My LeetCode Record

{ %%%%%%%%%%%%%%%%%%%%%%%%------------------------------------} 40.5%   475/1172

ID	Title	Difficulty	Status
1	Two Sum	Easy	Accepted
2	Add Two Numbers	Medium	Accepted
3	Longest Substring Without Repeating Characters	Medium	Accepted
4	Median of Two Sorted Arrays	Hard	Accepted
5	Longest Palindromic Substring	Medium	Accepted
6	ZigZag Conversion	Medium	Accepted
7	Reverse Integer	Easy	Accepted
8	String to Integer (atoi)	Medium
9	Palindrome Number	Easy	Accepted
10	Regular Expression Matching	Hard	Accepted
11	Container With Most Water	Medium	Accepted
12	Integer to Roman	Medium	Accepted
13	Roman to Integer	Easy	Accepted
14	Longest Common Prefix	Easy	Accepted
15	3Sum	Medium	Accepted
16	3Sum Closest	Medium	Accepted
17	Letter Combinations of a Phone Number	Medium	Accepted
18	4Sum	Medium	Accepted
19	Remove Nth Node From End of List	Medium	Accepted
20	Valid Parentheses	Easy	Accepted
21	Merge Two Sorted Lists	Easy	Accepted
22	Generate Parentheses	Medium	Accepted
23	Merge k Sorted Lists	Hard	Accepted
24	Swap Nodes in Pairs	Medium	Accepted
25	Reverse Nodes in k-Group	Hard	Accepted
26	Remove Duplicates from Sorted Array	Easy	Accepted
27	Remove Element	Easy	Accepted
28	Implement strStr()	Easy	Accepted
29	Divide Two Integers	Medium	Accepted
30	Substring with Concatenation of All Words	Hard
31	Next Permutation	Medium	Accepted
32	Longest Valid Parentheses	Hard	Accepted
33	Search in Rotated Sorted Array	Medium	Accepted
34	Find First and Last Position of Element in Sorted Array	Medium	Accepted
35	Search Insert Position	Easy	Accepted
36	Valid Sudoku	Medium	Accepted
37	Sudoku Solver	Hard	Accepted
38	Count and Say	Easy	Accepted
39	Combination Sum	Medium	Accepted
40	Combination Sum II	Medium	Accepted
41	First Missing Positive	Hard	Accepted
42	Trapping Rain Water	Hard	Accepted
43	Multiply Strings	Medium	Accepted
44	Wildcard Matching	Hard	Accepted
45	Jump Game II	Hard	Accepted
46	Permutations	Medium	Accepted
47	Permutations II	Medium	Accepted
48	Rotate Image	Medium	Accepted
49	Group Anagrams	Medium	Accepted
50	Pow(x, n)	Medium	Accepted
51	N-Queens	Hard	Accepted
52	N-Queens II	Hard	Accepted
53	Maximum Subarray	Easy	Accepted
54	Spiral Matrix	Medium	Accepted
55	Jump Game	Medium	Accepted
56	Merge Intervals	Medium	Accepted
57	Insert Interval	Hard	Accepted
58	Length of Last Word	Easy	Accepted
59	Spiral Matrix II	Medium	Accepted
60	Permutation Sequence	Medium	Accepted
61	Rotate List	Medium	Accepted
62	Unique Paths	Medium	Accepted
63	Unique Paths II	Medium	Accepted
64	Minimum Path Sum	Medium	Accepted
65	Valid Number	Hard	Accepted
66	Plus One	Easy	Accepted
67	Add Binary	Easy	Accepted
68	Text Justification	Hard	Accepted
69	Sqrt(x)	Easy	Accepted
70	Climbing Stairs	Easy	Accepted
71	Simplify Path	Medium	Accepted
72	Edit Distance	Hard	Accepted
73	Set Matrix Zeroes	Medium	Accepted
74	Search a 2D Matrix	Medium	Accepted
75	Sort Colors	Medium	Accepted
76	Minimum Window Substring	Hard	Accepted
77	Combinations	Medium	Accepted
78	Subsets	Medium	Accepted
79	Word Search	Medium	Accepted
80	Remove Duplicates from Sorted Array II	Medium	Accepted
81	Search in Rotated Sorted Array II	Medium	Accepted
82	Remove Duplicates from Sorted List II	Medium	Accepted
83	Remove Duplicates from Sorted List	Easy	Accepted
84	Largest Rectangle in Histogram	Hard	Accepted
85	Maximal Rectangle	Hard	Accepted
86	Partition List	Medium	Accepted
87	Scramble String	Hard	Accepted
88	Merge Sorted Array	Easy	Accepted
89	Gray Code	Medium	Accepted
90	Subsets II	Medium	Accepted
91	Decode Ways	Medium	Accepted
92	Reverse Linked List II	Medium	Accepted
93	Restore IP Addresses	Medium	Accepted
94	Binary Tree Inorder Traversal	Medium	Accepted
95	Unique Binary Search Trees II	Medium	Accepted
96	Unique Binary Search Trees	Medium	Accepted
97	Interleaving String	Hard
98	Validate Binary Search Tree	Medium	Accepted
99	Recover Binary Search Tree	Hard	Accepted
100	Same Tree	Easy	Accepted
101	Symmetric Tree	Easy	Accepted
102	Binary Tree Level Order Traversal	Medium	Accepted
103	Binary Tree Zigzag Level Order Traversal	Medium	Accepted
104	Maximum Depth of Binary Tree	Easy	Accepted
105	Construct Binary Tree from Preorder and Inorder Traversal	Medium	Accepted
106	Construct Binary Tree from Inorder and Postorder Traversal	Medium	Accepted
107	Binary Tree Level Order Traversal II	Easy	Accepted
108	Convert Sorted Array to Binary Search Tree	Easy	Accepted
109	Convert Sorted List to Binary Search Tree	Medium	Accepted
110	Balanced Binary Tree	Easy	Accepted
111	Minimum Depth of Binary Tree	Easy	Accepted
112	Path Sum	Easy	Accepted
113	Path Sum II	Medium	Accepted
114	Flatten Binary Tree to Linked List	Medium	Accepted
115	Distinct Subsequences	Hard	Accepted
116	Populating Next Right Pointers in Each Node	Medium	Accepted
117	Populating Next Right Pointers in Each Node II	Medium	Accepted
118	Pascal's Triangle	Easy	Accepted
119	Pascal's Triangle II	Easy	Accepted
120	Triangle	Medium	Accepted
121	Best Time to Buy and Sell Stock	Easy	Accepted
122	Best Time to Buy and Sell Stock II	Easy	Accepted
123	Best Time to Buy and Sell Stock III	Hard	Accepted
124	Binary Tree Maximum Path Sum	Hard	Accepted
125	Valid Palindrome	Easy	Accepted
126	Word Ladder II	Hard
127	Word Ladder	Medium	Accepted
128	Longest Consecutive Sequence	Hard	Accepted
129	Sum Root to Leaf Numbers	Medium	Accepted
130	Surrounded Regions	Medium	Accepted
131	Palindrome Partitioning	Medium	Accepted
132	Palindrome Partitioning II	Hard
133	Clone Graph	Medium	Accepted
134	Gas Station	Medium	Accepted
135	Candy	Hard	Accepted
136	Single Number	Easy	Accepted
137	Single Number II	Medium
138	Copy List with Random Pointer	Medium	Accepted
139	Word Break	Medium	Accepted
140	Word Break II	Hard	Accepted
