MAANG Interview Questions

Meta, Amazon, Apple, Netflix, and Google (MAANG) are some of the biggest tech companies in the world.

A job at MAANG comes with global acknowledgment, huge opportunities for growth and exposure, hefty salary packages, and perks. Due to these excellent career opportunities, MAANG companies tempt all career-seekers.

To ace MAANG interviews, a well-defined preparation strategy is essential. And as the trendsetters of the high-tech world, it is crucial to have a sound knowledge of basic programming fundamentals. Recruiters at MAANG seek only the highly-skilled candidate.

The interview is one of the most grueling phases of a job seeker’s life. In fact, the interview process at Facebook, Apple, Amazon, Netflix, and Google, among many other top tech companies, is unlike anything that job seekers have ever experienced. Not only are the applications notoriously difficult, but their interviews are wild.

The most coveted career goals of all tech graduates are to get a job at FAANG (Facebook, Amazon, Apple, Netflix & Google) companies. This is mainly because their work culture is quite balanced and directed towards maximum productivity. Along with that their career growth options and trajectory are fascinating and the astounding salary just adds a cherry on top of the icing.

You can practice the below MAANG Interview Questions for the interview. We have collected past MAANG Interview Questions for your reference.

Top maang interview questions

S.No	Interview Question	Number of times asked
1	Two Sum Leetcode Solution	43848
2	Maximum occurring character in a string	19914
3	Plus One Leetcode Solution	19627
4	Valid Parentheses LeetCode Solution	19416
5	3Sum Leetcode Solution	17719
6	Merge Sorted Arrays Leetcode Solution	15559
7	First Repeating Element	15376
8	Single Number Leetcode Solution	15073
9	Count Primes Leetcode Solutions	14861
10	Pow(x, n) Leetcode Solution	14780
11	Sqrt(x) Leetcode Solution	14564
12	Meeting Rooms II LeetCode Solution	13588
13	Concatenation of Array LeetCode Solution	13048
14	Roman to Integer Leetcode Solution	12191
15	Valid Palindrome Leetcode Solution	12012
16	Search Insert Position Leetcode Solution	11928
17	Contains Duplicate II Leetcode Solution	11916
18	Palindrome Number LeetCode Solution	11767
19	Remove Duplicates from Sorted Array Leetcode Solution	11610
20	Jump Game Leetcode Solution	11342
21	Reverse Vowels of a String Leetcode Solution	11293
22	Longest Substring Without Repeating Characters LeetCode Solution	11281
23	Number of Good Pairs Leetcode Solution	11278
24	Intersection of Two Arrays II Leetcode Solution	11235
25	Spiral Matrix LeetCode Solution	11000
26	House Robber Leetcode Solution	10945
27	Kids With the Greatest Number of Candies Leetcode Solution	10914
28	Add Binary Leetcode Solution	10806
29	Maximum Subarray Leetcode Solution	10465
30	Number Of 1 bits	10407
31	Find the Maximum Repeating Number in Array	10183
32	Text Justification LeetCode Solution	10100
33	Move Zeroes LeetCode Solution	9974
34	Jewels and Stones Leetcode Solution	9947
35	Min Stack Leetcode Solution	9937
36	Power of Two Leetcode Solution	9694
37	Longest Palindromic Substring LeetCode Solution	9687
38	Permutations Leetcode Solution	9653
39	Shuffle String Leetcode Solution	9643
40	Word Search Leetcode Solution	9556
41	Third Maximum Number Leetcode Solution	9495
42	Daily Temperatures Leetcode Solution	9491
43	Evaluation of Postfix Expression	9460
44	Find All Numbers Disappeared in an Array Leetcode Solution	9448
45	Median of Two Sorted Arrays LeetCode Solution	9416
46	Next Permutation Leetcode Solution	9346
47	Search in Rotated Sorted Array Leetcode Solution	9334
48	Number of Islands LeetCode Solution	9226
49	Kth Missing Positive Number Leetcode Solution	9208
50	Maximum Profit in Job Scheduling Leetcode Solution	9203
51	Next Greater Element I Leetcode Solution	9123
52	Longest Common Prefix Leetcode Solution	9078
53	Frog Jump Leetcode Solution	8931
54	Valid Anagram Leetcode Solution	8881
55	Running Sum of 1d Array Leetcode Solution	8798
56	Find Minimum Distance Between Two Numbers in an Array	8776
57	Shuffle the Array Leetcode Solution	8764
58	Rotate Image LeetCode Solution	8705
59	Combination Sum Leetcode Solution	8673
60	Multiply Strings Leetcode Solution	8664
61	Can Place Flowers LeetCode Solution	8654
62	Boolean Parenthesization Problem	8599
63	House Robber II Leetcode Solution	8588
64	Count and Say Leetcode Solution	8571
65	3Sum Closest LeetCode Solution	8503
66	Bulb Switcher LeetCode Solution	8452
67	Koko Eating Bananas Leetcode Solution	8373
68	Best Time to Buy and Sell Stock LeetCode Solution	8343
69	Subarray and Subsequence	8275
70	Excel Sheet Column Title Leetcode Solution	8263
71	Happy Number Leetcode Solution	8257
72	Isomorphic Strings Leetcode Solution	8212
73	Majority Element Leetcode Solution	8191
74	Candy LeetCode Solution	8183
75	Missing Number Leetcode Solution	8149
76	Count Pairs With Given Sum	8125
77	Integer to Roman Leetcode Solution	8123
78	Product of array except self	8024
79	A Product Array Puzzle	8019
80	Rotate String LeetCode Solution	7992
81	Strobogrammatic Number LeetCode Solution	7973
82	Binary Search LeetCode Solution	7908
83	Reverse String Without Temporary Variable	7866
84	Is Subsequence Leetcode Solution	7859
85	Find the Difference Leetcode Solution	7832
86	Find the Duplicate Number LeetCode Solution	7829
87	Expression Evaluation	7799
88	Largest Number Leetcode Solution	7794
89	Find Common Characters Leetcode Solution	7775
90	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7654
91	String to Integer (atoi) LeetCode Solution	7626
92	Subset Leetcode	7615
93	Rabin Karp Algorithm	7589
94	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7573
95	Summary Ranges Leetcode Solution	7516
96	Set Matrix Zeroes	7493
97	Balanced Binary Tree Leetcode Solution	7451
98	Word Pattern LeetCode Solution	7418
99	Sort Characters By Frequency LeetCode Solution	7399
100	Find the Town Judge Leetcode Solution	7392
101	Find the Winner of the Circular Game LeetCode Solution	7358
102	Unique Paths Leetcode Solution	7336
103	Arranging Coins Leetcode Solution	7331
104	Rearrange Positive and Negative Numbers Alternatively in Array	7295
105	Group Anagrams LeetCode Solution	7258
106	Postfix to Infix Conversion	7256
107	String Compression LeetCode Solution	7182
108	Asteroid Collision LeetCode Solution	7151
109	Page Replacement Algorithms in Operating Systems	7111
110	Repeated Substring Pattern LeetCode Solution	7071
111	Smallest window in a string containing all characters of another string	7045
