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ID	Title	Difficulty	Lock
1	Two Sum	Easy	Normal
2	Add Two Numbers	Medium	Normal
3	Longest Substring Without Repeating Characters	Medium	Normal
4	Median of Two Sorted Arrays	Hard	Normal
5	Longest Palindromic Substring	Medium	Normal
6	ZigZag Conversion	Medium	Normal
7	Reverse Integer	Easy	Normal
8	String to Integer (atoi)	Medium	Normal
9	Palindrome Number	Easy	Normal
10	Regular Expression Matching	Hard	Normal
11	Container With Most Water	Medium	Normal
12	Integer to Roman	Medium	Normal
13	Roman to Integer	Easy	Normal
14	Longest Common Prefix	Easy	Normal
15	3Sum	Medium	Normal
16	3Sum Closest	Medium	Normal
17	Letter Combinations of a Phone Number	Medium	Normal
18	4Sum	Medium	Normal
19	Remove Nth Node From End of List	Medium	Normal
20	Valid Parentheses	Easy	Normal
21	Merge Two Sorted Lists	Easy	Normal
22	Generate Parentheses	Medium	Normal
23	Merge k Sorted Lists	Hard	Normal
24	Swap Nodes in Pairs	Medium	Normal
25	Reverse Nodes in k-Group	Hard	Normal
26	Remove Duplicates from Sorted Array	Easy	Normal
27	Remove Element	Easy	Normal
28	Implement strStr()	Easy	Normal
29	Divide Two Integers	Medium	Normal
30	Substring with Concatenation of All Words	Hard	Normal
31	Next Permutation	Medium	Normal
32	Longest Valid Parentheses	Hard	Normal
33	Search in Rotated Sorted Array	Medium	Normal
34	Find First and Last Position of Element in Sorted Array	Medium	Normal
35	Search Insert Position	Easy	Normal
36	Valid Sudoku	Medium	Normal
37	Sudoku Solver	Hard	Normal
38	Count and Say	Easy	Normal
39	Combination Sum	Medium	Normal
40	Combination Sum II	Medium	Normal
41	First Missing Positive	Hard	Normal
42	Trapping Rain Water	Hard	Normal
43	Multiply Strings	Medium	Normal
44	Wildcard Matching	Hard	Normal
45	Jump Game II	Hard	Normal
46	Permutations	Medium	Normal
47	Permutations II	Medium	Normal
48	Rotate Image	Medium	Normal
49	Group Anagrams	Medium	Normal
50	Pow(x, n)	Medium	Normal
51	N-Queens	Hard	Normal
52	N-Queens II	Hard	Normal
53	Maximum Subarray	Easy	Normal
54	Spiral Matrix	Medium	Normal
55	Jump Game	Medium	Normal
56	Merge Intervals	Medium	Normal
57	Insert Interval	Hard	Normal
58	Length of Last Word	Easy	Normal
59	Spiral Matrix II	Medium	Normal
60	Permutation Sequence	Medium	Normal
61	Rotate List	Medium	Normal
62	Unique Paths	Medium	Normal
63	Unique Paths II	Medium	Normal
64	Minimum Path Sum	Medium	Normal
65	Valid Number	Hard	Normal
66	Plus One	Easy	Normal
67	Add Binary	Easy	Normal
68	Text Justification	Hard	Normal
69	Sqrt(x)	Easy	Normal
70	Climbing Stairs	Easy	Normal
71	Simplify Path	Medium	Normal
72	Edit Distance	Hard	Normal
73	Set Matrix Zeroes	Medium	Normal
74	Search a 2D Matrix	Medium	Normal
75	Sort Colors	Medium	Normal
76	Minimum Window Substring	Hard	Normal
77	Combinations	Medium	Normal
78	Subsets	Medium	Normal
79	Word Search	Medium	Normal
80	Remove Duplicates from Sorted Array II	Medium	Normal
81	Search in Rotated Sorted Array II	Medium	Normal
82	Remove Duplicates from Sorted List II	Medium	Normal
83	Remove Duplicates from Sorted List	Easy	Normal
84	Largest Rectangle in Histogram	Hard	Normal
85	Maximal Rectangle	Hard	Normal
86	Partition List	Medium	Normal
87	Scramble String	Hard	Normal
88	Merge Sorted Array	Easy	Normal
89	Gray Code	Medium	Normal
90	Subsets II	Medium	Normal
91	Decode Ways	Medium	Normal
92	Reverse Linked List II	Medium	Normal
93	Restore IP Addresses	Medium	Normal
94	Binary Tree Inorder Traversal	Medium	Normal
95	Unique Binary Search Trees II	Medium	Normal
96	Unique Binary Search Trees	Medium	Normal
97	Interleaving String	Hard	Normal
98	Validate Binary Search Tree	Medium	Normal
99	Recover Binary Search Tree	Hard	Normal
100	Same Tree	Easy	Normal
101	Symmetric Tree	Easy	Normal
102	Binary Tree Level Order Traversal	Medium	Normal
103	Binary Tree Zigzag Level Order Traversal	Medium	Normal
104	Maximum Depth of Binary Tree	Easy	Normal
105	Construct Binary Tree from Preorder and Inorder Traversal	Medium	Normal
106	Construct Binary Tree from Inorder and Postorder Traversal	Medium	Normal
107	Binary Tree Level Order Traversal II	Easy	Normal
108	Convert Sorted Array to Binary Search Tree	Easy	Normal
109	Convert Sorted List to Binary Search Tree	Medium	Normal
110	Balanced Binary Tree	Easy	Normal
111	Minimum Depth of Binary Tree	Easy	Normal
112	Path Sum	Easy	Normal
113	Path Sum II	Medium	Normal
114	Flatten Binary Tree to Linked List	Medium	Normal
115	Distinct Subsequences	Hard	Normal
116	Populating Next Right Pointers in Each Node	Medium	Normal
117	Populating Next Right Pointers in Each Node II	Medium	Normal
118	Pascal's Triangle	Easy	Normal
119	Pascal's Triangle II	Easy	Normal
120	Triangle	Medium	Normal
121	Best Time to Buy and Sell Stock	Easy	Normal
122	Best Time to Buy and Sell Stock II	Easy	Normal
123	Best Time to Buy and Sell Stock III	Hard	Normal
124	Binary Tree Maximum Path Sum	Hard	Normal
125	Valid Palindrome	Easy	Normal
126	Word Ladder II	Hard	Normal
127	Word Ladder	Medium	Normal
128	Longest Consecutive Sequence	Hard	Normal
129	Sum Root to Leaf Numbers	Medium	Normal
130	Surrounded Regions	Medium	Normal
131	Palindrome Partitioning	Medium	Normal
132	Palindrome Partitioning II	Hard	Normal
133	Clone Graph	Medium	Normal
134	Gas Station	Medium	Normal
135	Candy	Hard	Normal
136	Single Number	Easy	Normal
137	Single Number II	Medium	Normal
138	Copy List with Random Pointer	Medium	Normal
139	Word Break	Medium	Normal
140	Word Break II	Hard	Normal
141	Linked List Cycle	Easy	Normal
142	Linked List Cycle II	Medium	Normal
143	Reorder List	Medium	Normal
144	Binary Tree Preorder Traversal	Medium	Normal
145	Binary Tree Postorder Traversal	Hard	Normal
146	LRU Cache	Medium	Normal
147	Insertion Sort List	Medium	Normal
148	Sort List	Medium	Normal
149	Max Points on a Line	Hard	Normal
150	Evaluate Reverse Polish Notation	Medium	Normal
151	Reverse Words in a String	Medium	Normal
152	Maximum Product Subarray	Medium	Normal
153	Find Minimum in Rotated Sorted Array	Medium	Normal
154	Find Minimum in Rotated Sorted Array II	Hard	Normal
155	Min Stack	Easy	Normal
156	Binary Tree Upside Down	Medium	Prime
157	Read N Characters Given Read4	Easy	Prime
158	Read N Characters Given Read4 II - Call multiple times	Hard	Prime
159	Longest Substring with At Most Two Distinct Characters	Medium	Prime
160	Intersection of Two Linked Lists	Easy	Normal
161	One Edit Distance	Medium	Prime
162	Find Peak Element	Medium	Normal
163	Missing Ranges	Medium	Prime
164	Maximum Gap	Hard	Normal
165	Compare Version Numbers	Medium	Normal
166	Fraction to Recurring Decimal	Medium	Normal
167	Two Sum II - Input array is sorted	Easy	Normal
168	Excel Sheet Column Title	Easy	Normal
169	Majority Element	Easy	Normal
170	Two Sum III - Data structure design	Easy	Prime
171	Excel Sheet Column Number	Easy	Normal
172	Factorial Trailing Zeroes	Easy	Normal
173	Binary Search Tree Iterator	Medium	Normal
174	Dungeon Game	Hard	Normal
175	Combine Two Tables	Easy	Normal
176	Second Highest Salary	Easy	Normal
177	Nth Highest Salary	Medium	Normal
178	Rank Scores	Medium	Normal
179	Largest Number	Medium	Normal
180	Consecutive Numbers	Medium	Normal
181	Employees Earning More Than Their Managers	Easy	Normal
182	Duplicate Emails	Easy	Normal
183	Customers Who Never Order	Easy	Normal
184	Department Highest Salary	Medium	Normal
185	Department Top Three Salaries	Hard	Normal
186	Reverse Words in a String II	Medium	Prime
187	Repeated DNA Sequences	Medium	Normal
188	Best Time to Buy and Sell Stock IV	Hard	Normal
189	Rotate Array	Easy	Normal
190	Reverse Bits	Easy	Normal
191	Number of 1 Bits	Easy	Normal
192	Word Frequency	Medium	Normal
193	Valid Phone Numbers	Easy	Normal
194	Transpose File	Medium	Normal
195	Tenth Line	Easy	Normal
196	Delete Duplicate Emails	Easy	Normal
197	Rising Temperature	Easy	Normal
198	House Robber	Easy	Normal
199	Binary Tree Right Side View	Medium	Normal
200	Number of Islands	Medium	Normal
201	Bitwise AND of Numbers Range	Medium	Normal
202	Happy Number	Easy	Normal
203	Remove Linked List Elements	Easy	Normal
204	Count Primes	Easy	Normal
205	Isomorphic Strings	Easy	Normal
206	Reverse Linked List	Easy	Normal
207	Course Schedule	Medium	Normal
208	Implement Trie (Prefix Tree)	Medium	Normal
209	Minimum Size Subarray Sum	Medium	Normal
210	Course Schedule II	Medium	Normal
211	Add and Search Word - Data structure design	Medium	Normal
212	Word Search II	Hard	Normal
213	House Robber II	Medium	Normal
214	Shortest Palindrome	Hard	Normal
215	Kth Largest Element in an Array	Medium	Normal
216	Combination Sum III	Medium	Normal
217	Contains Duplicate	Easy	Normal
218	The Skyline Problem	Hard	Normal
219	Contains Duplicate II	Easy	Normal
220	Contains Duplicate III	Medium	Normal
221	Maximal Square	Medium	Normal
222	Count Complete Tree Nodes	Medium	Normal
223	Rectangle Area	Medium	Normal
224	Basic Calculator	Hard	Normal
225	Implement Stack using Queues	Easy	Normal
226	Invert Binary Tree	Easy	Normal
227	Basic Calculator II	Medium	Normal
228	Summary Ranges	Medium	Normal
229	Majority Element II	Medium	Normal
230	Kth Smallest Element in a BST	Medium	Normal
231	Power of Two	Easy	Normal
232	Implement Queue using Stacks	Easy	Normal
233	Number of Digit One	Hard	Normal
234	Palindrome Linked List	Easy	Normal
235	Lowest Common Ancestor of a Binary Search Tree	Easy	Normal
236	Lowest Common Ancestor of a Binary Tree	Medium	Normal
237	Delete Node in a Linked List	Easy	Normal
238	Product of Array Except Self	Medium	Normal
239	Sliding Window Maximum	Hard	Normal
240	Search a 2D Matrix II	Medium	Normal
241	Different Ways to Add Parentheses	Medium	Normal
242	Valid Anagram	Easy	Normal
243	Shortest Word Distance	Easy	Prime
244	Shortest Word Distance II	Medium	Prime
245	Shortest Word Distance III	Medium	Prime
246	Strobogrammatic Number	Easy	Prime
247	Strobogrammatic Number II	Medium	Prime
248	Strobogrammatic Number III	Hard	Prime
249	Group Shifted Strings	Medium	Prime
250	Count Univalue Subtrees	Medium	Prime
251	Flatten 2D Vector	Medium	Prime
252	Meeting Rooms	Easy	Prime
253	Meeting Rooms II	Medium	Prime
254	Factor Combinations	Medium	Prime
255	Verify Preorder Sequence in Binary Search Tree	Medium	Prime
256	Paint House	Easy	Prime
257	Binary Tree Paths	Easy	Normal
258	Add Digits	Easy	Normal
259	3Sum Smaller	Medium	Prime
260	Single Number III	Medium	Normal
261	Graph Valid Tree	Medium	Prime
262	Trips and Users	Hard	Normal
263	Ugly Number	Easy	Normal
264	Ugly Number II	Medium	Normal
265	Paint House II	Hard	Prime
266	Palindrome Permutation	Easy	Prime
267	Palindrome Permutation II	Medium	Prime
268	Missing Number	Easy	Normal
269	Alien Dictionary	Hard	Prime
