Swift LeetCode 目录 | Catalog（每周日更新......）

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Swift LeetCode 目录 | Catalog

序        号	题名Title	难度     Difficulty
1	两数之和 | Two Sum	Easy
2	两数相加 | Add Two Numbers	Medium
3	无重复字符的最长子串 | Longest Substring Without Repeating Characters	Medium
4	两个排序数组的中位数 | Median of Two Sorted Arrays	Hard
5	最长回文子串 | Longest Palindromic Substring	Medium
6	Z字形变换 | ZigZag Conversion	Medium
7	反转整数 | Reverse Integer	Easy
8	字符串转整数 (atoi) | String to Integer (atoi)	Medium
9	回文数 | Palindrome Number	Easy
10	正则表达式匹配 | Regular Expression Matching	Hard
11	盛最多水的容器 | Container With Most Water	Medium
12	整数转罗马数字 | Integer to Roman	Medium
13	罗马数字转整数 | Roman to Integer	Easy
14	最长公共前缀 | Longest Common Prefix	Easy
15	三数之和 | 3Sum	Medium
16	最接近的三数之和 | 3Sum Closest	Medium
17	电话号码的字母组合 | Letter Combinations of a Phone Number	Medium
18	四数之和 | 4Sum	Medium
19	删除链表的倒数第N个节点 | Remove Nth Node From End of List	Medium
20	有效的括号 | Valid Parentheses	Easy
21	合并两个有序链表 | Merge Two Sorted Lists	Easy
22	括号生成 | Generate Parentheses	Medium
23	合并K个排序链表 | Merge k Sorted Lists	Hard
24	两两交换链表中的节点 | Swap Nodes in Pairs	Medium
25	k个一组翻转链表 | Reverse Nodes in k-Group	Hard
26	删除排序数组中的重复项 | Remove Duplicates from Sorted Array	Easy
27	移除元素 | Remove Element	Easy
28	实现strStr() | Implement strStr()	Easy
29	两数相除 | Divide Two Integers	Medium
30	与所有单词相关联的字串 | Substring with Concatenation of All Words	Hard
31	下一个排列 | Next Permutation	Medium
32	最长有效括号 | Longest Valid Parentheses	Hard
33	搜索旋转排序数组 | Search in Rotated Sorted Array	Medium
34	在排序数组中查找元素的第一个和最后一个位置 | Find First and Last Position of Element in Sorted Array	Medium
35	搜索插入位置 | Search Insert Position	Easy
36	有效的数独 | Valid Sudoku	Medium
37	解数独 | Sudoku Solver	Hard
38	报数 | Count and Say	Easy
39	组合总和 | Combination Sum	Medium
40	组合总和 II | Combination Sum II	Medium
41	缺失的第一个正数 | First Missing Positive	Hard
42	接雨水 | Trapping Rain Water	Hard
43	字符串相乘 | Multiply Strings	Medium
44	通配符匹配 | Wildcard Matching	Hard
45	跳跃游戏 II | Jump Game II	Hard
46	全排列 | Permutations	Medium
47	全排列 II | Permutations II	Medium
48	旋转图像 | Rotate Image	Medium
49	字母异位词分组 | Group Anagrams	Medium
50	Pow(x, n) | Pow(x, n)	Medium
51	N皇后 | N-Queens	Hard
52	N皇后 II | N-Queens II	Hard
53	最大子序和 | Maximum Subarray	Easy
54	螺旋矩阵 | Spiral Matrix	Medium
55	跳跃游戏 | Jump Game	Medium
56	合并区间 | Merge Intervals	Medium
57	插入区间 | Insert Interval	Hard
58	最后一个单词的长度 | Length of Last Word	Easy
59	螺旋矩阵 II | Spiral Matrix II	Medium
60	第k个排列 | Permutation Sequence	Medium
61	旋转链表 | Rotate List	Medium
62	不同路径 | Unique Paths	Medium
63	不同路径 II | Unique Paths II	Medium
64	最小路径和 | Minimum Path Sum	Medium
65	有效数字 | Valid Number	Hard
66	加一 | Plus One	Easy
67	二进制求和 | Add Binary	Easy
68	文本左右对齐 | Text Justification	Hard
69	x 的平方根 | Sqrt(x)	Easy
70	爬楼梯 | Climbing Stairs	Easy
71	简化路径 | Simplify Path	Medium
72	编辑距离 | Edit Distance	Hard
73	矩阵置零 | Set Matrix Zeroes	Medium
74	搜索二维矩阵 | Search a 2D Matrix	Medium
75	颜色分类 | Sort Colors	Medium
76	最小覆盖子串 | Minimum Window Substring	Hard
77	组合 | Combinations	Medium
78	子集 | Subsets	Medium
79	单词搜索 | Word Search	Medium
80	删除排序数组中的重复项 II | Remove Duplicates from Sorted Array II	Medium
81	搜索旋转排序数组 II | Search in Rotated Sorted Array II	Medium
82	删除排序链表中的重复元素 II | Remove Duplicates from Sorted List II	Medium
83	删除排序链表中的重复元素 | Remove Duplicates from Sorted List	Easy
84	柱状图中最大的矩形 | Largest Rectangle in Histogram	Hard
85	最大矩形 | Maximal Rectangle	Hard
86	分隔链表 | Partition List	Medium
87	扰乱字符串 | Scramble String	Hard
88	合并两个有序数组 | Merge Sorted Array	Easy
89	格雷编码 | Gray Code	Medium
90	子集 II | Subsets II	Medium
91	解码方法 | Decode Ways	Medium
92	反转链表 II | Reverse Linked List II	Medium
93	复原IP地址 | Restore IP Addresses	Medium
94	二叉树的中序遍历 | Binary Tree Inorder Traversal	Medium
95	不同的二叉搜索树 II | Unique Binary Search Trees II	Medium
96	不同的二叉搜索树 | Unique Binary Search Trees	Medium
97	交错字符串 | Interleaving String	Medium
98	验证二叉搜索树 | Validate Binary Search Tree	Medium
99	恢复二叉搜索树 | Recover Binary Search Tree	Medium
100	相同的树 | Same Tree	Hard
101	对称二叉树 | Symmetric Tree	Easy
102	二叉树的层次遍历 | Binary Tree Level Order Traversal	Medium
103	二叉树的锯齿形层次遍历 | Binary Tree Zigzag Level Order Traversal	Medium
104	二叉树的最大深度 | Maximum Depth of Binary Tree	Easy
105	从前序与中序遍历序列构造二叉树 | Construct Binary Tree from Preorder and Inorder Traversal	Medium
106	从中序与后序遍历序列构造二叉树 | Construct Binary Tree from Inorder and Postorder Traversal	Medium
107	二叉树的层次遍历 II | Binary Tree Level Order Traversal II	Easy
108	将有序数组转换为二叉搜索树 | Convert Sorted Array to Binary Search Tree	Easy
109	有序链表转换二叉搜索树 | Convert Sorted List to Binary Search Tree	Medium
110	平衡二叉树 | Balanced Binary Tree	Easy
111	二叉树的最小深度 | Minimum Depth of Binary Tree	Easy
112	路径总和 | Path Sum	Easy
113	路径总和 II | Path Sum II	Medium
114	二叉树展开为链表 | Flatten Binary Tree to Linked List	Medium
115	不同的子序列 | Distinct Subsequences	Hard
116	填充同一层的兄弟节点 | Populating Next Right Pointers in Each Node	Medium
117	填充同一层的兄弟节点 II | Populating Next Right Pointers in Each Node II	Medium
118	杨辉三角 | Pascal's Triangle	Easy
119	杨辉三角 II | Pascal's Triangle II	Easy
120	三角形最小路径和 | Triangle	Medium
121	买卖股票的最佳时机 I | Best Time to Buy and Sell Stock	Easy
122	买卖股票的最佳时机 II | Best Time to Buy and Sell Stock II	Easy
123	买卖股票的最佳时机 III | Best Time to Buy and Sell Stock III	Hard
124	二叉树中的最大路径和 | Binary Tree Maximum Path Sum	Hard
125	验证回文串 | Valid Palindrome	Easy
126	单词接龙 II | Word Ladder II	Hard
127	单词接龙 | Word Ladder	Medium
128	最长连续序列 | Longest Consecutive Sequence	Hard
129	求根到叶子节点数字之和 | Sum Root to Leaf Numbers	Medium
130	被围绕的区域 | Surrounded Regions	Medium
131	分割回文串 | Palindrome Partitioning	Medium
132	分割回文串 II | Palindrome Partitioning II	Hard
133	克隆图 | Clone Graph	Medium
134	加油站 | Gas Station	Medium
135	分发糖果 | Candy	Hard
136	只出现一次的数字 | Single Number	Easy
137	只出现一次的数字 II | Single Number II	Medium
138	复制带随机指针的链表 | Copy List with Random Pointer	Medium
139	单词拆分 | Word Break	Medium
140	单词拆分 II | Word Break II	Hard
141	环形链表 | Linked List Cycle	Easy
142	环形链表 II | Linked List Cycle II	Medium
143	重排链表 | Reorder List	Medium