112	Sort Colors LeetCode Solution	6996
113	Best Time to Buy and Sell Stock II Leetcode Solution	6992
114	Matrix Chain Multiplication using Dynamic Programming	6992
115	Sum of minimum and maximum elements of all subarrays of size k	6857
116	Sort Array By Parity LeetCode Solution	6855
117	Zigzag Conversion LeetCode Solution	6832
118	Kth largest element in an Array Leetcode Solutions	6821
119	Valid Palindrome II Leetcode Solution	6813
120	Divide Two Integers Leetcode Solution	6775
121	Generate Parentheses Leetcode Solution	6771
122	Find the Row with Maximum Number of 1’s	6740
123	Assign Cookies Leetcode Solution	6735
124	Decode String Leetcode Solution	6721
125	Pascal Triangle Leetcode	6719
126	Product of Array Except Self LeetCode Solution	6654
127	Reverse Integer Leetcode Solution	6642
128	Remove Duplicates from Sorted Array II Leetcode Solution	6641
129	H-Index Leetcode Solution	6628
130	Length of Last Word Leetcode Solution	6624
131	Bus Routes Leetcode Solution	6570
132	Number of Provinces Leetcode Solution	6545
133	Prefix to Infix Conversion	6527
134	Merge Two Sorted Lists Leetcode Solutions	6525
135	Linked List Cycle II LeetCode Solution	6480
136	Minimum Steps to reach target by a Knight	6456
137	Convert array into Zig-Zag fashion	6455
138	Minimum Cost For Tickets Leetcode Solution	6435
139	Employee Free Time LeetCode Solution	6434
140	Optimal Account Balancing LeetCode Solution	6428
141	Defanging an IP Address Leetcode Solution	6409
142	Pascal’s Triangle II Leetcode Solution	6369
143	Find First and Last Position of Element in Sorted Array Leetcode Solution	6341
144	Island Perimeter Leetcode Solution	6318
145	Bellman Ford Algorithm	6288
146	Implementation of Deque using Doubly Linked List	6284
147	OSI Model	6257
148	First element occurring k times in an array	6243
149	Merge Sorted Array LeetCode Solution	6239
150	Increasing Triplet Subsequence LeetCode Solution	6235
151	Majority Element II Leetcode Solution	6210
152	Build Array From Permutation Leetcode Solution	6203
153	KMP Algorithm	6195
154	Robot Room Cleaner Leetcode Solution	6188
155	Max Consecutive Ones Leetcode Solution	6154
156	Guess Number Higher or Lower LeetCode Solution	6142
157	Find Pair with Given Difference	6115
158	Check if the Elements of an Array are Consecutive	6112
159	K-th Smallest Element in a Sorted Matrix	6097
160	Swap Nodes in Pairs Leetcode Solutions	6087
161	Add Two Numbers II Leetcode Solution	6062
162	Find the Missing Number	6058
163	Set Matrix Zeroes Leetcode Solution	6057
164	Lemonade Change Leetcode Solution	6042
165	Trapping Rain Water Leetcode Solution	5992
166	First negative integer in every window of size k	5991
167	Design Parking System Leetcode Solution	5982
168	Fibonacci Number LeetCode Solution	5973
169	Subarray Sum Equals K LeetCode Solution	5950
170	Delete middle element of a stack	5935
171	Word Ladder LeetCode Solution	5903
172	First Unique Character in a String LeetCode Solution	5902
173	Last Stone Weight	5896
174	Coin Change 2 Leetcode Solution	5891
175	Subarray with Given Sum	5880
176	Length of the largest subarray with contiguous elements	5871
177	Monotonic Array LeetCode Solution	5869
178	String Compression	5864
179	Capacity To Ship Packages Within D Days Leetcode Solution	5861
180	Find All Duplicates in an Array LeetCode Solution	5859
181	Subarray Product Less Than K LeetCode Solution	5842
182	Form Minimum Number from Given Sequence of D’s and I’s	5831
183	Repeated Substring Pattern	5823
184	Palindrome Linked List Leetcode Solution	5807
185	Single Element in a Sorted Array LeetCode Solution	5804
186	Find Smallest Missing Number in a Sorted Array	5775
187	Leetcode Permutations	5719
188	Continuous Subarray Sum LeetCode Solution	5705
189	01 Matrix LeetCode Solution	5685
190	Remove Duplicates from Sorted List II LeetCode Solution	5684
191	Combinations Leetcode Solution	5671
192	Prefix to Postfix Conversion	5669
193	Combination Sum	5626
194	Break a Palindrome LeetCode Solution	5610
195	Reverse Words in a String III LeetCode Solution	5610
196	Valid Perfect Square Leetcode Solution	5598
197	Iterative Implementation of Quick Sort	5597
198	Remove Linked List Elements Leetcode Solution	5594
199	Same Tree LeetCode Solution	5585
200	Insert Delete GetRandom O(1) Leetcode Solution	5557
201	Merge k Sorted Lists Leetcode Solution	5536
202	Rotate List Leetcode Solution	5535
203	Container With Most Water LeetCode Solution	5528
204	Contains Duplicate LeetCode Solution	5526
205	Relative Ranks Leetcode Solution	5523
206	Top K Frequent Elements LeetCode Solution	5511
207	Slowest Key Leetcode Solution	5508
208	Backspace String Compare	5479
209	Find Peak Element LeetCode Solution	5468
210	Cuckoo sequence program	5459
211	Maximum Product of Three Numbers LeetCode Solution	5443
212	Subarray Sum Equals k	5390
213	Palindrome Number	5386
214	Find the Duplicate Element	5373
215	Printing brackets in Matrix Chain Multiplication Problem	5366
216	Kth Largest Element in a Stream Leetcode Solution	5361
217	The K Weakest Rows in a Matrix Leetcode Solution	5355
218	Longest Common Subsequence LeetCode Solution	5340
219	Max Area of Island	5299
220	Second Most Repeated Word in a Sequence	5287
221	Find Leaders in an Array	5287
222	Remove All Occurrences of a Substring LeetCode Solution	5274
223	Rearrange given Array in Maximum Minimum Form	5269
224	Generate all Binary Strings Without Consecutive 1’s	5266
225	Relative Sort Array Leetcode Solution	5256
226	Unique Paths II Leetcode Solution	5253
227	Scramble String	5252
228	Check If Two String Arrays are Equivalent Leetcode Solution	5250
229	Convert a Number to Hexadecimal Leetcode Solution	5237
230	Permutation in String Leetcode Solution	5231
231	Arithmetic Expression Evaluation	5228
232	Make The String Great Leetcode Solution	5221
233	Target Sum	5221
234	Find Triplet in Array With a Given Sum	5212
235	Delete Node in a Linked List Leetcode Solution	5195
236	Letter Combinations of a Phone Number	5185
237	Count Good Nodes in Binary Tree Leetcode Solution	5175
238	N-Queens LeetCode Solution	5167
239	Time Based Key-Value Store LeetCode Solution	5162
240	Moving Average from Data Stream Leetcode Solution	5157
241	Construct Binary Tree from Given Inorder and Preorder Traversals	5148
242	Stone Game LeetCode	5139
243	Next Permutation	5117
244	LRU Cache LeetCode Solution	5104
245	Prim’s Algorithm	5101
246	Number of Dice Rolls With Target Sum LeetCode Solution	5090
247	Find N Unique Integers Sum up to Zero Leetcode Solution	5088
248	Minimum Operations to convert X to Y	5088
