LeetcodeSol

Give Solutions by top hits.

The data was updated on 01/03/2019 and the spider code is here.

#	Top 100 Liked Questions	Solution	Difficulty	Likes
1	Two Sum	C++	Easy	10278
3	Longest Substring Without Repeating Characters	C++	Medium	5148
2	Add Two Numbers	C++	Medium	4821
4	Median of Two Sorted Arrays	C++	Hard	3962
53	Maximum Subarray	C++	Easy	3893
15	3Sum	C++	Medium	3464
5	Longest Palindromic Substring	C++	Medium	3284
42	Trapping Rain Water	C++	Hard	3226
11	Container With Most Water	C++	Medium	2941
20	Valid Parentheses	C++	Easy	2710
146	LRU Cache	C++	Hard	2621
22	Generate Parentheses	C++	Medium	2514
10	Regular Expression Matching	C++	Hard	2390
121	Best Time to Buy and Sell Stock	C++	Easy	2358
200	Number of Islands	C++	Medium	2339
198	House Robber	C++	Easy	2305
300	Longest Increasing Subsequence	C++	Medium	2278
23	Merge k Sorted Lists	C++	Hard	2243
287	Find the Duplicate Number	C++	Medium	2236
136	Single Number	C++	Easy	2226
33	Search in Rotated Sorted Array	C++	Medium	2147
206	Reverse Linked List	C++	Easy	2119
76	Minimum Window Substring	C++	Hard	2068
21	Merge Two Sorted Lists	C++	Easy	2061
238	Product of Array Except Self	C++	Medium	2041
101	Symmetric Tree	C++	Easy	2040
7	Reverse Integer	C++	Easy	2025
139	Word Break	C++	Medium	1988
17	Letter Combinations of a Phone Number	C++	Medium	1982
70	Climbing Stairs	C++	Easy	1967
160	Intersection of Two Linked Lists	C++	Easy	1944
152	Maximum Product Subarray	C++	Medium	1889
72	Edit Distance	C++	Hard	1882
283	Move Zeroes	C++	Easy	1868
56	Merge Intervals	C++	Medium	1842
215	Kth Largest Element in an Array	C++	Medium	1830
39	Combination Sum	C++	Medium	1785
46	Permutations	C++	Medium	1784
560	Subarray Sum Equals K	C++	Medium	1759
98	Validate Binary Search Tree	C++	Medium	1741
84	Largest Rectangle in Histogram	C++	Hard	1740
236	Lowest Common Ancestor of a Binary Tree	C++	Medium	1731
78	Subsets	C++	Medium	1727
55	Jump Game	C++	Medium	1716
617	Merge Two Binary Trees	C++	Easy	1714
128	Longest Consecutive Sequence	C++	Hard	1690
437	Path Sum III	C++	Easy	1664
32	Longest Valid Parentheses	C++	Hard	1660
19	Remove Nth Node From End of List	C++	Medium	1621
155	Min Stack	C++	Easy	1604
31	Next Permutation	C++	Medium	1592
79	Word Search	C++	Medium	1578
207	Course Schedule	C++	Medium	1567
96	Unique Binary Search Trees	C++	Medium	1562
105	Construct Binary Tree from Preorder and Inorder Traversal	C++	Medium	1558
226	Invert Binary Tree	C++	Easy	1557
322	Coin Change	C++	Medium	1534
239	Sliding Window Maximum	C++	Hard	1509
448	Find All Numbers Disappeared in an Array	C++	Easy	1506
621	Task Scheduler	C++	Medium	1499
234	Palindrome Linked List	C++	Easy	1497
169	Majority Element	C++	Easy	1488
41	First Missing Positive	C++	Hard	1482
75	Sort Colors	C++	Medium	1472
49	Group Anagrams	C++	Medium	1471
94	Binary Tree Inorder Traversal	C++	Medium	1461
438	Find All Anagrams in a String	C++	Easy	1445
406	Queue Reconstruction by Height	C++	Medium	1441
26	Remove Duplicates from Sorted Array	C++	Easy	1421
138	Copy List with Random Pointer	C++	Medium	1415
141	Linked List Cycle	C++	Easy	1413
34	Find First and Last Position of Element in Sorted Array	C++	Medium	1408
62	Unique Paths	C++	Medium	1405
124	Binary Tree Maximum Path Sum	C++	Hard	1396
48	Rotate Image	C++	Medium	1395
240	Search a 2D Matrix II	C++	Medium	1374
347	Top K Frequent Elements	C++	Medium	1372
337	House Robber III	C++	Medium	1362
297	Serialize and Deserialize Binary Tree	C++	Hard	1344
114	Flatten Binary Tree to Linked List	C++	Medium	1340
581	Shortest Unsorted Continuous Subarray	C++	Easy	1336
102	Binary Tree Level Order Traversal	C++	Medium	1333
771	Jewels and Stones	C++	Easy	1328
279	Perfect Squares	C++	Medium	1315
9	Palindrome Number	C++	Easy	1315
394	Decode String	C++	Medium	1305
148	Sort List	C++	Medium	1290
127	Word Ladder	C++	Medium	1283
142	Linked List Cycle II	C++	Medium	1282
85	Maximal Rectangle	C++	Hard	1276
543	Diameter of Binary Tree	C++	Easy	1271
91	Decode Ways	C++	Medium	1260
647	Palindromic Substrings	C++	Medium	1249
494	Target Sum	C++	Medium	1249
14	Longest Common Prefix	C++	Easy	1249
338	Counting Bits	C++	Medium	1241
173	Binary Search Tree Iterator	C++	Medium	1236
461	Hamming Distance	C++	Easy	1235
64	Minimum Path Sum	C++	Medium	1228
301	Remove Invalid Parentheses	C++	Hard	1222
253	Meeting Rooms II	C++	Medium	1208
104	Maximum Depth of Binary Tree	C++	Easy	1208
312	Burst Balloons	C++	Hard	1203
35	Search Insert Position	C++	Easy	1199
309	Best Time to Buy and Sell Stock with Cooldown	C++	Medium	1193
189	Rotate Array	C++	Easy	1185
538	Convert BST to Greater Tree	C++	Easy	1181
13	Roman to Integer	C++	Easy	1155
399	Evaluate Division	C++	Medium	1147
221	Maximal Square	C++	Medium	1137
110	Balanced Binary Tree	C++	Easy	1126
572	Subtree of Another Tree	C++	Easy	1109
95	Unique Binary Search Trees II	C++	Medium	1103
416	Partition Equal Subset Sum	C++	Medium	1102
739	Daily Temperatures	C++	Medium	1092
218	The Skyline Problem	C++	Hard	1075