144	二叉树的前序遍历 | Binary Tree Preorder Traversal	Medium
145	二叉树的后序遍历 | Binary Tree Postorder Traversal	Hard
146	LRU缓存机制 | LRU Cache	Hard
147	对链表进行插入排序 | Insertion Sort List	Medium
148	排序链表 | Sort List	Medium
149	直线上最多的点数 | Max Points on a Line	Hard
150	逆波兰表达式求值 | Evaluate Reverse Polish Notation	Medium
151	翻转字符串里的单词 | Reverse Words in a String	Medium
152	乘积最大子序列 | Maximum Product Subarray	Medium
153	寻找旋转排序数组中的最小值 | Find Minimum in Rotated Sorted Array	Medium
154	寻找旋转排序数组中的最小值 II | Find Minimum in Rotated Sorted Array II	Hard
155	最小栈 | Min Stack	Easy
156	二叉树的上下颠倒 $ Binary Tree Upside Down	Medium
157	用Read4来读取N个字符 $ Read N Characters Given Read4	Easy
158	用Read4来读取N个字符II $ Read N Characters Given Read4 II	Hard
159	具有最多两个不同字符的最长子串 $ Longest Substring with At Most Two Distinct Characters	Hard
160	相交链表 | Intersection of Two Linked Lists	Easy
161	一次编辑距离 $ One Edit Distance	Medium
162	寻找峰值 | Find Peak Element	Medium
163	缺失区间 $ Missing Ranges	Medium
164	最大间距 | Maximum Gap	Hard
165	比较版本号 | Compare Version Numbers	Medium
166	分数到小数 | Fraction to Recurring Decimal	Medium
167	两数之和 II - 输入有序数组 | Two Sum II - Input array is sorted	Easy
168	Excel表列名称 | Excel Sheet Column Title	Easy
169	求众数 | Majority Element	Easy
170	两数之和之三 - 数据结构设计 $ Two Sum III - Data structure design	Easy
171	Excel表列序号 | Excel Sheet Column Number	Easy
172	阶乘后的零 | Factorial Trailing Zeroes	Easy
173	二叉搜索树迭代器 | Binary Search Tree Iterator	Medium
174	地下城游戏 | Dungeon Game	Hard
175	组合两个表 | Combine Two Tables	Easy
176	第二高的薪水 | Second Highest Salary	Easy
177	第N高的薪水 | Nth Highest Salary	Medium
178	分数排名 | Rank Scores	Medium
179	最大数 | Largest Number	Medium
180	连续出现的数字 | Consecutive Numbers	Medium
181	超过经理收入的员工 | Employees Earning More Than Their Managers	Easy
182	查找重复的电子邮箱 | Duplicate Emails	Easy
183	从不订购的客户 | Customers Who Never Order	Easy
184	部门工资最高的员工 | Department Highest Salary	Medium
185	部门工资前三高的员工 | Department Top Three Salaries	Hard
186	翻转字符串中的单词 II $ Reverse Words in a String II	Medium
187	重复的DNA序列 | Repeated DNA Sequences	Medium
188	买卖股票的最佳时机 IV | Best Time to Buy and Sell Stock IV	Hard
189	旋转数组 | Rotate Array	Easy
190	颠倒二进制位 | Reverse Bits	Easy
191	位1的个数 | Number of 1 Bits	Easy
192	统计词频 | Word Frequency	Medium
193	有效电话号码 | Valid Phone Numbers	Easy
194	转置文件 | Transpose File	Medium
195	第十行 | Tenth Line	Easy
196	删除重复的电子邮箱 | Delete Duplicate Emails	Easy
197	上升的温度 | Rising Temperature	Easy
198	打家劫舍 | House Robber	Easy
199	二叉树的右视图 | Binary Tree Right Side View	Medium
200	岛屿的个数 | Number of Islands	Medium
201	数字范围按位与 | Bitwise AND of Numbers Range	Medium
202	快乐数 | Happy Number	Easy
203	移除链表元素 | Remove Linked List Elements	Easy
204	计数质数 | Count Primes	Easy
205	同构字符串 | Isomorphic Strings	Easy
206	反转链表 | Reverse Linked List	Easy
207	课程表 | Course Schedule	Medium
208	实现 Trie (前缀树) | Implement Trie (Prefix Tree)	Medium
209	长度最小的子数组 | Minimum Size Subarray Sum	Medium
210	课程表 II | Course Schedule II	Medium
211	添加与搜索单词 - 数据结构设计 | Add and Search Word - Data structure design	Medium
212	单词搜索 II | Word Search II	Hard
213	打家劫舍 II | House Robber II	Medium
214	最短回文串 | Shortest Palindrome	Hard
215	数组中的第K个最大元素 | Kth Largest Element in an Array	Medium
216	组合总和 III | Combination Sum III	Medium
217	存在重复元素 | Contains Duplicate	Easy
218	天际线问题 | The Skyline Problem	Hard
219	存在重复元素 II | Contains Duplicate II	Easy
220	存在重复元素 III | Contains Duplicate III	Medium
221	最大正方形 | Maximal Square	Medium
222	完全二叉树的节点个数 | Count Complete Tree Nodes	Medium
223	矩形面积 | Rectangle Area	Medium
224	基本计算器 | Basic Calculator	Hard
225	用队列实现栈 | Implement Stack using Queues	Easy
226	翻转二叉树 | Invert Binary Tree	Easy
227	基本计算器 II | Basic Calculator II	Medium
228	汇总区间 | Summary Ranges	Medium
229	求众数 II | Majority Element II	Medium
230	二叉搜索树中第K小的元素 | Kth Smallest Element in a BST	Medium
231	2的幂 | Power of Two	Easy
232	用栈实现队列 | Implement Queue using Stacks	Easy
233	数字1的个数 | Number of Digit One	Hard
234	回文链表 | Palindrome Linked List	Easy
235	二叉搜索树的最近公共祖先 | Lowest Common Ancestor of a Binary Search Tree	Easy
236	二叉树的最近公共祖先 | Lowest Common Ancestor of a Binary Tree	Medium
237	删除链表中的节点 | Delete Node in a Linked List	Easy
238	除自身以外数组的乘积 | Product of Array Except Self	Medium
239	滑动窗口最大值 | Sliding Window Maximum	Hard
240	搜索二维矩阵 II | Search a 2D Matrix II	Medium
241	为运算表达式设计优先级 | Different Ways to Add Parentheses	Medium
242	有效的字母异位词 | Valid Anagram	Easy
243	最短单词距离 $ Shortest Word Distance	Easy
244	最短单词距离 II $ Shortest Word Distance II	Medium
245	最短单词距离 III $ Shortest Word Distance III	Medium
246	对称数 $ Strobogrammatic Number	Easy
247	对称数 II $ Strobogrammatic Number II	Medium
248	对称数 III $ Strobogrammatic Number III	Hard
249	群组偏移字符串 $ Group Shifted Strings	Medium
250	计数相同值子树的个数 $ Count Univalue Subtrees	Medium
251	展平二维向量 $ Flatten 2D Vector	Medium
252	会议室 $ Meeting Rooms	Easy
253	会议室 II $ Meeting Rooms II	Medium
254	因子组合 $ Factor Combinations	Medium
255	验证二叉搜索树的先序序列 $ Verify Preorder Sequence in Binary Search Tree	Medium
256	粉刷房子 $ Paint House	Easy
257	二叉树的所有路径 | Binary Tree Paths	Easy
258	各位相加 | Add Digits	Easy
259	三数之和较小值 $ 3Sum Smaller	Medium
260	只出现一次的数字 III | Single Number III	Medium
261	图验证树 $ Graph Valid Tree	Medium
262	行程和用户 | Trips and Users	Hard
263	丑数 | Ugly Number	Easy
264	丑数 II | Ugly Number II	Medium
265	粉刷房子 II $ Paint House II	Hard
266	回文全排列 $ Palindrome Permutation	Easy
267	回文全排列 II $ Palindrome Permutation II	Medium
268	缺失数字 | Missing Number	Easy
269	外星人词典 $ Alien Dictionary	Hard
270	最近的二分搜索树的值 $ Closest Binary Search Tree Value	Easy
271	加码解码字符串 $ Encode and Decode Strings	Medium
272	最近的二分搜索树的值 II $ Closest Binary Search Tree Value II	Hard
273	整数转换英文表示 | Integer to English Words	Hard
274	H指数 | H-Index	Medium
275	H指数 II | H-Index II	Medium
276	粉刷栅栏 $ Paint Fence	Easy
277	寻找名人 $ Find the Celebrity	Medium
278	第一个错误的版本 | First Bad Version	Easy
279	完全平方数 | Perfect Squares	Medium
280	摆动排序 $ Wiggle Sort	Medium
281	之字形迭代器 $ Zigzag Iterator	Medium
282	给表达式添加运算符 | Expression Add Operators	Hard
283	移动零 | Move Zeroes	Easy
284	顶端迭代器 | Peeking Iterator	Medium
285	二叉搜索树中的中序后继节点 $ Inorder Successor in BST	Medium