141	Linked List Cycle	Easy	Accepted
142	Linked List Cycle II	Medium	Accepted
143	Reorder List	Medium	Accepted
144	Binary Tree Preorder Traversal	Medium	Accepted
145	Binary Tree Postorder Traversal	Hard	Accepted
146	LRU Cache	Medium	Accepted
147	Insertion Sort List	Medium	Accepted
148	Sort List	Medium	Accepted
149	Max Points on a Line	Hard
150	Evaluate Reverse Polish Notation	Medium	Accepted
151	Reverse Words in a String	Medium	Accepted
152	Maximum Product Subarray	Medium	Accepted
153	Find Minimum in Rotated Sorted Array	Medium	Accepted
154	Find Minimum in Rotated Sorted Array II	Hard	Accepted
155	Min Stack	Easy	Accepted
156	Binary Tree Upside Down	Medium
157	Read N Characters Given Read4	Easy
158	Read N Characters Given Read4 II - Call multiple times	Hard	Accepted
159	Longest Substring with At Most Two Distinct Characters	Hard
160	Intersection of Two Linked Lists	Easy	Accepted
161	One Edit Distance	Medium	Accepted
162	Find Peak Element	Medium	Accepted
163	Missing Ranges	Medium
164	Maximum Gap	Hard
165	Compare Version Numbers	Medium	Accepted
166	Fraction to Recurring Decimal	Medium	Accepted
167	Two Sum II - Input array is sorted	Easy	Accepted
168	Excel Sheet Column Title	Easy	Accepted
169	Majority Element	Easy	Accepted
170	Two Sum III - Data structure design	Easy
171	Excel Sheet Column Number	Easy	Accepted
172	Factorial Trailing Zeroes	Easy	Accepted
173	Binary Search Tree Iterator	Medium	Accepted
174	Dungeon Game	Hard	Accepted
179	Largest Number	Medium	Accepted
186	Reverse Words in a String II	Medium
187	Repeated DNA Sequences	Medium	Accepted
188	Best Time to Buy and Sell Stock IV	Hard
189	Rotate Array	Easy	Accepted
190	Reverse Bits	Easy	Accepted
191	Number of 1 Bits	Easy	Accepted
198	House Robber	Easy	Accepted
199	Binary Tree Right Side View	Medium	Accepted
200	Number of Islands	Medium	Accepted
201	Bitwise AND of Numbers Range	Medium	Accepted
202	Happy Number	Easy	Accepted
203	Remove Linked List Elements	Easy	Accepted
204	Count Primes	Easy	Accepted
205	Isomorphic Strings	Easy	Accepted
206	Reverse Linked List	Easy	Accepted
207	Course Schedule	Medium	Accepted
208	Implement Trie (Prefix Tree)	Medium	Accepted
209	Minimum Size Subarray Sum	Medium	Accepted
210	Course Schedule II	Medium	Accepted
211	Add and Search Word - Data structure design	Medium	Accepted
212	Word Search II	Hard	Accepted
213	House Robber II	Medium	Accepted
214	Shortest Palindrome	Hard
215	Kth Largest Element in an Array	Medium	Accepted
216	Combination Sum III	Medium	Accepted
217	Contains Duplicate	Easy	Accepted
218	The Skyline Problem	Hard	Accepted
219	Contains Duplicate II	Easy	Accepted
220	Contains Duplicate III	Medium	Accepted
221	Maximal Square	Medium	Accepted
222	Count Complete Tree Nodes	Medium	Accepted
223	Rectangle Area	Medium	Accepted
224	Basic Calculator	Hard	Accepted
225	Implement Stack using Queues	Easy	Accepted
226	Invert Binary Tree	Easy	Accepted
227	Basic Calculator II	Medium	Accepted
228	Summary Ranges	Medium	Accepted
229	Majority Element II	Medium	Accepted
230	Kth Smallest Element in a BST	Medium	Accepted
231	Power of Two	Easy	Accepted
232	Implement Queue using Stacks	Easy	Accepted
233	Number of Digit One	Hard
234	Palindrome Linked List	Easy	Accepted
235	Lowest Common Ancestor of a Binary Search Tree	Easy	Accepted
236	Lowest Common Ancestor of a Binary Tree	Medium	Accepted
237	Delete Node in a Linked List	Easy	Accepted
238	Product of Array Except Self	Medium	Accepted
239	Sliding Window Maximum	Hard	Accepted
240	Search a 2D Matrix II	Medium	Accepted
241	Different Ways to Add Parentheses	Medium	Accepted
242	Valid Anagram	Easy	Accepted
243	Shortest Word Distance	Easy
244	Shortest Word Distance II	Medium
245	Shortest Word Distance III	Medium
246	Strobogrammatic Number	Easy
247	Strobogrammatic Number II	Medium
248	Strobogrammatic Number III	Hard
249	Group Shifted Strings	Medium
250	Count Univalue Subtrees	Medium
251	Flatten 2D Vector	Medium	Accepted
252	Meeting Rooms	Easy
253	Meeting Rooms II	Medium	Accepted
254	Factor Combinations	Medium
255	Verify Preorder Sequence in Binary Search Tree	Medium	Accepted
256	Paint House	Easy
257	Binary Tree Paths	Easy	Accepted
258	Add Digits	Easy	Accepted
259	3Sum Smaller	Medium
260	Single Number III	Medium
261	Graph Valid Tree	Medium
263	Ugly Number	Easy	Accepted
264	Ugly Number II	Medium	Accepted
265	Paint House II	Hard
266	Palindrome Permutation	Easy
267	Palindrome Permutation II	Medium	Accepted
268	Missing Number	Easy	Accepted
269	Alien Dictionary	Hard	Accepted
270	Closest Binary Search Tree Value	Easy
271	Encode and Decode Strings	Medium
272	Closest Binary Search Tree Value II	Hard
273	Integer to English Words	Hard	Accepted
274	H-Index	Medium	Accepted
275	H-Index II	Medium	Accepted
276	Paint Fence	Easy
277	Find the Celebrity	Medium
278	First Bad Version	Easy	Accepted
279	Perfect Squares	Medium	Accepted
280	Wiggle Sort	Medium
281	Zigzag Iterator	Medium
282	Expression Add Operators	Hard	Accepted
283	Move Zeroes	Easy	Accepted
284	Peeking Iterator	Medium	Accepted
285	Inorder Successor in BST	Medium
286	Walls and Gates	Medium
287	Find the Duplicate Number	Medium	Accepted
288	Unique Word Abbreviation	Medium
289	Game of Life	Medium	Accepted
290	Word Pattern	Easy	Accepted
291	Word Pattern II	Hard
292	Nim Game	Easy	Accepted
293	Flip Game	Easy
294	Flip Game II	Medium
295	Find Median from Data Stream	Hard	Accepted
296	Best Meeting Point	Hard
297	Serialize and Deserialize Binary Tree	Hard	Accepted
298	Binary Tree Longest Consecutive Sequence	Medium
299	Bulls and Cows	Easy	Accepted
300	Longest Increasing Subsequence	Medium	Accepted
301	Remove Invalid Parentheses	Hard	Accepted
302	Smallest Rectangle Enclosing Black Pixels	Hard
303	Range Sum Query - Immutable	Easy	Accepted