92	Reverse Linked List II	C++	Medium	1067
100	Same Tree	C++	Easy	1051
669	Trim a Binary Search Tree	C++	Easy	1049
378	Kth Smallest Element in a Sorted Matrix	C++	Medium	1049
25	Reverse Nodes in k-Group	C++	Hard	1040
108	Convert Sorted Array to Binary Search Tree	C++	Easy	1035
45	Jump Game II	C++	Hard	1032
230	Kth Smallest Element in a BST	C++	Medium	1028
695	Max Area of Island	C++	Medium	1018
315	Count of Smaller Numbers After Self	C++	Hard	1013
120	Triangle	C++	Medium	1013
24	Swap Nodes in Pairs	C++	Medium	1008
209	Minimum Size Subarray Sum	C++	Medium	1007
295	Find Median from Data Stream	C++	Hard	1005
88	Merge Sorted Array	C++	Easy	1003
654	Maximum Binary Tree	C++	Medium	996
442	Find All Duplicates in an Array	C++	Medium	988
463	Island Perimeter	C++	Easy	985
212	Word Search II	C++	Hard	983
16	3Sum Closest	C++	Medium	976
746	Min Cost Climbing Stairs	C++	Easy	974
54	Spiral Matrix	C++	Medium	969
6	ZigZag Conversion	C++	Medium	967
665	Non-decreasing Array	C++	Easy	964
18	4Sum	C++	Medium	960
547	Friend Circles	C++	Medium	943
123	Best Time to Buy and Sell Stock III	C++	Hard	943
204	Count Primes	C++	Easy	941
44	Wildcard Matching	C++	Hard	939
199	Binary Tree Right Side View	C++	Medium	936
73	Set Matrix Zeroes	C++	Medium	934
235	Lowest Common Ancestor of a Binary Search Tree	C++	Easy	933
116	Populating Next Right Pointers in Each Node	C++	Medium	923
179	Largest Number	C++	Medium	919
486	Predict the Winner	C++	Medium	909
43	Multiply Strings	C++	Medium	905
687	Longest Univalue Path	C++	Easy	897
122	Best Time to Buy and Sell Stock II	C++	Easy	892
47	Permutations II	C++	Medium	891
387	First Unique Character in a String	C++	Easy	890
109	Convert Sorted List to Binary Search Tree	C++	Medium	887
153	Find Minimum in Rotated Sorted Array	C++	Medium	877
103	Binary Tree Zigzag Level Order Traversal	C++	Medium	875
341	Flatten Nested List Iterator	C++	Medium	872
67	Add Binary	C++	Easy	872
310	Minimum Height Trees	C++	Medium	871
329	Longest Increasing Path in a Matrix	C++	Hard	867
126	Word Ladder II	C++	Hard	860
222	Count Complete Tree Nodes	C++	Medium	856
112	Path Sum	C++	Easy	853
140	Word Break II	C++	Hard	846
714	Best Time to Buy and Sell Stock with Transaction Fee	C++	Medium	833
210	Course Schedule II	C++	Medium	827
131	Palindrome Partitioning	C++	Medium	823
516	Longest Palindromic Subsequence	C++	Medium	816
450	Delete Node in a BST	C++	Medium	815
264	Ugly Number II	C++	Medium	815
268	Missing Number	C++	Easy	814
145	Binary Tree Postorder Traversal	C++	Hard	814
51	N-Queens	C++	Hard	814
763	Partition Labels	C++	Medium	813
66	Plus One	C++	Easy	807
90	Subsets II	C++	Medium	802
402	Remove K Digits	C++	Medium	801
113	Path Sum II	C++	Medium	801
241	Different Ways to Add Parentheses	C++	Medium	799
257	Binary Tree Paths	C++	Easy	796
202	Happy Number	C++	Easy	793
117	Populating Next Right Pointers in Each Node II	C++	Medium	790
289	Game of Life	C++	Medium	788
143	Reorder List	C++	Medium	787
63	Unique Paths II	C++	Medium	787
213	House Robber II	C++	Medium	784
106	Construct Binary Tree from Inorder and Postorder Traversal	C++	Medium	781
260	Single Number III	C++	Medium	779
36	Valid Sudoku	C++	Medium	774
637	Average of Levels in Binary Tree	C++	Easy	773
269	Alien Dictionary	C++	Hard	773
37	Sudoku Solver	C++	Hard	771
229	Majority Element II	C++	Medium	765
27	Remove Element	C++	Easy	762
203	Remove Linked List Elements	C++	Easy	751
60	Permutation Sequence	C++	Medium	751
40	Combination Sum II	C++	Medium	748
74	Search a 2D Matrix	C++	Medium	746
162	Find Peak Element	C++	Medium	744
82	Remove Duplicates from Sorted List II	C++	Medium	742
334	Increasing Triplet Subsequence	C++	Medium	740
137	Single Number II	C++	Medium	740
698	Partition to K Equal Sum Subsets	C++	Medium	739
673	Number of Longest Increasing Subsequence	C++	Medium	737
377	Combination Sum IV	C++	Medium	733
57	Insert Interval	C++	Hard	733
496	Next Greater Element I	C++	Easy	731
459	Repeated Substring Pattern	C++	Easy	730
99	Recover Binary Search Tree	C++	Hard	709
77	Combinations	C++	Medium	707
652	Find Duplicate Subtrees	C++	Medium	706
133	Clone Graph	C++	Medium	706
83	Remove Duplicates from Sorted List	C++	Easy	703
371	Sum of Two Integers	C++	Easy	700
336	Palindrome Pairs	C++	Hard	698
38	Count and Say	C++	Easy	698
344	Reverse String	C++	Easy	696
144	Binary Tree Preorder Traversal	C++	Medium	696
97	Interleaving String	C++	Hard	694
787	Cheapest Flights Within K Stops	C++	Medium	692
130	Surrounded Regions	C++	Medium	684
205	Isomorphic Strings	C++	Easy	683
518	Coin Change 2	C++	Medium	677
540	Single Element in a Sorted Array	C++	Medium	675
107	Binary Tree Level Order Traversal II	C++	Easy	675
134	Gas Station	C++	Medium	672
692	Top K Frequent Words	C++	Medium	671
445	Add Two Numbers II	C++	Medium	671
328	Odd Even Linked List	C++	Medium	670
657	Robot Return to Origin	C++	Easy	669
111	Minimum Depth of Binary Tree	C++	Easy	666
188	Best Time to Buy and Sell Stock IV	C++	Hard	663
168	Excel Sheet Column Title	C++	Easy	660