286	墙和门 $ Walls and Gates	Medium
287	寻找重复数 | Find the Duplicate Number	Medium
288	唯一单词缩写 $ Unique Word Abbreviation	Medium
289	生命游戏 | Game of Life	Medium
290	单词模式 | Word Pattern	Easy
291	单词模式 II $ Word Pattern II	Hard
292	Nim游戏 | Nim Game	Easy
293	翻转游戏 $ Flip Game	Easy
294	翻转游戏之 II $ Flip Game II	Medium
295	数据流的中位数 | Find Median from Data Stream	Hard
296	最佳开会地点 $ Best Meeting Point	Hard
297	二叉树的序列化与反序列化 | Serialize and Deserialize Binary Tree	Hard
298	二叉树最长连续序列 $ Binary Tree Longest Consecutive Sequence	Medium
299	猜数字游戏 | Bulls and Cows	Medium
300	最长上升子序列 | Longest Increasing Subsequence	Medium
301	删除无效的括号 | Remove Invalid Parentheses	Hard
302	包含黑色像素的最小矩形 $ Smallest Rectangle Enclosing Black Pixels	Hard
303	区域和检索 - 数组不可变 | Range Sum Query - Immutable	Easy
304	二维区域和检索 - 矩阵不可变 | Range Sum Query 2D - Immutable	Medium
305	岛屿的个数 II $ Number of Islands II	Hard
306	累加数 | Additive Number	Medium
307	区域和检索 - 数组可修改 | Range Sum Query - Mutable	Medium
308	二维区域和检索 - 可变 $ Range Sum Query 2D - Mutable	Hard
309	最佳买卖股票时机含冷冻期 | Best Time to Buy and Sell Stock with Cooldown	Medium
310	最小高度树 | Minimum Height Trees	Medium
311	稀疏矩阵相乘 $ Sparse Matrix Multiplication	Medium
312	戳气球 | Burst Balloons	Hard
313	超级丑数 | Super Ugly Number	Medium
314	二叉树的竖直遍历 $ Binary Tree Vertical Order Traversal	Medium
315	计算右侧小于当前元素的个数 | Count of Smaller Numbers After Self	Hard
316	去除重复字母 | Remove Duplicate Letters	Hard
317	建筑物的最短距离 $ Shortest Distance from All Buildings	Hard
318	最大单词长度乘积 | Maximum Product of Word Lengths	Medium
319	灯泡开关 | Bulb Switcher	Medium
320	通用简写 $ Generalized Abbreviation	Medium
321	拼接最大数 | Create Maximum Number	Hard
322	零钱兑换 | Coin Change	Medium
323	无向图中的连通区域的个数 $ Number of Connected Components in an Undirected Graph	Medium
324	摆动排序 II | Wiggle Sort II	Medium
325	最大子数组之和为k $ Maximum Size Subarray Sum Equals k	Medium
326	3的幂 | Power of Three	Easy
327	区间和的个数 | Count of Range Sum	Hard
328	奇偶链表 | Odd Even Linked List	Medium
329	矩阵中的最长递增路径 | Longest Increasing Path in a Matrix	Hard
330	按要求补齐数组 | Patching Array	Hard
331	验证二叉树的前序序列化 | Verify Preorder Serialization of a Binary Tree	Medium
332	重新安排行程 | Reconstruct Itinerary	Medium
333	最大的二分搜索子树 $ Largest BST Subtree	Medium
334	递增的三元子序列 | Increasing Triplet Subsequence	Medium
335	路径交叉 | Self Crossing	Hard
336	回文对 | Palindrome Pairs	Hard
337	打家劫舍 III | House Robber III	Medium
338	比特位计数 | Counting Bits	Medium
339	嵌套链表权重和 $ Nested List Weight Sum	Easy
340	最多有K个不同字符的最长子串 $ Longest Substring with At Most K Distinct Characters	Hard
341	压平嵌套链表迭代器 | Flatten Nested List Iterator	Medium
342	4的幂 | Power of Four	Easy
343	整数拆分 | Integer Break	Medium
344	反转字符串 | Reverse String	Easy
345	反转字符串中的元音字母 | Reverse Vowels of a String	Easy
346	从数据流中移动平均值 $ Moving Average from Data Stream	Easy
347	前K个高频元素 | Top K Frequent Elements	Medium
348	设计井字棋游戏 $ Design Tic-Tac-Toe	Medium
349	两个数组的交集 | Intersection of Two Arrays	Easy
350	两个数组的交集 II | Intersection of Two Arrays II	Easy
351	安卓解锁模式 $ Android Unlock Patterns	Medium
352	将数据流变为多个不相交间隔 | Data Stream as Disjoint Intervals	Hard
353		Medium
354	俄罗斯套娃信封问题 | Russian Doll Envelopes	Hard
355		Medium
356		Medium
357	计算各个位数不同的数字个数 | Count Numbers with Unique Digits	Medium
358		Hard
359		Easy
360		Medium
361		Medium
362		Medium
363	矩形区域不超过 K 的最大数值和 | Max Sum of Rectangle No Larger Than K	Hard
364		Medium
365	水壶问题 | Water and Jug Problem	Medium
366		Medium
367	有效的完全平方数 | Valid Perfect Square	Easy
368	最大整除子集 | Largest Divisible Subset	Medium
369		Medium
370		Medium
371	两整数之和 | Sum of Two Integers	Easy
372	超级次方 | Super Pow	Medium
373	查找和最小的K对数字 | Find K Pairs with Smallest Sums	Medium
374	猜数字大小 | Guess Number Higher or Lower	Easy
375	猜数字大小 II | Guess Number Higher or Lower II	Medium
376	摆动序列 | Wiggle Subsequence	Medium
377	组合总和 Ⅳ | Combination Sum IV	Medium
378	有序矩阵中第K小的元素 | Kth Smallest Element in a Sorted Matrix	Medium
379		Medium
380	常数时间插入、删除和获取随机元素 | Insert Delete GetRandom O(1)	Medium
381	O(1) 时间插入、删除和获取随机元素 - 允许重复 | Insert Delete GetRandom O(1) - Duplicates allowed	Hard
382	链表随机节点 | Linked List Random Node	Medium
383	赎金信 | Ransom Note	Easy
384	打乱数组 | Shuffle an Array	Medium
385	迷你语法分析器 | Mini Parser	Medium
386	字典序排数 | Lexicographical Numbers	Medium
387	字符串中的第一个唯一字符 | First Unique Character in a String	Easy
388	文件的最长绝对路径 | Longest Absolute File Path	Medium
389	找不同 | Find the Difference	Easy
390	消除游戏 | Elimination Game	Medium
391	完美矩形 | Perfect Rectangle	Hard
392	判断子序列 | Is Subsequence	Medium
393	UTF-8 编码验证 | UTF-8 Validation	Medium
394	字符串解码 | Decode String	Medium
395	至少有K个重复字符的最长子串 | Longest Substring with At Least K Repeating Characters	Medium
396	旋转函数 | Rotate Function	Medium
397	整数替换 | Integer Replacement	Medium
398	随机数索引 | Random Pick Index	Medium
399	除法求值 | Evaluate Division	Medium
400	第N个数字 | Nth Digit	Easy
401	二进制手表 | Binary Watch	Easy
402	移掉K位数字 | Remove K Digits	Medium
403	青蛙过河 | Frog Jump	Hard
404	左叶子之和 | Sum of Left Leaves	Easy
405	数字转换为十六进制数 | Convert a Number to Hexadecimal	Easy
406	根据身高重建队列 | Queue Reconstruction by Height	Medium
407	接雨水 II | Trapping Rain Water II	Hard
408		Easy
409	最长回文串 | Longest Palindrome	Easy
410	分割数组的最大值 | Split Array Largest Sum	Hard
411		Hard
412	Fizz Buzz	Easy
413	等差数列划分 | Arithmetic Slices	Medium
414	第三大的数 | Third Maximum Number	Easy
415	字符串相加 | Add Strings	Easy
416	分割等和子集 | Partition Equal Subset Sum	Medium
417	太平洋大西洋水流问题 | Pacific Atlantic Water Flow	Medium
418		Medium
419	甲板上的战舰 | Battleships in a Board	Medium
420	强密码检验器 | Strong Password Checker	Hard
421	数组中两个数的最大异或值 | Maximum XOR of Two Numbers in an Array	Medium
422		Easy
423	从英文中重建数字 | Reconstruct Original Digits from English	Medium
424	替换后的最长重复字符 | Longest Repeating Character Replacement	Medium
425		Hard
426		Medium
427		Easy
428		Hard
429		Easy
430		Medium
431		Hard
432	全 O(1) 的数据结构 | All O`one Data Structure	Hard
433	最小基因变化 | Minimum Genetic Mutation	Medium
434	字符串中的单词数 | Number of Segments in a String	Easy
435	无重叠区间 | Non-overlapping Intervals	Medium
436	寻找右区间 | Find Right Interval	Medium
437	路径总和 III | Path Sum III	Easy