304	Range Sum Query 2D - Immutable	Medium	Accepted
305	Number of Islands II	Hard
306	Additive Number	Medium	Accepted
307	Range Sum Query - Mutable	Medium	Accepted
308	Range Sum Query 2D - Mutable	Hard
309	Best Time to Buy and Sell Stock with Cooldown	Medium	Accepted
310	Minimum Height Trees	Medium	Accepted
311	Sparse Matrix Multiplication	Medium
312	Burst Balloons	Hard	Accepted
313	Super Ugly Number	Medium	Accepted
314	Binary Tree Vertical Order Traversal	Medium
315	Count of Smaller Numbers After Self	Hard	Accepted
316	Remove Duplicate Letters	Hard	Accepted
317	Shortest Distance from All Buildings	Hard
318	Maximum Product of Word Lengths	Medium	Accepted
319	Bulb Switcher	Medium	Accepted
320	Generalized Abbreviation	Medium
321	Create Maximum Number	Hard
322	Coin Change	Medium	Accepted
323	Number of Connected Components in an Undirected Graph	Medium
324	Wiggle Sort II	Medium	Accepted
325	Maximum Size Subarray Sum Equals k	Medium
326	Power of Three	Easy	Accepted
327	Count of Range Sum	Hard
328	Odd Even Linked List	Medium	Accepted
329	Longest Increasing Path in a Matrix	Hard	Accepted
330	Patching Array	Hard	Accepted
331	Verify Preorder Serialization of a Binary Tree	Medium	Accepted
332	Reconstruct Itinerary	Medium	Accepted
333	Largest BST Subtree	Medium
334	Increasing Triplet Subsequence	Medium	Accepted
335	Self Crossing	Hard
336	Palindrome Pairs	Hard	Accepted
337	House Robber III	Medium	Accepted
338	Counting Bits	Medium	Accepted
339	Nested List Weight Sum	Easy
340	Longest Substring with At Most K Distinct Characters	Hard
341	Flatten Nested List Iterator	Medium	Accepted
342	Power of Four	Easy	Accepted
343	Integer Break	Medium
344	Reverse String	Easy	Accepted
345	Reverse Vowels of a String	Easy	Accepted
346	Moving Average from Data Stream	Easy
347	Top K Frequent Elements	Medium	Accepted
348	Design Tic-Tac-Toe	Medium
349	Intersection of Two Arrays	Easy	Accepted
350	Intersection of Two Arrays II	Easy	Accepted
351	Android Unlock Patterns	Medium
352	Data Stream as Disjoint Intervals	Hard	Accepted
353	Design Snake Game	Medium
354	Russian Doll Envelopes	Hard	Accepted
355	Design Twitter	Medium	Accepted
356	Line Reflection	Medium
357	Count Numbers with Unique Digits	Medium	Accepted
358	Rearrange String k Distance Apart	Hard
359	Logger Rate Limiter	Easy	Accepted
360	Sort Transformed Array	Medium
361	Bomb Enemy	Medium	Accepted
362	Design Hit Counter	Medium
363	Max Sum of Rectangle No Larger Than K	Hard	Accepted
364	Nested List Weight Sum II	Medium
365	Water and Jug Problem	Medium
366	Find Leaves of Binary Tree	Medium
367	Valid Perfect Square	Easy	Accepted
368	Largest Divisible Subset	Medium	Accepted
369	Plus One Linked List	Medium
370	Range Addition	Medium
371	Sum of Two Integers	Easy	Accepted
372	Super Pow	Medium
373	Find K Pairs with Smallest Sums	Medium	Accepted
374	Guess Number Higher or Lower	Easy	Accepted
375	Guess Number Higher or Lower II	Medium	Accepted
376	Wiggle Subsequence	Medium	Accepted
377	Combination Sum IV	Medium	Accepted
378	Kth Smallest Element in a Sorted Matrix	Medium	Accepted
379	Design Phone Directory	Medium
380	Insert Delete GetRandom O(1)	Medium	Accepted
381	Insert Delete GetRandom O(1) - Duplicates allowed	Hard	Accepted
382	Linked List Random Node	Medium
383	Ransom Note	Easy	Accepted
384	Shuffle an Array	Medium	Accepted
385	Mini Parser	Medium
386	Lexicographical Numbers	Medium	Accepted
387	First Unique Character in a String	Easy	Accepted
388	Longest Absolute File Path	Medium	Accepted
389	Find the Difference	Easy	Accepted
390	Elimination Game	Medium	Accepted
391	Perfect Rectangle	Hard	Accepted
392	Is Subsequence	Easy	Accepted
393	UTF-8 Validation	Medium
394	Decode String	Medium	Accepted
395	Longest Substring with At Least K Repeating Characters	Medium	Accepted
396	Rotate Function	Medium	Accepted
397	Integer Replacement	Medium	Accepted
398	Random Pick Index	Medium	Accepted
399	Evaluate Division	Medium	Accepted
400	Nth Digit	Medium	Accepted
401	Binary Watch	Easy	Accepted
402	Remove K Digits	Medium	Accepted
403	Frog Jump	Hard	Accepted
404	Sum of Left Leaves	Easy	Accepted
405	Convert a Number to Hexadecimal	Easy	Accepted
406	Queue Reconstruction by Height	Medium	Accepted
407	Trapping Rain Water II	Hard
408	Valid Word Abbreviation	Easy
409	Longest Palindrome	Easy	Accepted
410	Split Array Largest Sum	Hard
411	Minimum Unique Word Abbreviation	Hard
412	Fizz Buzz	Easy	Accepted
413	Arithmetic Slices	Medium	Accepted
414	Third Maximum Number	Easy	Accepted
415	Add Strings	Easy	Accepted
416	Partition Equal Subset Sum	Medium	Accepted
417	Pacific Atlantic Water Flow	Medium	Accepted
418	Sentence Screen Fitting	Medium
419	Battleships in a Board	Medium	Accepted
420	Strong Password Checker	Hard
421	Maximum XOR of Two Numbers in an Array	Medium
422	Valid Word Square	Easy
423	Reconstruct Original Digits from English	Medium	Accepted
424	Longest Repeating Character Replacement	Medium	Accepted
425	Word Squares	Hard
426	Convert Binary Search Tree to Sorted Doubly Linked List	Medium
427	Construct Quad Tree	Medium	Accepted
428	Serialize and Deserialize N-ary Tree	Hard
429	N-ary Tree Level Order Traversal	Medium	Accepted
430	Flatten a Multilevel Doubly Linked List	Medium	Accepted
431	Encode N-ary Tree to Binary Tree	Hard
432	All O`one Data Structure	Hard	Accepted
433	Minimum Genetic Mutation	Medium	Accepted
434	Number of Segments in a String	Easy	Accepted
435	Non-overlapping Intervals	Medium	Accepted
436	Find Right Interval	Medium	Accepted
437	Path Sum III	Easy	Accepted
438	Find All Anagrams in a String	Medium	Accepted
439	Ternary Expression Parser	Medium
440	K-th Smallest in Lexicographical Order	Hard	Accepted
441	Arranging Coins	Easy	Accepted