270	Closest Binary Search Tree Value	Easy	Prime
271	Encode and Decode Strings	Medium	Prime
272	Closest Binary Search Tree Value II	Hard	Prime
273	Integer to English Words	Hard	Normal
274	H-Index	Medium	Normal
275	H-Index II	Medium	Normal
276	Paint Fence	Easy	Prime
277	Find the Celebrity	Medium	Prime
278	First Bad Version	Easy	Normal
279	Perfect Squares	Medium	Normal
280	Wiggle Sort	Medium	Prime
281	Zigzag Iterator	Medium	Prime
282	Expression Add Operators	Hard	Normal
283	Move Zeroes	Easy	Normal
284	Peeking Iterator	Medium	Normal
285	Inorder Successor in BST	Medium	Prime
286	Walls and Gates	Medium	Prime
287	Find the Duplicate Number	Medium	Normal
288	Unique Word Abbreviation	Medium	Prime
289	Game of Life	Medium	Normal
290	Word Pattern	Easy	Normal
291	Word Pattern II	Hard	Prime
292	Nim Game	Easy	Normal
293	Flip Game	Easy	Prime
294	Flip Game II	Medium	Prime
295	Find Median from Data Stream	Hard	Normal
296	Best Meeting Point	Hard	Prime
297	Serialize and Deserialize Binary Tree	Hard	Normal
298	Binary Tree Longest Consecutive Sequence	Medium	Prime
299	Bulls and Cows	Easy	Normal
300	Longest Increasing Subsequence	Medium	Normal
301	Remove Invalid Parentheses	Hard	Normal
302	Smallest Rectangle Enclosing Black Pixels	Hard	Prime
303	Range Sum Query - Immutable	Easy	Normal
304	Range Sum Query 2D - Immutable	Medium	Normal
305	Number of Islands II	Hard	Prime
306	Additive Number	Medium	Normal
307	Range Sum Query - Mutable	Medium	Normal
308	Range Sum Query 2D - Mutable	Hard	Prime
309	Best Time to Buy and Sell Stock with Cooldown	Medium	Normal
310	Minimum Height Trees	Medium	Normal
311	Sparse Matrix Multiplication	Medium	Prime
312	Burst Balloons	Hard	Normal
313	Super Ugly Number	Medium	Normal
314	Binary Tree Vertical Order Traversal	Medium	Prime
315	Count of Smaller Numbers After Self	Hard	Normal
316	Remove Duplicate Letters	Hard	Normal
317	Shortest Distance from All Buildings	Hard	Prime
318	Maximum Product of Word Lengths	Medium	Normal
319	Bulb Switcher	Medium	Normal
320	Generalized Abbreviation	Medium	Prime
321	Create Maximum Number	Hard	Normal
322	Coin Change	Medium	Normal
323	Number of Connected Components in an Undirected Graph	Medium	Prime
324	Wiggle Sort II	Medium	Normal
325	Maximum Size Subarray Sum Equals k	Medium	Prime
326	Power of Three	Easy	Normal
327	Count of Range Sum	Hard	Normal
328	Odd Even Linked List	Medium	Normal
329	Longest Increasing Path in a Matrix	Hard	Normal
330	Patching Array	Hard	Normal
331	Verify Preorder Serialization of a Binary Tree	Medium	Normal
332	Reconstruct Itinerary	Medium	Normal
333	Largest BST Subtree	Medium	Prime
334	Increasing Triplet Subsequence	Medium	Normal
335	Self Crossing	Hard	Normal
336	Palindrome Pairs	Hard	Normal
337	House Robber III	Medium	Normal
338	Counting Bits	Medium	Normal
339	Nested List Weight Sum	Easy	Prime
340	Longest Substring with At Most K Distinct Characters	Hard	Prime
341	Flatten Nested List Iterator	Medium	Normal
342	Power of Four	Easy	Normal
343	Integer Break	Medium	Normal
344	Reverse String	Easy	Normal
345	Reverse Vowels of a String	Easy	Normal
346	Moving Average from Data Stream	Easy	Prime
347	Top K Frequent Elements	Medium	Normal
348	Design Tic-Tac-Toe	Medium	Prime
349	Intersection of Two Arrays	Easy	Normal
350	Intersection of Two Arrays II	Easy	Normal
351	Android Unlock Patterns	Medium	Prime
352	Data Stream as Disjoint Intervals	Hard	Normal
353	Design Snake Game	Medium	Prime
354	Russian Doll Envelopes	Hard	Normal
355	Design Twitter	Medium	Normal
356	Line Reflection	Medium	Prime
357	Count Numbers with Unique Digits	Medium	Normal
358	Rearrange String k Distance Apart	Hard	Prime
359	Logger Rate Limiter	Easy	Prime
360	Sort Transformed Array	Medium	Prime
361	Bomb Enemy	Medium	Prime
362	Design Hit Counter	Medium	Prime
363	Max Sum of Rectangle No Larger Than K	Hard	Normal
364	Nested List Weight Sum II	Medium	Prime
365	Water and Jug Problem	Medium	Normal
366	Find Leaves of Binary Tree	Medium	Prime
367	Valid Perfect Square	Easy	Normal
368	Largest Divisible Subset	Medium	Normal
369	Plus One Linked List	Medium	Prime
370	Range Addition	Medium	Prime
371	Sum of Two Integers	Easy	Normal
372	Super Pow	Medium	Normal
373	Find K Pairs with Smallest Sums	Medium	Normal
374	Guess Number Higher or Lower	Easy	Normal
375	Guess Number Higher or Lower II	Medium	Normal
376	Wiggle Subsequence	Medium	Normal
377	Combination Sum IV	Medium	Normal
378	Kth Smallest Element in a Sorted Matrix	Medium	Normal
379	Design Phone Directory	Medium	Prime
380	Insert Delete GetRandom O(1)	Medium	Normal
381	Insert Delete GetRandom O(1) - Duplicates allowed	Hard	Normal
382	Linked List Random Node	Medium	Normal
383	Ransom Note	Easy	Normal
384	Shuffle an Array	Medium	Normal
385	Mini Parser	Medium	Normal
386	Lexicographical Numbers	Medium	Normal
387	First Unique Character in a String	Easy	Normal
388	Longest Absolute File Path	Medium	Normal
389	Find the Difference	Easy	Normal
390	Elimination Game	Medium	Normal
391	Perfect Rectangle	Hard	Normal
392	Is Subsequence	Easy	Normal
393	UTF-8 Validation	Medium	Normal
394	Decode String	Medium	Normal
395	Longest Substring with At Least K Repeating Characters	Medium	Normal
396	Rotate Function	Medium	Normal
397	Integer Replacement	Medium	Normal
398	Random Pick Index	Medium	Normal
399	Evaluate Division	Medium	Normal
400	Nth Digit	Medium	Normal
401	Binary Watch	Easy	Normal
402	Remove K Digits	Medium	Normal
403	Frog Jump	Hard	Normal
404	Sum of Left Leaves	Easy	Normal
405	Convert a Number to Hexadecimal	Easy	Normal
406	Queue Reconstruction by Height	Medium	Normal
407	Trapping Rain Water II	Hard	Normal
408	Valid Word Abbreviation	Easy	Prime
409	Longest Palindrome	Easy	Normal
410	Split Array Largest Sum	Hard	Normal
411	Minimum Unique Word Abbreviation	Hard	Prime
412	Fizz Buzz	Easy	Normal
413	Arithmetic Slices	Medium	Normal
414	Third Maximum Number	Easy	Normal
415	Add Strings	Easy	Normal
416	Partition Equal Subset Sum	Medium	Normal
417	Pacific Atlantic Water Flow	Medium	Normal
418	Sentence Screen Fitting	Medium	Prime
419	Battleships in a Board	Medium	Normal
420	Strong Password Checker	Hard	Normal
421	Maximum XOR of Two Numbers in an Array	Medium	Normal
422	Valid Word Square	Easy	Prime
423	Reconstruct Original Digits from English	Medium	Normal
424	Longest Repeating Character Replacement	Medium	Normal
425	Word Squares	Hard	Prime
426	Convert Binary Search Tree to Sorted Doubly Linked List	Medium	Prime
427	Construct Quad Tree	Medium	Normal
428	Serialize and Deserialize N-ary Tree	Hard	Prime
429	N-ary Tree Level Order Traversal	Medium	Normal
430	Flatten a Multilevel Doubly Linked List	Medium	Normal
431	Encode N-ary Tree to Binary Tree	Hard	Prime
432	All O`one Data Structure	Hard	Normal
433	Minimum Genetic Mutation	Medium	Normal
434	Number of Segments in a String	Easy	Normal
435	Non-overlapping Intervals	Medium	Normal
436	Find Right Interval	Medium	Normal
437	Path Sum III	Easy	Normal
438	Find All Anagrams in a String	Medium	Normal
439	Ternary Expression Parser	Medium	Prime
440	K-th Smallest in Lexicographical Order	Hard	Normal
441	Arranging Coins	Easy	Normal
442	Find All Duplicates in an Array	Medium	Normal
443	String Compression	Easy	Normal
444	Sequence Reconstruction	Medium	Prime
445	Add Two Numbers II	Medium	Normal
446	Arithmetic Slices II - Subsequence	Hard	Normal
447	Number of Boomerangs	Easy	Normal
448	Find All Numbers Disappeared in an Array	Easy	Normal
449	Serialize and Deserialize BST	Medium	Normal
450	Delete Node in a BST	Medium	Normal
451	Sort Characters By Frequency	Medium	Normal
452	Minimum Number of Arrows to Burst Balloons	Medium	Normal
453	Minimum Moves to Equal Array Elements	Easy	Normal
454	4Sum II	Medium	Normal
455	Assign Cookies	Easy	Normal
456	132 Pattern	Medium	Normal
457	Circular Array Loop	Medium	Normal
458	Poor Pigs	Hard	Normal
459	Repeated Substring Pattern	Easy	Normal
460	LFU Cache	Hard	Normal
461	Hamming Distance	Easy	Normal
462	Minimum Moves to Equal Array Elements II	Medium	Normal
463	Island Perimeter	Easy	Normal
464	Can I Win	Medium	Normal
465	Optimal Account Balancing	Hard	Prime
466	Count The Repetitions	Hard	Normal
467	Unique Substrings in Wraparound String	Medium	Normal
468	Validate IP Address	Medium	Normal
469	Convex Polygon	Medium	Prime
470	Implement Rand10() Using Rand7()	Medium	Normal
471	Encode String with Shortest Length	Hard	Prime
472	Concatenated Words	Hard	Normal
473	Matchsticks to Square	Medium	Normal
474	Ones and Zeroes	Medium	Normal
475	Heaters	Easy	Normal
476	Number Complement	Easy	Normal
477	Total Hamming Distance	Medium	Normal
478	Generate Random Point in a Circle	Medium	Normal
479	Largest Palindrome Product	Hard	Normal
480	Sliding Window Median	Hard	Normal
481	Magical String	Medium	Normal
482	License Key Formatting	Easy	Normal
483	Smallest Good Base	Hard	Normal
484	Find Permutation	Medium	Prime
485	Max Consecutive Ones	Easy	Normal
486	Predict the Winner	Medium	Normal
487	Max Consecutive Ones II	Medium	Prime
488	Zuma Game	Hard	Normal
489	Robot Room Cleaner	Hard	Prime
490	The Maze	Medium	Prime
491	Increasing Subsequences	Medium	Normal
492	Construct the Rectangle	Easy	Normal
493	Reverse Pairs	Hard	Normal
494	Target Sum	Medium	Normal
495	Teemo Attacking	Medium	Normal
496	Next Greater Element I	Easy	Normal
497	Random Point in Non-overlapping Rectangles	Medium	Normal
498	Diagonal Traverse	Medium	Normal
499	The Maze III	Hard	Prime
500	Keyboard Row	Easy	Normal
501	Find Mode in Binary Search Tree	Easy	Normal
502	IPO	Hard	Normal
503	Next Greater Element II	Medium	Normal
504	Base 7	Easy	Normal
505	The Maze II	Medium	Prime
506	Relative Ranks	Easy	Normal
507	Perfect Number	Easy	Normal
508	Most Frequent Subtree Sum	Medium	Normal
509	Fibonacci Number	Easy	Normal
510	Inorder Successor in BST II	Medium	Prime
511	Game Play Analysis I	Easy	Prime
512	Game Play Analysis II	Easy	Prime
513	Find Bottom Left Tree Value	Medium	Normal
514	Freedom Trail	Hard	Normal
515	Find Largest Value in Each Tree Row	Medium	Normal
516	Longest Palindromic Subsequence	Medium	Normal
517	Super Washing Machines	Hard	Normal
518	Coin Change 2	Medium	Normal
519	Random Flip Matrix	Medium	Normal
520	Detect Capital	Easy	Normal
521	Longest Uncommon Subsequence I	Easy	Normal
522	Longest Uncommon Subsequence II	Medium	Normal
523	Continuous Subarray Sum	Medium	Normal
524	Longest Word in Dictionary through Deleting	Medium	Normal
525	Contiguous Array	Medium	Normal
526	Beautiful Arrangement	Medium	Normal
527	Word Abbreviation	Hard	Prime
528	Random Pick with Weight	Medium	Normal
529	Minesweeper	Medium	Normal
530	Minimum Absolute Difference in BST	Easy	Normal
531	Lonely Pixel I	Medium	Prime