438	找到字符串中所有字母异位词 | Find All Anagrams in a String	Easy
439		Medium
440	字典序的第K小数字 | K-th Smallest in Lexicographical Order	Hard
441	排列硬币 | Arranging Coins	Easy
442	数组中重复的数据 | Find All Duplicates in an Array	Medium
443	压缩字符串 | String Compression	Easy
444		Medium
445	两数相加 II | Add Two Numbers II	Medium
446	等差数列划分 II - 子序列 | Arithmetic Slices II - Subsequence	Hard
447	回旋镖的数量 | Number of Boomerangs	Easy
448	找到所有数组中消失的数字 | Find All Numbers Disappeared in an Array	Easy
449		Medium
450	删除二叉搜索树中的节点 | Delete Node in a BST	Medium
451	根据字符出现频率排序 | Sort Characters By Frequency	Medium
452	用最少数量的箭引爆气球 | Minimum Number of Arrows to Burst Balloons	Medium
453	最小移动次数使数组元素相等 | Minimum Moves to Equal Array Elements	Easy
454	四数相加 II | 4Sum II	Medium
455	分发饼干 | Assign Cookies	Easy
456	132模式 | 132 Pattern	Medium
457	环形数组循环 | Circular Array Loop	Medium
458	可怜的小猪 | Poor Pigs	Hard
459	重复的子字符串 | Repeated Substring Pattern	Easy
460	LFU缓存 | LFU Cache	Hard
461	汉明距离 | Hamming Distance	Easy
462	最少移动次数使数组元素相等 II | Minimum Moves to Equal Array Elements II	Medium
463	岛屿的周长 | Island Perimeter	Easy
464	我能赢吗 | Can I Win	Medium
465		Hard
466	统计重复个数 | Count The Repetitions	Hard
467	环绕字符串中唯一的子字符串 | Unique Substrings in Wraparound String	Medium
468	验证IP地址 | Validate IP Address	Medium
469		Medium
470	用 Rand7() 实现 Rand10() | Implement Rand10() Using Rand7()	Medium
471		Hard
472	连接词 | Concatenated Words	Hard
473	火柴拼正方形 | Matchsticks to Square	Medium
474	一和零 | Ones and Zeroes	Medium
475	供暖器 | Heaters	Easy
476	数字的补数 | Number Complement	Easy
477	汉明距离总和 | Total Hamming Distance	Medium
478	在圆内随机生成点 | Generate Random Point in a Circle	Medium
479	最大回文数乘积 | Largest Palindrome Product	Hard
480	滑动窗口中位数 | Sliding Window Median	Hard
481	神奇字符串 | Magical String	Medium
482	密钥格式化 | License Key Formatting	Easy
483	最小好进制 | Smallest Good Base	Hard
484		Medium
485	最大连续1的个数 | Max Consecutive Ones	Easy
486	预测赢家 | Predict the Winner	Medium
487		Medium
488	祖玛游戏 | Zuma Game	Hard
489		Hard
490		Medium
491	递增子序列 | Increasing Subsequences	Medium
492	构造矩形 | Construct the Rectangle	Easy
493	翻转对 | Reverse Pairs	Hard
494	目标和 | Target Sum	Medium
495	提莫攻击 | Teemo Attacking	Medium
496	下一个更大元素 I | Next Greater Element I	Easy
497	非重叠矩形中的随机点 | Random Point in Non-overlapping Rectangles	Medium
498	对角线遍历 | Diagonal Traverse	Medium
499		Hard
500	键盘行 | Keyboard Row	Easy
501	二叉搜索树中的众数 | Find Mode in Binary Search Tree	Easy
502	IPO(首次公开募股) | Initial Public Offerings	Hard
503	下一个更大元素 II | Next Greater Element II	Medium
504	七进制数 | Base 7	Easy
505		Medium
506	相对名次 | Relative Ranks	Easy
507	完美数 | Perfect Number	Easy
508	出现次数最多的子树元素和 | Most Frequent Subtree Sum	Medium
509	斐波那契数 | Fibonacci Number	Easy
510		Medium
511		Medium
512		Medium
513	找树左下角的值 | Find Bottom Left Tree Value	Medium
514	自由之路 | Freedom Trail	Hard
515	在每个树行中找最大值 | Find Largest Value in Each Tree Row	Medium
516	最长回文子序列 | Longest Palindromic	Medium
517	超级洗衣机 | Super Washing Machines	Hard
518	零钱兑换 II | Coin Change 2	Medium
519	随机翻转矩阵 | Random Flip Matrix	Medium
520	检测大写字母 | Detect Capital	Easy
521	最长特殊序列 Ⅰ | Longest Uncommon Subsequence I	Easy
522	最长特殊序列 II | Longest Uncommon Subsequence II	Medium
523	连续的子数组和 | Continuous Subarray Sum	Medium
524	通过删除字母匹配到字典里最长单词 | Longest Word in Dictionary through Deleting	Medium
525	连续数组 | Contiguous Array	Medium
526	优美的排列 | Beautiful Arrangement	Medium
527		Hard
528	按权重随机选择 | Random Pick with Weight	Medium
529	扫雷游戏 | Minesweeper	Medium
530	二叉搜索树的最小绝对差 | Minimum Absolute Difference in BST	Easy
531		Medium
532	数组中的K-diff数对 | K-diff Pairs in an Array	Easy
533		Medium
534		Medium
535		Medium
536		Medium
537	复数乘法 | Complex Number Multiplication	Medium
538	把二叉搜索树转换为累加树 | Convert BST to Greater Tree	Easy
539	最小时间差 | Minimum Time Difference	Medium
540	有序数组中的单一元素 | Single Element in a Sorted Array	Medium
541	反转字符串 II | Reverse String II	Easy
542	01 矩阵 | 01 Matrix	Medium
543	二叉树的直径 | Diameter of Binary Tree	Easy
544		Medium
545		Medium
546	移除盒子 | Remove Boxes	Hard
547	朋友圈 | Friend Circles	Medium
548		Medium
549		Medium
550		Medium
551	学生出勤纪录 I | Student Attendance Record I	Easy
552	学生出勤记录 II | Student Attendance Record II	Hard
553	最优除法 | Optimal Division	Medium
554	砖墙 | Brick Wall	Medium
555		Medium
556	下一个更大元素 III | Next Greater Element III	Medium
557	反转字符串中的单词 III | Reverse Words in a String III	Easy
558		Easy
559		Easy
560	和为K的子数组 | Subarray Sum Equals K	Medium
561	数组拆分 I | Array Partition I	Easy
562		Medium
563	二叉树的坡度 | Binary Tree Tilt	Easy
564	寻找最近的回文数 | Find the Closest Palindrome	Hard
565	数组嵌套 | Array Nesting	Medium
566	重塑矩阵 | Reshape the Matrix	Easy
567	字符串的排列 | Permutation in String	Medium
568		Hard
569		Hard
570		Medium
571		Hard
572	另一个树的子树 | Subtree of Another Tree	Easy
573		Medium
574		Medium
575	分糖果 | Distribute Candies	Easy
576	出界的路径数 | Out of Boundary Paths	Medium
577	员工奖金 | Employee Bonus	Easy
578		Medium
579		Hard
580		Medium
581	最短无序连续子数组 | Shortest Unsorted Continuous Subarray	Easy
582		Medium
583	两个字符串的删除操作 | Delete Operation for Two Strings	Medium
584		Easy
585		Medium
586		Easy
587	安装栅栏 | Erect the Fence	Hard
588		Hard
589		Easy
590		Easy
591	标签验证器 | Tag Validator	Hard
592	分数加减运算 | Fraction Addition and Subtraction	Medium
593	有效的正方形 | Valid Square	Medium
594	最长和谐子序列 | Longest Harmonious Subsequence	Easy
595	大的国家 | Big Countries	Easy
596	超过5名学生的课 | Classes More Than 5 Students	Easy
597		Easy
598	范围求和 II | Range Addition II	Easy
599	两个列表的最小索引总和 | Minimum Index Sum of Two Lists	Easy
600	不含连续1的非负整数 | Non-negative Integers without Consecutive Ones	Hard
601	体育馆的人流量 | Human Traffic of Stadium	Hard
602		Medium
603		Easy
604		Easy
605	种花问题 | Can Place Flowers	Easy
606	根据二叉树创建字符串 | Construct String from Binary Tree	Easy
607		Easy
608		Medium
609	在系统中查找重复文件 | Find Duplicate File in System	Medium
610		Easy
611	有效三角形的个数 | Valid Triangle Number	Medium
612		Medium
613		Easy
614		Medium
615		Hard
616		Medium
617	合并二叉树 | Merge Two Binary Trees	Easy
618		Hard
619		Easy
620	有趣的电影 | Not Boring Movies	Easy
621	任务调度器 | Task Scheduler	Medium
622	设计循环队列 | Design Circular Queue	Medium