442	Find All Duplicates in an Array	Medium	Accepted
443	String Compression	Easy	Accepted
444	Sequence Reconstruction	Medium
445	Add Two Numbers II	Medium	Accepted
446	Arithmetic Slices II - Subsequence	Hard
447	Number of Boomerangs	Easy
448	Find All Numbers Disappeared in an Array	Easy	Accepted
449	Serialize and Deserialize BST	Medium
450	Delete Node in a BST	Medium
451	Sort Characters By Frequency	Medium
452	Minimum Number of Arrows to Burst Balloons	Medium
453	Minimum Moves to Equal Array Elements	Easy
454	4Sum II	Medium	Accepted
455	Assign Cookies	Easy
456	132 Pattern	Medium
457	Circular Array Loop	Medium	Accepted
458	Poor Pigs	Hard
459	Repeated Substring Pattern	Easy
460	LFU Cache	Hard
461	Hamming Distance	Easy	Accepted
462	Minimum Moves to Equal Array Elements II	Medium
463	Island Perimeter	Easy	Accepted
464	Can I Win	Medium
465	Optimal Account Balancing	Hard	Accepted
466	Count The Repetitions	Hard
467	Unique Substrings in Wraparound String	Medium
468	Validate IP Address	Medium
469	Convex Polygon	Medium
470	Implement Rand10() Using Rand7()	Medium
471	Encode String with Shortest Length	Hard
472	Concatenated Words	Hard
473	Matchsticks to Square	Medium
474	Ones and Zeroes	Medium
475	Heaters	Easy
476	Number Complement	Easy
477	Total Hamming Distance	Medium	Accepted
478	Generate Random Point in a Circle	Medium
479	Largest Palindrome Product	Hard
480	Sliding Window Median	Hard
481	Magical String	Medium
482	License Key Formatting	Easy	Accepted
483	Smallest Good Base	Hard
484	Find Permutation	Medium
485	Max Consecutive Ones	Easy
486	Predict the Winner	Medium
487	Max Consecutive Ones II	Medium
488	Zuma Game	Hard
489	Robot Room Cleaner	Hard
490	The Maze	Medium
491	Increasing Subsequences	Medium	Accepted
492	Construct the Rectangle	Easy
493	Reverse Pairs	Hard
494	Target Sum	Medium	Accepted
495	Teemo Attacking	Medium
496	Next Greater Element I	Easy
497	Random Point in Non-overlapping Rectangles	Medium
498	Diagonal Traverse	Medium
499	The Maze III	Hard
500	Keyboard Row	Easy
501	Find Mode in Binary Search Tree	Easy
502	IPO	Hard
503	Next Greater Element II	Medium
504	Base 7	Easy
505	The Maze II	Medium
506	Relative Ranks	Easy
507	Perfect Number	Easy
508	Most Frequent Subtree Sum	Medium
509	Fibonacci Number	Easy
510	Inorder Successor in BST II	Medium
513	Find Bottom Left Tree Value	Medium
514	Freedom Trail	Hard
515	Find Largest Value in Each Tree Row	Medium
516	Longest Palindromic Subsequence	Medium	Accepted
517	Super Washing Machines	Hard
518	Coin Change 2	Medium
519	Random Flip Matrix	Medium
520	Detect Capital	Easy
521	Longest Uncommon Subsequence I	Easy
522	Longest Uncommon Subsequence II	Medium
523	Continuous Subarray Sum	Medium	Accepted
524	Longest Word in Dictionary through Deleting	Medium	Accepted
525	Contiguous Array	Medium
526	Beautiful Arrangement	Medium
527	Word Abbreviation	Hard
528	Random Pick with Weight	Medium	Accepted
529	Minesweeper	Medium	Accepted
530	Minimum Absolute Difference in BST	Easy
531	Lonely Pixel I	Medium
532	K-diff Pairs in an Array	Easy	Accepted
533	Lonely Pixel II	Medium
535	Encode and Decode TinyURL	Medium	Accepted
536	Construct Binary Tree from String	Medium
537	Complex Number Multiplication	Medium
538	Convert BST to Greater Tree	Easy	Accepted
539	Minimum Time Difference	Medium
540	Single Element in a Sorted Array	Medium
541	Reverse String II	Easy
542	01 Matrix	Medium
543	Diameter of Binary Tree	Easy	Accepted
544	Output Contest Matches	Medium
545	Boundary of Binary Tree	Medium
546	Remove Boxes	Hard
547	Friend Circles	Medium
548	Split Array with Equal Sum	Medium
549	Binary Tree Longest Consecutive Sequence II	Medium
551	Student Attendance Record I	Easy	Accepted
552	Student Attendance Record II	Hard
553	Optimal Division	Medium
554	Brick Wall	Medium	Accepted
555	Split Concatenated Strings	Medium
556	Next Greater Element III	Medium
557	Reverse Words in a String III	Easy
558	Quad Tree Intersection	Easy
559	Maximum Depth of N-ary Tree	Easy
560	Subarray Sum Equals K	Medium	Accepted
561	Array Partition I	Easy
562	Longest Line of Consecutive One in Matrix	Medium
563	Binary Tree Tilt	Easy
564	Find the Closest Palindrome	Hard
565	Array Nesting	Medium
566	Reshape the Matrix	Easy
567	Permutation in String	Medium	Accepted
568	Maximum Vacation Days	Hard
572	Subtree of Another Tree	Easy	Accepted
573	Squirrel Simulation	Medium
575	Distribute Candies	Easy
576	Out of Boundary Paths	Medium
581	Shortest Unsorted Continuous Subarray	Easy	Accepted
582	Kill Process	Medium
583	Delete Operation for Two Strings	Medium
587	Erect the Fence	Hard
588	Design In-Memory File System	Hard
589	N-ary Tree Preorder Traversal	Easy
590	N-ary Tree Postorder Traversal	Easy
591	Tag Validator	Hard
592	Fraction Addition and Subtraction	Medium
593	Valid Square	Medium
594	Longest Harmonious Subsequence	Easy
598	Range Addition II	Easy
599	Minimum Index Sum of Two Lists	Easy
600	Non-negative Integers without Consecutive Ones	Hard
604	Design Compressed String Iterator	Easy
605	Can Place Flowers	Easy
606	Construct String from Binary Tree	Easy
609	Find Duplicate File in System	Medium
611	Valid Triangle Number	Medium
616	Add Bold Tag in String	Medium
617	Merge Two Binary Trees	Easy	Accepted
621	Task Scheduler	Medium	Accepted
622	Design Circular Queue	Medium
623	Add One Row to Tree	Medium
624	Maximum Distance in Arrays	Easy
625	Minimum Factorization	Medium
628	Maximum Product of Three Numbers	Easy
629	K Inverse Pairs Array	Hard
630	Course Schedule III	Hard
631	Design Excel Sum Formula	Hard
632	Smallest Range Covering Elements from K Lists	Hard
633	Sum of Square Numbers	Easy
634	Find the Derangement of An Array	Medium
635	Design Log Storage System	Medium
636	Exclusive Time of Functions	Medium	Accepted