532	K-diff Pairs in an Array	Easy	Normal
533	Lonely Pixel II	Medium	Prime
534	Game Play Analysis III	Medium	Prime
535	Encode and Decode TinyURL	Medium	Normal
536	Construct Binary Tree from String	Medium	Prime
537	Complex Number Multiplication	Medium	Normal
538	Convert BST to Greater Tree	Easy	Normal
539	Minimum Time Difference	Medium	Normal
540	Single Element in a Sorted Array	Medium	Normal
541	Reverse String II	Easy	Normal
542	01 Matrix	Medium	Normal
543	Diameter of Binary Tree	Easy	Normal
544	Output Contest Matches	Medium	Prime
545	Boundary of Binary Tree	Medium	Prime
546	Remove Boxes	Hard	Normal
547	Friend Circles	Medium	Normal
548	Split Array with Equal Sum	Medium	Prime
549	Binary Tree Longest Consecutive Sequence II	Medium	Prime
550	Game Play Analysis IV	Medium	Prime
551	Student Attendance Record I	Easy	Normal
552	Student Attendance Record II	Hard	Normal
553	Optimal Division	Medium	Normal
554	Brick Wall	Medium	Normal
555	Split Concatenated Strings	Medium	Prime
556	Next Greater Element III	Medium	Normal
557	Reverse Words in a String III	Easy	Normal
558	Quad Tree Intersection	Medium	Normal
559	Maximum Depth of N-ary Tree	Easy	Normal
560	Subarray Sum Equals K	Medium	Normal
561	Array Partition I	Easy	Normal
562	Longest Line of Consecutive One in Matrix	Medium	Prime
563	Binary Tree Tilt	Easy	Normal
564	Find the Closest Palindrome	Hard	Normal
565	Array Nesting	Medium	Normal
566	Reshape the Matrix	Easy	Normal
567	Permutation in String	Medium	Normal
568	Maximum Vacation Days	Hard	Prime
569	Median Employee Salary	Hard	Prime
570	Managers with at Least 5 Direct Reports	Medium	Prime
571	Find Median Given Frequency of Numbers	Hard	Prime
572	Subtree of Another Tree	Easy	Normal
573	Squirrel Simulation	Medium	Prime
574	Winning Candidate	Medium	Prime
575	Distribute Candies	Easy	Normal
576	Out of Boundary Paths	Medium	Normal
577	Employee Bonus	Easy	Prime
578	Get Highest Answer Rate Question	Medium	Prime
579	Find Cumulative Salary of an Employee	Hard	Prime
580	Count Student Number in Departments	Medium	Prime
581	Shortest Unsorted Continuous Subarray	Easy	Normal
582	Kill Process	Medium	Prime
583	Delete Operation for Two Strings	Medium	Normal
584	Find Customer Referee	Easy	Prime
585	Investments in 2016	Medium	Prime
586	Customer Placing the Largest Number of Orders	Easy	Prime
587	Erect the Fence	Hard	Normal
588	Design In-Memory File System	Hard	Prime
589	N-ary Tree Preorder Traversal	Easy	Normal
590	N-ary Tree Postorder Traversal	Easy	Normal
591	Tag Validator	Hard	Normal
592	Fraction Addition and Subtraction	Medium	Normal
593	Valid Square	Medium	Normal
594	Longest Harmonious Subsequence	Easy	Normal
595	Big Countries	Easy	Normal
596	Classes More Than 5 Students	Easy	Normal
597	Friend Requests I: Overall Acceptance Rate	Easy	Prime
598	Range Addition II	Easy	Normal
599	Minimum Index Sum of Two Lists	Easy	Normal
600	Non-negative Integers without Consecutive Ones	Hard	Normal
601	Human Traffic of Stadium	Hard	Normal
602	Friend Requests II: Who Has the Most Friends	Medium	Prime
603	Consecutive Available Seats	Easy	Prime
604	Design Compressed String Iterator	Easy	Prime
605	Can Place Flowers	Easy	Normal
606	Construct String from Binary Tree	Easy	Normal
607	Sales Person	Easy	Prime
608	Tree Node	Medium	Prime
609	Find Duplicate File in System	Medium	Normal
610	Triangle Judgement	Easy	Prime
611	Valid Triangle Number	Medium	Normal
612	Shortest Distance in a Plane	Medium	Prime
613	Shortest Distance in a Line	Easy	Prime
614	Second Degree Follower	Medium	Prime
615	Average Salary: Departments VS Company	Hard	Prime
616	Add Bold Tag in String	Medium	Prime
617	Merge Two Binary Trees	Easy	Normal
618	Students Report By Geography	Hard	Prime
619	Biggest Single Number	Easy	Prime
620	Not Boring Movies	Easy	Normal
621	Task Scheduler	Medium	Normal
622	Design Circular Queue	Medium	Normal
623	Add One Row to Tree	Medium	Normal
624	Maximum Distance in Arrays	Easy	Prime
625	Minimum Factorization	Medium	Prime
626	Exchange Seats	Medium	Normal
627	Swap Salary
628	Maximum Product of Three Numbers	Easy	Normal
629	K Inverse Pairs Array	Hard	Normal
630	Course Schedule III	Hard	Normal
631	Design Excel Sum Formula	Hard	Prime
632	Smallest Range Covering Elements from K Lists	Hard	Normal
633	Sum of Square Numbers	Easy	Normal
634	Find the Derangement of An Array	Medium	Prime
635	Design Log Storage System	Medium	Prime
636	Exclusive Time of Functions	Medium	Normal
637	Average of Levels in Binary Tree	Easy	Normal
638	Shopping Offers	Medium	Normal
639	Decode Ways II	Hard	Normal
640	Solve the Equation	Medium	Normal
641	Design Circular Deque	Medium	Normal
642	Design Search Autocomplete System	Hard	Prime
643	Maximum Average Subarray I	Easy	Normal
644	Maximum Average Subarray II	Hard	Prime
645	Set Mismatch	Easy	Normal
646	Maximum Length of Pair Chain	Medium	Normal
647	Palindromic Substrings	Medium	Normal
648	Replace Words	Medium	Normal
649	Dota2 Senate	Medium	Normal
650	2 Keys Keyboard	Medium	Normal
651	4 Keys Keyboard	Medium	Prime
652	Find Duplicate Subtrees	Medium	Normal
653	Two Sum IV - Input is a BST	Easy	Normal
654	Maximum Binary Tree	Medium	Normal
655	Print Binary Tree	Medium	Normal
656	Coin Path	Hard	Prime
657	Robot Return to Origin	Easy	Normal
658	Find K Closest Elements	Medium	Normal
659	Split Array into Consecutive Subsequences	Medium	Normal
660	Remove 9	Hard	Prime
661	Image Smoother	Easy	Normal
662	Maximum Width of Binary Tree	Medium	Normal
663	Equal Tree Partition	Medium	Prime
664	Strange Printer	Hard	Normal
665	Non-decreasing Array	Easy	Normal
666	Path Sum IV	Medium	Prime
667	Beautiful Arrangement II	Medium	Normal
668	Kth Smallest Number in Multiplication Table	Hard	Normal
669	Trim a Binary Search Tree	Easy	Normal
670	Maximum Swap	Medium	Normal
671	Second Minimum Node In a Binary Tree	Easy	Normal
672	Bulb Switcher II	Medium	Normal
673	Number of Longest Increasing Subsequence	Medium	Normal
674	Longest Continuous Increasing Subsequence	Easy	Normal
675	Cut Off Trees for Golf Event	Hard	Normal
676	Implement Magic Dictionary	Medium	Normal
677	Map Sum Pairs	Medium	Normal
678	Valid Parenthesis String	Medium	Normal
679	24 Game	Hard	Normal
680	Valid Palindrome II	Easy	Normal
681	Next Closest Time	Medium	Prime
682	Baseball Game	Easy	Normal
683	K Empty Slots	Hard	Prime
684	Redundant Connection	Medium	Normal
685	Redundant Connection II	Hard	Normal
686	Repeated String Match	Easy	Normal
687	Longest Univalue Path	Easy	Normal
688	Knight Probability in Chessboard	Medium	Normal
689	Maximum Sum of 3 Non-Overlapping Subarrays	Hard	Normal
690	Employee Importance	Easy	Normal
691	Stickers to Spell Word	Hard	Normal
692	Top K Frequent Words	Medium	Normal
693	Binary Number with Alternating Bits	Easy	Normal
694	Number of Distinct Islands	Medium	Prime
695	Max Area of Island	Medium	Normal
696	Count Binary Substrings	Easy	Normal
697	Degree of an Array	Easy	Normal
698	Partition to K Equal Sum Subsets	Medium	Normal
699	Falling Squares	Hard	Normal
700	Search in a Binary Search Tree	Easy	Normal
701	Insert into a Binary Search Tree	Medium	Normal
702	Search in a Sorted Array of Unknown Size	Medium	Prime
703	Kth Largest Element in a Stream	Easy	Normal
704	Binary Search	Easy	Normal
705	Design HashSet	Easy	Normal
706	Design HashMap	Easy	Normal
707	Design Linked List	Medium	Normal
708	Insert into a Cyclic Sorted List	Medium	Prime
709	To Lower Case	Easy	Normal
710	Random Pick with Blacklist	Hard	Normal
711	Number of Distinct Islands II	Hard	Prime
712	Minimum ASCII Delete Sum for Two Strings	Medium	Normal
713	Subarray Product Less Than K	Medium	Normal
714	Best Time to Buy and Sell Stock with Transaction Fee	Medium	Normal
715	Range Module	Hard	Normal
716	Max Stack	Easy	Prime
717	1-bit and 2-bit Characters	Easy	Normal
718	Maximum Length of Repeated Subarray	Medium	Normal
719	Find K-th Smallest Pair Distance	Hard	Normal
720	Longest Word in Dictionary	Easy	Normal
721	Accounts Merge	Medium	Normal
722	Remove Comments	Medium	Normal
723	Candy Crush	Medium	Prime
724	Find Pivot Index	Easy	Normal
725	Split Linked List in Parts	Medium	Normal
726	Number of Atoms	Hard	Normal
727	Minimum Window Subsequence	Hard	Prime
728	Self Dividing Numbers	Easy	Normal
729	My Calendar I	Medium	Normal
730	Count Different Palindromic Subsequences	Hard	Normal
731	My Calendar II	Medium	Normal
732	My Calendar III	Hard	Normal
733	Flood Fill	Easy	Normal
734	Sentence Similarity	Easy	Prime
735	Asteroid Collision	Medium	Normal
736	Parse Lisp Expression	Hard	Normal
737	Sentence Similarity II	Medium	Prime
738	Monotone Increasing Digits	Medium	Normal
739	Daily Temperatures	Medium	Normal
740	Delete and Earn	Medium	Normal
741	Cherry Pickup	Hard	Normal
742	Closest Leaf in a Binary Tree	Medium	Prime
743	Network Delay Time	Medium	Normal
744	Find Smallest Letter Greater Than Target	Easy	Normal
745	Prefix and Suffix Search	Hard	Normal
746	Min Cost Climbing Stairs	Easy	Normal
747	Largest Number At Least Twice of Others	Easy	Normal
748	Shortest Completing Word	Easy	Normal
749	Contain Virus	Hard	Normal
750	Number Of Corner Rectangles	Medium	Prime
751	IP to CIDR	Easy	Prime
752	Open the Lock	Medium	Normal
753	Cracking the Safe	Hard	Normal
754	Reach a Number	Medium	Normal
755	Pour Water	Medium	Prime
756	Pyramid Transition Matrix	Medium	Normal
757	Set Intersection Size At Least Two	Hard	Normal
758	Bold Words in String	Easy	Prime
759	Employee Free Time	Hard	Prime
760	Find Anagram Mappings	Easy	Prime
761	Special Binary String	Hard	Normal
762	Prime Number of Set Bits in Binary Representation	Easy	Normal
763	Partition Labels	Medium	Normal
764	Largest Plus Sign	Medium	Normal
765	Couples Holding Hands	Hard	Normal
766	Toeplitz Matrix	Easy	Normal
767	Reorganize String	Medium	Normal
768	Max Chunks To Make Sorted II	Hard	Normal
769	Max Chunks To Make Sorted	Medium	Normal
770	Basic Calculator IV	Hard	Normal
771	Jewels and Stones	Easy	Normal
772	Basic Calculator III	Hard	Prime
773	Sliding Puzzle	Hard	Normal
774	Minimize Max Distance to Gas Station	Hard	Prime
775	Global and Local Inversions	Medium	Normal
776	Split BST	Medium	Prime
777	Swap Adjacent in LR String	Medium	Normal
778	Swim in Rising Water	Hard	Normal
779	K-th Symbol in Grammar	Medium	Normal
780	Reaching Points	Hard	Normal
781	Rabbits in Forest	Medium	Normal
782	Transform to Chessboard	Hard	Normal
783	Minimum Distance Between BST Nodes	Easy	Normal
784	Letter Case Permutation	Easy	Normal
785	Is Graph Bipartite?	Medium	Normal
786	K-th Smallest Prime Fraction	Hard	Normal
787	Cheapest Flights Within K Stops	Medium	Normal
788	Rotated Digits	Easy	Normal
789	Escape The Ghosts	Medium	Normal
