| [28. Find the Index of the First Occurrence in a String](https://leetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/) | [28. 找出字符串中第一个匹配项的下标](https://leetcode.cn/problems/find-the-index-of-the-first-occurrence-in-a-string/) | 🟠
| [1038. Binary Search Tree to Greater Sum Tree](https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree/) | [1038. 把二叉搜索树转换为累加树](https://leetcode.cn/problems/binary-search-tree-to-greater-sum-tree/) | 🟠
| [1038. Binary Search Tree to Greater Sum Tree](https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree/) | [1038. 从二叉搜索树到更大和树](https://leetcode.cn/problems/binary-search-tree-to-greater-sum-tree/) | 🟠
| [230. Kth Smallest Element in a BST](https://leetcode.com/problems/kth-smallest-element-in-a-bst/) | [230. 二叉搜索树中第K小的元素](https://leetcode.cn/problems/kth-smallest-element-in-a-bst/) | 🟠
| [1315. Sum of Nodes with Even-Valued Grandparent](https://leetcode.com/problems/sum-of-nodes-with-even-valued-grandparent/?show=1) | [1315. 祖父节点值为偶数的节点和](https://leetcode.cn/problems/sum-of-nodes-with-even-valued-grandparent/?show=1) |
| [1325. Delete Leaves With a Given Value](https://leetcode.com/problems/delete-leaves-with-a-given-value/?show=1) | [1325. 删除给定值的叶子节点](https://leetcode.cn/problems/delete-leaves-with-a-given-value/?show=1) |
| [1339. Maximum Product of Splitted Binary Tree](https://leetcode.com/problems/maximum-product-of-splitted-binary-tree/?show=1) | [1339. 分裂二叉树的最大乘积](https://leetcode.cn/problems/maximum-product-of-splitted-binary-tree/?show=1) |
| [1367. Linked List in Binary Tree](https://leetcode.com/problems/linked-list-in-binary-tree/?show=1) | [1367. 二叉树中的列表](https://leetcode.cn/problems/linked-list-in-binary-tree/?show=1) |
| [1367. Linked List in Binary Tree](https://leetcode.com/problems/linked-list-in-binary-tree/?show=1) | [1367. 二叉树中的链表](https://leetcode.cn/problems/linked-list-in-binary-tree/?show=1) |
| [1372. Longest ZigZag Path in a Binary Tree](https://leetcode.com/problems/longest-zigzag-path-in-a-binary-tree/?show=1) | [1372. 二叉树中的最长交错路径](https://leetcode.cn/problems/longest-zigzag-path-in-a-binary-tree/?show=1) |
| [1373. Maximum Sum BST in Binary Tree](https://leetcode.com/problems/maximum-sum-bst-in-binary-tree/?show=1) | [1373. 二叉搜索子树的最大键值和](https://leetcode.cn/problems/maximum-sum-bst-in-binary-tree/?show=1) |
| [1376. Time Needed to Inform All Employees](https://leetcode.com/problems/time-needed-to-inform-all-employees/?show=1) | [1376. 通知所有员工所需的时间](https://leetcode.cn/problems/time-needed-to-inform-all-employees/?show=1) |
| [145. Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/?show=1) | [145. 二叉树的后序遍历](https://leetcode.cn/problems/binary-tree-postorder-traversal/?show=1) |
| [1457. Pseudo-Palindromic Paths in a Binary Tree](https://leetcode.com/problems/pseudo-palindromic-paths-in-a-binary-tree/?show=1) | [1457. 二叉树中的伪回文路径](https://leetcode.cn/problems/pseudo-palindromic-paths-in-a-binary-tree/?show=1) |
| [1469. Find All The Lonely Nodes](https://leetcode.com/problems/find-all-the-lonely-nodes/?show=1)🔒 | [1469. 寻找所有的独生节点](https://leetcode.cn/problems/find-all-the-lonely-nodes/?show=1)🔒 |
| [1485. Group Sold Products By The Date](https://leetcode.com/problems/group-sold-products-by-the-date/?show=1)🔒 | [1485. 按日期分组销售产品](https://leetcode.cn/problems/group-sold-products-by-the-date/?show=1)🔒 |
| [1485. Clone Binary Tree With Random Pointer](https://leetcode.com/problems/clone-binary-tree-with-random-pointer/?show=1)🔒 | [1485. 克隆含随机指针的二叉树](https://leetcode.cn/problems/clone-binary-tree-with-random-pointer/?show=1)🔒 |