637	Average of Levels in Binary Tree	Easy	Accepted
638	Shopping Offers	Medium
639	Decode Ways II	Hard
640	Solve the Equation	Medium
641	Design Circular Deque	Medium
642	Design Search Autocomplete System	Hard
643	Maximum Average Subarray I	Easy
644	Maximum Average Subarray II	Hard
645	Set Mismatch	Easy
646	Maximum Length of Pair Chain	Medium
647	Palindromic Substrings	Medium	Accepted
648	Replace Words	Medium
649	Dota2 Senate	Medium
650	2 Keys Keyboard	Medium
651	4 Keys Keyboard	Medium
652	Find Duplicate Subtrees	Medium
653	Two Sum IV - Input is a BST	Easy
654	Maximum Binary Tree	Medium	Accepted
655	Print Binary Tree	Medium	Accepted
656	Coin Path	Hard
657	Robot Return to Origin	Easy
658	Find K Closest Elements	Medium	Accepted
659	Split Array into Consecutive Subsequences	Medium
660	Remove 9	Hard
661	Image Smoother	Easy
662	Maximum Width of Binary Tree	Medium
663	Equal Tree Partition	Medium
664	Strange Printer	Hard
665	Non-decreasing Array	Easy
666	Path Sum IV	Medium
667	Beautiful Arrangement II	Medium
668	Kth Smallest Number in Multiplication Table	Hard	Accepted
669	Trim a Binary Search Tree	Easy
670	Maximum Swap	Medium	Accepted
671	Second Minimum Node In a Binary Tree	Easy
672	Bulb Switcher II	Medium
673	Number of Longest Increasing Subsequence	Medium
674	Longest Continuous Increasing Subsequence	Easy	Accepted
675	Cut Off Trees for Golf Event	Hard
676	Implement Magic Dictionary	Medium
677	Map Sum Pairs	Medium
678	Valid Parenthesis String	Medium
679	24 Game	Hard
680	Valid Palindrome II	Easy	Accepted
681	Next Closest Time	Medium
682	Baseball Game	Easy
683	K Empty Slots	Hard
684	Redundant Connection	Medium	Accepted
685	Redundant Connection II	Hard	Accepted
686	Repeated String Match	Easy
687	Longest Univalue Path	Easy
688	Knight Probability in Chessboard	Medium
689	Maximum Sum of 3 Non-Overlapping Subarrays	Hard	Accepted
690	Employee Importance	Easy
691	Stickers to Spell Word	Hard
692	Top K Frequent Words	Medium
693	Binary Number with Alternating Bits	Easy
694	Number of Distinct Islands	Medium
695	Max Area of Island	Medium
696	Count Binary Substrings	Easy
697	Degree of an Array	Easy
698	Partition to K Equal Sum Subsets	Medium
699	Falling Squares	Hard
700	Search in a Binary Search Tree	Easy
701	Insert into a Binary Search Tree	Medium
702	Search in a Sorted Array of Unknown Size	Medium
703	Kth Largest Element in a Stream	Easy
704	Binary Search	Easy	Accepted
705	Design HashSet	Easy
706	Design HashMap	Easy
707	Design Linked List	Medium	Accepted
708	Insert into a Sorted Circular Linked List	Medium
709	To Lower Case	Easy
710	Random Pick with Blacklist	Hard
711	Number of Distinct Islands II	Hard
712	Minimum ASCII Delete Sum for Two Strings	Medium
713	Subarray Product Less Than K	Medium	Accepted
714	Best Time to Buy and Sell Stock with Transaction Fee	Medium	Accepted
715	Range Module	Hard
716	Max Stack	Easy
717	1-bit and 2-bit Characters	Easy
718	Maximum Length of Repeated Subarray	Medium
719	Find K-th Smallest Pair Distance	Hard
720	Longest Word in Dictionary	Easy
721	Accounts Merge	Medium	Accepted
722	Remove Comments	Medium
723	Candy Crush	Medium
724	Find Pivot Index	Easy
725	Split Linked List in Parts	Medium	Accepted
726	Number of Atoms	Hard
727	Minimum Window Subsequence	Hard
728	Self Dividing Numbers	Easy
729	My Calendar I	Medium
730	Count Different Palindromic Subsequences	Hard
731	My Calendar II	Medium
732	My Calendar III	Hard
733	Flood Fill	Easy
734	Sentence Similarity	Easy
735	Asteroid Collision	Medium
736	Parse Lisp Expression	Hard
737	Sentence Similarity II	Medium
738	Monotone Increasing Digits	Medium
739	Daily Temperatures	Medium	Accepted
740	Delete and Earn	Medium
741	Cherry Pickup	Hard
742	Closest Leaf in a Binary Tree	Medium
743	Network Delay Time	Medium	Accepted
744	Find Smallest Letter Greater Than Target	Easy
745	Prefix and Suffix Search	Hard
746	Min Cost Climbing Stairs	Easy
747	Largest Number At Least Twice of Others	Easy	Accepted
748	Shortest Completing Word	Easy
749	Contain Virus	Hard
750	Number Of Corner Rectangles	Medium
751	IP to CIDR	Easy
752	Open the Lock	Medium
753	Cracking the Safe	Hard
754	Reach a Number	Easy
755	Pour Water	Medium	Accepted
756	Pyramid Transition Matrix	Medium
757	Set Intersection Size At Least Two	Hard
758	Bold Words in String	Easy
759	Employee Free Time	Hard
760	Find Anagram Mappings	Easy
761	Special Binary String	Hard
762	Prime Number of Set Bits in Binary Representation	Easy
763	Partition Labels	Medium	Accepted
764	Largest Plus Sign	Medium
765	Couples Holding Hands	Hard
766	Toeplitz Matrix	Easy
767	Reorganize String	Medium
768	Max Chunks To Make Sorted II	Hard
769	Max Chunks To Make Sorted	Medium
770	Basic Calculator IV	Hard
771	Jewels and Stones	Easy	Accepted
772	Basic Calculator III	Hard
773	Sliding Puzzle	Hard	Accepted
774	Minimize Max Distance to Gas Station	Hard
775	Global and Local Inversions	Medium
776	Split BST	Medium
777	Swap Adjacent in LR String	Medium
778	Swim in Rising Water	Hard
779	K-th Symbol in Grammar	Medium
780	Reaching Points	Hard	Accepted
781	Rabbits in Forest	Medium
782	Transform to Chessboard	Hard
783	Minimum Distance Between BST Nodes	Easy
784	Letter Case Permutation	Easy	Accepted
785	Is Graph Bipartite?	Medium	Accepted
786	K-th Smallest Prime Fraction	Hard
787	Cheapest Flights Within K Stops	Medium	Accepted
788	Rotated Digits	Easy
789	Escape The Ghosts	Medium
790	Domino and Tromino Tiling	Medium
791	Custom Sort String	Medium
792	Number of Matching Subsequences	Medium
793	Preimage Size of Factorial Zeroes Function	Hard
794	Valid Tic-Tac-Toe State	Medium
795	Number of Subarrays with Bounded Maximum	Medium
796	Rotate String	Easy
797	All Paths From Source to Target	Medium
