode-cn.com/problems/move-zeroes |

| 767. 重构字符串 | 1 | https://leetcode-cn.com/problems/reorganize-string |

| 10. 正则表达式匹配 | 1 | https://leetcode-cn.com/problems/regular-expression-matching |

| 459. 重复的子字符串 | 1 | https://leetcode-cn.com/problems/repeated-substring-pattern |

| 973. 最接近原点的 K 个点 | 1 | https://leetcode-cn.com/problems/k-closest-points-to-origin |

| 3. 无重复字符的最长子串 | 1 | https://leetcode-cn.com/problems/longest-substring-without-repeating-characters |

| 72. 编辑距离 | 1 | https://leetcode-cn.com/problems/edit-distance |

| 剑指 Offer 21. 调整数组顺序使奇数位于偶数前面 | 1 | https://leetcode-cn.com/problems/diao-zheng-shu-zu-shun-xu-shi-qi-shu-wei-yu-ou-shu-qian-mian-lcof |

| 426. 将二叉搜索树转化为排序的双向链表 | 1 | https://leetcode-cn.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list |

| 887. 鸡蛋掉落 | 1 | https://leetcode-cn.com/problems/super-egg-drop |

| 剑指 Offer 26. 树的子结构 | 1 | https://leetcode-cn.com/problems/shu-de-zi-jie-gou-lcof |

| 328. 奇偶链表 | 1 | https://leetcode-cn.com/problems/odd-even-linked-list |

| 137. 只出现一次的数字 II | 1 | https://leetcode-cn.com/problems/single-number-ii |

| 155. 最小栈 | 1 | https://leetcode-cn.com/problems/min-stack |

| 剑指 Offer 52. 两个链表的第一个公共节点 | 1 | https://leetcode-cn.com/problems/liang-ge-lian-biao-de-di-yi-ge-gong-gong-jie-dian-lcof |

| 1375. 灯泡开关 III | 1 | https://leetcode-cn.com/problems/bulb-switcher-iii |

| 662. 二叉树最大宽度 | 1 | https://leetcode-cn.com/problems/maximum-width-of-binary-tree |

| 76. 最小覆盖子串 | 1 | https://leetcode-cn.com/problems/minimum-window-substring |

| 449. 序列化和反序列化二叉搜索树 | 1 | https://leetcode-cn.com/problems/serialize-and-deserialize-bst |

| 47. 全排列 II | 1 | https://leetcode-cn.com/problems/permutations-ii |

| 300. 最长上升子序列 | 1 | https://leetcode-cn.com/problems/longest-increasing-subsequence |

| 152. 乘积最大子数组 | 1 | https://leetcode-cn.com/problems/maximum-product-subarray |

| 44. 通配符匹配 | 1 | https://leetcode-cn.com/problems/wildcard-matching |

| 739. 每日温度 | 1 | https://leetcode-cn.com/problems/daily-temperatures |

| 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 |

| 20. 有效的括号 | 1 | https://leetcode-cn.com/problems/valid-parentheses |

| 207. 课程表 | 1 | https://leetcode-cn.com/problems/course-schedule |

| 700. 二叉搜索树中的搜索 | 1 | https://leetcode-cn.com/problems/search-in-a-binary-search-tree |

| 701. 二叉搜索树中的插入操作 | 1 | https://leetcode-cn.com/problems/insert-into-a-binary-search-tree |

| 1312. 让字符串成为回文串的最少插入次数 | 1 | https://leetcode-cn.com/problems/minimum-insertion-steps-to-make-a-string-palindrome |

| 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 |

| 139. 单词拆分 | 1 | https://leetcode-cn.com/problems/word-break |

| 557. 反转字符串中的单词 III | 1 | https://leetcode-cn.com/problems/reverse-words-in-a-string-iii |

| 60. 第k个排列 | 1 | https://leetcode-cn.com/problems/permutation-sequence |

| 剑指 Offer 04. 二维数组中的查找 | 1 | https://leetcode-cn.com/problems/er-wei-shu-zu-zhong-de-cha-zhao-lcof |