249	Check If N and Its Double Exist Leetcode Solution	5063
250	Remove Minimum Characters so that Two Strings Become Anagrams	5032
251	Min Stack	5031
252	Number of Steps to Reduce a Number to Zero Leetcode Solution	5024
253	Given two unsorted arrays find all pairs whose sum is x	5022
254	Flipping an Image LeetCode Solution	4983
255	Find The Duplicate Number	4967
256	Minimum Knight Moves LeetCode Solution	4960
257	Minimum swaps required to bring all elements less than or equal to k together	4956
258	Top K Frequent Elements	4952
259	Stock Buy Sell to Maximize Profit	4946
260	Min Cost Climbing Stairs LeetCode Solution	4938
261	Reverse Only Letters LeetCode Solution	4920
262	Student Attendance Record I Leetcode Solution	4918
263	Smallest Positive Number Missing in an Unsorted Array	4911
264	To Lower Case Leetcode Solution	4880
265	Maximum Sum Increasing Subsequence	4876
266	Single Number	4867
267	License Key Formatting Leetcode Solution	4866
268	Reverse words in a string	4849
269	The kth Factor of n Leetcode Solution	4844
270	Maximum Subarray Sum using Divide and Conquer	4843
271	Maximum Population Year LeetCode Solution	4785
272	Top K Frequent Words LeetCode Solution	4750
273	Sudoku Solver	4748
274	Longest Common Subsequence	4746
275	Find the Number Occurring Odd Number of Times in an Array	4726
276	BFS for Disconnected Graph	4717
277	Remove Nth Node From End of List Leetcode Solution	4708
278	Find Words That Can Be Formed by Characters Leetcode Solution	4700
279	Search Suggestions System LeetCode Solution	4696
280	Minimum Path Sum Leetcode Solution	4695
281	Reformat Date LeetCode Solution	4688
282	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4687
283	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4665
284	Reveal Cards In Increasing Order Leetcode Solution	4652
285	Maximum Depth of Binary Tree Leetcode Solution	4645
286	Sum of Subarray Ranges Leetcode Solution	4634
287	Intersection of Two Arrays	4631
288	Sort Elements by Frequency of Occurrences	4626
289	Maximum Size Subarray Sum Equals k Leetcode Solution	4624
290	Reverse Nodes in k-Group LeetCode Solution	4614
291	Best Time to Buy and Sell Stock III Leetcode Solution	4611
292	N-th Tribonacci Number Leetcode Solution	4604
293	House Robber	4598
294	Find any one of the multiple repeating elements in read only array	4590
295	Remove All Ones With Row and Column Flips Leetcode Solution	4577
296	Diagonal Traverse LeetCode Solution	4576
297	Evaluate Division	4575
298	Maximize Distance to Closest Person LeetCode Solution	4569
299	Most Frequent Element in an Array	4561
300	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4550
301	Range Sum Query 2D – Immutable Leetcode Solution	4549
302	Design A Leaderboard Leetcode Solution	4548
303	Binary Tree Inorder Traversal LeetCode Solution	4545
304	Reverse individual words	4542
305	Minimum Characters to be Added at Front to Make String Palindrome	4539
306	Length of Longest valid Substring	4538
307	Count of index pairs with equal elements in an array	4533
308	Find if Path Exists in Graph Leetcode Solution	4524
309	Last Stone Weight II LeetCode Solution	4510
310	Count Number of Occurrences in a Sorted Array	4504
311	Minimum number of Merge Operations to make an Array Palindrome	4490
312	Remove Duplicates from Sorted List LeetCode Solution	4486
313	Split Linked List in Parts Leetcode Solution	4481
314	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4473
315	Implement a stack using single queue	4472
316	Dijkstra Algorithm	4457
317	Find the Closest Palindrome number	4439
318	Brightest Position on Street LeetCode Solution	4437
319	Mobile Numeric Keypad Problem	4403
320	Arrange given Numbers to Form the Biggest Number II	4403
321	Find Leaves of Binary Tree LeetCode Solution	4401
322	Reverse Bits	4395
323	Special Positions in a Binary Matrix Leetcode Solution	4382
324	Spiral Matrix II Leetcode Solution	4371
325	Round Robin Scheduling	4368
326	Symmetric Tree Leetcode Solution	4367
327	Invalid Transactions LeetCode Solution	4358
328	Shortest Word Distance Leetcode Solution	4346
329	Maximum Subarray	4342
330	Paint House LeetCode Solution	4335
331	Recursion	4330
332	Maximal Square	4299
333	One Edit Distance LeetCode Solution	4291
334	Sort Array By Parity II Leetcode Solution	4289
335	Diagonal Traversal LeetCode Solution	4282
336	Hamming Distance Leetcode Solution	4282
337	Rank Transform of an Array Leetcode Solution	4281
338	Find Duplicates in an Array in Most Efficient Way	4281
339	Partition Labels LeetCode Solution	4268
340	Find Winner on a Tic Tac Toe Game Leetcode Solution	4267
341	Remove Invalid Parentheses Leetcode Solution	4250
342	Minimum Moves to Equal Array Elements Leetcode Solution	4250
343	Jump Game	4247
344	Tug of War	4245
345	Largest Rectangle in Histogram LeetCode Solution	4244
346	Alien Dictionary LeetCode Solution	4243
347	Count of Triplets With Sum Less than Given Value	4242
348	Unique Paths	4237
349	String Matching in an Array Leetcode Solution	4234
350	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4225
351	Postfix to Prefix Conversion	4212
352	Minimum Time to Collect All Apples in a Tree LeetCode Solution	4205
353	Unique Paths III LeetCode Solution	4194
354	The Celebrity Problem	4192
355	Next Permutation LeetCode Solution	4191
356	Given an Array of Pairs Find all Symmetric Pairs in it	4184
357	Validate Stack Sequences LeetCode Solution	4179
358	Merge Two Sorted Linked Lists	4176
359	Bitwise AND of Numbers Range LeetCode Solution	4173
360	Lowest Common Ancestor of a Binary Tree Leetcode Solution	4163
361	Minimum Depth of Binary Tree Leetcode Solution	4160
362	Construct BST from its given Level Order Traversal	4160
363	Minimum Time Visiting All Points Leetcode Solution	4157
364	Range Sum of BST LeetCode Solution	4155
365	Transpose Graph	4155
366	Least Number of Unique Integers after K Removals Leetcode Solution	4152
367	Smallest Subarray with k Distinct Numbers	4145
368	Minimum operation to make all elements equal in array	4144
369	Invert Binary Tree LeetCode Solution	4143
370	Maximum Circular Subarray Sum	4137
371	Toeplitz Matrix	4128
372	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	4124
373	Longest Common Prefix using Trie	4123
374	Clone Graph LeetCode Solution	4118
375	Pair of Positive Negative Values in an Array	4118
376	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	4101
377	Find minimum difference between any two elements	4100
378	Kruskal Algorithm	4093
379	Robot Bounded In Circle LeetCode Solution	4089
380	Ugly Number II LeetCode Solution	4089
381	Next Greater Element III LeetCode Solution	4086