237	Delete Node in a Linked List	C++	Easy	659
451	Sort Characters By Frequency	C++	Medium	658
680	Valid Palindrome II	C++	Easy	657
395	Longest Substring with At Least K Repeating Characters	C++	Medium	654
285	Inorder Successor in BST	C++	Medium	651
583	Delete Operation for Two Strings	C++	Medium	648
242	Valid Anagram	C++	Easy	648
316	Remove Duplicate Letters	C++	Hard	646
350	Intersection of Two Arrays II	C++	Easy	643
523	Continuous Subarray Sum	C++	Medium	640
525	Contiguous Array	C++	Medium	639
224	Basic Calculator	C++	Hard	639
863	All Nodes Distance K in Binary Tree	C++	Medium	637
174	Dungeon Game	C++	Hard	637
332	Reconstruct Itinerary	C++	Medium	636
650	2 Keys Keyboard	C++	Medium	629
410	Split Array Largest Sum	C++	Hard	626
421	Maximum XOR of Two Numbers in an Array	C++	Medium	625
373	Find K Pairs with Smallest Sums	C++	Medium	625
115	Distinct Subsequences	C++	Hard	625
632	Smallest Range	C++	Hard	624
628	Maximum Product of Three Numbers	C++	Easy	623
454	4Sum II	C++	Medium	623
282	Expression Add Operators	C++	Hard	619
503	Next Greater Element II	C++	Medium	618
658	Find K Closest Elements	C++	Medium	617
678	Valid Parenthesis String	C++	Medium	609
417	Pacific Atlantic Water Flow	C++	Medium	609
404	Sum of Left Leaves	C++	Easy	608
407	Trapping Rain Water II	C++	Hard	607
93	Restore IP Addresses	C++	Medium	605
129	Sum Root to Leaf Numbers	C++	Medium	604
29	Divide Two Integers	C++	Medium	604
227	Basic Calculator II	C++	Medium	603
460	LFU Cache	C++	Hard	602
220	Contains Duplicate III	C++	Medium	602
86	Partition List	C++	Medium	598
456	132 Pattern	C++	Medium	596
542	01 Matrix	C++	Medium	592
80	Remove Duplicates from Sorted Array II	C++	Medium	592
214	Shortest Palindrome	C++	Hard	590
557	Reverse Words in a String III	C++	Easy	588
81	Search in Rotated Sorted Array II	C++	Medium	587
718	Maximum Length of Repeated Subarray	C++	Medium	583
286	Walls and Gates	C++	Medium	583
696	Count Binary Substrings	C++	Easy	581
662	Maximum Width of Binary Tree	C++	Medium	581
567	Permutation in String	C++	Medium	577
290	Word Pattern	C++	Easy	576
277	Find the Celebrity	C++	Medium	576
261	Graph Valid Tree	C++	Medium	575
713	Subarray Product Less Than K	C++	Medium	572
684	Redundant Connection	C++	Medium	571
278	First Bad Version	C++	Easy	571
844	Backspace String Compare	C++	Easy	562
766	Toeplitz Matrix	C++	Easy	560
784	Letter Case Permutation	C++	Easy	559
721	Accounts Merge	C++	Medium	557
449	Serialize and Deserialize BST	C++	Medium	557
325	Maximum Size Subarray Sum Equals k	C++	Medium	555
464	Can I Win	C++	Medium	551
724	Find Pivot Index	C++	Easy	550
324	Wiggle Sort II	C++	Medium	550
740	Delete and Earn	C++	Medium	549
413	Arithmetic Slices	C++	Medium	549
61	Rotate List	C++	Medium	545
554	Brick Wall	C++	Medium	544
125	Valid Palindrome	C++	Easy	543
689	Maximum Sum of 3 Non-Overlapping Subarrays	C++	Hard	541
216	Combination Sum III	C++	Medium	541
611	Valid Triangle Number	C++	Medium	540
561	Array Partition I	C++	Easy	538
566	Reshape the Matrix	C++	Easy	534
743	Network Delay Time	C++	Medium	532
12	Integer to Roman	C++	Medium	532
513	Find Bottom Left Tree Value	C++	Medium	531
501	Find Mode in Binary Search Tree	C++	Easy	530
314	Binary Tree Vertical Order Traversal	C++	Medium	530
646	Maximum Length of Pair Chain	C++	Medium	528
474	Ones and Zeroes	C++	Medium	523
476	Number Complement	C++	Easy	522
132	Palindrome Partitioning II	C++	Hard	521
821	Shortest Distance to a Character	C++	Easy	520
343	Integer Break	C++	Medium	520
354	Russian Doll Envelopes	C++	Hard	517
159	Longest Substring with At Most Two Distinct Characters	C++	Hard	517
670	Maximum Swap	C++	Medium	514
190	Reverse Bits	C++	Easy	514
712	Minimum ASCII Delete Sum for Two Strings	C++	Medium	510
565	Array Nesting	C++	Medium	510
392	Is Subsequence	C++	Medium	509
719	Find K-th Smallest Pair Distance	C++	Hard	506
606	Construct String from Binary Tree	C++	Easy	506
151	Reverse Words in a String	C++	Medium	504
273	Integer to English Words	C++	Hard	501
368	Largest Divisible Subset	C++	Medium	497
814	Binary Tree Pruning	C++	Medium	493
477	Total Hamming Distance	C++	Medium	493
305	Number of Islands II	C++	Hard	492
232	Implement Queue using Stacks	C++	Easy	491
171	Excel Sheet Column Number	C++	Easy	489
412	Fizz Buzz	C++	Easy	488
530	Minimum Absolute Difference in BST	C++	Easy	487
376	Wiggle Subsequence	C++	Medium	487
340	Longest Substring with At Most K Distinct Characters	C++	Hard	487
366	Find Leaves of Binary Tree	C++	Medium	486
856	Score of Parentheses	C++	Medium	482
424	Longest Repeating Character Replacement	C++	Medium	480
30	Substring with Concatenation of All Words	C++	Hard	480
813	Largest Sum of Averages	C++	Medium	479
659	Split Array into Consecutive Subsequences	C++	Medium	476
767	Reorganize String	C++	Medium	474
375	Guess Number Higher or Lower II	C++	Medium	473
409	Longest Palindrome	C++	Easy	470
150	Evaluate Reverse Polish Notation	C++	Medium	468
318	Maximum Product of Word Lengths	C++	Medium	467
807	Max Increase to Keep City Skyline	C++	Medium	466
