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	43838
2	Maximum occurring character in a string	19904
3	Plus One Leetcode Solution	19615
4	Valid Parentheses LeetCode Solution	19404
5	3Sum Leetcode Solution	17703
6	Merge Sorted Arrays Leetcode Solution	15543
7	First Repeating Element	15368
8	Single Number Leetcode Solution	15059
9	Count Primes Leetcode Solutions	14853
10	Pow(x, n) Leetcode Solution	14760
11	Sqrt(x) Leetcode Solution	14552
12	Meeting Rooms II LeetCode Solution	13573
13	Concatenation of Array LeetCode Solution	13037
14	Roman to Integer Leetcode Solution	12167
15	Valid Palindrome Leetcode Solution	12002
16	Search Insert Position Leetcode Solution	11918
17	Contains Duplicate II Leetcode Solution	11904
18	Palindrome Number LeetCode Solution	11750
19	Remove Duplicates from Sorted Array Leetcode Solution	11599
20	Jump Game Leetcode Solution	11333
21	Reverse Vowels of a String Leetcode Solution	11290
22	Longest Substring Without Repeating Characters LeetCode Solution	11270
23	Number of Good Pairs Leetcode Solution	11268
24	Intersection of Two Arrays II Leetcode Solution	11228
25	Spiral Matrix LeetCode Solution	10995
26	House Robber Leetcode Solution	10933
27	Kids With the Greatest Number of Candies Leetcode Solution	10909
28	Add Binary Leetcode Solution	10790
29	Maximum Subarray Leetcode Solution	10456
30	Number Of 1 bits	10381
31	Find the Maximum Repeating Number in Array	10174
32	Text Justification LeetCode Solution	10089
33	Move Zeroes LeetCode Solution	9969
34	Jewels and Stones Leetcode Solution	9941
35	Min Stack Leetcode Solution	9927
36	Power of Two Leetcode Solution	9690
37	Longest Palindromic Substring LeetCode Solution	9678
38	Permutations Leetcode Solution	9647
39	Shuffle String Leetcode Solution	9639
40	Word Search Leetcode Solution	9549
41	Third Maximum Number Leetcode Solution	9484
42	Daily Temperatures Leetcode Solution	9475
43	Evaluation of Postfix Expression	9452
44	Find All Numbers Disappeared in an Array Leetcode Solution	9435
45	Median of Two Sorted Arrays LeetCode Solution	9408
46	Next Permutation Leetcode Solution	9337
47	Search in Rotated Sorted Array Leetcode Solution	9325
48	Number of Islands LeetCode Solution	9213
49	Kth Missing Positive Number Leetcode Solution	9199
50	Maximum Profit in Job Scheduling Leetcode Solution	9192
51	Next Greater Element I Leetcode Solution	9118
52	Longest Common Prefix Leetcode Solution	9069
53	Frog Jump Leetcode Solution	8919
54	Valid Anagram Leetcode Solution	8867
55	Running Sum of 1d Array Leetcode Solution	8784
56	Find Minimum Distance Between Two Numbers in an Array	8770
57	Shuffle the Array Leetcode Solution	8753
58	Rotate Image LeetCode Solution	8695
59	Combination Sum Leetcode Solution	8655
60	Multiply Strings Leetcode Solution	8652
61	Can Place Flowers LeetCode Solution	8645
62	House Robber II Leetcode Solution	8582
63	Count and Say Leetcode Solution	8565
64	3Sum Closest LeetCode Solution	8496
65	Bulb Switcher LeetCode Solution	8448
66	Boolean Parenthesization Problem	8427
67	Koko Eating Bananas Leetcode Solution	8360
68	Best Time to Buy and Sell Stock LeetCode Solution	8335
69	Subarray and Subsequence	8269
70	Excel Sheet Column Title Leetcode Solution	8259
71	Happy Number Leetcode Solution	8248
72	Isomorphic Strings Leetcode Solution	8203
73	Majority Element Leetcode Solution	8181
74	Candy LeetCode Solution	8168
75	Missing Number Leetcode Solution	8141
76	Count Pairs With Given Sum	8115
77	Integer to Roman Leetcode Solution	8112
78	Product of array except self	8018
79	A Product Array Puzzle	8012
80	Rotate String LeetCode Solution	7986
81	Strobogrammatic Number LeetCode Solution	7955
82	Binary Search LeetCode Solution	7894
83	Reverse String Without Temporary Variable	7857
84	Is Subsequence Leetcode Solution	7844
85	Find the Difference Leetcode Solution	7818
86	Find the Duplicate Number LeetCode Solution	7806
87	Expression Evaluation	7795
88	Largest Number Leetcode Solution	7786
89	Find Common Characters Leetcode Solution	7767
90	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7643
91	String to Integer (atoi) LeetCode Solution	7616
92	Subset Leetcode	7607
93	Rabin Karp Algorithm	7573
94	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7566
95	Summary Ranges Leetcode Solution	7502
96	Set Matrix Zeroes	7482
97	Balanced Binary Tree Leetcode Solution	7439