798	Smallest Rotation with Highest Score	Hard
799	Champagne Tower	Medium
800	Similar RGB Color	Easy	Accepted
801	Minimum Swaps To Make Sequences Increasing	Medium	Accepted
802	Find Eventual Safe States	Medium	Accepted
803	Bricks Falling When Hit	Hard
804	Unique Morse Code Words	Easy	Accepted
805	Split Array With Same Average	Hard
806	Number of Lines To Write String	Easy	Accepted
807	Max Increase to Keep City Skyline	Medium
808	Soup Servings	Medium
809	Expressive Words	Medium	Accepted
810	Chalkboard XOR Game	Hard
811	Subdomain Visit Count	Easy
812	Largest Triangle Area	Easy
813	Largest Sum of Averages	Medium
814	Binary Tree Pruning	Medium
815	Bus Routes	Hard
816	Ambiguous Coordinates	Medium
817	Linked List Components	Medium	Accepted
818	Race Car	Hard
819	Most Common Word	Easy	Accepted
820	Short Encoding of Words	Medium
821	Shortest Distance to a Character	Easy
822	Card Flipping Game	Medium
823	Binary Trees With Factors	Medium
824	Goat Latin	Easy
825	Friends Of Appropriate Ages	Medium	Accepted
826	Most Profit Assigning Work	Medium	Accepted
827	Making A Large Island	Hard
828	Unique Letter String	Hard
829	Consecutive Numbers Sum	Hard
830	Positions of Large Groups	Easy
831	Masking Personal Information	Medium
832	Flipping an Image	Easy
833	Find And Replace in String	Medium
834	Sum of Distances in Tree	Hard
835	Image Overlap	Medium
836	Rectangle Overlap	Easy
837	New 21 Game	Medium
838	Push Dominoes	Medium	Accepted
839	Similar String Groups	Hard
840	Magic Squares In Grid	Easy
841	Keys and Rooms	Medium
842	Split Array into Fibonacci Sequence	Medium
843	Guess the Word	Hard
844	Backspace String Compare	Easy	Accepted
845	Longest Mountain in Array	Medium	Accepted
846	Hand of Straights	Medium
847	Shortest Path Visiting All Nodes	Hard
848	Shifting Letters	Medium
849	Maximize Distance to Closest Person	Easy
850	Rectangle Area II	Hard
851	Loud and Rich	Medium
852	Peak Index in a Mountain Array	Easy	Accepted
853	Car Fleet	Medium
854	K-Similar Strings	Hard
855	Exam Room	Medium
856	Score of Parentheses	Medium
857	Minimum Cost to Hire K Workers	Hard
858	Mirror Reflection	Medium
859	Buddy Strings	Easy
860	Lemonade Change	Easy
861	Score After Flipping Matrix	Medium
862	Shortest Subarray with Sum at Least K	Hard
863	All Nodes Distance K in Binary Tree	Medium	Accepted
864	Shortest Path to Get All Keys	Hard
865	Smallest Subtree with all the Deepest Nodes	Medium
866	Prime Palindrome	Medium
867	Transpose Matrix	Easy
868	Binary Gap	Easy
869	Reordered Power of 2	Medium
870	Advantage Shuffle	Medium
871	Minimum Number of Refueling Stops	Hard
872	Leaf-Similar Trees	Easy
873	Length of Longest Fibonacci Subsequence	Medium
874	Walking Robot Simulation	Easy
875	Koko Eating Bananas	Medium
876	Middle of the Linked List	Easy	Accepted
877	Stone Game	Medium
878	Nth Magical Number	Hard
879	Profitable Schemes	Hard
880	Decoded String at Index	Medium
881	Boats to Save People	Medium	Accepted
882	Reachable Nodes In Subdivided Graph	Hard
883	Projection Area of 3D Shapes	Easy
884	Uncommon Words from Two Sentences	Easy
885	Spiral Matrix III	Medium
886	Possible Bipartition	Medium
887	Super Egg Drop	Hard
888	Fair Candy Swap	Easy
889	Construct Binary Tree from Preorder and Postorder Traversal	Medium
890	Find and Replace Pattern	Medium
891	Sum of Subsequence Widths	Hard
892	Surface Area of 3D Shapes	Easy
893	Groups of Special-Equivalent Strings	Easy
894	All Possible Full Binary Trees	Medium
895	Maximum Frequency Stack	Hard
896	Monotonic Array	Easy	Accepted
897	Increasing Order Search Tree	Easy
898	Bitwise ORs of Subarrays	Medium
899	Orderly Queue	Hard
900	RLE Iterator	Medium
901	Online Stock Span	Medium
902	Numbers At Most N Given Digit Set	Hard
903	Valid Permutations for DI Sequence	Hard
904	Fruit Into Baskets	Medium	Accepted
905	Sort Array By Parity	Easy
906	Super Palindromes	Hard
907	Sum of Subarray Minimums	Medium
908	Smallest Range I	Easy
909	Snakes and Ladders	Medium
910	Smallest Range II	Medium
911	Online Election	Medium
912	Sort an Array	Medium
913	Cat and Mouse	Hard
914	X of a Kind in a Deck of Cards	Easy
915	Partition Array into Disjoint Intervals	Medium
916	Word Subsets	Medium	Accepted
917	Reverse Only Letters	Easy
918	Maximum Sum Circular Subarray	Medium
919	Complete Binary Tree Inserter	Medium
920	Number of Music Playlists	Hard
921	Minimum Add to Make Parentheses Valid	Medium
922	Sort Array By Parity II	Easy
923	3Sum With Multiplicity	Medium	Accepted
924	Minimize Malware Spread	Hard
925	Long Pressed Name	Easy	Accepted
926	Flip String to Monotone Increasing	Medium
927	Three Equal Parts	Hard
928	Minimize Malware Spread II	Hard
929	Unique Email Addresses	Easy
930	Binary Subarrays With Sum	Medium	Accepted
931	Minimum Falling Path Sum	Medium
932	Beautiful Array	Medium
933	Number of Recent Calls	Easy
934	Shortest Bridge	Medium
935	Knight Dialer	Medium
936	Stamping The Sequence	Hard
937	Reorder Data in Log Files	Easy
938	Range Sum of BST	Easy
939	Minimum Area Rectangle	Medium
940	Distinct Subsequences II	Hard
941	Valid Mountain Array	Easy
942	DI String Match	Easy
943	Find the Shortest Superstring	Hard
944	Delete Columns to Make Sorted	Easy
945	Minimum Increment to Make Array Unique	Medium
946	Validate Stack Sequences	Medium
947	Most Stones Removed with Same Row or Column	Medium
948	Bag of Tokens	Medium
949	Largest Time for Given Digits	Easy
950	Reveal Cards In Increasing Order	Medium
951	Flip Equivalent Binary Trees	Medium
952	Largest Component Size by Common Factor	Hard
953	Verifying an Alien Dictionary	Easy	Accepted
954	Array of Doubled Pairs	Medium
955	Delete Columns to Make Sorted II	Medium
956	Tallest Billboard	Hard
957	Prison Cells After N Days	Medium
958	Check Completeness of a Binary Tree	Medium