686	Repeated String Match	C++	Easy	465
801	Minimum Swaps To Make Sequences Increasing	C++	Medium	463
493	Reverse Pairs	C++	Hard	463
857	Minimum Cost to Hire K Workers	C++	Hard	462
697	Degree of an Array	C++	Easy	460
403	Frog Jump	C++	Hard	459
331	Verify Preorder Serialization of a Binary Tree	C++	Medium	459
389	Find the Difference	C++	Easy	458
515	Find Largest Value in Each Tree Row	C++	Medium	457
475	Heaters	C++	Easy	454
832	Flipping an Image	C++	Easy	451
452	Minimum Number of Arrows to Burst Balloons	C++	Medium	446
219	Contains Duplicate II	C++	Easy	445
683	K Empty Slots	C++	Hard	444
135	Candy	C++	Hard	443
355	Design Twitter	C++	Medium	442
172	Factorial Trailing Zeroes	C++	Easy	439
876	Middle of the Linked List	C++	Easy	437
643	Maximum Average Subarray I	C++	Easy	435
164	Maximum Gap	C++	Hard	435
435	Non-overlapping Intervals	C++	Medium	433
605	Can Place Flowers	C++	Easy	432
862	Shortest Subarray with Sum at Least K	C++	Hard	430
489	Robot Room Cleaner	C++	Hard	426
792	Number of Matching Subsequences	C++	Medium	425
907	Sum of Subarray Minimums	C++	Medium	419
149	Max Points on a Line	C++	Hard	419
367	Valid Perfect Square	C++	Easy	418
685	Redundant Connection II	C++	Hard	417
674	Longest Continuous Increasing Subsequence	C++	Easy	417
841	Keys and Rooms	C++	Medium	415
535	Encode and Decode TinyURL	C++	Medium	415
769	Max Chunks To Make Sorted	C++	Medium	414
258	Add Digits	C++	Easy	411
154	Find Minimum in Rotated Sorted Array II	C++	Hard	411
636	Exclusive Time of Functions	C++	Medium	410
526	Beautiful Arrangement	C++	Medium	410
166	Fraction to Recurring Decimal	C++	Medium	410
642	Design Search Autocomplete System	C++	Hard	408
648	Replace Words	C++	Medium	406
59	Spiral Matrix II	C++	Medium	405
728	Self Dividing Numbers	C++	Easy	404
419	Battleships in a Board	C++	Medium	403
370	Range Addition	C++	Medium	402
905	Sort Array By Parity	C++	Easy	400
187	Repeated DNA Sequences	C++	Medium	400
804	Unique Morse Code Words	C++	Easy	399
231	Power of Two	C++	Easy	399
191	Number of 1 Bits	C++	Easy	399
276	Paint Fence	C++	Easy	393
834	Sum of Distances in Tree	C++	Hard	392
735	Asteroid Collision	C++	Medium	390
645	Set Mismatch	C++	Easy	390
491	Increasing Subsequences	C++	Medium	389
929	Unique Email Addresses	C++	Easy	388
388	Longest Absolute File Path	C++	Medium	386
65	Valid Number	C++	Hard	386
733	Flood Fill	C++	Easy	382
71	Simplify Path	C++	Medium	382
594	Longest Harmonious Subsequence	C++	Easy	379
317	Shortest Distance from All Buildings	C++	Hard	379
500	Keyboard Row	C++	Easy	378
280	Wiggle Sort	C++	Medium	378
815	Bus Routes	C++	Hard	377
323	Number of Connected Components in an Undirected Graph	C++	Medium	374
274	H-Index	C++	Medium	373
690	Employee Importance	C++	Easy	372
490	The Maze	C++	Medium	370
904	Fruit Into Baskets	C++	Medium	369
349	Intersection of Two Arrays	C++	Easy	369
201	Bitwise AND of Numbers Range	C++	Medium	369
630	Course Schedule III	C++	Hard	368
415	Add Strings	C++	Easy	368
796	Rotate String	C++	Easy	365
363	Max Sum of Rectangle No Larger Than K	C++	Hard	365
345	Reverse Vowels of a String	C++	Easy	365
694	Number of Distinct Islands	C++	Medium	361
508	Most Frequent Subtree Sum	C++	Medium	361
487	Max Consecutive Ones II	C++	Medium	361
270	Closest Binary Search Tree Value	C++	Easy	361
254	Factor Combinations	C++	Medium	361
549	Binary Tree Longest Consecutive Sequence II	C++	Medium	360
797	All Paths From Source to Target	C++	Medium	358
849	Maximize Distance to Closest Person	C++	Easy	357
217	Contains Duplicate	C++	Easy	355
979	Distribute Coins in Binary Tree	C++	Medium	354
671	Second Minimum Node In a Binary Tree	C++	Easy	354
480	Sliding Window Median	C++	Hard	353
414	Third Maximum Number	C++	Easy	352
741	Cherry Pickup	C++	Hard	350
321	Create Maximum Number	C++	Hard	350
638	Shopping Offers	C++	Medium	348
894	All Possible Full Binary Trees	C++	Medium	346
679	24 Game	C++	Hard	346
889	Construct Binary Tree from Preorder and Postorder Traversal	C++	Medium	344
327	Count of Range Sum	C++	Hard	344
872	Leaf-Similar Trees	C++	Easy	342
401	Binary Watch	C++	Easy	341
485	Max Consecutive Ones	C++	Easy	340
259	3Sum Smaller	C++	Medium	340
228	Summary Ranges	C++	Medium	340
161	One Edit Distance	C++	Medium	340
58	Length of Last Word	C++	Easy	340
532	K-diff Pairs in an Array	C++	Easy	339
453	Minimum Moves to Equal Array Elements	C++	Easy	339
386	Lexicographical Numbers	C++	Medium	338
382	Linked List Random Node	C++	Medium	338
292	Nim Game	C++	Easy	338
776	Split BST	C++	Medium	336
426	Convert Binary Search Tree to Sorted Doubly Linked List	C++	Medium	336
467	Unique Substrings in Wraparound String	C++	Medium	336
873	Length of Longest Fibonacci Subsequence	C++	Medium	335
256	Paint House	C++	Easy	335
89	Gray Code	C++	Medium	335
546	Remove Boxes	C++	Hard	334
895	Maximum Frequency Stack	C++	Hard	333
729	My Calendar I	C++	Medium	333
556	Next Greater Element III	C++	Medium	333
462	Minimum Moves to Equal Array Elements II	C++	Medium	333
676	Implement Magic Dictionary	C++	Medium	332