382	Check whether Strings are K Distance Apart or Not	4086
383	3 Sum	4085
384	K Empty Slots LeetCode	4085
385	4Sum	4084
386	Find the First and Second Smallest Elements	4078
387	Longest Substring with At Most K Distinct Characters LeetCode Solution	4068
388	Check if a given array contains duplicate elements within k distance from each other	4058
389	Minimum Cost to Hire K Workers	4052
390	Max stack	4049
391	Substring with Concatenation of All Words Leetcode Solution	4047
392	LRU Cache Implementation	4044
393	Implementation of Deque using circular array	4035
394	Longest subarray not having more than K distinct elements	4030
395	Word Search	4029
396	Graph Valid Tree LeetCode Solution	4024
397	Sort a stack using a temporary stack	4013
398	Invert Binary Tree LeetCode Solution	4004
399	Minimize Maximum Pair Sum in Array LeetCode Solution	4004
400	Regular Expression Matching Regular Expression Matching LeetCode Solution	4003
401	Sliding Window Technique	4003
402	Stack Permutations (Check if an array is stack permutation of other)	3992
403	Permutation Sequence LeetCode Solution	3987
404	Stone Game II Leetcode	3987
405	Longest subsequence such that difference between adjacents is one	3985
406	Find the Smallest Divisor given a Threshold Leetcode Solution	3984
407	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3979
408	Non-decreasing Array LeetCode Solution	3977
409	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3976
410	Design Browser History LeetCode Solution	3969
411	Find duplicates in a given array when elements are not limited to a range	3968
412	Find the subarray with least average	3967
413	Priority Queue using doubly linked list	3966
414	Number Complement Leetcode Solution	3965
415	Top View of Binary Tree	3962
416	Kth Smallest Element in a BST Leetcode Solution	3961
417	Missing Element in Sorted Array LeetCode Solution	3954
418	Minesweeper LeetCode Solution	3953
419	Queries for counts of array elements with values in given range	3944
420	Number of Islands II LeetCode Solution	3942
421	LRU Cache Leetcode Solution	3941
422	Painting Fence Algorithm	3939
423	K Closest Points to Origin Leetcode Solution	3934
424	Maximum Number of Occurrences of a Substring Leetcode Solution	3934
425	Nth Catalan Number	3927
426	Common elements in all rows of a given matrix	3922
427	Partition List Leetcode Solution	3916
428	Path With Maximum Minimum Value LeetCode Solution	3910
429	Find the Peak Element from an Array	3907
430	First Circular Tour to Visit all the Petrol Bunks	3902
431	Fibonacci Number LeetCode Solution	3900
432	Snakes and Ladders LeetCode Solution	3897
433	Maximum Consecutive Numbers Present in an Array	3890
434	Can Make Arithmetic Progression From Sequence Leetcode Solution	3888
435	Number of Smaller Elements on Right Side	3885
436	Find Top K (or Most Frequent) Numbers in a Stream	3882
437	Sequences of given length where every element is more than or equal to twice of previous	3881
438	Sliding Window Maximum LeetCode Solution	3878
439	Sort elements by frequency	3870
440	Find Maximum Level sum in Binary Tree	3867
441	Combination Sum IV LeetCode Solution	3866
442	Gold Mine Problem	3859
443	Tiling Problem	3858
444	Integer Break LeetCode Solution	3856
445	Flood Fill LeetCode	3856
446	High Five LeetCode Solution	3849
447	Insert Interval Leetcode Solution	3845
448	Odd Even Linked List Leetcode Solution	3843
449	Search a 2D Matrix II Leetcode Solution	3840
450	Check if Two given Strings are Isomorphic to each other	3838
451	Count items common to both the lists but with different prices	3836
452	Find Minimum in Rotated Sorted Array II LeetCode Solution	3832
453	Move All the Zeros to the End of the Given Array	3831
454	N queen problem	3824
455	Rearrange array such that even positioned are greater than odd	3823
456	Distance of nearest cell having 1 in a binary matrix	3821
457	Shortest Palindrome	3821
458	Longest Palindrome can be Formed by Removing or Rearranging Characters	3814
459	Interval Tree	3795
460	Insert into a Binary Search Tree Leetcode Solution	3793
461	Consecutive Characters LeetCode Solution	3792
462	Replace Elements with Greatest Element on Right Side Leetcode Solution	3790
463	Trapping Rain Water LeetCode Solution	3785
464	Search in a Binary Search Tree Leetcode Solution	3784
465	Sort Colors	3779
466	Number of Closed Islands Leetcode Solution	3770
467	Design a stack that supports getMin() in O(1) time and O(1) extra space	3766
468	Kth Non-repeating Character	3765
469	Fibonacci numbers	3763
470	Longest Common Prefix using Sorting	3755
471	Find a Peak Element II LeetCode Solution	3754
472	Reverse a linked list	3751
473	Integer to English words	3745
474	Spiral Matrix III LeetCode Solution	3742
475	Find All Possible Recipes from Given Supplies LeetCode Solution	3739
476	Minimum Absolute Difference in BST Leetcode Solution	3739
477	Queries for GCD of all numbers of an array except elements in a given range	3733
478	Evaluate Reverse Polish Notation LeetCode Solution	3731
479	Decompress Run-Length Encoded List Leetcode Solution	3730
480	Expression Contains Redundant Bracket or Not	3730
481	Sliding Window Median Leetcode Solution	3722
482	Check If Array Pairs Are Divisible by k LeetCode Solution	3722
483	Vertical Order Traversal of Binary Tree LeetCode Solution	3713
484	Convert Sorted Array to Binary Search Tree Leetcode Solution	3710
485	Find Pythagorean Triplets from Array	3707
486	Coin Change Problem	3706
487	Restore IP Addresses Leetcode Solution	3705
488	Sorting array using Stacks	3700
489	Binary Tree Maximum Path Sum LeetCode Solution	3698
490	Palindrome Substring Queries	3696
491	Minimum Path Sum	3695
492	Morris Traversal	3674
493	Sort an array according to the order defined by another array	3671
494	Balanced Expression with Replacement	3671
495	Multiplication of Two Matrices	3669
496	Majority Element	3667
497	Priority Queue in C++	3662
498	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3658
499	Subset sum problem	3652
500	Camelcase Matching Leetcode Solution	3646
501	Best Time to Buy and Sell Stock	3645
502	Find the first Repeating Number in a Given Array	3636
503	Queue using Stacks	3628
504	Number of Days Between Two Dates LeetCode Solution	3627
505	Find Median from Data Stream LeetCode Solution	3622
506	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3620
507	Cells with Odd Values in a Matrix LeetCode Solution	3615
508	Path Crossing Leetcode Solution	3607
509	How to Implement Stack Using Priority Queue or Heap?	3607
510	Design Hit Counter LeetCode Solution	3600