623	在二叉树中增加一行 | Add One Row to Tree	Medium
624		Easy
625		Medium
626	换座位 | Exchange Seats	Medium
627	交换工资 | Swap Salary	Easy
628	三个数的最大乘积 | Maximum Product of Three Numbers	Easy
629	K个逆序对数组 | K Inverse Pairs Array	Hard
630	课程表 III | Course Schedule III	Hard
631		Hard
632	最小区间 | Smallest Range	Hard
633	平方数之和 | Sum of Square Numbers	Easy
634		Medium
635		Medium
636	函数的独占时间 | Exclusive Time of Functions	Medium
637	二叉树的层平均值 | Average of Levels in Binary Tree	Easy
638	大礼包 | Shopping Offers	Medium
639	解码方法 2 | Decode Ways II	Hard
640	求解方程 | Solve the Equation	Medium
641	设计循环双端队列 | Design Circular Deque	Medium
642		Hard
643	子数组最大平均数 I | Maximum Average Subarray I	Easy
644		Hard
645	错误的集合 | Set Mismatch	Easy
646	最长数对链 | Maximum Length of Pair Chain	Medium
647	回文子串 | Palindromic Substrings	Medium
648	单词替换 | Replace Words	Medium
649	Dota2 参议院 | Dota2 Senate	Medium
650	只有两个键的键盘 | 2 Keys Keyboard	Medium
651		Medium
652	寻找重复的子树 | Find Duplicate Subtrees	Medium
653	两数之和 IV - 输入 BST | Two Sum IV - Input is a BST	Easy
654	最大二叉树 | Maximum Binary Tree	Medium
655	输出二叉树 | Print Binary Tree	Medium
656		Hard
657	机器人能否返回原点 | Robot Return to Origin	Easy
658	找到 K 个最接近的元素 | Find K Closest Elements	Medium
659	分割数组为连续子序列 | Split Array into Consecutive Subsequences	Medium
660		Hard
661	图片平滑器 | Image Smoother	Easy
662	二叉树最大宽度 | Maximum Width of Binary Tree	Medium
663		Medium
664	奇怪的打印机 | Strange Printer	Medium
665	非递减数列 | Non-decreasing Array	Medium
666		Medium
667	优美的排列 II | Beautiful Arrangement II	Medium
668	乘法表中第k小的数 | Kth Smallest Number in Multiplication Table	Hard
669	修剪二叉搜索树 | Trim a Binary Search Tree	Easy
670	最大交换 | Maximum Swap	Medium
671	二叉树中第二小的节点 | Second Minimum Node In a Binary Tree	Easy
672	灯泡开关 Ⅱ | Bulb Switcher II	Medium
673	最长递增子序列的个数 | Number of Longest Increasing Subsequence	Medium
674	最长连续递增序列 | Longest Continuous Increasing Subsequence	Easy
675	为高尔夫比赛砍树 | Cut Off Trees for Golf Event	Hard
676	实现一个魔法字典 | Implement Magic Dictionary	Medium
677	键值映射 | Map Sum Pairs	Medium
678	有效的括号字符串 | Valid Parenthesis String	Medium
679	24点游戏 | 24 Game	Medium
680	验证回文字符串 Ⅱ | Valid Palindrome II	Easy
681		Medium
682	棒球比赛 | Baseball Game	Easy
683		Hard
684	冗余连接 | Redundant Connection	Medium
685	冗余连接 II | Redundant Connection II	Hard
686	重复叠加字符串匹配 | Repeated String Match	Easy
687	最长同值路径 | Longest Univalue Path	Easy
688	“马”在棋盘上的概率 | Knight Probability in Chessboard	Medium
689	三个无重叠子数组的最大和 | Maximum Sum of 3 Non-Overlapping Subarrays	Hard
690	员工的重要性 | Employee Importance	Easy
691	贴纸拼词 | Stickers to Spell Word	Hard
692	前K个高频单词 | Top K Frequent Words	Medium
693	交替位二进制数 | Binary Number with Alternating Bits	Easy
694		Medium
695	岛屿的最大面积 | Max Area of Island	Medium
696	计数二进制子串 | Count Binary Substrings	Easy
697	数组的度 | Degree of an Array	Easy
698	划分为k个相等的子集 | Partition to K Equal Sum Subsets	Medium
699	掉落的方块 | Falling Squares	Hard
700	二叉搜索树中的搜索 | Search in a Binary Search Tree	Easy
701	二叉搜索树中的插入操作 | Insert into a Binary Search Tree	Medium
702		Medium
703	数据流中的第K大元素 | Kth Largest Element in a Stream	Easy
704	二分查找 | Binary Search	Easy
705	设计哈希集合 | Design HashSet	Easy
706	设计哈希映射 | Design HashMap	Easy
707	设计链表 | Design Linked List	Easy
708		Medium
709	转换成小写字母 | To Lower Case	Easy
710	黑名单中的随机数 | Random Pick with Blacklist	Hard
711		Hard
712	两个字符串的最小ASCII删除和 | Minimum ASCII Delete Sum for Two Strings	Medium
713	乘积小于K的子数组 | Subarray Product Less Than K	Medium
714	买卖股票的最佳时机含手续费 | Best Time to Buy and Sell Stock with Transaction Fee	Medium
715	Range 模块 | Range Module	Hard
716		Easy
717	1比特与2比特字符 | 1-bit and 2-bit Characters	Easy
718	最长重复子数组 | Maximum Length of Repeated Subarray	Medium
719	找出第 k 小的距离对 | Find K-th Smallest Pair Distance	Hard
720	词典中最长的单词 | Longest Word in Dictionary	Easy
721	账户合并 | Accounts Merge	Medium
722	删除注释 | Remove Comments	Medium
723		Medium
724	寻找数组的中心索引 | Find Pivot Index	Easy
725	分隔链表 | Split Linked List in Parts	Medium
726	原子的数量 | Number of Atoms	Hard
727		Hard
728	自除数 | Self Dividing Numbers	Easy
729	我的日程安排表 I | My Calendar I	Medium
730	统计不同回文子字符串 | Count Different Palindromic Subsequences	Hard
731	我的日程安排表 II | My Calendar II	Medium
732	我的日程安排表 III | My Calendar III	Hard
733	图像渲染 | Flood Fill	Easy
734		Easy
735	行星碰撞 | Asteroid Collision	Medium
736	Lisp 语法解析 | Parse Lisp Expression	Medium
737		Medium
738	单调递增的数字 | Monotone Increasing Digits	Medium
739	每日温度 | Daily Temperatures	Medium
740	删除与获得点数 | Delete and Earn	Medium
741	摘樱桃 | Cherry Pickup	Hard
742		Medium
743	网络延迟时间 | Network Delay Time	Medium
744	寻找比目标字母大的最小字母 | Find Smallest Letter Greater Than Target	Easy
745	前缀和后缀搜索 | Prefix and Suffix Search	Hard
746	使用最小花费爬楼梯 | Min Cost Climbing Stairs	Easy
747	至少是其他数字两倍的最大数 | Largest Number At Least Twice of Others	Easy
748	最短完整词 | Shortest Completing Word	Easy
749	隔离病毒 | Contain Virus	Hard
750		Medium
751		Easy
752	打开转盘锁 | Open the Lock	Medium
753	破解保险箱 | Cracking the Safe	Hard
754	到达终点数字 | Reach a Number	Easy
755		Medium
756	金字塔转换矩阵 | Pyramid Transition Matrix	Medium
757	设置交集大小至少为2 | Set Intersection Size At Least Two	Hard
758		Easy
759		Hard
760		Easy
761	特殊的二进制序列 | Special Binary String	Hard
762	二进制表示中质数个计算置位 | Prime Number of Set Bits in Binary Representation	Easy
763	划分字母区间 | Partition Labels	Medium
764	最大加号标志 | Largest Plus Sign	Medium
765	情侣牵手 | Couples Holding Hands	Hard
766	托普利茨矩阵 | Toeplitz Matrix	Easy
767	重构字符串 | Reorganize String	Medium
768	最多能完成排序的块 II | Max Chunks To Make Sorted II	Hard
769	最多能完成排序的块 | Max Chunks To Make Sorted	Medium
770	基本计算器 IV | Basic Calculator IV	Hard
771	宝石与石头 | Jewels and Stones	Easy
772		Hard
773	滑动谜题 | Sliding Puzzle	Hard
774		Hard
775	全局倒置与局部倒置 | Global and Local Inversions	Medium
776		Medium
777	在LR字符串中交换相邻字符 | Swap Adjacent in LR String	Medium
778	水位上升的泳池中游泳 | Swim in Rising Water	Hard
779	第K个语法符号 | K-th Symbol in Grammar	Medium
780	到达终点 | Reaching Points	Hard
781	森林中的兔子 | Rabbits in Forest	Medium
782	变为棋盘 | Transform to Chessboard	Hard
783	二叉搜索树结点最小距离 | Minimum Distance Between BST Nodes	Easy
784	字母大小写全排列 | Letter Case Permutation	Easy