790	Domino and Tromino Tiling	Medium	Normal
791	Custom Sort String	Medium	Normal
792	Number of Matching Subsequences	Medium	Normal
793	Preimage Size of Factorial Zeroes Function	Hard	Normal
794	Valid Tic-Tac-Toe State	Medium	Normal
795	Number of Subarrays with Bounded Maximum	Medium	Normal
796	Rotate String	Easy	Normal
797	All Paths From Source to Target	Medium	Normal
798	Smallest Rotation with Highest Score	Hard	Normal
799	Champagne Tower	Medium	Normal
800	Similar RGB Color	Easy	Prime
801	Minimum Swaps To Make Sequences Increasing	Medium	Normal
802	Find Eventual Safe States	Medium	Normal
803	Bricks Falling When Hit	Hard	Normal
804	Unique Morse Code Words	Easy	Normal
805	Split Array With Same Average	Hard	Normal
806	Number of Lines To Write String	Easy	Normal
807	Max Increase to Keep City Skyline	Medium	Normal
808	Soup Servings	Medium	Normal
809	Expressive Words	Medium	Normal
810	Chalkboard XOR Game	Hard	Normal
811	Subdomain Visit Count	Easy	Normal
812	Largest Triangle Area	Easy	Normal
813	Largest Sum of Averages	Medium	Normal
814	Binary Tree Pruning	Medium	Normal
815	Bus Routes	Hard	Normal
816	Ambiguous Coordinates	Medium	Normal
817	Linked List Components	Medium	Normal
818	Race Car	Hard	Normal
819	Most Common Word	Easy	Normal
820	Short Encoding of Words	Medium	Normal
821	Shortest Distance to a Character	Easy	Normal
822	Card Flipping Game	Medium	Normal
823	Binary Trees With Factors	Medium	Normal
824	Goat Latin	Easy	Normal
825	Friends Of Appropriate Ages	Medium	Normal
826	Most Profit Assigning Work	Medium	Normal
827	Making A Large Island	Hard	Normal
828	Unique Letter String	Hard	Normal
829	Consecutive Numbers Sum	Hard	Normal
830	Positions of Large Groups	Easy	Normal
831	Masking Personal Information	Medium	Normal
832	Flipping an Image	Easy	Normal
833	Find And Replace in String	Medium	Normal
834	Sum of Distances in Tree	Hard	Normal
835	Image Overlap	Medium	Normal
836	Rectangle Overlap	Easy	Normal
837	New 21 Game	Medium	Normal
838	Push Dominoes	Medium	Normal
839	Similar String Groups	Hard	Normal
840	Magic Squares In Grid	Easy	Normal
841	Keys and Rooms	Medium	Normal
842	Split Array into Fibonacci Sequence	Medium	Normal
843	Guess the Word	Hard	Normal
844	Backspace String Compare	Easy	Normal
845	Longest Mountain in Array	Medium	Normal
846	Hand of Straights	Medium	Normal
847	Shortest Path Visiting All Nodes	Hard	Normal
848	Shifting Letters	Medium	Normal
849	Maximize Distance to Closest Person	Easy	Normal
850	Rectangle Area II	Hard	Normal
851	Loud and Rich	Medium	Normal
852	Peak Index in a Mountain Array	Easy	Normal
853	Car Fleet	Medium	Normal
854	K-Similar Strings	Hard	Normal
855	Exam Room	Medium	Normal
856	Score of Parentheses	Medium	Normal
857	Minimum Cost to Hire K Workers	Hard	Normal
858	Mirror Reflection	Medium	Normal
859	Buddy Strings	Easy	Normal
860	Lemonade Change	Easy	Normal
861	Score After Flipping Matrix	Medium	Normal
862	Shortest Subarray with Sum at Least K	Hard	Normal
863	All Nodes Distance K in Binary Tree	Medium	Normal
864	Shortest Path to Get All Keys	Hard	Normal
865	Smallest Subtree with all the Deepest Nodes	Medium	Normal
866	Prime Palindrome	Medium	Normal
867	Transpose Matrix	Easy	Normal
868	Binary Gap	Easy	Normal
869	Reordered Power of 2	Medium	Normal
870	Advantage Shuffle	Medium	Normal
871	Minimum Number of Refueling Stops	Hard	Normal
872	Leaf-Similar Trees	Easy	Normal
873	Length of Longest Fibonacci Subsequence	Medium	Normal
874	Walking Robot Simulation	Easy	Normal
875	Koko Eating Bananas	Medium	Normal
876	Middle of the Linked List	Easy	Normal
877	Stone Game	Medium	Normal
878	Nth Magical Number	Hard	Normal
879	Profitable Schemes	Hard	Normal
880	Decoded String at Index	Medium	Normal
881	Boats to Save People	Medium	Normal
882	Reachable Nodes In Subdivided Graph	Hard	Normal
883	Projection Area of 3D Shapes	Easy	Normal
884	Uncommon Words from Two Sentences	Easy	Normal
885	Spiral Matrix III	Medium	Normal
886	Possible Bipartition	Medium	Normal
887	Super Egg Drop	Hard	Normal
888	Fair Candy Swap	Easy	Normal
889	Construct Binary Tree from Preorder and Postorder Traversal	Medium	Normal
890	Find and Replace Pattern	Medium	Normal
891	Sum of Subsequence Widths	Hard	Normal
892	Surface Area of 3D Shapes	Easy	Normal
893	Groups of Special-Equivalent Strings	Easy	Normal
894	All Possible Full Binary Trees	Medium	Normal
895	Maximum Frequency Stack	Hard	Normal
896	Monotonic Array	Easy	Normal
897	Increasing Order Search Tree	Easy	Normal
898	Bitwise ORs of Subarrays	Medium	Normal
899	Orderly Queue	Hard	Normal
900	RLE Iterator	Medium	Normal
901	Online Stock Span	Medium	Normal
902	Numbers At Most N Given Digit Set	Hard	Normal
903	Valid Permutations for DI Sequence	Hard	Normal
904	Fruit Into Baskets	Medium	Normal
905	Sort Array By Parity	Easy	Normal
906	Super Palindromes	Hard	Normal
907	Sum of Subarray Minimums	Medium	Normal
908	Smallest Range I	Easy	Normal
909	Snakes and Ladders	Medium	Normal
910	Smallest Range II	Medium	Normal
911	Online Election	Medium	Normal
912	Sort an Array	Medium	Normal
913	Cat and Mouse	Hard	Normal
914	X of a Kind in a Deck of Cards	Easy	Normal
915	Partition Array into Disjoint Intervals	Medium	Normal
916	Word Subsets	Medium	Normal
917	Reverse Only Letters	Easy	Normal
918	Maximum Sum Circular Subarray	Medium	Normal
919	Complete Binary Tree Inserter	Medium	Normal
920	Number of Music Playlists	Hard	Normal
921	Minimum Add to Make Parentheses Valid	Medium	Normal
922	Sort Array By Parity II	Easy	Normal
923	3Sum With Multiplicity	Medium	Normal
924	Minimize Malware Spread	Hard	Normal
925	Long Pressed Name	Easy	Normal
926	Flip String to Monotone Increasing	Medium	Normal
927	Three Equal Parts	Hard	Normal
928	Minimize Malware Spread II	Hard	Normal
929	Unique Email Addresses	Easy	Normal
930	Binary Subarrays With Sum	Medium	Normal
931	Minimum Falling Path Sum	Medium	Normal
932	Beautiful Array	Medium	Normal
933	Number of Recent Calls	Easy	Normal
934	Shortest Bridge	Medium	Normal
935	Knight Dialer	Medium	Normal
936	Stamping The Sequence	Hard	Normal
937	Reorder Data in Log Files	Easy	Normal
938	Range Sum of BST	Easy	Normal
939	Minimum Area Rectangle	Medium	Normal
940	Distinct Subsequences II	Hard	Normal
941	Valid Mountain Array	Easy	Normal
942	DI String Match	Easy	Normal
943	Find the Shortest Superstring	Hard	Normal
944	Delete Columns to Make Sorted	Easy	Normal
945	Minimum Increment to Make Array Unique	Medium	Normal
946	Validate Stack Sequences	Medium	Normal
947	Most Stones Removed with Same Row or Column	Medium	Normal
948	Bag of Tokens	Medium	Normal
949	Largest Time for Given Digits	Easy	Normal
950	Reveal Cards In Increasing Order	Medium	Normal
951	Flip Equivalent Binary Trees	Medium	Normal
952	Largest Component Size by Common Factor	Hard	Normal
953	Verifying an Alien Dictionary	Easy	Normal
954	Array of Doubled Pairs	Medium	Normal
955	Delete Columns to Make Sorted II	Medium	Normal
956	Tallest Billboard	Hard	Normal
957	Prison Cells After N Days	Medium	Normal
958	Check Completeness of a Binary Tree	Medium	Normal
959	Regions Cut By Slashes	Medium	Normal
960	Delete Columns to Make Sorted III	Hard	Normal
961	N-Repeated Element in Size 2N Array	Easy	Normal
962	Maximum Width Ramp	Medium	Normal
963	Minimum Area Rectangle II	Medium	Normal
964	Least Operators to Express Number	Hard	Normal
965	Univalued Binary Tree	Easy	Normal
966	Vowel Spellchecker	Medium	Normal
967	Numbers With Same Consecutive Differences	Medium	Normal
968	Binary Tree Cameras	Hard	Normal
969	Pancake Sorting	Medium	Normal
970	Powerful Integers	Easy	Normal
971	Flip Binary Tree To Match Preorder Traversal	Medium	Normal
972	Equal Rational Numbers	Hard	Normal
973	K Closest Points to Origin	Medium	Normal
974	Subarray Sums Divisible by K	Medium	Normal
975	Odd Even Jump	Hard	Normal
976	Largest Perimeter Triangle	Easy	Normal
977	Squares of a Sorted Array	Easy	Normal
978	Longest Turbulent Subarray	Medium	Normal
979	Distribute Coins in Binary Tree	Medium	Normal
980	Unique Paths III	Hard	Normal
981	Time Based Key-Value Store	Medium	Normal
982	Triples with Bitwise AND Equal To Zero	Hard	Normal
983	Minimum Cost For Tickets	Medium	Normal
984	String Without AAA or BBB	Medium	Normal
985	Sum of Even Numbers After Queries	Easy	Normal
986	Interval List Intersections	Medium	Normal
987	Vertical Order Traversal of a Binary Tree	Medium	Normal
988	Smallest String Starting From Leaf	Medium	Normal
989	Add to Array-Form of Integer	Easy	Normal
990	Satisfiability of Equality Equations	Medium	Normal
991	Broken Calculator	Medium	Normal
992	Subarrays with K Different Integers	Hard	Normal
993	Cousins in Binary Tree	Easy	Normal
994	Rotting Oranges	Easy	Normal
995	Minimum Number of K Consecutive Bit Flips	Hard	Normal
996	Number of Squareful Arrays	Hard	Normal
997	Find the Town Judge	Easy	Normal
998	Maximum Binary Tree II	Medium	Normal
999	Available Captures for Rook	Easy	Normal
1000	Minimum Cost to Merge Stones	Hard	Normal
1001	Grid Illumination	Hard	Normal
1002	Find Common Characters	Easy	Normal
1003	Check If Word Is Valid After Substitutions	Medium	Normal
1004	Max Consecutive Ones III	Medium	Normal
1005	Maximize Sum Of Array After K Negations	Easy	Normal
1006	Clumsy Factorial	Medium	Normal
1007	Minimum Domino Rotations For Equal Row	Medium	Normal
1008	Construct Binary Search Tree from Preorder Traversal	Medium	Normal
1009	Complement of Base 10 Integer	Easy	Normal
1010	Pairs of Songs With Total Durations Divisible by 60	Easy	Normal
1011	Capacity To Ship Packages Within D Days	Medium	Normal
1012	Numbers With Repeated Digits	Hard	Normal
1013	Partition Array Into Three Parts With Equal Sum	Easy	Normal
1014	Best Sightseeing Pair	Medium	Normal
1015	Smallest Integer Divisible by K	Medium	Normal
1016	Binary String With Substrings Representing 1 To N	Medium	Normal
1017	Convert to Base -2	Medium	Normal
1018	Binary Prefix Divisible By 5	Easy	Normal
1019	Next Greater Node In Linked List	Medium	Normal
1020	Number of Enclaves	Medium	Normal
1021	Remove Outermost Parentheses	Easy	Normal
1022	Sum of Root To Leaf Binary Numbers	Easy	Normal
1023	Camelcase Matching	Medium	Normal
1024	Video Stitching	Medium	Normal
1025	Divisor Game	Easy	Normal
1026	Maximum Difference Between Node and Ancestor	Medium	Normal
1027	Longest Arithmetic Sequence	Medium	Normal
1028	Recover a Tree From Preorder Traversal	Hard	Normal
1029	Two City Scheduling	Easy	Normal
1030	Matrix Cells in Distance Order	Easy	Normal
1031	Maximum Sum of Two Non-Overlapping Subarrays	Medium	Normal
1032	Stream of Characters	Hard	Normal
1033	Moving Stones Until Consecutive	Easy	Normal
1034	Coloring A Border	Medium	Normal