511	Generate all Binary Strings from Given Pattern	3599
512	The Stock Span Problem	3594
513	Kth ancestor of a node in binary tree	3586
514	Count subarrays having total distinct elements same as original array	3583
515	Is Graph Bipartite? LeetCode Solution	3582
516	Sieve of Eratosthenes	3580
517	Detect a loop in the Linked List	3579
518	Path Sum II LeetCode Solution	3578
519	Intersection of Two Linked Lists LeetCode Solution	3571
520	Analyze User Website Visit Pattern LeetCode Solution	3570
521	Longest Increasing Path in a Matrix LeetCode Solution	3569
522	Shortest Completing Word Leetcode Solution	3567
523	Find a Fixed Point in a Given Array	3566
524	Pancake Sorting Problem	3564
525	Divide Chocolate LeetCode Solution	3559
526	Count Submatrices With All Ones LeetCode Solution	3555
527	Letter Case Permutation	3555
528	Monotonic Array Leetcode Solution	3550
529	Largest rectangular sub-matrix whose sum is 0	3543
530	Check if Array Contains Contiguous Integers With Duplicates Allowed	3539
531	Custom Sort String Leetcode Solution	3538
532	Construction of Longest Increasing Subsequence (N log N)	3535
533	Group Anagrams	3533
534	Minimum Height Trees	3528
535	Implement strStr() LeetCode Solution	3525
536	Maximum Element in an Array which is Increasing and then Decreasing	3522
537	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3520
538	Decode Ways	3519
539	Different Ways to Add Parentheses Leetcode Solution	3514
540	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3508
541	Merge Overlapping Intervals	3507
542	Valid Boomerang Leetcode Solution	3504
543	Find maximum length Snake sequence	3496
544	Queue based approach for first non-repeating character in a stream	3490
545	Nearest Exit from Entrance in Maze LeetCode Solution	3483
546	Number of Distinct Islands Leetcode Solution	3475
547	Scramble String LeetCode Solution	3474
548	How to Create Mergable Stack?	3472
549	Perfect Squares LeetCode Solution	3470
550	Find the Lost Element From a Duplicated Array	3469
551	Best Time to Buy and Sell Stock IV LeetCode Solution	3468
552	Shifting Letters LeetCode Solution	3467
553	Decode String	3467
554	Implement Trie (Prefix Tree) Leetcode Solution	3461
555	LCS (Longest Common Subsequence) of three strings	3454
556	Guess Number Higher or Lower II	3445
557	First missing positive	3444
558	Sliding Window Maximum	3443
559	Longest Common Prefix using Divide and Conquer	3443
560	Design Skiplist LeetCode Solution	3441
561	Most Stones Removed with Same Row or Column LeetCode Solution	3440
562	Reorder Data in Log Files LeetCode Solution	3440
563	Number of Equivalent Domino Pairs Leetcode Solution	3440
564	Maximum Sum of Non Consecutive Elements	3439
565	Sort a stack using recursion	3437
566	Champagne Tower LeetCode Solution	3432
567	Count Possible Triangles	3429
568	Find if an Expression has Duplicate Parenthesis or Not	3427
569	Recover Binary Search Tree	3424
570	Build an Array With Stack Operations Leetcode Solution	3422
571	Race Car LeetCode Solution	3421
572	Binary Tree zigzag level order Traversal	3421
573	All Possible Full Binary Trees LeetCode Solution	3415
574	Contiguous Array LeetCode Solution	3415
575	Rectangle Overlap LeetCode Solution	3412
576	Insert Node in the Sorted Linked List	3411
577	Largest Subarray with Equal Number of 0’s and 1’s	3410
578	Smallest Good Base	3393
579	Maximum Length of Chain Pairs	3393
580	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3387
581	Minimum Bracket Reversals	3383
582	Find the two Numbers with Odd Occurrences in an Unsorted Array	3374
583	Palindrome Permutation LeetCode Solution	3369
584	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3362
585	Longest Substring with At Least K Repeating Characters LeetCode Solution	3361
586	Minimum Height Trees LeetCode Solution	3357
587	Maximum Depth of N-ary Tree Leetcode Solution	3357
588	Maximum Number of Ways to Partition an Array LeetCode Solution	3356
589	Longest Repeated Subsequence	3355
590	Rearrange Spaces Between Words Leetcode Solution	3353
591	Design a Stack With Increment Operation Leetcode Solution	3350
592	Distance Between Bus Stops Leetcode Solution	3350
593	Find a Sorted Subsequence of size 3	3350
594	Recover Binary Search Tree Leetcode Solution	3347
595	Palindrome Partitioning Leetcode Solution	3340
596	Merge Two Binary Trees LeetCode Solution	3340
597	Find the Town Judge LeetCode Solution	3339
598	Implement Two Stacks in an Array	3338
599	Valid Parentheses Leetcode Solution	3332
600	K-th Distinct Element in an Array	3332
601	Subarrays with K Different Integers Leetcode Solution	3331
602	Reorder an Array According to the Given Indexes	3331
603	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3324
604	Print all Palindromic Partitions of a String	3323
605	Heap Sort	3321
606	Check for Balanced Parentheses in an Expression	3314
607	Huffman Coding	3308
608	Maximum sum rectangle in a 2D matrix	3299
609	Find the First Circular Tour that visits all the Petrol Pumps	3298
610	Minimum number of jumps to reach end	3295
611	Maximum Score After Splitting a String Leetcode Solution	3293
612	Count pair with Given Sum	3281
613	Contains Duplicate	3281
614	The Maze III LeetCode Solution	3279
615	Jump Game IV LeetCode Solution	3278
616	Sort a String According to Another String	3278
617	Merge Overlapping Intervals II	3278
618	Mean of Array After Removing Some Elements Leetcode Solution	3273
619	Maximize Elements Using Another Array	3272
620	Perform String Shifts Leetcode	3269
621	Palindrome Permutation	3257
622	Find First and Last Position of Element in Sorted Array LeetCode Solution	3249
623	Word Break	3246
624	Valid Sudoku	3239
625	Palindrome Permutations of a String	3235
626	Find the Minimum Element in a Sorted and Rotated Array	3235
627	Convert BST to Min Heap	3230
628	All Unique Triplets that Sum up to a Given Value	3222
629	Find Largest Value in Each Tree Row LeetCode Solution	3219
630	Minimum Jumps to Reach Home LeetCode Solution	3217
631	Possible Bipartition LeetCode Solution	3215
632	A Space Optimized DP solution for 0-1 Knapsack Problem	3215
633	Caesar Cipher	3215
634	Iterative Method to find Height of Binary Tree	3213
635	Find all triplets with zero sum	3212
636	Edit Distance LeetCode Solution	3206
637	Count Sub Islands LeetCode Solution	3200
638	Find Median from data Stream	3190
639	Palindromic Substrings Leetcode Solution	3183
640	My Calendar I LeetCode Solution	3183
641	Segregate 0s and 1s in an Array	3178
642	Reach a Number LeetCode Solution	3172
643	Best Meeting Point LeetCode Solution	3163