785	判断二分图 | Is Graph Bipartite?	Medium
786	第 K 个最小的素数分数 | K-th Smallest Prime Fraction	Hard
787	K 站中转内最便宜的航班 | Cheapest Flights Within K Stops	Medium
788	旋转数字 | Rotated Digits	Easy
789	逃脱阻碍者 | Escape The Ghosts	Medium
790	多米诺和托米诺平铺 | Domino and Tromino Tiling	Medium
791	自定义字符串排序 | Custom Sort String	Medium
792	匹配子序列的单词数 | Number of Matching Subsequences	Medium
793	阶乘函数后K个零 | Preimage Size of Factorial Zeroes Function	Hard
794	有效的井字游戏 | Valid Tic-Tac-Toe State	Medium
795	区间子数组个数 | Number of Subarrays with Bounded Maximum	Medium
796	旋转字符串 | Rotate String	Easy
797	所有可能的路径 | All Paths From Source to Target	Medium
798	得分最高的最小轮调 | Smallest Rotation with Highest Score	Hard
799	香槟塔 | Champagne Tower	Medium
800		Easy
801	使序列递增的最小交换次数 | Minimum Swaps To Make Sequences Increasing	Medium
802	找到最终的安全状态 | Find Eventual Safe States	Medium
803	打砖块 | Bricks Falling When Hit	Hard
804	唯一摩尔斯密码词 | Unique Morse Code Words	Easy
805	数组的均值分割 | Split Array With Same Average	Hard
806	写字符串需要的行数 | Number of Lines To Write String	Easy
807	保持城市天际线 | Max Increase to Keep City Skyline	Medium
808	分汤 | Soup Servings	Medium
809	情感丰富的文字 | Expressive Words	Medium
810	黑板异或游戏 | Chalkboard XOR Game	Hard
811	子域名访问计数 | Subdomain Visit Count	Easy
812	最大三角形面积 | Largest Triangle Area	Easy
813	最大平均值和的分组 | Largest Sum of Averages	Medium
814	二叉树剪枝 | Binary Tree Pruning	Medium
815	公交路线 | Bus Routes	Hard
816	模糊坐标 | Ambiguous Coordinates	Medium
817	链表组件 | Linked List Components	Medium
818	赛车 | Race Car	Hard
819	最常见的单词 | Most Common Word	Easy
820	单词的压缩编码 | Short Encoding of Words	Medium
821	字符的最短距离 | Shortest Distance to a Character	Easy
822	翻转卡片游戏 | Card Flipping Game	Medium
823	带因子的二叉树 | Binary Trees With Factors	Medium
824	山羊拉丁文 | Goat Latin	Easy
825	适龄的朋友 | Friends Of Appropriate Ages	Medium
826	安排工作以达到最大收益 | Most Profit Assigning Work	Medium
827	最大人工岛 | Making A Large Island	Hard
828	独特字符串 | Unique Letter String	Hard
829	连续整数求和 | Consecutive Numbers Sum	Hard
830	较大分组的位置 | Positions of Large Groups	Easy
831	隐藏个人信息 | Masking Personal Information	Medium
832	翻转图像 | Flipping an Image	Easy
833	字符串中的查找与替换 | Find And Replace in String	Medium
834	树中距离之和 | Sum of Distances in Tree	Hard
835	图像重叠 | Image Overlap	Medium
836	矩形重叠 | Rectangle Overlap	Easy
837	新21点 | New 21 Game	Medium
838	推多米诺 | Push Dominoes	Medium
839	相似字符串组 | Similar String Groups	Hard
840	矩阵中的幻方 | Magic Squares In Grid	Easy
841	钥匙和房间 | Keys and Rooms	Medium
842	将数组拆分成斐波那契序列 | Split Array into Fibonacci Sequence	Medium
843	猜猜这个单词 | Guess the Word	Hard
844	比较含退格的字符串 | Backspace String Compare	Easy
845	数组中的最长山脉 | Longest Mountain in Array	Medium
846	一手顺子 | Hand of Straights	Medium
847	访问所有节点的最短路径 | Shortest Path Visiting All Nodes	Hard
848	字母移位 | Shifting Letters	Medium
849	到最近的人的最大距离 | Maximize Distance to Closest Person	Easy
850	矩形面积 II | Rectangle Area II	Hard
851	喧闹和富有 | Loud and Rich	Medium
852	山脉数组的峰顶索引 | Peak Index in a Mountain Array	Easy
853	车队 | Car Fleet	Medium
854	相似度为 K 的字符串 | K-Similar Strings	Hard
855	考场就座 | Exam Room	Medium
856	括号的分数 | Score of Parentheses	Medium
857	雇佣 K 名工人的最低成本 | Minimum Cost to Hire K Workers	Hard
858	镜面反射 | Mirror Reflection	Medium
859	亲密字符串 | Buddy Strings	Easy
860	柠檬水找零 | Lemonade Change	Easy
861	翻转矩阵后的得分 | Score After Flipping Matrix	Medium
862	和至少为 K 的最短子数组 | Shortest Subarray with Sum at Least K	Hard
863	二叉树中所有距离为 K 的结点 | All Nodes Distance K in Binary Tree	Medium
864	获取所有钥匙的最短路径 | Shortest Path to Get All Keys	Hard
865	具有所有最深结点的最小子树 | Smallest Subtree with all the Deepest Nodes	Medium
866	回文素数 | Prime Palindrome	Medium
867	转置矩阵 | Transpose Matrix	Easy
868	二进制间距 | Binary Gap	Easy
869	重新排序得到 2 的幂 | Reordered Power of 2	Medium
870	优势洗牌 | Advantage Shuffle	Medium
871	最低加油次数 | Minimum Number of Refueling Stops	Hard
872	叶子相似的树 | Leaf-Similar Trees	Easy
873	最长的斐波那契子序列的长度 | Length of Longest Fibonacci Subsequence	Medium
874	模拟行走机器人 | Walking Robot Simulation	Easy
875	爱吃香蕉的珂珂 | Koko Eating Bananas	Medium
876	链表的中间结点 | Middle of the Linked List	Easy
877	石子游戏 | Stone Game	Medium
878	第 N 个神奇数字 | Nth Magical Number	Hard
879	盈利计划 | Profitable Schemes	Hard
880	索引处的解码字符串 | Decoded String at Index	Medium
881	救生艇 | Boats to Save People	Medium
882	细分图中的可到达结点 | Reachable Nodes In Subdivided Graph	Hard
883	三维形体投影面积 | Projection Area of 3D Shapes	Easy
884	两句话中的不常见单词 | Uncommon Words from Two Sentences	Easy
885	螺旋矩阵 III | Spiral Matrix III	Medium
886	可能的二分法 | Possible Bipartition	Medium
887	鸡蛋掉落 | Super Egg Drop	Hard
888	公平的糖果交换 | Fair Candy Swap	Easy
889	根据前序和后序遍历构造二叉树 | Construct Binary Tree from Preorder and Postorder Traversal	Medium
890	查找和替换模式 | Find and Replace Pattern	Medium
891	子序列宽度之和 | Sum of Subsequence Widths	Hard
892	三维形体的表面积 | Surface Area of 3D Shapes	Easy
893	特殊等价字符串组 | Groups of Special-Equivalent Strings	Easy
894	所有可能的满二叉树 | All Possible Full Binary Trees	Medium
895	最大频率栈 | Maximum Frequency Stack	Hard
896	单调数列 | Monotonic Array	Easy
897	递增顺序查找树 | Increasing Order Search Tree	Easy
898	子数组按位或操作 | Bitwise ORs of Subarrays	Medium
899	有序队列 | Orderly Queue	Hard
900	RLE 迭代器 | RLE Iterator	Medium
901	股票价格跨度 | Online Stock Span	Medium
902	最大为 N 的数字组合 | Numbers At Most N Given Digit Set	Hard
903	DI 序列的有效排列 | Valid Permutations for DI Sequence	Hard
904	水果成篮 | Fruit Into Baskets	Medium
905	按奇偶排序数组 | Sort Array By Parity	Easy
906	超级回文数 | Super Palindromes	Hard
907	子数组的最小值之和 | Sum of Subarray Minimums	Medium
908	最小差值 I | Smallest Range I	Easy
909	蛇梯棋 | Snakes and Ladders	Medium
910	最小差值 II | Smallest Range II	Medium
911	在线选举 | Online Election	Medium
912	排序数组 | Sort an Array	Medium
913	猫与老鼠 | Cat and Mouse	Hard
914	一副牌中的X | X of a Kind in a Deck of Cards	Easy
915	将分区数组分成不相交的间隔 | Partition Array into Disjoint Intervals	Medium
916	单词子集 | Word Subsets	Medium
917	仅仅反转字母 | Reverse Only Letters	Easy
918	环形子数组的最大和 | Maximum Sum Circular Subarray	Medium
919	完全二叉树插入器 | Complete Binary Tree Inserter	Medium
920	播放列表的数量 | Number of Music Playlists	Hard
921	使括号有效的最少添加 | Minimum Add to Make Parentheses Valid	Medium
922	按奇偶排序数组 II | Sort Array By Parity II	Easy