1035	Uncrossed Lines	Medium	Normal
1036	Escape a Large Maze	Hard	Normal
1037	Valid Boomerang	Easy	Normal
1038	Binary Search Tree to Greater Sum Tree	Medium	Normal
1039	Minimum Score Triangulation of Polygon	Medium	Normal
1040	Moving Stones Until Consecutive II	Medium	Normal
1041	Robot Bounded In Circle	Medium	Normal
1042	Flower Planting With No Adjacent	Easy	Normal
1043	Partition Array for Maximum Sum	Medium	Normal
1044	Longest Duplicate Substring	Hard	Normal
1045	Customers Who Bought All Products	Medium	Prime
1046	Last Stone Weight	Easy	Normal
1047	Remove All Adjacent Duplicates In String	Easy	Normal
1048	Longest String Chain	Medium	Normal
1049	Last Stone Weight II	Medium	Normal
1050	Actors and Directors Who Cooperated At Least Three Times	Easy	Prime
1051	Height Checker	Easy	Normal
1052	Grumpy Bookstore Owner	Medium	Normal
1053	Previous Permutation With One Swap	Medium	Normal
1054	Distant Barcodes	Medium	Normal
1055	Shortest Way to Form String	Medium	Prime
1056	Confusing Number	Easy	Prime
1057	Campus Bikes	Medium	Prime
1058	Minimize Rounding Error to Meet Target	Medium	Prime
1059	All Paths from Source Lead to Destination	Medium	Prime
1060	Missing Element in Sorted Array	Medium	Prime
1061	Lexicographically Smallest Equivalent String	Medium	Prime
1062	Longest Repeating Substring	Medium	Prime
1063	Number of Valid Subarrays	Hard	Prime
1064	Fixed Point	Easy	Prime
1065	Index Pairs of a String	Easy	Prime
1066	Campus Bikes II	Medium	Prime
1067	Digit Count in Range	Hard	Prime
1068	Product Sales Analysis I	Easy	Prime
1069	Product Sales Analysis II	Easy	Prime
1070	Product Sales Analysis III	Medium	Prime
1071	Greatest Common Divisor of Strings	Easy	Normal
1072	Flip Columns For Maximum Number of Equal Rows	Medium	Normal
1073	Adding Two Negabinary Numbers	Medium	Normal
1074	Number of Submatrices That Sum to Target	Hard	Normal
1075	Project Employees I	Easy	Prime
1076	Project Employees II	Easy	Prime
1077	Project Employees III	Medium	Prime
1078	Occurrences After Bigram	Easy	Normal
1079	Letter Tile Possibilities	Medium	Normal
1080	Insufficient Nodes in Root to Leaf Paths	Medium	Normal
1081	Smallest Subsequence of Distinct Characters	Medium	Normal
1082	Sales Analysis I	Easy	Prime
1083	Sales Analysis II	Easy	Prime
1084	Sales Analysis III	Easy	Prime
1085	Sum of Digits in the Minimum Number	Easy	Prime
1086	High Five	Easy	Prime
1087	Brace Expansion	Medium	Prime
1088	Confusing Number II	Hard	Prime
1089	Duplicate Zeros	Easy	Normal
1090	Largest Values From Labels	Medium	Normal
1091	Shortest Path in Binary Matrix	Medium	Normal
1092	Shortest Common Supersequence	Hard	Normal
1093	Statistics from a Large Sample	Medium	Normal
1094	Car Pooling	Medium	Normal
1095	Find in Mountain Array	Hard	Normal
1096	Brace Expansion II	Hard	Normal
1097	Game Play Analysis V	Hard	Prime
1098	Unpopular Books	Medium	Prime
1099	Two Sum Less Than K	Easy	Prime
1100	Find K-Length Substrings With No Repeated Characters	Medium	Prime
1101	The Earliest Moment When Everyone Become Friends	Medium	Prime
1102	Path With Maximum Minimum Value	Medium	Prime
1103	Distribute Candies to People	Easy	Normal
1104	Path In Zigzag Labelled Binary Tree	Medium	Normal
1105	Filling Bookcase Shelves	Medium	Normal
1106	Parsing A Boolean Expression	Hard	Normal
1107	New Users Daily Count	Medium	Prime
1108	Defanging an IP Address	Easy	Normal
1109	Corporate Flight Bookings	Medium	Normal
1110	Delete Nodes And Return Forest	Medium	Normal
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	Medium	Normal
1112	Highest Grade For Each Student	Medium	Prime
1113	Reported Posts	Easy	Prime
1114	Print in Order	Easy	Normal
1115	Print FooBar Alternately	Medium	Normal
1116	Print Zero Even Odd	Medium	Normal
1117	Building H2O	Medium	Normal
1118	Number of Days in a Month	Easy	Prime
1119	Remove Vowels from a String	Easy	Prime
1120	Maximum Average Subtree	Medium	Prime
1121	Divide Array Into Increasing Sequences	Hard	Prime
1122	Relative Sort Array	Easy	Normal
1123	Lowest Common Ancestor of Deepest Leaves	Medium	Normal
1124	Longest Well-Performing Interval	Medium	Normal
1125	Smallest Sufficient Team	Hard	Normal
1126	Active Businesses	Medium	Prime
1127	User Purchase Platform	Hard	Prime
1128	Number of Equivalent Domino Pairs	Easy	Normal
1129	Shortest Path with Alternating Colors	Medium	Normal
1130	Minimum Cost Tree From Leaf Values	Medium	Normal
1131	Maximum of Absolute Value Expression	Medium	Normal
1132	Reported Posts II	Medium	Prime
1133	Largest Unique Number	Easy	Prime
1134	Armstrong Number	Easy	Prime
1135	Connecting Cities With Minimum Cost	Medium	Prime
1136	Parallel Courses	Hard	Prime
1137	N-th Tribonacci Number	Easy	Normal
1138	Alphabet Board Path	Medium	Normal
1139	Largest 1-Bordered Square	Medium	Normal
1140	Stone Game II	Medium	Normal
1141	User Activity for the Past 30 Days I	Easy	Prime
1142	User Activity for the Past 30 Days II	Easy	Prime
1143	Longest Common Subsequence	Medium	Normal
1144	Decrease Elements To Make Array Zigzag	Medium	Normal
1145	Binary Tree Coloring Game	Medium	Normal
1146	Snapshot Array	Medium	Normal
1147	Longest Chunked Palindrome Decomposition	Hard	Normal
1148	Article Views I	Easy	Prime
1149	Article Views II	Medium	Prime
1150	Check If a Number Is Majority Element in a Sorted Array	Easy	Prime
1151	Minimum Swaps to Group All 1's Together	Medium	Prime
1152	Analyze User Website Visit Pattern	Medium	Prime
1153	String Transforms Into Another String	Hard	Prime
1154	Day of the Year	Easy	Normal
1155	Number of Dice Rolls With Target Sum	Medium	Normal
1156	Swap For Longest Repeated Character Substring	Medium	Normal
1157	Online Majority Element In Subarray	Hard	Normal
1158	Market Analysis I	Medium	Prime
1159	Market Analysis II	Hard	Prime
1160	Find Words That Can Be Formed by Characters	Easy	Normal
1161	Maximum Level Sum of a Binary Tree	Medium	Normal
1162	As Far from Land as Possible	Medium	Normal
1163	Last Substring in Lexicographical Order	Hard	Normal
1164	Product Price at a Given Date	Medium	Prime
1165	Single-Row Keyboard	Easy	Prime
1166	Design File System	Medium	Prime
1167	Minimum Cost to Connect Sticks	Medium	Prime
1168	Optimize Water Distribution in a Village	Hard	Prime
1169	Invalid Transactions	Medium	Normal
1170	Compare Strings by Frequency of the Smallest Character	Easy	Normal
1171	Remove Zero Sum Consecutive Nodes from Linked List	Medium	Normal
1172	Dinner Plate Stacks	Hard	Normal
1173	Immediate Food Delivery I	Easy	Prime
1174	Immediate Food Delivery II	Medium	Prime
1175	Prime Arrangements	Easy	Normal
1176	Diet Plan Performance	Easy	Prime
1177	Can Make Palindrome from Substring	Medium	Normal
1178	Number of Valid Words for Each Puzzle	Hard	Normal
1179	Reformat Department Table	Easy	Normal
1180	Count Substrings with Only One Distinct Letter	Easy	Prime
1181	Before and After Puzzle	Medium	Prime
1182	Shortest Distance to Target Color	Medium	Prime
1183	Maximum Number of Ones	Hard	Prime
1184	Distance Between Bus Stops	Easy	Normal
1185	Day of the Week	Easy	Normal
1186	Maximum Subarray Sum with One Deletion	Medium	Normal
1187	Make Array Strictly Increasing	Hard	Normal
1188	Design Bounded Blocking Queue	Medium	Prime
1189	Maximum Number of Balloons	Easy	Normal
1190	Reverse Substrings Between Each Pair of Parentheses	Medium	Normal
1191	K-Concatenation Maximum Sum	Medium	Normal
1192	Critical Connections in a Network	Hard	Normal
1193	Monthly Transactions I	Medium	Prime
1194	Tournament Winners	Hard	Prime
1195	Fizz Buzz Multithreaded	Medium	Normal
1196	How Many Apples Can You Put into the Basket	Easy	Prime
1197	Minimum Knight Moves	Medium	Prime
1198	Find Smallest Common Element in All Rows	Medium	Prime
1199	Minimum Time to Build Blocks	Hard	Prime
1200	Minimum Absolute Difference	Easy	Normal
1201	Ugly Number III	Medium	Normal
1202	Smallest String With Swaps	Medium	Normal
1203	Sort Items by Groups Respecting Dependencies	Hard	Normal
1204	Last Person to Fit in the Elevator	Medium	Prime
1205	Monthly Transactions II	Medium	Prime
1206	Design Skiplist	Hard	Normal
1207	Unique Number of Occurrences	Easy	Normal
1208	Get Equal Substrings Within Budget	Medium	Normal
1209	Remove All Adjacent Duplicates in String II	Medium	Normal
1210	Minimum Moves to Reach Target with Rotations	Hard	Normal
1211	Queries Quality and Percentage	Easy	Prime
1212	Team Scores in Football Tournament	Medium	Prime
1213	Intersection of Three Sorted Arrays	Easy	Prime
1214	Two Sum BSTs	Medium	Prime
1215	Stepping Numbers	Medium	Prime
1216	Valid Palindrome III	Hard	Prime
1217	Play with Chips	Easy	Normal
1218	Longest Arithmetic Subsequence of Given Difference	Medium	Normal
1219	Path with Maximum Gold	Medium	Normal
1220	Count Vowels Permutation	Hard	Normal
1221	Split a String in Balanced Strings	Easy	Normal
1222	Queens That Can Attack the King	Medium	Normal
1223	Dice Roll Simulation	Medium	Normal
1224	Maximum Equal Frequency	Hard	Normal
1225	Report Contiguous Dates	Hard	Prime
1226	The Dining Philosophers	Medium	Normal
1227	Airplane Seat Assignment Probability	Medium	Normal
1228	Missing Number In Arithmetic Progression	Easy	Prime
1229	Meeting Scheduler	Medium	Prime
1230	Toss Strange Coins	Medium	Prime
1231	Divide Chocolate	Hard	Prime
1232	Check If It Is a Straight Line	Easy	Normal
1233	Remove Sub-Folders from the Filesystem	Medium	Normal
1234	Replace the Substring for Balanced String	Medium	Normal
1235	Maximum Profit in Job Scheduling	Hard	Normal
1236	Web Crawler	Medium	Prime
1237	Find Positive Integer Solution for a Given Equation	Easy	Normal
1238	Circular Permutation in Binary Representation	Medium	Normal
1239	Maximum Length of a Concatenated String with Unique Characters	Medium	Normal
1240	Tiling a Rectangle with the Fewest Squares	Hard	Normal
1241	Number of Comments per Post	Easy	Prime
1242	Web Crawler Multithreaded	Medium	Prime
1243	Array Transformation	Easy	Prime
1244	Design A Leaderboard	Medium	Prime
1245	Tree Diameter	Medium	Prime
1246	Palindrome Removal	Hard	Prime
1247	Minimum Swaps to Make Strings Equal	Medium	Normal
1248	Count Number of Nice Subarrays	Medium	Normal
1249	Minimum Remove to Make Valid Parentheses	Medium	Normal
1250	Check If It Is a Good Array	Hard	Normal
1251	Average Selling Price	Easy	Prime
1252	Cells with Odd Values in a Matrix	Easy	Normal
1253	Reconstruct a 2-Row Binary Matrix	Medium	Normal
1254	Number of Closed Islands	Medium	Normal
1255	Maximum Score Words Formed by Letters	Hard	Normal
1256	Encode Number	Medium	Prime
1257	Smallest Common Region	Medium	Prime
1258	Synonymous Sentences	Medium	Prime
1259	Handshakes That Don't Cross	Hard	Prime
1260	Shift 2D Grid	Easy	Normal