348	Design Tic-Tac-Toe	C++	Medium	332
313	Super Ugly Number	C++	Medium	331
68	Text Justification	C++	Hard	331
599	Minimum Index Sum of Two Lists	C++	Easy	330
681	Next Closest Time	C++	Medium	329
443	String Compression	C++	Easy	329
942	DI String Match	C++	Easy	327
752	Open the Lock	C++	Medium	327
582	Kill Process	C++	Medium	327
425	Word Squares	C++	Hard	327
688	Knight Probability in Chessboard	C++	Medium	326
783	Minimum Distance Between BST Nodes	C++	Easy	325
725	Split Linked List in Parts	C++	Medium	325
498	Diagonal Traverse	C++	Medium	325
791	Custom Sort String	C++	Medium	324
147	Insertion Sort List	C++	Medium	323
255	Verify Preorder Sequence in Binary Search Tree	C++	Medium	322
802	Find Eventual Safe States	C++	Medium	319
272	Closest Binary Search Tree Value II	C++	Hard	318
795	Number of Subarrays with Bounded Maximum	C++	Medium	316
947	Most Stones Removed with Same Row or Column	C++	Medium	315
265	Paint House II	C++	Hard	314
865	Smallest Subtree with all the Deepest Nodes	C++	Medium	312
731	My Calendar II	C++	Medium	312
887	Super Egg Drop	C++	Hard	311
720	Longest Word in Dictionary	C++	Easy	311
983	Minimum Cost For Tickets	C++	Medium	310
871	Minimum Number of Refueling Stops	C++	Hard	309
890	Find and Replace Pattern	C++	Medium	308
633	Sum of Square Numbers	C++	Easy	308
765	Couples Holding Hands	C++	Hard	306
418	Sentence Screen Fitting	C++	Medium	305
559	Maximum Depth of N-ary Tree	C++	Easy	304
524	Longest Word in Dictionary through Deleting	C++	Medium	304
333	Largest BST Subtree	C++	Medium	301
563	Binary Tree Tilt	C++	Easy	299
616	Add Bold Tag in String	C++	Medium	297
362	Design Hit Counter	C++	Medium	297
682	Baseball Game	C++	Easy	295
473	Matchsticks to Square	C++	Medium	295
299	Bulls and Cows	C++	Medium	295
225	Implement Stack using Queues	C++	Easy	295
520	Detect Capital	C++	Easy	294
455	Assign Cookies	C++	Easy	293
836	Rectangle Overlap	C++	Easy	292
505	The Maze II	C++	Medium	291
383	Ransom Note	C++	Easy	291
342	Power of Four	C++	Easy	291
668	Kth Smallest Number in Multiplication Table	C++	Hard	290
727	Minimum Window Subsequence	C++	Hard	289
430	Flatten a Multilevel Doubly Linked List	C++	Medium	285
737	Sentence Similarity II	C++	Medium	285
778	Swim in Rising Water	C++	Hard	284
298	Binary Tree Longest Consecutive Sequence	C++	Medium	284
918	Maximum Sum Circular Subarray	C++	Medium	282
330	Patching Array	C++	Hard	282
701	Insert into a Binary Search Tree	C++	Medium	281
845	Longest Mountain in Array	C++	Medium	280
716	Max Stack	C++	Easy	280
458	Poor Pigs	C++	Hard	280
693	Binary Number with Alternating Bits	C++	Easy	279
838	Push Dominoes	C++	Medium	277
750	Number Of Corner Rectangles	C++	Medium	277
677	Map Sum Pairs	C++	Medium	277
447	Number of Boomerangs	C++	Easy	277
773	Sliding Puzzle	C++	Hard	275
760	Find Anagram Mappings	C++	Easy	275
529	Minesweeper	C++	Medium	275
346	Moving Average from Data Stream	C++	Easy	275
364	Nested List Weight Sum II	C++	Medium	274
575	Distribute Candies	C++	Easy	272
855	Exam Room	C++	Medium	271
803	Bricks Falling When Hit	C++	Hard	271
819	Most Common Word	C++	Easy	270
700	Search in a Binary Search Tree	C++	Easy	269
339	Nested List Weight Sum	C++	Easy	269
707	Design Linked List	C++	Easy	267
730	Count Different Palindromic Subsequences	C++	Hard	267
644	Maximum Average Subarray II	C++	Hard	267
369	Plus One Linked List	C++	Medium	267
859	Buddy Strings	C++	Easy	266
576	Out of Boundary Paths	C++	Medium	266
552	Student Attendance Record II	C++	Hard	265
482	License Key Formatting	C++	Easy	265
252	Meeting Rooms	C++	Easy	265
875	Koko Eating Bananas	C++	Medium	264
514	Freedom Trail	C++	Hard	264
886	Possible Bipartition	C++	Medium	263
926	Flip String to Monotone Increasing	C++	Medium	262
973	K Closest Points to Origin	C++	Medium	261
888	Fair Candy Swap	C++	Easy	261
623	Add One Row to Tree	C++	Medium	261
799	Champagne Tower	C++	Medium	259
715	Range Module	C++	Hard	259
320	Generalized Abbreviation	C++	Medium	259
877	Stone Game	C++	Medium	258
847	Shortest Path Visiting All Nodes	C++	Hard	257
361	Bomb Enemy	C++	Medium	257
284	Peeking Iterator	C++	Medium	257
186	Reverse Words in a String II	C++	Medium	257
846	Hand of Straights	C++	Medium	256
249	Group Shifted Strings	C++	Medium	256
165	Compare Version Numbers	C++	Medium	256
860	Lemonade Change	C++	Easy	255
703	Kth Largest Element in a Stream	C++	Easy	255
87	Scramble String	C++	Hard	255
852	Peak Index in a Mountain Array	C++	Easy	253
651	4 Keys Keyboard	C++	Medium	253
326	Power of Three	C++	Easy	252
294	Flip Game II	C++	Medium	252
754	Reach a Number	C++	Easy	251
837	New 21 Game	C++	Medium	250
590	N-ary Tree Postorder Traversal	C++	Easy	250
250	Count Univalue Subtrees	C++	Medium	250
639	Decode Ways II	C++	Hard	249
764	Largest Plus Sign	C++	Medium	248
351	Android Unlock Patterns	C++	Medium	247
319	Bulb Switcher	C++	Medium	247
709	To Lower Case	C++	Easy	246
950	Reveal Cards In Increasing Order	C++	Medium	245
433	Minimum Genetic Mutation	C++	Medium	244