923	三数之和的多种可能 | 3Sum With Multiplicity	Medium
924	尽量减少恶意软件的传播 | Minimize Malware Spread	Hard
925	长按键入 | Long Pressed Name	Easy
926	将字符串翻转到单调递增 | Flip String to Monotone Increasing	Medium
927	三等分 | Three Equal Parts	Hard
928	尽量减少恶意软件的传播 II | Minimize Malware Spread II	Hard
929	独特的电子邮件地址 | Unique Email Addresses	Easy
930	和相同的二元子数组 | Binary Subarrays With Sum	Medium
931	下降路径最小和 | Minimum Falling Path Sum	Medium
932	漂亮数组 | Beautiful Array	Medium
933	最近的请求次数 | Number of Recent Calls	Easy
934	最短的桥 | Shortest Bridge	Medium
935	骑士拨号器 | Knight Dialer	Medium
936	戳印序列 | Stamping The Sequence	Hard
937	重新排列日志文件 | Reorder Log Files	Easy
938	二叉搜索树的范围和 | Range Sum of BST	Medium
939	最小面积矩形 | Minimum Area Rectangle	Medium
940	不同的子序列 II | Distinct Subsequences II	Hard
941	有效的山脉数组 | Valid Mountain Array	Easy
942	增减字符串匹配 | DI String Match	Easy
943	最短超级串 | Find the Shortest Superstring	Hard
944	删除列以使之有序 | Delete Columns to Make Sorted	Easy
945	使数组唯一的最小增量 | Minimum Increment to Make Array Unique	Medium
946	验证栈序列 | Validate Stack Sequences	Medium
947	移除最多的同行或同列石头 | Most Stones Removed with Same Row or Column	Medium
948	令牌放置 | Bag of Tokens	Medium
949	给定数字能组成的最大时间 | Largest Time for Given Digits	Easy
950	按递增顺序显示卡牌 | Reveal Cards In Increasing Order	Medium
951	翻转等价二叉树 | Flip Equivalent Binary Trees	Medium
952	按公因数计算最大组件大小 | Largest Component Size by Common Factor	Hard
953	验证外星语词典 | Verifying an Alien Dictionary	Easy
954	二倍数对数组 | Array of Doubled Pairs	Medium
955	删列造序 II | Delete Columns to Make Sorted II	Medium
956	最高的广告牌 | Tallest Billboard	Hard
957	N天后的牢房 | Prison Cells After N Days	Medium
958	二叉树的完全性检验 | Check Completeness of a Binary Tree	Medium
959	由斜杠划分区域 | Regions Cut By Slashes	Medium
960	删列造序 III | Delete Columns to Make Sorted III	Hard
961	重复 N 次的元素 | N-Repeated Element in Size 2N Array	Easy
962	最大宽度坡 | Maximum Width Ramp	Medium
963	最小面积矩形 II | Minimum Area Rectangle II	Medium
964	表示数字的最少运算符 | Least Operators to Express Number	Hard
965	单值二叉树 | Univalued Binary Tree	Easy
966	元音拼写检查器 | Vowel Spellchecker	Medium
967	连续差相同的数字 | Numbers With Same Consecutive Differences	Medium
968	监控二叉树 | Binary Tree Cameras	Hard
969	煎饼排序 | Pancake Sorting	Medium
970	强整数 | Powerful Integers	Easy
971	翻转二叉树以匹配先序遍历 | Flip Binary Tree To Match Preorder Traversal	Medium
972	相等的有理数 | Equal Rational Numbers	Hard
973	最接近原点的 K 个点 | K Closest Points to Origin	Medium
974	和可被 K 整除的子数组 | Subarray Sums Divisible by K	Medium
975	奇偶跳 | Odd Even Jump	Hard
976	三角形的最大周长 | Largest Perimeter Triangle	Easy
977	有序数组的平方 | Squares of a Sorted Array	Easy
978	最长湍流子数组 | Longest Turbulent Subarray	Medium
979	在二叉树中分配硬币 | Distribute Coins in Binary Tree	Medium
980	不同路径 III | Unique Paths III	Hard
981	基于时间的键值存储 | Time Based Key-Value Store	Medium
982	按位与为零的三元组 | Triples with Bitwise AND Equal To Zero	Hard
983	最低票价 | Minimum Cost For Tickets	Medium
984	不含 AAA 或 BBB 的字符串 | String Without AAA or BBB	Medium
985	查询后的偶数和 | Sum of Even Numbers After Queries	Easy
986	区间列表的交集 | Interval List Intersections	Medium
987	二叉树的垂序遍历 | Vertical Order Traversal of a Binary Tree	Medium
988	从叶结点开始的最小字符串 | Smallest String Starting From Leaf	Medium
989	数组形式的整数加法 | Add to Array-Form of Integer	Easy
990	等式方程的可满足性 | Satisfiability of Equality Equations	Medium
991	坏了的计算器 | Broken Calculator	Medium
992	K 个不同整数的子数组 | Subarrays with K Different Integers	Hard
993	二叉树的堂兄弟节点 | Cousins in Binary Tree	Easy
994	腐烂的橘子 | Rotting Oranges	Easy
995	K 连续位的最小翻转次数 | Minimum Number of K Consecutive Bit Flips	Hard
996	正方形数组的数目 | Number of Squareful Arrays	Hard
997	找到小镇的法官 | Find the Town Judge	Easy
998	最大二叉树 II | Maximum Binary Tree II	Medium
999	车的可用捕获量 | Available Captures for Rook	Easy
1000	合并石头的最低成本 | Minimum Cost to Merge Stones	Hard
1001	网格照明 | Grid Illumination	Hard
1002	查找常用字符 | Find Common Characters	Easy
1003	检查替换后的词是否有效 | Check If Word Is Valid After Substitutions	Medium
1004	最大连续1的个数 III | Max Consecutive Ones III	Medium
1005	K 次取反后最大化的数组和 | Maximize Sum Of Array After K Negations	Easy
1006	笨阶乘 | Clumsy Factorial	Medium
1007	行相等的最少多米诺旋转 | Minimum Domino Rotations For Equal Row	Medium
1008	先序遍历构造二叉树 | Construct Binary Search Tree from Preorder Traversal	Medium
1009	十进制整数的补码 | Complement of Base 10 Integer	Easy
1010	总持续时间可被 60 整除的歌曲 | Pairs of Songs With Total Durations Divisible by 60	Easy
1011	在 D 天内送达包裹的能力 | Capacity To Ship Packages Within D Days	Medium
1012	至少有 1 位重复的数字 | Numbers With 1 Repeated Digit	Hard
1013	将数组分成和相等的三个部分 | Partition Array Into Three Parts With Equal Sum	Easy
1014	最佳观光组合 | Best Sightseeing Pair	Medium
1015	可被 K 整除的最小整数 | Smallest Integer Divisible by K	Medium
1016	子串能表示从 1 到 N 数字的二进制串 | Binary String With Substrings Representing 1 To N	Medium
1017	负二进制转换 | Convert to Base -2	Medium
1018	可被 5 整除的二进制前缀 | Binary Prefix Divisible By 5	Easy
1019	链表中的下一个更大节点 | Next Greater Node In Linked List	Medium
1020	飞地的数量 | Number of Enclaves	Medium
1021	删除最外层的括号 | Remove Outermost Parentheses	Easy
1022	从根到叶的二进制数之和 | Sum of Root To Leaf Binary Numbers	Easy
1023	驼峰式匹配 | Camelcase Matching	Medium
1024	视频拼接 | Video Stitching	Medium
1025	除数博弈 | Divisor Game	Easy
1026	节点与其祖先之间的最大差值 | Maximum Difference Between Node and Ancestor	Medium
1027	最长等差数列 | Longest Arithmetic Sequence	Medium
1028	从先序遍历还原二叉树 | Recover a Tree From Preorder Traversal	Hard
1029	两地调度 | Two City Scheduling	Easy
1030	距离顺序排列矩阵单元格 | Matrix Cells in Distance Order	Easy
1031	两个非重叠子数组的最大和 | Maximum Sum of Two Non-Overlapping Subarrays	Medium
1032	字符流 | Stream of Characters	Hard
1033	移动石子直到连续 | Moving Stones Until Consecutive	Easy
1034	边框着色 | Coloring A Border	Medium
1035	不相交的线 | Uncrossed Lines	Medium
1036	逃离大迷宫 | Escape a Large Maze	Hard
1037	有效的回旋镖 | Valid Boomerang	Easy
1038	从二叉搜索树到更大和树 | Binary Search Tree to Greater Sum Tree	Medium
1039	多边形三角剖分的最低得分 | Minimum Score Triangulation of Polygon	Medium
1040	移动石子直到连续 II | Moving Stones Until Consecutive II	Medium
1041	困于环中的机器人 | Robot Bounded In Circle	Easy
1042	不邻接植花 | Flower Planting With No Adjacent	Easy
1043	分隔数组以得到最大和 | Partition Array for Maximum Sum	Medium