1261	Find Elements in a Contaminated Binary Tree	Medium	Normal
1262	Greatest Sum Divisible by Three	Medium	Normal
1263	Minimum Moves to Move a Box to Their Target Location	Hard	Normal
1264	Page Recommendations	Medium	Prime
1265	Print Immutable Linked List in Reverse	Medium	Prime
1266	Minimum Time Visiting All Points	Easy	Normal
1267	Count Servers that Communicate	Medium	Normal
1268	Search Suggestions System	Medium	Normal
1269	Number of Ways to Stay in the Same Place After Some Steps	Hard	Normal
1270	All People Report to the Given Manager	Medium	Prime
1271	Hexspeak	Easy	Prime
1272	Remove Interval	Medium	Prime
1273	Delete Tree Nodes	Medium	Prime
1274	Number of Ships in a Rectangle	Hard	Prime
1275	Find Winner on a Tic Tac Toe Game	Easy	Normal
1276	Number of Burgers with No Waste of Ingredients	Medium	Normal
1277	Count Square Submatrices with All Ones	Medium	Normal
1278	Palindrome Partitioning III	Hard	Normal
1279	Traffic Light Controlled Intersection	Easy	Prime
1280	Students and Examinations	Easy	Prime
1281	Subtract the Product and Sum of Digits of an Integer	Easy	Normal
1282	Group the People Given the Group Size They Belong To	Medium	Normal
1283	Find the Smallest Divisor Given a Threshold	Medium	Normal
1284	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	Hard	Normal
1285	Find the Start and End Number of Continuous Ranges	Medium	Prime
1286	Iterator for Combination	Medium	Normal
1287	Element Appearing More Than 25% In Sorted Array	Easy	Normal
1288	Remove Covered Intervals	Medium	Normal
1289	Minimum Falling Path Sum II	Hard	Normal
1290	Convert Binary Number in a Linked List to Integer	Easy	Normal
1291	Sequential Digits	Medium	Normal
1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	Medium	Normal
1293	Shortest Path in a Grid with Obstacles Elimination	Hard	Normal
1294	Weather Type in Each Country	Easy	Prime
1295	Find Numbers with Even Number of Digits	Easy	Normal
1296	Divide Array in Sets of K Consecutive Numbers	Medium	Normal
1297	Maximum Number of Occurrences of a Substring	Medium	Normal
1298	Maximum Candies You Can Get from Boxes	Hard	Normal
1299	Replace Elements with Greatest Element on Right Side	Easy	Normal
1300	Sum of Mutated Array Closest to Target	Medium	Normal
1301	Number of Paths with Max Score	Hard	Normal
1302	Deepest Leaves Sum	Medium	Normal
1303	Find the Team Size	Easy	Prime
1304	Find N Unique Integers Sum up to Zero	Easy	Normal
1305	All Elements in Two Binary Search Trees	Medium	Normal
1306	Jump Game III	Medium	Normal
1307	Verbal Arithmetic Puzzle	Hard	Normal
1308	Running Total for Different Genders	Medium	Prime
1309	Decrypt String from Alphabet to Integer Mapping	Easy	Normal
1310	XOR Queries of a Subarray	Medium	Normal
1311	Get Watched Videos by Your Friends	Medium	Normal
1312	Minimum Insertion Steps to Make a String Palindrome	Hard	Normal
1313	Decompress Run-Length Encoded List	Easy	Normal
1314	Matrix Block Sum	Medium	Normal
1315	Sum of Nodes with Even-Valued Grandparent	Medium	Normal
1316	Distinct Echo Substrings	Hard	Normal
1317	Convert Integer to the Sum of Two No-Zero Integers	Easy	Normal
1318	Minimum Flips to Make a OR b Equal to c	Medium	Normal
1319	Number of Operations to Make Network Connected	Medium	Normal
1320	Minimum Distance to Type a Word Using Two Fingers	Hard	Normal
1321	Restaurant Growth	Medium	Prime
1322	1322. Ads Performance	Easy	Prime
1323	1323. Maximum 69 Number	Easy	Normal
1324	1324. Print Words Vertically	Medium	Normal
1325	1325. Delete Leaves With a Given Value	Medium	Normal
1326	1326. Minimum Number of Taps to Open to Water a Garden	Hard	Normal
1327	List the Products Ordered in a Period	Easy	Prime
1328	Break a Palindrome	Medium	Normal
1329	Sort the Matrix Diagonally	Medium	Normal
1330	Reverse Subarray To Maximize Array Value	Hard	Normal
1331	Rank Transform of an Array	Easy	Normal
1332	Remove Palindromic Subsequences	Easy	Normal
1333	Filter Restaurants by Vegan-Friendly, Price and Distance	Medium	Normal
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	Medium	Normal
1335	Minimum Difficulty of a Job Schedule	Hard	Normal
1336	Number of Transactions per Visit	Hard	Prime
1337	The K Weakest Rows in a Matrix	Easy	Normal
1338	Reduce Array Size to The Half	Medium	Normal
1339	Maximum Product of Splitted Binary Tree	Medium	Normal
1340	Jump Game V	Hard	Normal
1341	Movie Rating	Medium	Prime
1342	Number of Steps to Reduce a Number to Zero	Easy	Normal
1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Medium	Normal
1344	Angle Between Hands of a Clock	Medium	Normal
1345	Jump Game IV	Hard	Normal
1346	Check If N and Its Double Exist	Easy	Normal
1347	Minimum Number of Steps to Make Two Strings Anagram	Medium	Normal
1348	Tweet Counts Per Frequency	Medium	Normal
1349	Maximum Students Taking Exam	Hard	Normal
1350	Students With Invalid Departments	Easy	Prime
1351	Count Negative Numbers in a Sorted Matrix	Easy	Normal
1352	Product of the Last K Numbers	Medium	Normal
1353	Maximum Number of Events That Can Be Attended	Medium	Normal
1354	Construct Target Array With Multiple Sums	Hard	Normal
1355	Activity Participants	Medium	Prime
1356	Sort Integers by The Number of 1 Bits	Easy	Normal
1357	Apply Discount Every n Orders	Medium	Normal
1358	Number of Substrings Containing All Three Characters	Medium	Normal
1359	Count All Valid Pickup and Delivery Options	Hard	Normal
1360	Number of Days Between Two Dates	Easy	Normal
1361	Validate Binary Tree Nodes	Medium	Normal
1362	Closest Divisors	Medium	Normal
1363	Largest Multiple of Three	Hard	Normal
1364	Number of Trusted Contacts of a Customer	Medium	Prime
1365	How Many Numbers Are Smaller Than the Current Number	Easy	Normal
1366	Rank Teams by Votes	Medium	Normal
1367	Linked List in Binary Tree	Medium	Normal
1368	Minimum Cost to Make at Least One Valid Path in a Grid	Hard	Normal
1369	Get the Second Most Recent Activity	Hard	Prime
1370	Increasing Decreasing String	Easy	Normal
1371	Find the Longest Substring Containing Vowels in Even Counts	Medium	Normal
1372	Longest ZigZag Path in a Binary Tree	Medium	Normal
1373	Maximum Sum BST in Binary Tree	Hard	Normal
1374	Generate a String With Characters That Have Odd Counts	Easy	Normal
1375	Bulb Switcher III	Medium	Normal
1376	Time Needed to Inform All Employees	Medium	Normal
1377	Frog Position After T Seconds	Hard	Normal
1378	Replace Employee ID With The Unique Identifier	Easy	Prime
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Medium	Normal
1380	Lucky Numbers in a Matrix	Easy	Normal
1381	Design a Stack With Increment Operation	Medium	Normal
1382	Balance a Binary Search Tree	Medium	Normal
1383	Maximum Performance of a Team	Hard	Normal
1384	Total Sales Amount by Year	Hard	Prime
1385	Find the Distance Value Between Two Arrays	Easy	Normal
1386	Cinema Seat Allocation	Medium	Normal
1387	Sort Integers by The Power Value	Medium	Normal
1388	Pizza With 3n Slices	Hard	Normal
1389	Create Target Array in the Given Order	Easy	Normal
1390	Four Divisors	Medium	Normal
1391	Check if There is a Valid Path in a Grid	Medium	Normal
1392	Longest Happy Prefix	Hard	Normal
1393	Capital Gain/Loss	Medium	Prime
1394	Find Lucky Integer in an Array	Easy	Normal
1395	Count Number of Teams	Medium	Normal
1396	Design Underground System	Medium	Normal
1397	Find All Good Strings	Hard	Normal
1398	Customers Who Bought Products A and B but Not C	Medium	Prime
1399	Count Largest Group	Easy	Normal
1400	Construct K Palindrome Strings	Medium	Normal
1401	Circle and Rectangle Overlapping	Medium	Normal
1402	Reducing Dishes	Hard	Normal
1403	Minimum Subsequence in Non-Increasing Order	Easy	Normal
1404	Number of Steps to Reduce a Number in Binary Representation to One	Medium	Normal
1405	Longest Happy String	Medium	Normal
1406	Stone Game III	Hard	Normal
1407	Top Travellers	Easy	Prime
1408	String Matching in an Array	Easy	Normal
1409	Queries on a Permutation With Key	Medium	Normal
1410	HTML Entity Parser	Medium	Normal
1411	Number of Ways to Paint N × 3 Grid	Hard	Normal
1412	Find the Quiet Students in All Exams	Hard	Prime
1413	Minimum Value to Get Positive Step by Step Sum	Easy	Normal
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Medium	Normal
1415	The k-th Lexicographical String of All Happy Strings of Length n	Medium	Normal
1416	Restore The Array	Hard	Normal
1417	Reformat The String	Easy	Normal
1418	Display Table of Food Orders in a Restaurant	Medium	Normal
1419	Minimum Number of Frogs Croaking	Medium	Normal
1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	Hard	Normal
1421	NPV Queries	Medium	Prime
1422	Maximum Score After Splitting a String	Easy	Normal
1423	Maximum Points You Can Obtain from Cards	Medium	Normal
1424	Diagonal Traverse II	Medium	Normal
1425	Constrained Subset Sum	Hard	Normal
1426	Counting Elements	Easy	Prime
1427	Perform String Shifts	Easy	Prime
1428	Leftmost Column with at Least a One	Medium	Prime
1429	First Unique Number	Medium	Prime
1430	Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	Medium	Prime
1431	Kids With the Greatest Number of Candies	Easy	Normal
1432	Max Difference You Can Get From Changing an Integer	Medium	Normal
1433	Check If a String Can Break Another String	Medium	Normal
1434	Number of Ways to Wear Different Hats to Each Other	Hard	Normal
1435	Create a Session Bar Chart	Easy	Prime
1436	Destination City	Easy	Normal
1437	Check If All 1's Are at Least Length K Places Away	Medium	Normal
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium	Normal
1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	Hard	Normal
1440	Evaluate Boolean Expression	Medium	Prime
1441	Build an Array With Stack Operations	Easy	Normal
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Medium	Normal
1443	Minimum Time to Collect All Apples in a Tree	Medium	Normal
1444	Number of Ways of Cutting a Pizza	Hard	Normal
1445	Apples & Oranges	Medium	Prime
1446	Consecutive Characters	Easy	Normal
1447	Simplified Fractions	Medium	Normal
1448	Count Good Nodes in Binary Tree	Medium	Normal
1449	Form Largest Integer With Digits That Add up to Target	Hard	Normal
1450	Number of Students Doing Homework at a Given Time	Easy	Normal
1451	Rearrange Words in a Sentence	Medium	Normal
1452	People Whose List of Favorite Companies Is Not a Subset of Another List	Medium	Normal
1453	Maximum Number of Darts Inside of a Circular Dartboard	Hard	Normal
1454	Active Users	Medium	Prime
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	Easy	Normal
1456	Maximum Number of Vowels in a Substring of Given Length	Medium	Normal
1457	Pseudo-Palindromic Paths in a Binary Tree	Medium	Normal
1458	Max Dot Product of Two Subsequences	Hard	Normal