959	Regions Cut By Slashes	Medium
960	Delete Columns to Make Sorted III	Hard
961	N-Repeated Element in Size 2N Array	Easy
962	Maximum Width Ramp	Medium
963	Minimum Area Rectangle II	Medium
964	Least Operators to Express Number	Hard
965	Univalued Binary Tree	Easy
966	Vowel Spellchecker	Medium
967	Numbers With Same Consecutive Differences	Medium
968	Binary Tree Cameras	Hard
969	Pancake Sorting	Medium
970	Powerful Integers	Easy	Accepted
971	Flip Binary Tree To Match Preorder Traversal	Medium
972	Equal Rational Numbers	Hard
973	K Closest Points to Origin	Medium	Accepted
974	Subarray Sums Divisible by K	Medium
975	Odd Even Jump	Hard
976	Largest Perimeter Triangle	Easy
977	Squares of a Sorted Array	Easy	Accepted
978	Longest Turbulent Subarray	Medium
979	Distribute Coins in Binary Tree	Medium
980	Unique Paths III	Hard	Accepted
981	Time Based Key-Value Store	Medium	Accepted
982	Triples with Bitwise AND Equal To Zero	Hard
983	Minimum Cost For Tickets	Medium
984	String Without AAA or BBB	Medium
985	Sum of Even Numbers After Queries	Easy	Accepted
986	Interval List Intersections	Medium	Accepted
987	Vertical Order Traversal of a Binary Tree	Medium
988	Smallest String Starting From Leaf	Medium	Accepted
989	Add to Array-Form of Integer	Easy
990	Satisfiability of Equality Equations	Medium
991	Broken Calculator	Medium
992	Subarrays with K Different Integers	Hard
993	Cousins in Binary Tree	Easy
994	Rotting Oranges	Easy
995	Minimum Number of K Consecutive Bit Flips	Hard
996	Number of Squareful Arrays	Hard
997	Find the Town Judge	Easy	Accepted
998	Maximum Binary Tree II	Medium	Accepted
999	Available Captures for Rook	Easy	Accepted
1000	Minimum Cost to Merge Stones	Hard
1001	Grid Illumination	Hard	Accepted
1002	Find Common Characters	Easy	Accepted
1003	Check If Word Is Valid After Substitutions	Medium	Accepted
1004	Max Consecutive Ones III	Medium	Accepted
1005	Maximize Sum Of Array After K Negations	Easy	Accepted
1006	Clumsy Factorial	Medium	Accepted
1007	Minimum Domino Rotations For Equal Row	Medium	Accepted
1008	Construct Binary Search Tree from Preorder Traversal	Medium	Accepted
1009	Complement of Base 10 Integer	Easy
1010	Pairs of Songs With Total Durations Divisible by 60	Easy
1011	Capacity To Ship Packages Within D Days	Medium
1012	Numbers With Repeated Digits	Hard
1013	Partition Array Into Three Parts With Equal Sum	Easy
1014	Best Sightseeing Pair	Medium
1015	Smallest Integer Divisible by K	Medium
1016	Binary String With Substrings Representing 1 To N	Medium
1017	Convert to Base -2	Medium	Accepted
1018	Binary Prefix Divisible By 5	Easy	Accepted
1019	Next Greater Node In Linked List	Medium	Accepted
1020	Number of Enclaves	Medium	Accepted
1021	Remove Outermost Parentheses	Easy
1022	Sum of Root To Leaf Binary Numbers	Easy
1023	Camelcase Matching	Medium
1024	Video Stitching	Medium
1025	Divisor Game	Easy	Accepted
1026	Maximum Difference Between Node and Ancestor	Medium	Accepted
1027	Longest Arithmetic Sequence	Medium	Accepted
1028	Recover a Tree From Preorder Traversal	Hard	Accepted
1029	Two City Scheduling	Easy
1030	Matrix Cells in Distance Order	Easy
1031	Maximum Sum of Two Non-Overlapping Subarrays	Medium
1032	Stream of Characters	Hard
1033	Moving Stones Until Consecutive	Easy
1034	Coloring A Border	Medium
1035	Uncrossed Lines	Medium
1036	Escape a Large Maze	Hard
1037	Valid Boomerang	Easy
1038	Binary Search Tree to Greater Sum Tree	Medium
1039	Minimum Score Triangulation of Polygon	Medium
1040	Moving Stones Until Consecutive II	Medium
1041	Robot Bounded In Circle	Medium	Accepted
1042	Flower Planting With No Adjacent	Easy	Accepted
1043	Partition Array for Maximum Sum	Medium	Accepted
1044	Longest Duplicate Substring	Hard
1046	Last Stone Weight	Easy	Accepted
1047	Remove All Adjacent Duplicates In String	Easy	Accepted
1048	Longest String Chain	Medium	Accepted
1049	Last Stone Weight II	Medium
1051	Height Checker	Easy
1052	Grumpy Bookstore Owner	Medium
1053	Previous Permutation With One Swap	Medium
1054	Distant Barcodes	Medium
1055	Shortest Way to Form String	Medium	Accepted
1056	Confusing Number	Easy
1057	Campus Bikes	Medium	Accepted
1058	Minimize Rounding Error to Meet Target	Medium
1059	All Paths from Source Lead to Destination	Medium
1060	Missing Element in Sorted Array	Medium
1061	Lexicographically Smallest Equivalent String	Medium
1062	Longest Repeating Substring	Medium
1063	Number of Valid Subarrays	Hard
1064	Fixed Point	Easy
1065	Index Pairs of a String	Easy
1066	Campus Bikes II	Medium
1067	Digit Count in Range	Hard
1071	Greatest Common Divisor of Strings	Easy
1072	Flip Columns For Maximum Number of Equal Rows	Medium
1073	Adding Two Negabinary Numbers	Medium
1074	Number of Submatrices That Sum to Target	Hard
1078	Occurrences After Bigram	Easy	Accepted
1079	Letter Tile Possibilities	Medium	Accepted
1080	Insufficient Nodes in Root to Leaf Paths	Medium	Accepted
1081	Smallest Subsequence of Distinct Characters	Medium	Accepted
1085	Sum of Digits in the Minimum Number	Easy
1086	High Five	Easy
1087	Brace Expansion	Medium
1088	Confusing Number II	Hard
1089	Duplicate Zeros	Easy
1090	Largest Values From Labels	Medium
1091	Shortest Path in Binary Matrix	Medium
1092	Shortest Common Supersequence	Hard
1093	Statistics from a Large Sample	Medium	Accepted
1094	Car Pooling	Medium	Accepted
1095	Find in Mountain Array	Hard	Accepted
1096	Brace Expansion II	Hard
1099	Two Sum Less Than K	Easy
1100	Find K-Length Substrings With No Repeated Characters	Medium
1101	The Earliest Moment When Everyone Become Friends	Medium
1102	Path With Maximum Minimum Value	Medium
1103	Distribute Candies to People	Easy
1104	Path In Zigzag Labelled Binary Tree	Medium
1105	Filling Bookcase Shelves	Medium