644	Find the Subarray of given length with Least Average	3161
645	Maximum Product of Splitted Binary Tree LeetCode Solution	3160
646	Number of palindromic paths in a matrix	3159
647	Level order Traversal in Spiral Form	3159
648	Merge Two Balanced Binary Search Trees	3147
649	Count Good Nodes in Binary Tree LeetCode Solution	3142
650	Pair with given product	3142
651	Check if the given array can represent Level Order Traversal of Binary Search Tree	3139
652	Word Pattern	3137
653	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	3135
654	Alien Dictionary	3133
655	Breadth First Search (BFS) for a Graph	3130
656	Validate Binary Search Tree	3118
657	Partition Problem	3116
658	Isomorphic Strings LeetCode Solution	3107
659	Brick Wall LeetCode Solution	3105
660	Convert Sorted List to Binary Search Tree	3100
661	Sorted Linked List to Balanced BST	3099
662	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	3093
663	Find whether a subarray is in form of a mountain or not	3089
664	Minimum time required to rot all oranges	3086
665	Add two numbers	3085
666	Swapping Nodes in a Linked List Leetcode Solution	3082
667	Maximize Sum of Array after K Negations Leetcode Solution	3081
668	Construct BST from given Preorder Traversal	3081
669	How to Efficiently Implement k Stacks in a Single Array?	3078
670	Sort 0s 1s and 2s in an Array	3075
671	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	3074
672	Rotate Array	3070
673	Populating Next Right Pointers in Each Node	3068
674	Largest Sum Contiguous Subarray	3066
675	Longest Subarray Having Count of 1s One More than Count of 0s	3064
676	Queries on Probability of Even or Odd Number in given Ranges	3063
677	Bubble sort using two Stacks	3063
678	Remove brackets from an algebraic string containing + and – operators	3061
679	Merge K Sorted Arrays and Print Sorted Output	3061
680	Print Fibonacci sequence using 2 variables	3056
681	Find all pairs (a, b) in an array such that a % b = k	3050
682	Range Sum Query 2D – Immutable LeetCode Solution	3046
683	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	3044
684	Find four elements that sum to a given value (Hashmap)	3043
685	Count ways to reach the nth stair using step 1, 2 or 3	3035
686	Maximum Number of Chocolates to be Distributed Equally Among k Students	3034
687	Count Distinct Elements in Every Window of Size K	3033
688	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	3026
689	Merge Two Sorted Lists Leetcode	3018
690	Maximum Frequency Stack Leetcode Solution	3016
691	Detect Capital Leetcode Solution	3007
692	Minimum Swaps to Group All 1’s Together Leetcode Solution	3004
693	Difference Array \| Range update query in O(1)	2993
694	Split Array Into Consecutive Subsequences	2993
695	Partition Equal Subset Sum	2993
696	Binary Tree Right Side View LeetCode Solution	2990
697	Counting Bits	2988
698	Remove duplicates from sorted array	2985
699	Contiguous Array Leetcode	2985
700	Remove Palindromic Subsequences Leetcode Solution	2983
701	Binary Tree to Binary Search Tree Conversion	2980
702	Partition to K Equal Sum Subsets Leetcode Solution	2979
703	Print all subarrays with 0 sum	2975
704	Check if a Linked list of Strings form a Palindrome	2974
705	Topological Sorting	2973
706	Happy Number	2962
707	Length of Longest Fibonacci Subsequence	2961
708	Minimum Sum Path in a Triangle	2954
709	Elements Appear more than N/K times in Array	2953
710	Find pairs with given sum such that elements of pair are in different rows	2945
711	Minimum Swaps to Make Strings Equal Leetcode Solution	2944
712	Concatenation of Array LeetCode Solution	2939
713	Populating Next Right Pointers in Each Node Leetcode Solution	2939
714	Arithmetic Slices II – Subsequence LeetCode Solution	2936
715	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2931
716	Reverse Nodes in K-Group	2927
717	Find All Pairs With a Given Difference	2925
718	String comparison containing wildcards	2924
719	MiniMax Algorithm	2923
720	Inorder Successor of a node in Binary Tree	2918
721	Web Crawler LeetCode Solution	2917
722	An Interesting Method to generate Binary Numbers from 1 to n	2915
723	Queue Reconstruction by Height	2914
724	Increasing Subsequence of Length three with Maximum Product	2890
725	Score of Parenthesis LeetCode Solution	2885
726	Maximum Distance in Array	2883
727	Root to Leaf path with target sum Leetcode Solutions	2882
728	Swap Kth Node from beginning with Kth Node from End	2881
729	Given a binary tree, how do you remove all the half nodes?	2879
730	Longest Increasing Subsequence	2875
731	Finding K closest element	2866
732	Find Duplicate Subtrees	2859
733	Union and Intersection of two Linked Lists	2858
734	Longest Common Prefix Using Binary Search II	2857
735	Iterative Preorder Traversal	2855
736	Climbing stairs	2855
737	Delete Nth node from the end of the given linked list	2854
738	Check if String Follows Order of Characters by a Pattern or not	2849
739	BFS vs DFS for Binary Tree	2839
740	Pancake Sorting	2839
741	Find K Closest Elements LeetCode Solution	2828
742	Construct Binary Tree from given Parent Array representation	2828
743	Maximum Product Subarray II	2825
744	Find the first repeating element in an array of integers	2824
745	Container with Most Water	2822
746	Symmetric Tree	2821
747	Parallel Courses II LeetCode Solution	2816
748	Count Minimum Steps to Get the given Array	2813
749	Deletion in a Binary Tree	2802
750	Find the Difference Leetcode Solution	2798
751	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2796
752	Delete Nodes and Return Forest Leetcode Solution	2786
753	Check if all levels of two Binary Tree are anagrams or not	2786
754	Nested List Weight Sum II LeetCode Solution	2785
755	Rearrange an Array Such that arr[i] is equal to i	2781
756	Level order traversal using two Queues	2780
757	Substring With Concatenation Of All Words	2775
758	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2773
759	Find Maximum of Minimum for Every Window Size in a Given Array	2772
760	Tree Traversal (Preorder, Inorder & Postorder)	2772
761	Sum Root to Leaf Numbers LeetCode Solution	2771
762	Level of Each node in a Tree from source node	2771
763	Kill Process LeetCode Solution	2766
764	Minimum Size Subarray Sum	2762
765	Boundary Traversal of binary tree	2761
766	Super Ugly Number	2761
767	Sort Array by Increasing Frequency Leetcode Solution	2759
768	Count pairs from two linked lists whose sum is equal to a given value	2759
769	Linked List Cycle	2753
770	Minimum Remove to Make Valid Parentheses LeetCode Solution	2750
771	Non-overlapping sum of two sets	2750
772	Iterative Depth First Traversal of Graph	2750