1459	Rectangles Area	Medium	Prime
1460	Make Two Arrays Equal by Reversing Sub-arrays	Easy	Normal
1461	Check If a String Contains All Binary Codes of Size K	Medium	Normal
1462	Course Schedule IV	Medium	Normal
1463	Cherry Pickup II	Hard	Normal
1464	Maximum Product of Two Elements in an Array	Easy	Normal
1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	Medium	Normal
1466	Reorder Routes to Make All Paths Lead to the City Zero	Medium	Normal
1467	Probability of a Two Boxes Having The Same Number of Distinct Balls	Hard	Normal
1468	Calculate Salaries	Medium	Prime
1469	Find All the Lonely Nodes	Easy	Prime
1470	Shuffle the Array	Easy	Normal
1471	The k Strongest Values in an Array	Medium	Normal
1472	Design Browser History	Medium	Normal
1473	Paint House III	Hard	Normal
1474	Delete N Nodes After M Nodes of a Linked List	Easy	Prime
1475	Final Prices With a Special Discount in a Shop	Easy	Normal
1476	Subrectangle Queries	Medium	Normal
1477	Find Two Non-overlapping Sub-arrays Each With Target Sum	Medium	Normal
1478	Allocate Mailboxes	Hard	Normal
1479	Sales by Day of the Week	Hard	Prime
1480	Running Sum of 1d Array	Easy	Normal
1481	Least Number of Unique Integers after K Removals	Medium	Normal
1482	Minimum Number of Days to Make m Bouquets	Medium	Normal
1483	Kth Ancestor of a Tree Node	Hard	Normal
1484	Group Sold Products By The Date	Easy	Prime
1485	Clone Binary Tree With Random Pointer	Medium	Prime
1486	XOR Operation in an Array	Easy	Normal
1487	Making File Names Unique	Medium	Normal
1488	Avoid Flood in The City	Medium	Normal
1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	Hard	Normal
1490	Clone N-ary Tree	Medium	Prime
1491	Average Salary Excluding the Minimum and Maximum Salary	Easy	Normal
1492	The kth Factor of n	Medium	Normal
1493	Longest Subarray of 1's After Deleting One Element	Medium	Normal
1494	Parallel Courses II	Hard	Normal
1495	Friendly Movies Streamed Last Month	Easy	Prime
1496	Path Crossing	Easy	Normal
1497	Check If Array Pairs Are Divisible by k	Medium	Normal
1498	Number of Subsequences That Satisfy the Given Sum Condition	Medium	Normal
1499	Max Value of Equation	Hard	Normal
1500	Design a File Sharing System	Medium	Prime
1501	Countries You Can Safely Invest In	Medium	Prime
1502	Can Make Arithmetic Progression From Sequence	Easy	Normal
1503	Last Moment Before All Ants Fall Out of a Plank	Medium	Normal
1504	Count Submatrices With All Ones	Medium	Normal
1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	Hard	Normal
1506	Find Root of N-Ary Tree	Medium	Prime
1507	Reformat Date	Easy	Normal
1508	Range Sum of Sorted Subarray Sums	Medium	Normal
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	Medium	Normal
1510	Stone Game IV	Hard	Normal
1511	Customer Order Frequency	Easy	Prime
1512	Number of Good Pairs	Easy	Normal
1513	Number of Substrings With Only 1s	Medium	Normal
1514	Path with Maximum Probability	Medium	Normal
1515	Best Position for a Service Centre	Hard	Normal
1516	Move Sub-Tree of N-Ary Tree	Hard	Prime
1517	Find Users With Valid E-Mails	Easy	Prime
1518	Water Bottles	Easy	Normal
1519	Number of Nodes in the Sub-Tree With the Same Label	Medium	Normal
1520	Maximum Number of Non-Overlapping Substrings	Hard	Normal
1521	Find a Value of a Mysterious Function Closest to Target	Hard	Normal
1522	Diameter of N-Ary Tree	Medium	Prime
1523	Count Odd Numbers in an Interval Range	Easy	Normal
1524	Number of Sub-arrays With Odd Sum	Medium	Normal
1525	Number of Good Ways to Split a String	Medium	Normal
1526	Minimum Number of Increments on Subarrays to Form a Target Array	Hard	Normal
1527	Patients With a Condition	Easy	Prime
1528	Shuffle String	Easy	Normal
1529	Bulb Switcher IV	Medium	Normal
1530	Number of Good Leaf Nodes Pairs	Medium	Normal
1531	String Compression II	Hard	Normal
1532	The Most Recent Three Orders	Medium	Prime
1533	Find the Index of the Large Integer	Medium	Prime
1534	Count Good Triplets	Easy	Normal
1535	Find the Winner of an Array Game	Medium	Normal
1536	Minimum Swaps to Arrange a Binary Grid	Medium	Normal
1537	Get the Maximum Score	Hard	Normal
1538	Guess the Majority in a Hidden Array	Medium	Prime
1539	Kth Missing Positive Number	Easy	Normal
1540	Can Convert String in K Moves	Medium	Normal
1541	Minimum Insertions to Balance a Parentheses String	Medium	Normal
1542	Find Longest Awesome Substring	Hard	Normal
1543	Fix Product Name Format	Easy	Prime
1544	Make The String Great	Easy	Normal
1545	Find Kth Bit in Nth Binary String	Medium	Normal
1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	Medium	Normal
1547	Minimum Cost to Cut a Stick	Hard	Normal
1548	The Most Similar Path in a Graph	Hard	Prime
1549	The Most Recent Orders for Each Product	Medium	Prime
1550	Three Consecutive Odds	Easy	Normal
1551	Minimum Operations to Make Array Equal	Medium	Normal
1552	Magnetic Force Between Two Balls	Medium	Normal
1553	Minimum Number of Days to Eat N Oranges	Hard	Normal
1554	Strings Differ by One Character	Medium	Prime
1555	Bank Account Summary	Medium	Prime
1556	Thousand Separator	Easy	Normal
1557	Minimum Number of Vertices to Reach All Nodes	Medium	Normal
1558	Minimum Numbers of Function Calls to Make Target Array	Medium	Normal
1559	Detect Cycles in 2D Grid	Hard	Normal
1560	Most Visited Sector in a Circular Track	Easy	Normal
1561	Maximum Number of Coins You Can Get	Medium	Normal
1562	Find Latest Group of Size M	Medium	Normal
1563	Stone Game V	Hard	Normal
1564	Put Boxes Into the Warehouse I	Medium	Prime
1565	Unique Orders and Customers Per Month	Easy	Prime
1566	Detect Pattern of Length M Repeated K or More Times	Easy	Normal
1567	Maximum Length of Subarray With Positive Product	Medium	Normal
1568	Minimum Number of Days to Disconnect Island	Medium	Normal
1569	Number of Ways to Reorder Array to Get Same BST	Hard	Normal
1570	Dot Product of Two Sparse Vectors	Medium	Prime
1571	Warehouse Manager	Easy	Prime
1572	Matrix Diagonal Sum	Easy	Normal
1573	Number of Ways to Split a String	Medium	Normal
1574	Shortest Subarray to be Removed to Make Array Sorted	Medium	Normal
1575	Count All Possible Routes	Hard	Normal
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	Easy	Normal
1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Medium	Normal
1578	Minimum Deletion Cost to Avoid Repeating Letters	Medium	Normal
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Hard	Normal
1580	Put Boxes Into the Warehouse II	Medium	Prime
1581	Customer Who Visited but Did Not Make Any Transactions	Easy	Prime
1582	Special Positions in a Binary Matrix	Easy	Normal
1583	Count Unhappy Friends	Medium	Normal
1584	Min Cost to Connect All Points	Medium	Normal
1585	Check If String Is Transformable With Substring Sort Operations	Hard	Normal
1586	Binary Search Tree Iterator II	Medium	Prime
1587	Bank Account Summary II	Easy	Prime
1588	Sum of All Odd Length Subarrays	Easy	Normal
1589	Maximum Sum Obtained of Any Permutation	Medium	Normal
1590	Make Sum Divisible by P	Medium	Normal
1591	Strange Printer II	Hard	Normal
1592	Rearrange Spaces Between Words	Easy	Normal
1593	Split a String Into the Max Number of Unique Substrings	Medium	Normal
1594	Maximum Non Negative Product in a Matrix	Medium	Normal
1595	Minimum Cost to Connect Two Groups of Points	Hard	Normal
1596	The Most Frequently Ordered Products for Each Customer	Medium	Prime
1597	Build Binary Expression Tree From Infix Expression	Medium	Prime
1598	Crawler Log Folder	Easy	Normal
1599	Maximum Profit of Operating a Centennial Wheel	Medium	Normal
1600	Throne Inheritance	Medium	Normal
1601	Maximum Number of Achievable Transfer Requests	Hard	Normal
1602	Find Nearest Right Node in Binary Tree	Medium	Prime
1603	Design Parking System	Easy	Normal
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	Medium	Normal
1605	Find Valid Matrix Given Row and Column Sums	Medium	Normal
1606	Find Servers That Handled Most Number of Requests	Hard	Normal
1607	Sellers With No Sales	Easy	Prime
1608	Special Array With X Elements Greater Than or Equal X	Easy	Normal
1609	Even Odd Tree	Medium	Normal
1610	Maximum Number of Visible Points	Medium	Normal
1611	Minimum One Bit Operations to Make Integers Zero	Hard	Normal
1612	Check If Two Expression Trees are Equivalent	Medium	Prime
1613	Find the Missing IDs	Medium	Prime
1614	Maximum Nesting Depth of the Parentheses	Easy	Normal
1615	Maximal Network Rank	Medium	Normal
1616	Split Two Strings to Make Palindrome	Medium	Normal
1617	Count Subtrees With Max Distance Between Cities	Hard	Normal
1618	Maximum Font to Fit a Sentence in a Screen	Medium	Prime
1619	Mean of Array After Removing Some Elements	Easy	Normal
1620	Coordinate With Maximum Network Quality	Medium	Normal
1621	Number of Sets of K Non-Overlapping Line Segments	Medium	Normal
1622	Fancy Sequence	Hard	Normal
1623	All Valid Triplets That Can Represent a Country	Easy	Prime
1624	Largest Substring Between Two Equal Characters	Easy	Normal
1625	Lexicographically Smallest String After Applying Operations	Medium	Normal
1626	Best Team With No Conflicts	Medium	Normal
1627	Graph Connectivity With Threshold	Hard	Normal
1628	Design an Expression Tree With Evaluate Function	Medium	Prime
1629	Slowest Key	Easy	Normal
1630	Arithmetic Subarrays	Medium	Normal
1631	Path With Minimum Effort	Medium	Normal
1632	Rank Transform of a Matrix	Hard	Normal
1633	Percentage of Users Attended a Contest	Easy	Prime
1634	Add Two Polynomials Represented as Linked Lists	Medium	Prime
1635	Hopper Company Queries I	Hard	Prime
1636	Sort Array by Increasing Frequency	Easy	Normal
1637	Widest Vertical Area Between Two Points Containing No Points	Medium	Normal
1638	Count Substrings That Differ by One Character	Medium	Normal
1639	Number of Ways to Form a Target String Given a Dictionary	Hard	Normal
1640	Check Array Formation Through Concatenation	Easy	Normal
1641	Count Sorted Vowel Strings	Medium	Normal
1642	Furthest Building You Can Reach	Medium	Normal
1643	Kth Smallest Instructions	Hard	Normal
1644	Lowest Common Ancestor of a Binary Tree II	Medium	Prime
1645	Hopper Company Queries II	Hard	Prime
1646	Get Maximum in Generated Array	Easy	Normal
1647	Minimum Deletions to Make Character Frequencies Unique	Medium	Normal
1648	Sell Diminishing-Valued Colored Balls	Medium	Normal
1649	Create Sorted Array through Instructions	Hard	Normal
1650	Lowest Common Ancestor of a Binary Tree III	Medium	Prime
1651	Hopper Company Queries III	Hard	Prime
1652	Defuse the Bomb	Easy	Normal
1653	Minimum Deletions to Make String Balanced	Medium	Normal
1654	Minimum Jumps to Reach Home	Medium	Normal
1655	Distribute Repeating Integers	Hard	Normal
1656	Design an Ordered Stream	Easy	Normal