1106	Parsing A Boolean Expression	Hard
1108	Defanging an IP Address	Easy	Accepted
1109	Corporate Flight Bookings	Medium	Accepted
1110	Delete Nodes And Return Forest	Medium	Accepted
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	Medium	Accepted
1118	Number of Days in a Month	Easy
1119	Remove Vowels from a String	Easy
1120	Maximum Average Subtree	Medium
1121	Divide Array Into Increasing Sequences	Hard
1122	Relative Sort Array	Easy
1123	Lowest Common Ancestor of Deepest Leaves	Medium
1124	Longest Well-Performing Interval	Medium
1125	Smallest Sufficient Team	Hard
1128	Number of Equivalent Domino Pairs	Easy	Accepted
1129	Shortest Path with Alternating Colors	Medium	Accepted
1130	Minimum Cost Tree From Leaf Values	Medium	Accepted
1131	Maximum of Absolute Value Expression	Medium	Accepted
1133	Largest Unique Number	Easy
1134	Armstrong Number	Easy
1135	Connecting Cities With Minimum Cost	Medium
1136	Parallel Courses	Hard
1137	N-th Tribonacci Number	Easy	Accepted
1138	Alphabet Board Path	Medium	Accepted
1139	Largest 1-Bordered Square	Medium	Accepted
1140	Stone Game II	Medium
1143	Longest Common Subsequence	Medium
1144	Decrease Elements To Make Array Zigzag	Medium
1145	Binary Tree Coloring Game	Medium
1146	Snapshot Array	Medium
1147	Longest Chunked Palindrome Decomposition	Hard
1150	Check If a Number Is Majority Element in a Sorted Array	Easy
1151	Minimum Swaps to Group All 1's Together	Medium
1152	Analyze User Website Visit Pattern	Medium
1153	String Transforms Into Another String	Hard
1154	Day of the Year	Easy
1155	Number of Dice Rolls With Target Sum	Medium
1156	Swap For Longest Repeated Character Substring	Medium
1157	Online Majority Element In Subarray	Hard
1160	Find Words That Can Be Formed by Characters	Easy
1161	Maximum Level Sum of a Binary Tree	Medium
1162	As Far from Land as Possible	Medium
1163	Last Substring in Lexicographical Order	Hard
1165	Single-Row Keyboard	Easy
1166	Design File System	Medium
1167	Minimum Cost to Connect Sticks	Medium
1168	Optimize Water Distribution in a Village	Hard
1169	Invalid Transactions	Medium
1170	Compare Strings by Frequency of the Smallest Character	Easy	Accepted
1171	Remove Zero Sum Consecutive Nodes from Linked List	Medium
1172	Dinner Plate Stacks	Hard
1175	Prime Arrangements	Easy
1176	Diet Plan Performance	Easy
1177	Can Make Palindrome from Substring	Medium
1178	Number of Valid Words for Each Puzzle	Hard
1180	Count Substrings with Only One Distinct Letter	Easy
1181	Before and After Puzzle	Medium
1182	Shortest Distance to Target Color	Medium
1183	Maximum Number of Ones	Hard
1184	Distance Between Bus Stops	Easy
1185	Day of the Week	Easy
1186	Maximum Subarray Sum with One Deletion	Medium
1187	Make Array Strictly Increasing	Hard
1189	Maximum Number of Balloons	Easy
1190	Reverse Substrings Between Each Pair of Parentheses	Medium
1191	K-Concatenation Maximum Sum	Medium
1192	Critical Connections in a Network	Hard
1196	How Many Apples Can You Put into the Basket	Easy
1197	Minimum Knight Moves	Medium
1198	Find Smallest Common Element in All Rows	Medium
1199	Minimum Time to Build Blocks	Hard
1200	Minimum Absolute Difference	Easy	Accepted
1201	Ugly Number III	Medium
1202	Smallest String With Swaps	Medium
1203	Sort Items by Groups Respecting Dependencies	Hard
1206	Design Skiplist	Hard
1207	Unique Number of Occurrences	Easy
1208	Get Equal Substrings Within Budget	Medium
1209	Remove All Adjacent Duplicates in String II	Medium
1210	Minimum Moves to Reach Target with Rotations	Hard
1213	Intersection of Three Sorted Arrays	Easy
1214	Two Sum BSTs	Medium
1215	Stepping Numbers	Medium
1216	Valid Palindrome III	Hard
1217	Play with Chips	Easy
1218	Longest Arithmetic Subsequence of Given Difference	Medium
1219	Path with Maximum Gold	Medium
1220	Count Vowels Permutation	Hard
1221	Split a String in Balanced Strings	Easy
1222	Queens That Can Attack the King	Medium
1223	Dice Roll Simulation	Medium
1224	Maximum Equal Frequency	Hard
1227	Airplane Seat Assignment Probability	Medium
1228	Missing Number In Arithmetic Progression	Easy
1229	Meeting Scheduler	Medium
1230	Toss Strange Coins	Medium
1231	Divide Chocolate	Hard
1232	Check If It Is a Straight Line	Easy
1233	Remove Sub-Folders from the Filesystem	Medium
1234	Replace the Substring for Balanced String	Medium
1235	Maximum Profit in Job Scheduling	Hard
1236	Web Crawler	Medium
1237	Find Positive Integer Solution for a Given Equation	Easy
1238	Circular Permutation in Binary Representation	Medium
1239	Maximum Length of a Concatenated String with Unique Characters	Medium
1240	Tiling a Rectangle with the Fewest Squares	Hard
1243	Array Transformation	Easy
1244	Design A Leaderboard	Medium
1245	Tree Diameter	Medium
1246	Palindrome Removal	Hard
1247	Minimum Swaps to Make Strings Equal	Medium
1248	Count Number of Nice Subarrays	Medium
1249	Minimum Remove to Make Valid Parentheses	Medium
1250	Check If It Is a Good Array	Hard
1252	Cells with Odd Values in a Matrix	Easy
1253	Reconstruct a 2-Row Binary Matrix	Medium
1254	Number of Closed Islands	Medium
1255	Maximum Score Words Formed by Letters	Hard
1256	Encode Number	Medium
1257	Smallest Common Region	Medium
1258	Synonymous Sentences	Medium
1259	Handshakes That Don't Cross	Hard
1260	Shift 2D Grid	Easy	Accepted
1261	Find Elements in a Contaminated Binary Tree	Medium	Accepted
1262	Greatest Sum Divisible by Three	Medium	Accepted
1263	Minimum Moves to Move a Box to Their Target Location	Hard
1265	Print Immutable Linked List in Reverse	Medium
1266	Minimum Time Visiting All Points	Easy	Accepted
1267	Count Servers that Communicate	Medium	Accepted
1268	Search Suggestions System	Medium	Accepted
1269	Number of Ways to Stay in the Same Place After Some Steps	Hard	Accepted