1044	最长重复子串 | Longest Duplicate Substring	Hard
1045	购买所有产品的客户 | Customers Who Bought All Products	Medium
1046	最后一块石头的重量 | Last Stone Weight	Easy
1047	删除字符串中的所有相邻重复项 | Remove All Adjacent Duplicates In String	Easy
1048	最长字符串链 | Longest String Chain	Medium
1049	最后一块石头的重量 II | Last Stone Weight II	Medium
1050	合作至少三次的演员和导演 | Actors and Directors Who Cooperated At Least Three Times	Easy
1051	高度检查器 | Height Checker	Easy
1052	爱生气的书店老板 | Grumpy Bookstore Owner	Medium
1053	交换一次的先前排列 | Previous Permutation With One Swap	Medium
1054	距离相等的条形码 | Distant Barcodes	Medium
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064	不动点 | Fixed Point	Easy
1065	字符串的索引对 | Index Pairs of a String	Easy
1066	校园自行车分配 II | Campus Bikes II	Medium
1067	范围内的数字计数 | Digit Count in Range	Hard
1068
1069
1070
1071	字符串的最大公因子 | Greatest Common Divisor of Strings	Easy
1072	按列翻转得到最大值等行数 | Flip Columns For Maximum Number of Equal Rows	Medium
1073	负二进制数相加 | Adding Two Negabinary Numbers	Medium
1074	元素和为目标值的子矩阵数量 | Number of Submatrices That Sum to Target	Hard
1075
1076
1077
1078	Bigram 分词 | Occurrences After Bigram	Easy
1079	活字印刷 | Letter Tile Possibilities	Medium
1080	根到叶路径上的不足节点 | Insufficient Nodes in Root to Leaf Paths	Medium
1081	不同字符的最小子序列 | Smallest Subsequence of Distinct Characters	Medium
1082
1083
1084
1085	最小元素各数位之和 | Sum of Digits in the Minimum Number	Easy
1086	前五科的均分 | High Five	Easy
1087	字母切换 | Permutation of Letters	Medium
1088	易混淆数 II | Confusing Number II	Hard
1089	复写零 | Duplicate Zeros	Easy
1090	受标签影响的最大值 | Largest Values From Labels	Medium
1091	二进制矩阵中的最短路径 | Shortest Path in Binary Matrix	Medium
1092	最短公共超序列 | Shortest Common Supersequence	Hard
1093	大样本统计 | Statistics from a Large Sample	Medium
1094	拼车 | Car Pooling	Medium
1095	山脉数组中查找目标值 | Find in Mountain Array	Hard
1096	花括号展开 II | Brace Expansion II	Hard
1097		Hard
1098		Medium
1099	小于 K 的两数之和 | Two Sum Less Than K	Easy
1100	长度为 K 的无重复字符子串 | Find K-Length Substrings With No Repeated Characters	Medium
1101	彼此熟识的最早时间 | The Earliest Moment When Everyone Become Friends	Medium
1102	得分最高的路径 | Path With Maximum Minimum Value	Medium
1103	分糖果 II | Distribute Candies to People	Easy
1104	二叉树寻路 | Path In Zigzag Labelled Binary Tree	Easy
1105	填充书架 | Filling Bookcase Shelves	Medium
1106	解析布尔表达式 | Parsing A Boolean Expression	Hard
1107		Medium
1108	IP 地址无效化 | Defanging an IP Address	Easy
1109	航班预订统计 | Corporate Flight Bookings	Medium
1110	删点成林 | Delete Nodes And Return Forest	Medium
1111	有效括号的嵌套深度 | Maximum Nesting Depth of Two Valid Parentheses Strings	Medium
1112		Medium
1113		Easy
1114	按序打印 | Print in Order	Easy
1115	交替打印FooBar | Print FooBar Alternately	Medium
1116	打印零与奇偶数 | Print Zero Even Odd	Medium
1117	H2O 生成 | Building H2O	Hard
1118	一月有多少天 | Number of Days in a Month	Easy
1119	删去字符串中的元音 | Remove Vowels from a String	Easy
1120	子树的最大平均值 | Maximum Average Subtree	Medium
1121	将数组分成几个递增序列 | Divide Array Into Increasing Sequences	Hard
1122	数组的相对排序 | Relative Sort Array	Easy
1123	最深叶节点的最近公共祖先 | Lowest Common Ancestor of Deepest Leaves	Medium
1124	表现良好的最长时间段 | Longest Well-Performing Interval	Medium
1125	最小的必要团队 | Smallest Sufficient Team	Hard
1126
1127
1128	等价多米诺骨牌对的数量 | Number of Equivalent Domino Pairs	Easy
1129	颜色交替的最短路径 | Shortest Path with Alternating Colors	Medium
1130	叶值的最小代价生成树 | Minimum Cost Tree From Leaf Values	Medium
1131	绝对值表达式的最大值 | Maximum of Absolute Value Expression	Medium
1132		Medium
1133	最大唯一数 | Largest Unique Number	Easy
1134	阿姆斯特朗数 | Armstrong Number	Easy
1135	最低成本联通所有城市 | Connecting Cities With Minimum Cost	Medium
1136	平行课程 | Parallel Courses	Hard
1137	第 N 个泰波那契数 | N-th Tribonacci Number	Easy
1138	字母板上的路径 | Alphabet Board Path	Medium
1139	最大的以 1 为边界的正方形 | Largest 1-Bordered Square	Medium
1140	石子游戏 II | Stone Game II	Medium
1141
1142
1143	最长公共子序列 | Longest Common Subsequence	Medium
1144	递减元素使数组呈锯齿状 | Decrease Elements To Make Array Zigzag	Medium
1145	二叉树着色游戏 | Binary Tree Coloring Game	Medium
1146	快照数组 | Snapshot Array	Medium
1147	段式回文 | Longest Chunked Palindrome Decomposition	Hard
1148		Easy
1149		Medium
1150	检查一个数是否在数组中占绝大多数 | Check If a Number Is Majority Element in a Sorted Array	Easy
1151	最少交换次数来组合所有的 1 | Minimum Swaps to Group All 1's Together	Medium
1152	用户网站访问行为分析 | Analyze User Website Visit Pattern	Medium
1153	字符串转化 | String Transforms Into Another String	Hard
1154	一年中的第几天 | Ordinal Number Of Date	Easy
1155	掷骰子的N种方法 | Number of Dice Rolls With Target Sum	Medium
1156	单字符重复子串的最大长度 | Swap For Maximum Repeated Substring	Medium
1157	子数组中占绝大多数的元素 | Online Majority Element In Subarray	Hard
1158		Medium
1159		Hard
1160	拼写单词 | Find Words That Can Be Formed by Characters	Easy
1161	最大层内元素和 | Maximum Level Sum of a Binary Tree	Medium
1162	地图分析 | As Far from Land as Possible	Medium
1163	按字典序排在最后的子串 | Last Substring in Lexicographical Order	Hard
1164		Medium
1165	单行键盘 | Single-Row Keyboard	Easy
1166	设计文件系统 | Design File System	Medium
1167	连接棒材的最低费用 | Minimum Cost to Connect Sticks	Medium
1168	水资源分配优化 | Optimize Water Distribution in a Village	Hard
1169	查询无效交易 | Invalid Transactions	Easy
1170	比较字符串最小字母出现频次 | Compare Strings by Frequency of the Smallest Character	Easy
1171	从链表中删去总和值为零的连续节点 | Remove Zero Sum Consecutive Nodes from Linked List	Hard
1172	餐盘栈 | Dinner Plate Stacks
1173
1174
1175	质数排列 | Prime Arrangements	Easy
1176	健身计划评估 | Diet Plan Performance	Easy
1177	构建回文串检测 | Can Make Palindrome from Substring	Medium
1178	猜字谜 | Number of Valid Words for Each Puzzle	Hard
1179	重新格式化部门表 | Reformat Department Table	Easy
1180	统计只含单一字母的子串 ｜ Count Substrings with Only One Distinct Letter	Easy
1181	前后拼接 ｜ Before and After Puzzle	Medium
1182	与目标颜色间的最短距离 ｜ Shortest Distance to Target Color	Medium
1183	矩阵中 1 的最大数量 ｜ Maximum Number of Ones	Hard
1184	公交站间的距离 | Distance Between Bus Stops	Easy
1185	删除一次得到子数组最大和 | Maximum Subarray Sum with One Deletion	Easy
1186	一周中的第几天 | Day of the Week	Medium
1187	使数组严格递增 | Make Array Strictly Increasing	Hard
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200

 

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