1657	Determine if Two Strings Are Close	Medium	Normal
1658	Minimum Operations to Reduce X to Zero	Medium	Normal
1659	Maximize Grid Happiness	Hard	Normal
1660	Correct a Binary Tree	Medium	Prime
1661	Average Time of Process per Machine	Easy	Prime
1662	Check If Two String Arrays are Equivalent	Easy	Normal
1663	Smallest String With A Given Numeric Value	Medium	Normal
1664	Ways to Make a Fair Array	Medium	Normal
1665	Minimum Initial Energy to Finish Tasks	Hard	Normal
1666	Change the Root of a Binary Tree	Medium	Prime
1667	Fix Names in a Table	Easy	Prime
1668	Maximum Repeating Substring	Easy	Normal
1669	Merge In Between Linked Lists	Medium	Normal
1670	Design Front Middle Back Queue	Medium	Normal
1671	Minimum Number of Removals to Make Mountain Array	Hard	Normal
1672	Richest Customer Wealth	Easy	Normal
1673	Find the Most Competitive Subsequence	Medium	Normal
1674	Minimum Moves to Make Array Complementary	Medium	Normal
1675	Minimize Deviation in Array	Hard	Normal
1676	Lowest Common Ancestor of a Binary Tree IV	Medium	Prime
1677	Product's Worth Over Invoices	Easy	Prime
1678	Goal Parser Interpretation	Easy	Normal
1679	Max Number of K-Sum Pairs	Medium	Normal
1680	Concatenation of Consecutive Binary Numbers	Medium	Normal
1681	Minimum Incompatibility	Hard	Normal
1682	Longest Palindromic Subsequence II	Medium	Prime
1683	Invalid Tweets	Easy	Prime
1684	Count the Number of Consistent Strings	Easy	Normal
1685	Sum of Absolute Differences in a Sorted Array	Medium	Normal
1686	Stone Game VI	Medium	Normal
1687	Delivering Boxes from Storage to Ports	Hard	Normal
1688	Count of Matches in Tournament	Easy	Normal
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Medium	Normal
1690	Stone Game VII	Medium	Normal
1691	Maximum Height by Stacking Cuboids	Hard	Normal
1692	Count Ways to Distribute Candies	Hard	Prime
1693	Daily Leads and Partners	Easy	Prime
1694	Reformat Phone Number	Easy	Normal
1695	Maximum Erasure Value	Medium	Normal
1696	Jump Game VI	Medium	Normal
1697	Checking Existence of Edge Length Limited Paths	Hard	Normal
1698	Number of Distinct Substrings in a String	Medium	Prime
1699	Number of Calls Between Two Persons	Medium	Prime
1700	Number of Students Unable to Eat Lunch	Easy	Normal
1701	Average Waiting Time	Medium	Normal
1702	Maximum Binary String After Change	Medium	Normal
1703	Minimum Adjacent Swaps for K Consecutive Ones	Hard	Normal
1704	Determine if String Halves Are Alike	Easy	Normal
1705	Maximum Number of Eaten Apples	Medium	Normal
1706	Where Will the Ball Fall	Medium	Normal
1707	Maximum XOR With an Element From Array	Hard	Normal
1708	Largest Subarray Length K	Easy	Prime
1709	Biggest Window Between Visits	Medium	Prime
1710	Maximum Units on a Truck	Easy	Normal
1711	Count Good Meals	Medium	Normal
1712	Ways to Split Array Into Three Subarrays	Medium	Normal
1713	Minimum Operations to Make a Subsequence	Hard	Normal
1714	Sum Of Special Evenly-Spaced Elements In Array	Hard	Prime
1715	Count Apples and Oranges	Medium	Prime
1716	Calculate Money in Leetcode Bank	Easy	Normal
1717	Maximum Score From Removing Substrings	Medium	Normal
1718	Construct the Lexicographically Largest Valid Sequence	Medium	Normal
1719	Number Of Ways To Reconstruct A Tree	Hard	Normal
1720	Decode XORed Array	Easy	Normal
1721	Swapping Nodes in a Linked List	Hard	Normal
1722	Minimize Hamming Distance After Swap Operations	Medium	Normal
1723	Find Minimum Time to Finish All Jobs	Hard	Normal
1724	Checking Existence of Edge Length Limited Paths II	Hard	Prime
1725	Number Of Rectangles That Can Form The Largest Square	Easy	Normal
1726	Tuple with Same Product	Medium	Normal
1727	Largest Submatrix With Rearrangements	Medium	Normal
1728	Cat and Mouse II	Hard	Normal
1729	Find Followers Count	Easy	Prime
1730	Shortest Path to Get Food	Medium	Prime
1731	The Number of Employees Which Report to Each Employee	Easy	Prime
1732	Find the Highest Altitude	Easy	Normal
1733	Minimum Number of People to Teach	Medium	Normal
1734	Decode XORed Permutation	Medium	Normal
1735	Count Ways to Make Array With Product	Hard	Normal
1736	Latest Time by Replacing Hidden Digits	Easy	Normal
1737	Change Minimum Characters to Satisfy One of Three Conditions	Medium	Normal
1738	Find Kth Largest XOR Coordinate Value	Medium	Normal
1739	Building Boxes	Hard	Normal
1740	Find Distance in a Binary Tree	Medium	Prime
1741	Find Total Time Spent by Each Employee	Easy	Prime
1742	Maximum Number of Balls in a Box	Easy	Normal
1743	Restore the Array From Adjacent Pairs	Medium	Normal
1744	Can You Eat Your Favorite Candy on Your Favorite Day?	Medium	Normal
1745	Palindrome Partitioning IV	Hard	Normal
1746	Maximum Subarray Sum After One Operation	Medium	Prime
1747	Leetflex Banned Accounts	Medium	Prime
1748	Sum of Unique Elements	Easy	Normal
1749	Maximum Absolute Sum of Any Subarray	Medium	Normal
1750	Minimum Length of String After Deleting Similar Ends	Medium	Normal
1751	Maximum Number of Events That Can Be Attended II	Hard	Normal
1752	Check if Array Is Sorted and Rotated	Easy	Normal
1753	Maximum Score From Removing Stones	Medium	Normal
1754	Largest Merge Of Two Strings	Medium	Normal
1755	Closest Subsequence Sum	Hard	Normal
1756	Design Most Recently Used Queue	Medium	Prime
1757	Recyclable and Low Fat Products	Easy	Prime
1758	Minimum Changes To Make Alternating Binary String	Easy	Normal
1759	Count Number of Homogenous Substrings	Medium	Normal
1760	Minimum Limit of Balls in a Bag	Medium	Normal
1761	Minimum Degree of a Connected Trio in a Graph	Hard	Normal
1762	Buildings With an Ocean View	Medium	Prime
1763	Longest Nice Substring	Easy	Normal
1764	Form Array by Concatenating Subarrays of Another Array	Medium	Normal
1765	Map of Highest Peak	Medium	Normal
1766	Tree of Coprimes	Hard	Normal
1767	Find the Subtasks That Did Not Execute	Hard	Prime
1768	Merge Strings Alternately	Easy	Normal
1769	Minimum Number of Operations to Move All Balls to Each Box	Medium	Normal
1770	Maximum Score from Performing Multiplication Operations	Medium	Normal
1771	Maximize Palindrome Length From Subsequences	Hard	Normal
1772	Sort Features by Popularity	Medium	Prime
1773	Count Items Matching a Rule	Easy	Normal
1774	Closest Dessert Cost	Medium	Normal
1775	Equal Sum Arrays With Minimum Number of Operations	Medium	Normal
1776	Car Fleet II	Hard	Normal
1777	Product's Price for Each Store	Easy	Prime
1778	Shortest Path in a Hidden Grid	Medium	Prime
1779	Find Nearest Point That Has the Same X or Y Coordinate	Easy	Normal
1780	Check if Number is a Sum of Powers of Three	Medium	Normal
1781	Sum of Beauty of All Substrings	Medium	Normal
1782	Count Pairs Of Nodes	Hard	Normal
1783	Grand Slam Titles	Medium	Prime
1784	Check if Binary String Has at Most One Segment of Ones	Easy	Normal
1785	Minimum Elements to Add to Form a Given Sum	Medium	Normal
1786	Number of Restricted Paths From First to Last Node	Medium	Normal
1787	Make the XOR of All Segments Equal to Zero	Hard	Normal
1788	Maximize the Beauty of the Garden	Hard	Prime
1789	Primary Department for Each Employee	Easy	Prime
1790	Check if One String Swap Can Make Strings Equal	Easy	Normal
1791	Find Center of Star Graph	Medium	Normal
1792	Maximum Average Pass Ratio	Medium	Normal
1793	Maximum Score of a Good Subarray	Hard	Normal
1794	Count Pairs of Equal Substrings With Minimum Difference	Medium	Prime
1795	Rearrange Products Table	Easy	Prime
1796	Second Largest Digit in a String	Easy	Normal
1797	Design Authentication Manager	Medium	Normal
1798	Maximum Number of Consecutive Values You Can Make	Medium	Normal
1799	Maximize Score After N Operations	Hard	Normal
1800	Maximum Ascending Subarray Sum	Easy	Normal
1801	Number of Orders in the Backlog	Medium	Normal
1802	Maximum Value at a Given Index in a Bounded Array	Medium	Normal
1803	Count Pairs With XOR in a Range	Hard	Normal
1804	Implement Trie II (Prefix Tree)	Medium	Prime
1805	Number of Different Integers in a String	Easy	Normal
1806	Minimum Number of Operations to Reinitialize a Permutation	Medium	Normal
1807	Evaluate the Bracket Pairs of a String	Medium	Normal
1808	Maximize Number of Nice Divisors	Hard	Normal
1809	Ad-Free Sessions	Easy	Prime
1810	Minimum Path Cost in a Hidden Grid	Medium	Prime
1811	Find Interview Candidates	Medium	Prime
1812	Determine Color of a Chessboard Square	Easy	Normal
1813	Sentence Similarity III	Medium	Normal
1814	Count Nice Pairs in an Array	Medium	Normal
1815	Maximum Number of Groups Getting Fresh Donuts	Hard	Normal
1816	Truncate Sentence	Easy	Normal
1817	Finding the Users Active Minutes	Medium	Normal
1818	Minimum Absolute Sum Difference	Medium	Normal
1819	Number of Different Subsequences GCDs	Hard	Normal
1820	Maximum Number of Accepted Invitations	Medium	Prime
1821	Find Customers With Positive Revenue this Year	Easy	Prime
1822	Sign of the Product of an Array	Easy	Normal
1823	Find the Winner of the Circular Game	Medium	Normal
1824	Minimum Sideway Jumps	Medium	Normal
1825	Finding MK Average	Hard	Normal
1826	Faulty Sensor	Easy	Prime
1827	Minimum Operations to Make the Array Increasing	Easy	Normal
1828	Queries on Number of Points Inside a Circle	Medium	Normal
1829	Maximum XOR for Each Query	Medium	Normal
1830	Minimum Number of Operations to Make String Sorted	Hard	Normal
1831	Maximum Transaction Each Day	Medium	Prime
1832	Check if the Sentence Is Pangram	Easy	Normal
1833	Maximum Ice Cream Bars	Medium	Normal
1834	Single-Threaded CPU	Medium	Normal
1835	Find XOR Sum of All Pairs Bitwise AND	Hard	Normal
1836	Remove Duplicates From an Unsorted Linked List	Medium	Prime
1837	Sum of Digits in Base K	Easy	Normal
1838	Frequency of the Most Frequent Element	Medium	Normal
1839	Longest Substring Of All Vowels in Order	Medium	Normal
1840	Maximum Building Height	Hard	Normal
1841	League Statistics	Medium	Prime
1842	Next Palindrome Using Same Digits	Hard	Prime
1843	Suspicious Bank Accounts	Medium	Prime
1844	Replace All Digits with Characters	Easy	Normal
1845	Seat Reservation Manager	Medium	Normal
1846	Maximum Element After Decreasing and Rearranging	Medium	Normal
1847	Closest Room	Hard	Normal
1848	Minimum Distance to the Target Element	Easy	Normal
1849	Splitting a String Into Descending Consecutive Values	Medium	Normal
1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	Medium	Normal
1851	Minimum Interval to Include Each Query	Hard	Normal
1852	Distinct Numbers in Each Subarray	Medium	Prime
1853	Convert Date Format	Easy	Prime
1854	Maximum Population Year	Easy	Normal
1855	Maximum Distance Between a Pair of Values	Medium	Normal
1856	Maximum Subarray Min-Product	Medium	Normal
1857	Largest Color Value in a Directed Graph	Hard	Normal