773	Reorder Array Using Given Indexes	2748
774	Check if any two intervals overlap among a given set of intervals	2744
775	K maximum sums of overlapping contiguous sub-arrays	2744
776	Matrix Chain Multiplication	2742
777	New 21 Game	2738
778	Valid Anagrams	2735
779	Flatten Binary Tree to Linked List LeetCode Solution	2734
780	Merging Intervals	2734
781	Remove Duplicates from Sorted List II	2731
782	Maximum size subarray sum equals k	2728
783	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2727
784	Longest Common Prefix Word by Word Matching	2723
785	Reservoir Sampling	2722
786	Merge K Sorted Linked Lists	2715
787	Palindrome Partitioning	2712
788	Range LCM Queries	2711
789	Sorting a K Sorted Array	2700
790	Print a Binary Tree in Vertical Order	2699
791	The Painter’s Partition Problem	2697
792	Balanced Binary Tree	2697
793	Hamming Distance	2696
794	Missing Number	2686
795	Maximum Product Subarray	2676
796	Peak Index in a Mountain Array LeetCode Solution	2675
797	Maximum difference between two elements such as larger element comes after smaller	2672
798	Create Maximum Number	2671
799	Iterative Postorder Traversal Using Two Stacks	2668
800	Valid Triangle Number LeetCode Solution	2663
801	Check if Two Expressions With Brackets are Same	2663
802	Check if a queue can be sorted into another queue using a stack	2659
803	Friends Of Appropriate Ages LeetCode Solution	2658
804	Defanging an IP Address LeetCode Solution	2655
805	Find Maximum Sum Possible Equal Sum of Three Stacks	2655
806	Lowest Common Ancestor	2654
807	Verify Preorder Serialization of a Binary Tree	2651
808	Find Three Element From Different Three Arrays Such That a + b + c = sum	2647
809	Count number of triplets with product equal to given number	2643
810	Sort Elements by Frequency II	2641
811	Minimum insertions to form a palindrome with permutations allowed	2640
812	Find Sum of all unique sub-array sum for a given array	2639
813	Find Element Using Binary Search in Sorted Array	2639
814	Find distance between two nodes of a Binary Tree	2637
815	Unique Binary Search Trees LeetCode Solution	2634
816	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2632
817	Check if a given array can represent Preorder Traversal of Binary Search Tree	2632
818	Valid Triangle Number LeetCode Solution	2631
819	Vertical sum in a given binary tree	2631
820	Find subarray with given sum (Handles Negative Numbers)	2628
821	Newman-Conway Sequence	2626
822	Smallest Range II Leetcode Solution	2622
823	Merging Two Sorted Arrays	2614
824	Check if two nodes are on the same path in a Tree	2608
825	Number Of Longest Increasing Subsequence	2608
826	Find K Length Subarray of Maximum Average	2607
827	Minimum Distance Between BST Nodes Leetcode Solution	2606
828	Largest Submatrix With Rearrangements LeetCode Solution	2605
829	Maximum subsequence sum such that no three are consecutive	2599
830	First Bad Version	2598
831	Segment Tree	2596
832	Third Maximum Number Leetcode Solution	2595
833	Check Completeness of a Binary Tree LeetCode Solution	2594
834	Print all triplets in sorted array that form AP	2594
835	Find Common Characters Leetcode Solution	2587
836	Print All Distinct Elements of a Given Integer Array	2585
837	Maximum number of segments of lengths a, b and c	2583
838	Flatten 2D Vector LeetCode Solution	2581
839	Products of ranges in an array	2580
840	Arrange given numbers to form the biggest number	2580
841	Range Sum Query using Sparse Table	2578
842	Lower Case To Upper Case	2574
843	Largest subarray with equal number of 0s and 1s	2573
844	Find Smallest Range Containing Elements from k Lists	2572
845	Longest Bitonic Subsequence	2570
846	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2563
847	Diagonal Traversal of Binary Tree	2562
848	Closest Leaf in a Binary Tree LeetCode Solution	2560
849	Find Peak Element	2554
850	Stone Game IV LeetCode Solution	2552
851	Employee Importance LeetCode Solution	2552
852	Valid Parenthesis String	2552
853	Trapping Rain Water II LeetCode Solution	2551
854	Array Nesting Leetcode Solution	2550
855	Find Nth Node	2544
856	Maximum Population Year LeetCode Solution	2542
857	Median of Two Sorted Arrays	2541
858	Contiguous Array	2538
859	Print Right View of a Binary Tree	2538
860	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2535
861	Bottom View of a Binary Tree	2530
862	Distinct Subsequences	2528
863	Write a function to get the intersection point of two Linked Lists	2526
864	Longest Palindromic Subsequence	2526
865	Largest divisible pairs subset	2522
866	Largest BST Subtree LeetCode Solution	2519
867	Infix to Postfix	2518
868	Shuffle an Array	2513
869	Path Sum	2503
870	Four Elements that Sum to Given	2501
871	Number of siblings of a given Node in n-ary Tree	2500
872	Stone Game IV LeetCode Solution	2494
873	Count and Say	2493
874	Isomorphic Strings	2493
875	Subset Sum Problem in O(sum) space	2491
876	Binary array after M range toggle operations	2489
877	Find the largest multiple of 3	2486
878	Permutations of a Given String Using STL	2485
879	Merge Two Sorted Arrays	2483
880	Unique Binary Search Trees	2480
881	Red-Black Tree Introduction	2476
882	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2471
883	Closest Binary Search Tree Value Leetcode Solution	2470
884	Height of a generic tree from parent array	2469
885	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2461
886	Friends Pairing Problem	2459
887	The Number of Weak Characters in the Game LeetCode Solution	2458
888	Next Greater Element in an Array	2458
889	Maximum Product Subarray	2452
890	Find Largest d in Array such that a + b + c = d	2450
891	Count Primes in Ranges	2445
892	Sentence Screen Fitting LeetCode Solution	2438
893	Valid Perfect Square LeetCode Solution	2437
894	Valid Number	2433
895	Range Minimum Query (Square Root Decomposition and Sparse Table)	2430
896	Encoded String With Shortest Length LeetCode Solution	2424
897	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2424
898	Insert Delete GetRandom	2424
899	Transform a BST to Greater sum Tree	2421
900	Print n terms of Newman-Conway Sequence	2420
901	Averages of Levels in Binary Tree	2419
902	Find unique character in a string	2405
903	Shuffle a given Array	2397
904	Binary Search Tree Delete Operation	2396
905	Maximum Sum of 3 Non-Overlapping Subarrays	2394
906	Edit Distance	2390
907	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2389
908	Binary Tree Longest Consecutive Sequence LeetCode Solution	2384
909	Convert BST into a Min-Heap without using array	2384