818	Race Car	C++	Hard	243
398	Random Pick Index	C++	Medium	243
396	Rotate Function	C++	Medium	243
296	Best Meeting Point	C++	Hard	243
281	Zigzag Iterator	C++	Medium	243
311	Sparse Matrix Multiplication	C++	Medium	241
358	Rearrange String k Distance Apart	C++	Hard	240
827	Making A Large Island	C++	Hard	239
706	Design HashMap	C++	Easy	239
717	1-bit and 2-bit Characters	C++	Easy	239
624	Maximum Distance in Arrays	C++	Easy	239
536	Construct Binary Tree from String	C++	Medium	237
922	Sort Array By Parity II	C++	Easy	236
675	Cut Off Trees for Golf Event	C++	Hard	236
400	Nth Digit	C++	Easy	236
934	Shortest Bridge	C++	Medium	235
495	Teemo Attacking	C++	Medium	235
291	Word Pattern II	C++	Hard	235
753	Cracking the Safe	C++	Hard	234
243	Shortest Word Distance	C++	Easy	234
52	N-Queens II	C++	Hard	234
384	Shuffle an Array	C++	Medium	233
938	Range Sum of BST	C++	Medium	232
664	Strange Printer	C++	Hard	232
405	Convert a Number to Hexadecimal	C++	Easy	231
811	Subdomain Visit Count	C++	Easy	230
541	Reverse String II	C++	Easy	230
267	Palindrome Permutation II	C++	Medium	230
223	Rectangle Area	C++	Medium	229
896	Monotonic Array	C++	Easy	227
870	Advantage Shuffle	C++	Medium	227
992	Subarrays with K Different Integers	C++	Hard	226
738	Monotone Increasing Digits	C++	Medium	225
357	Count Numbers with Unique Digits	C++	Medium	223
251	Flatten 2D Vector	C++	Medium	223
768	Max Chunks To Make Sorted II	C++	Hard	222
897	Increasing Order Search Tree	C++	Easy	221
861	Score After Flipping Matrix	C++	Medium	221
842	Split Array into Fibonacci Sequence	C++	Medium	221
790	Domino and Tromino Tiling	C++	Medium	221
691	Stickers to Spell Word	C++	Hard	221
472	Concatenated Words	C++	Hard	221
780	Reaching Points	C++	Hard	220
539	Minimum Time Difference	C++	Medium	220
843	Guess the Word	C++	Hard	219
471	Encode String with Shortest Length	C++	Hard	219
921	Minimum Add to Make Parentheses Valid	C++	Medium	217
881	Boats to Save People	C++	Medium	216
663	Equal Tree Partition	C++	Medium	216
360	Sort Transformed Array	C++	Medium	216
931	Minimum Falling Path Sum	C++	Medium	215
528	Random Pick with Weight	C++	Medium	215
600	Non-negative Integers without Consecutive Ones	C++	Hard	214
391	Perfect Rectangle	C++	Hard	212
959	Regions Cut By Slashes	C++	Medium	211
898	Bitwise ORs of Subarrays	C++	Medium	211
880	Decoded String at Index	C++	Medium	211
568	Maximum Vacation Days	C++	Hard	211
853	Car Fleet	C++	Medium	210
609	Find Duplicate File in System	C++	Medium	210
962	Maximum Width Ramp	C++	Medium	209
263	Ugly Number	C++	Easy	208
917	Reverse Only Letters	C++	Easy	207
774	Minimize Max Distance to Gas Station	C++	Hard	207
374	Guess Number Higher or Lower	C++	Easy	207
429	N-ary Tree Level Order Traversal	C++	Easy	206
742	Closest Leaf in a Binary Tree	C++	Medium	206
545	Boundary of Binary Tree	C++	Medium	206
271	Encode and Decode Strings	C++	Medium	206
968	Binary Tree Cameras	C++	Hard	205
622	Design Circular Queue	C++	Medium	205
667	Beautiful Arrangement II	C++	Medium	205
975	Odd Even Jump	C++	Hard	204
655	Print Binary Tree	C++	Medium	204
390	Elimination Game	C++	Medium	204
826	Most Profit Assigning Work	C++	Medium	202
805	Split Array With Same Average	C++	Hard	202
247	Strobogrammatic Number II	C++	Medium	201
817	Linked List Components	C++	Medium	200
704	Binary Search	C++	Easy	200
884	Uncommon Words from Two Sentences	C++	Easy	198
946	Validate Stack Sequences	C++	Medium	197
744	Find Smallest Letter Greater Than Target	C++	Easy	197
974	Subarray Sums Divisible by K	C++	Medium	196
772	Basic Calculator III	C++	Hard	196
732	My Calendar III	C++	Hard	196
779	K-th Symbol in Grammar	C++	Medium	195
939	Minimum Area Rectangle	C++	Medium	194
775	Global and Local Inversions	C++	Medium	194
914	X of a Kind in a Deck of Cards	C++	Easy	193
786	K-th Smallest Prime Fraction	C++	Hard	193
777	Swap Adjacent in LR String	C++	Medium	193
589	N-ary Tree Preorder Traversal	C++	Easy	192
465	Optimal Account Balancing	C++	Hard	192
436	Find Right Interval	C++	Medium	192
1171	Remove Zero Sum Consecutive Nodes from Linked List	C++	Medium	192
629	K Inverse Pairs Array	C++	Hard	191
397	Integer Replacement	C++	Medium	191
306	Additive Number	C++	Medium	190
830	Positions of Large Groups	C++	Easy	189
747	Largest Number At Least Twice of Others	C++	Easy	189
649	Dota2 Senate	C++	Medium	189
544	Output Contest Matches	C++	Medium	189
353	Design Snake Game	C++	Medium	189
275	H-Index II	C++	Medium	189
925	Long Pressed Name	C++	Easy	188
901	Online Stock Span	C++	Medium	188
266	Palindrome Permutation	C++	Easy	188
726	Number of Atoms	C++	Hard	187
930	Binary Subarrays With Sum	C++	Medium	186
828	Unique Letter String	C++	Hard	185
977	Squares of a Sorted Array	C++	Easy	184
759	Employee Free Time	C++	Hard	183
506	Relative Ranks	C++	Easy	182
562	Longest Line of Consecutive One in Matrix	C++	Medium	180
441	Arranging Coins	C++	Easy	180
163	Missing Ranges	C++	Medium	180
745	Prefix and Suffix Search	C++	Hard	179
867	Transpose Matrix	C++	Easy	178
788	Rotated Digits	C++	Easy	178