| [1602. Find Nearest Right Node in Binary Tree](https://leetcode.com/problems/find-nearest-right-node-in-binary-tree/?show=1)🔒 | [1602. 找到二叉树中最近的右侧节点](https://leetcode.cn/problems/find-nearest-right-node-in-binary-tree/?show=1)🔒 |
| [1612. Check If Two Expression Trees are Equivalent](https://leetcode.com/problems/check-if-two-expression-trees-are-equivalent/?show=1)🔒 | [1612. 检查两棵二叉表达式树是否等价](https://leetcode.cn/problems/check-if-two-expression-trees-are-equivalent/?show=1)🔒 |
| [865. Smallest Subtree with all the Deepest Nodes](https://leetcode.com/problems/smallest-subtree-with-all-the-deepest-nodes/?show=1) | [865. 具有所有最深节点的最小子树](https://leetcode.cn/problems/smallest-subtree-with-all-the-deepest-nodes/?show=1) |
| [894. All Possible Full Binary Trees](https://leetcode.com/problems/all-possible-full-binary-trees/?show=1) | [894. 所有可能的满二叉树](https://leetcode.cn/problems/all-possible-full-binary-trees/?show=1) |
| [894. All Possible Full Binary Trees](https://leetcode.com/problems/all-possible-full-binary-trees/?show=1) | [894. 所有可能的真二叉树](https://leetcode.cn/problems/all-possible-full-binary-trees/?show=1) |
| [897. Increasing Order Search Tree](https://leetcode.com/problems/increasing-order-search-tree/?show=1) | [897. 递增顺序搜索树](https://leetcode.cn/problems/increasing-order-search-tree/?show=1) |
| [938. Range Sum of BST](https://leetcode.com/problems/range-sum-of-bst/?show=1) | [938. 二叉搜索树的范围和](https://leetcode.cn/problems/range-sum-of-bst/?show=1) |
| [167. Two Sum II - Input Array Is Sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/) | [167. 两数之和 II - 输入有序数组](https://leetcode.cn/problems/two-sum-ii-input-array-is-sorted/) | 🟢
| [167. Two Sum II - Input Array Is Sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/) | [167. 两数之和 II - 输入有序数组](https://leetcode.cn/problems/two-sum-ii-input-array-is-sorted/) | 🟠
| [395. Longest Substring with At Least K Repeating Characters](https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/?show=1) | [395. 至少有 K 个重复字符的最长子串](https://leetcode.cn/problems/longest-substring-with-at-least-k-repeating-characters/?show=1) |
| [424. Longest Repeating Character Replacement](https://leetcode.com/problems/longest-repeating-character-replacement/?show=1) | [424. 替换后的最长重复字符](https://leetcode.cn/problems/longest-repeating-character-replacement/?show=1) |
| [713. Subarray Product Less Than K](https://leetcode.com/problems/subarray-product-less-than-k/?show=1) | [713. 乘积小于K的子数组](https://leetcode.cn/problems/subarray-product-less-than-k/?show=1) |
| [713. Subarray Product Less Than K](https://leetcode.com/problems/subarray-product-less-than-k/?show=1) | [713. 乘积小于 K 的子数组](https://leetcode.cn/problems/subarray-product-less-than-k/?show=1) |
| [862. Shortest Subarray with Sum at Least K](https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/?show=1) | [862. 和至少为 K 的最短子数组](https://leetcode.cn/problems/shortest-subarray-with-sum-at-least-k/?show=1) |
| [151. Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/) | [151. 翻转字符串里的单词](https://leetcode.cn/problems/reverse-words-in-a-string/) | 🟠
| [151. Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/) | [151. 反转字符串中的单词](https://leetcode.cn/problems/reverse-words-in-a-string/) | 🟠
| [17. Letter Combinations of a Phone Number](https://leetcode.com/problems/letter-combinations-of-a-phone-number/?show=1) | [17. 电话号码的字母组合](https://leetcode.cn/problems/letter-combinations-of-a-phone-number/?show=1) |
| [368. Largest Divisible Subset](https://leetcode.com/problems/largest-divisible-subset/?show=1) | [368. 最大整除子集](https://leetcode.cn/problems/largest-divisible-subset/?show=1) |