910	Minimum sum of squares of character counts in a given string after removing k characters	2379
911	Integer to Roman	2378
912	Reorganize String	2371
913	Serialize and Deserialize Binary Tree LeetCode Solution	2370
914	Orderly Queue LeetCode Solution	2370
915	Maximum Product Subarray	2366
916	Range Queries for Longest Correct Bracket Subsequence	2365
917	Next greater element	2357
918	Find Minimum In Rotated Sorted Array	2356
919	Serialize and Deserialize Binary Tree	2354
920	Kth Smallest Number in Multiplication Table Leetcode Solution	2351
921	Koko Eating Bananas LeetCode Solution	2346
922	Lowest Common Ancestor in Binary Search Tree	2346
923	Find the smallest binary digit multiple of given number	2344
924	K’th Largest element in BST using constant extra space	2344
925	Next Greater Element II LeetCode Solution	2341
926	Array Queries for multiply replacements and product	2341
927	Bold Words in String LeetCode Solution	2339
928	Swap Nodes In Pairs	2335
929	Diameter of N-Ary Tree LeetCode Solution	2322
930	Maximum Sum Increasing Subsequence	2321
931	K’th Largest Element in BST when modification to BST is not allowed	2313
932	Moving Stones Until Consecutive Leetcode Solution	2310
933	Constant time range add operation on an array	2304
934	Advantages of BST over Hash Table	2304
935	Insert into a Sorted Circular Linked List LeetCode Solution	2303
936	Write Code to Determine if Two Trees are Identical	2300
937	Design Underground System Leetcode Solution	2294
938	Valid Tic-Tac-Toe State LeetCode Solution	2285
939	Best Meeting Point LeetCode Solution	2281
940	Queries on XOR of greatest odd divisor of the range	2267
941	Reverse a Path in BST using Queue	2266
942	Check if an Array is Stack Sortable	2266
943	Longest Increasing Consecutive Subsequence	2263
944	Power of Two	2261
945	Number of elements less than or equal to a given number in a given subarray	2255
946	Numbers with prime frequencies greater than or equal to k	2253
947	Total Hamming Distance LeetCode Solution	2251
948	Check if X can give change to every person in the Queue	2244
949	Check if each internal node of a BST has exactly one child	2244
950	Number of Orders in the Backlog Leetcode Solution	2242
951	Form minimum number from given sequence	2240
952	Find the node with minimum value in a Binary Search Tree	2239
953	Greatest Sum Divisible by Three LeetCode Solution	2238
954	Clone a Binary Tree with Random Pointers	2238
955	Level Order Traversal of Binary Tree	2238
956	Image Overlap LeetCode Solution	2236
957	Maximum Array from Two given Arrays Keeping Order Same	2233
958	A program to check if a binary tree is BST or not	2231
959	Count the Pairs at Same Distance as in English Alphabets	2231
960	Find minimum number of merge operations to make an array palindrome	2229
961	Design Add and Search Words Data Structure LeetCode Solution	2228
962	Graph Cloning	2223
963	Merge Sort	2217
964	Count and Toggle Queries on a Binary Array	2212
965	Factorial Trailing Zeroes LeetCode Solution	2211
966	Collect maximum points in a grid using two traversals	2208
967	Closest Binary Search Tree Value II LeetCode Solution	2204
968	Form Minimum Number From Given Sequence	2202
969	Largest Plus Sign Leetcode Solution	2196
970	Check for Palindrome after every character replacement Query	2195
971	Merge two BSTs with limited extra space	2195
972	Print Next Greater Number of Q queries	2191
973	Group Shifted Strings Leetcode Solution	2187
974	Dividing Array into Pairs With Sum Divisible by K	2186
975	Merge Sorted Array	2186
976	Queries for Decimal Values of Subarrays of a Binary Array	2185
977	Print all Possible Ways to Break a String in Bracket Form	2184
978	Maximum difference between first and last indexes of an element in array	2183
979	Print Ancestors of a Given Binary Tree Node Without Recursion	2163
980	Priority Queue	2157
981	Excel Sheet Column Number LeetCode Solution	2153
982	Print modified array after multiple array range increment operations	2147
983	Count even length binary sequences with same sum of first and second half bits	2143
984	Longest Substring Without Repeating Characters Leetcode Solution	2139
985	Binary Search Tree	2135
986	Palindrome Partitioning	2131
987	Guess The Word	2131
988	Swim in Rising Water LeetCode Solution	2129
989	Minimum Moves to Equal Array Elements LeetCode Solution	2125
990	Cutting a Rod	2119
991	Find postorder traversal of BST from preorder traversal	2112
992	Kth Smallest Element in a BST	2107
993	Excel Sheet Column Title LeetCode Solution	2101
994	Unique Paths II	2094
995	Count Pairs Whose Products Exist in Array	2091
996	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	2079
997	Find maximum average subarray of k length	2077
998	How to print maximum number of A’s using given four keys	2076
999	Regular Expression Matching	2074
1000	Binary Search Tree Search and Insertion	2073
1001	Longest Common Prefix using Character by Character Matching	2058
1002	Check given array of size n can represent BST of n levels or not	2056
1003	Sum of Left Leaves LeetCode Solution	2053
1004	K Empty Slots	2047
1005	Sorted Array to Balanced BST	2026
1006	Queries for Number of Distinct Elements in a Subarray	2017
1007	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	2015
1008	Decrease Elements To Make Array Zigzag LeetCode Solution	2002
1009	Maximum Depth Of Binary Tree	2002
1010	Iterative method to find ancestors of a given binary tree	1991
1011	Find the Town Judge LeetCode Solution	1978
1012	Construct Complete Binary Tree from its Linked List Representation	1976
1013	Shortest Unsorted Continuous Subarray LeetCode Solution	1967
1014	Find Maximum Depth of Nested Parenthesis in a String	1964
1015	Binary Tree to Binary Search Tree Conversion using STL set	1948
1016	Maximum weight transformation of a given string	1946
1017	Symmetric Tree LeetCode Solution Leetcode Solution	1928
1018	Data Structure Designing	1914
1019	Random Pick Index LeetCode Solution	1913
1020	Search in Sorted Rotated Array	1900
1021	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1873
1022	Search an Element in Sorted Rotated Array	1857
1023	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1856
1024	Next Greater Element I Leetcode Solution	1854
1025	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1839
1026	Print Maximum Length Chain of Pairs	1837
1027	Flatten Binary Tree to Linked List LeetCode Solution	1814
1028	Maximum Binary Tree	1796
1029	Find k-th smallest element in BST (Order Statistics in BST)	1759
1030	Peeking Iterator LeetCode Solution	1753
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1706