598	Range Addition II	C++	Easy	178
920	Number of Music Playlists	C++	Hard	176
864	Shortest Path to Get All Keys	C++	Hard	176
517	Super Washing Machines	C++	Hard	176
359	Logger Rate Limiter	C++	Easy	176
823	Binary Trees With Factors	C++	Medium	175
502	IPO	C++	Hard	175
244	Shortest Word Distance II	C++	Medium	173
951	Flip Equivalent Binary Trees	C++	Medium	172
661	Image Smoother	C++	Easy	172
484	Find Permutation	C++	Medium	171
915	Partition Array into Disjoint Intervals	C++	Medium	170
835	Image Overlap	C++	Medium	168
439	Ternary Expression Parser	C++	Medium	168
940	Distinct Subsequences II	C++	Hard	164
923	3Sum With Multiplicity	C++	Medium	163
958	Check Completeness of a Binary Tree	C++	Medium	162
829	Consecutive Numbers Sum	C++	Hard	162
756	Pyramid Transition Matrix	C++	Medium	162
352	Data Stream as Disjoint Intervals	C++	Hard	161
935	Knight Dialer	C++	Medium	160
385	Mini Parser	C++	Medium	159
440	K-th Smallest in Lexicographical Order	C++	Hard	155
233	Number of Digit One	C++	Hard	155
156	Binary Tree Upside Down	C++	Medium	155
994	Rotting Oranges	C++	Easy	154
604	Design Compressed String Iterator	C++	Easy	154
911	Online Election	C++	Medium	153
850	Rectangle Area II	C++	Hard	153
537	Complex Number Multiplication	C++	Medium	153
157	Read N Characters Given Read4	C++	Easy	153
428	Serialize and Deserialize N-ary Tree	C++	Hard	152
640	Solve the Equation	C++	Medium	152
444	Sequence Reconstruction	C++	Medium	152
722	Remove Comments	C++	Medium	151
990	Satisfiability of Equality Equations	C++	Medium	150
825	Friends Of Appropriate Ages	C++	Medium	150
798	Smallest Rotation with Highest Score	C++	Hard	150
699	Falling Squares	C++	Hard	150
1002	Find Common Characters	C++	Easy	149
910	Smallest Range II	C++	Medium	149
851	Loud and Rich	C++	Medium	149
761	Special Binary String	C++	Hard	149
961	N-Repeated Element in Size 2N Array	C++	Easy	148
762	Prime Number of Set Bits in Binary Representation	C++	Easy	147
1011	Capacity To Ship Packages Within D Days	C++	Medium	146
932	Beautiful Array	C++	Medium	145
913	Cat and Mouse	C++	Hard	145
757	Set Intersection Size At Least Two	C++	Hard	145
833	Find And Replace in String	C++	Medium	144
1004	Max Consecutive Ones III	C++	Medium	143
635	Design Log Storage System	C++	Medium	143
365	Water and Jug Problem	C++	Medium	143
916	Word Subsets	C++	Medium	142
986	Interval List Intersections	C++	Medium	141
848	Shifting Letters	C++	Medium	141
723	Candy Crush	C++	Medium	141
965	Univalued Binary Tree	C++	Easy	140
956	Tallest Billboard	C++	Hard	140
820	Short Encoding of Words	C++	Medium	140
806	Number of Lines To Write String	C++	Easy	139
507	Perfect Number	C++	Easy	139
781	Rabbits in Forest	C++	Medium	138
854	K-Similar Strings	C++	Hard	137
839	Similar String Groups	C++	Hard	136
504	Base 7	C++	Easy	136
903	Valid Permutations for DI Sequence	C++	Hard	135
564	Find the Closest Palindrome	C++	Hard	135
551	Student Attendance Record I	C++	Easy	135
879	Profitable Schemes	C++	Hard	133
824	Goat Latin	C++	Easy	133
883	Projection Area of 3D Shapes	C++	Easy	132
710	Random Pick with Blacklist	C++	Hard	132
457	Circular Array Loop	C++	Medium	131
945	Minimum Increment to Make Array Unique	C++	Medium	130
434	Number of Segments in a String	C++	Easy	130
302	Smallest Rectangle Enclosing Black Pixels	C++	Hard	130
976	Largest Perimeter Triangle	C++	Easy	129
893	Groups of Special-Equivalent Strings	C++	Easy	129
892	Surface Area of 3D Shapes	C++	Easy	129
527	Word Abbreviation	C++	Hard	129
587	Erect the Fence	C++	Hard	128
393	UTF-8 Validation	C++	Medium	127
736	Parse Lisp Expression	C++	Hard	126
953	Verifying an Alien Dictionary	C++	Easy	125
858	Mirror Reflection	C++	Medium	125
531	Lonely Pixel I	C++	Medium	125
924	Minimize Malware Spread	C++	Hard	124
488	Zuma Game	C++	Hard	124
981	Time Based Key-Value Store	C++	Medium	123
492	Construct the Rectangle	C++	Easy	123
1014	Best Sightseeing Pair	C++	Medium	121
588	Design In-Memory File System	C++	Hard	121
509	Fibonacci Number	C++	Easy	120
593	Valid Square	C++	Medium	120
548	Split Array with Equal Sum	C++	Medium	120
666	Path Sum IV	C++	Medium	119
553	Optimal Division	C++	Medium	119
1000	Minimum Cost to Merge Stones	C++	Hard	118
943	Find the Shortest Superstring	C++	Hard	118
789	Escape The Ghosts	C++	Medium	117
372	Super Pow	C++	Medium	117
734	Sentence Similarity	C++	Easy	116
656	Coin Path	C++	Hard	116
869	Reordered Power of 2	C++	Medium	115
1008	Construct Binary Search Tree from Preorder Traversal	C++	Medium	114
941	Valid Mountain Array	C++	Easy	113
702	Search in a Sorted Array of Unknown Size	C++	Medium	113
592	Fraction Addition and Subtraction	C++	Medium	113
422	Valid Word Square	C++	Easy	113
246	Strobogrammatic Number	C++	Easy	113
960	Delete Columns to Make Sorted III	C++	Hard	112
919	Complete Binary Tree Inserter	C++	Medium	112
423	Reconstruct Original Digits from English	C++	Medium	112
980	Unique Paths III	C++	Hard	111
933	Number of Recent Calls	C++	Easy	111
891	Sum of Subsequence Widths	C++	Hard	111
468	Validate IP Address	C++	Medium	110
705	Design HashSet	C++	Easy	109
993	Cousins in Binary Tree	C++	Easy	106
985	Sum of Even Numbers After Queries	C++	Easy	106
868	Binary Gap	C++	Easy	106
900	RLE Iterator	C++	Medium	104
755	Pour Water	C++	Medium	103
955	Delete Columns to Make Sorted II	C++	Medium	102
909	Snakes and Ladders	C++	Medium	102
499	The Maze III	C++	Hard	102
248	Strobogrammatic Number III	C++	Hard	102
996	Number of Squareful Arrays	C++	Hard	101
748	Shortest Completing Word	C++	Easy	101
995	Minimum Number of K Consecutive Bit Flips	C++	Hard	100
988	Smallest String Starting From Leaf	C++	Medium	100
969	Pancake Sorting	C++	Medium	100
245	Shortest Word Distance III	C++	Medium	100
812	Largest Triangle Area	C++	Easy	97
466	Count The Repetitions	C++	Hard	97
708	Insert into a Cyclic Sorted List	C++	Medium	96
427	Construct Quad Tree	C++	Easy	96
522	Longest Uncommon Subsequence II	C++	Medium	96
991	Broken Calculator	C++	Medium	95
379	Design Phone Directory	C++	Medium	95
971	Flip Binary Tree To Match Preorder Traversal	C++	Medium	94
411	Minimum Unique Word Abbreviation	C++	Hard	94
954	Array of Doubled Pairs	C++	Medium	93
711	Number of Distinct Islands II	C++	Hard	93
899	Orderly Queue	C++	Hard	92
878	Nth Magical Number	C++	Hard	92
573	Squirrel Simulation	C++	Medium	92
809	Expressive Words	C++	Medium	91
356	Line Reflection	C++	Medium	90
758	Bold Words in String	C++	Easy	89
952	Largest Component Size by Common Factor	C++	Hard	88
794	Valid Tic-Tac-Toe State	C++	Medium	88
793	Preimage Size of Factorial Zeroes Function	C++	Hard	87
997	Find the Town Judge	C++	Easy	85
672	Bulb Switcher II	C++	Medium	85
908	Smallest Range I	C++	Easy	83
902	Numbers At Most N Given Digit Set	C++	Hard	83
634	Find the Derangement of An Array	C++	Medium	83
497	Random Point in Non-overlapping Rectangles	C++	Medium	82
483	Smallest Good Base	C++	Hard	82
989	Add to Array-Form of Integer	C++	Easy	81
984	String Without AAA or BBB	C++	Medium	81
641	Design Circular Deque	C++	Medium	81
808	Soup Servings	C++	Medium	81
885	Spiral Matrix III	C++	Medium	80
1001	Grid Illumination	C++	Hard	79
937	Reorder Log Files	C++	Easy	79
882	Reachable Nodes In Subdivided Graph	C++	Hard	79
519	Random Flip Matrix	C++	Medium	79
408	Valid Word Abbreviation	C++	Easy	79
948	Bag of Tokens	C++	Medium	78
478	Generate Random Point in a Circle	C++	Medium	78
481	Magical String	C++	Medium	78
420	Strong Password Checker	C++	Hard	78
1010	Pairs of Songs With Total Durations Divisible by 60	C++	Easy	76
987	Vertical Order Traversal of a Binary Tree	C++	Medium	76
927	Three Equal Parts	C++	Hard	76
866	Prime Palindrome	C++	Medium	75
936	Stamping The Sequence	C++	Hard	74
782	Transform to Chessboard	C++	Hard	73
335	Self Crossing	C++	Hard	73
967	Numbers With Same Consecutive Differences	C++	Medium	72
479	Largest Palindrome Product	C++	Hard	72
816	Ambiguous Coordinates	C++	Medium	70
957	Prison Cells After N Days	C++	Medium	67
660	Remove 9	C++	Hard	67
1019	Next Greater Node In Linked List	C++	Medium	66
874	Walking Robot Simulation	C++	Easy	66
978	Longest Turbulent Subarray	C++	Medium	65
928	Minimize Malware Spread II	C++	Hard	65
840	Magic Squares In Grid	C++	Easy	64
1005	Maximize Sum Of Array After K Negations	C++	Easy	63
751	IP to CIDR	C++	Easy	63
625	Minimum Factorization	C++	Medium	63
288	Unique Word Abbreviation	C++	Medium	62
631	Design Excel Sum Formula	C++	Hard	61
999	Available Captures for Rook	C++	Easy	60
293	Flip Game	C++	Easy	60
964	Least Operators to Express Number	C++	Hard	59
431	Encode N-ary Tree to Binary Tree	C++	Hard	59
998	Maximum Binary Tree II	C++	Medium	57
949	Largest Time for Given Digits	C++	Easy	57
1013	Partition Array Into Three Parts With Equal Sum	C++	Easy	55
1012	Numbers With Repeated Digits	C++	Hard	55
1003	Check If Word Is Valid After Substitutions	C++	Medium	55
970	Powerful Integers	C++	Easy	53
966	Vowel Spellchecker	C++	Medium	53
469	Convex Polygon	C++	Medium	52
591	Tag Validator	C++	Hard	50
1020	Number of Enclaves	C++	Medium	47
982	Triples with Bitwise AND Equal To Zero	C++	Hard	45
963	Minimum Area Rectangle II	C++	Medium	44
906	Super Palindromes	C++	Hard	44
822	Card Flipping Game	C++	Medium	44
749	Contain Virus	C++	Hard	44
831	Masking Personal Information	C++	Medium	41
1015	Smallest Integer Divisible by K	C++	Medium	40
1007	Minimum Domino Rotations For Equal Row	C++	Medium	40
558	Quad Tree Intersection	C++	Easy	38
944	Delete Columns to Make Sorted	C++	Easy	37
810	Chalkboard XOR Game	C++	Hard	37
800	Similar RGB Color	C++	Easy	37
770	Basic Calculator IV	C++	Hard	36
533	Lonely Pixel II	C++	Medium	35
510	Inorder Successor in BST II	C++	Medium	34
555	Split Concatenated Strings	C++	Medium	32
1006	Clumsy Factorial	C++	Medium	31
1009	Complement of Base 10 Integer	C++	Easy	29
1016	Binary String With Substrings Representing 1 To N	C++	Medium	24
1018	Binary Prefix Divisible By 5	C++	Easy	22
972	Equal Rational Numbers	C++	Hard	16
1358	Numbers of Substrings Containing All Three Characters	C++	Medium	108