98	Word Pattern LeetCode Solution	7405
99	Sort Characters By Frequency LeetCode Solution	7387
100	Find the Town Judge Leetcode Solution	7383
101	Find the Winner of the Circular Game LeetCode Solution	7346
102	Unique Paths Leetcode Solution	7329
103	Arranging Coins Leetcode Solution	7322
104	Rearrange Positive and Negative Numbers Alternatively in Array	7281
105	Group Anagrams LeetCode Solution	7246
106	Postfix to Infix Conversion	7243
107	String Compression LeetCode Solution	7173
108	Asteroid Collision LeetCode Solution	7141
109	Page Replacement Algorithms in Operating Systems	7101
110	Repeated Substring Pattern LeetCode Solution	7063
111	Smallest window in a string containing all characters of another string	7038
112	Best Time to Buy and Sell Stock II Leetcode Solution	6986
113	Matrix Chain Multiplication using Dynamic Programming	6985
114	Sort Colors LeetCode Solution	6984
115	Sum of minimum and maximum elements of all subarrays of size k	6849
116	Sort Array By Parity LeetCode Solution	6846
117	Zigzag Conversion LeetCode Solution	6827
118	Kth largest element in an Array Leetcode Solutions	6812
119	Valid Palindrome II Leetcode Solution	6803
120	Generate Parentheses Leetcode Solution	6765
121	Divide Two Integers Leetcode Solution	6764
122	Find the Row with Maximum Number of 1’s	6727
123	Assign Cookies Leetcode Solution	6725
124	Decode String Leetcode Solution	6711
125	Pascal Triangle Leetcode	6710
126	Product of Array Except Self LeetCode Solution	6647
127	Reverse Integer Leetcode Solution	6635
128	Remove Duplicates from Sorted Array II Leetcode Solution	6630
129	H-Index Leetcode Solution	6621
130	Length of Last Word Leetcode Solution	6613
131	Bus Routes Leetcode Solution	6563
132	Number of Provinces Leetcode Solution	6535
133	Merge Two Sorted Lists Leetcode Solutions	6518
134	Prefix to Infix Conversion	6515
135	Linked List Cycle II LeetCode Solution	6471
136	Convert array into Zig-Zag fashion	6445
137	Minimum Steps to reach target by a Knight	6445
138	Minimum Cost For Tickets Leetcode Solution	6426
139	Employee Free Time LeetCode Solution	6418
140	Optimal Account Balancing LeetCode Solution	6415
141	Defanging an IP Address Leetcode Solution	6404
142	Pascal’s Triangle II Leetcode Solution	6358
143	Find First and Last Position of Element in Sorted Array Leetcode Solution	6329
144	Island Perimeter Leetcode Solution	6284
145	Bellman Ford Algorithm	6279
146	Implementation of Deque using Doubly Linked List	6273
147	OSI Model	6238
148	First element occurring k times in an array	6237
149	Increasing Triplet Subsequence LeetCode Solution	6228
150	Merge Sorted Array LeetCode Solution	6227
151	Majority Element II Leetcode Solution	6203
152	Build Array From Permutation Leetcode Solution	6197
153	KMP Algorithm	6183
154	Robot Room Cleaner Leetcode Solution	6175
155	Max Consecutive Ones Leetcode Solution	6140
156	Guess Number Higher or Lower LeetCode Solution	6134
157	Find Pair with Given Difference	6108
158	Check if the Elements of an Array are Consecutive	6106
159	K-th Smallest Element in a Sorted Matrix	6085
160	Swap Nodes in Pairs Leetcode Solutions	6076
161	Add Two Numbers II Leetcode Solution	6054
162	Set Matrix Zeroes Leetcode Solution	6051
163	Find the Missing Number	6047
164	Lemonade Change Leetcode Solution	6029
165	First negative integer in every window of size k	5982
166	Trapping Rain Water Leetcode Solution	5979
167	Design Parking System Leetcode Solution	5974
168	Fibonacci Number LeetCode Solution	5966
169	Subarray Sum Equals K LeetCode Solution	5945
170	Delete middle element of a stack	5930
171	First Unique Character in a String LeetCode Solution	5897
172	Word Ladder LeetCode Solution	5893
173	Last Stone Weight	5889
174	Coin Change 2 Leetcode Solution	5880
175	Subarray with Given Sum	5869
176	Length of the largest subarray with contiguous elements	5862
177	Monotonic Array LeetCode Solution	5860
178	Capacity To Ship Packages Within D Days Leetcode Solution	5851
179	String Compression	5850
180	Find All Duplicates in an Array LeetCode Solution	5847
181	Subarray Product Less Than K LeetCode Solution	5832
182	Form Minimum Number from Given Sequence of D’s and I’s	5823
183	Repeated Substring Pattern	5816
184	Palindrome Linked List Leetcode Solution	5801
185	Single Element in a Sorted Array LeetCode Solution	5794
186	Find Smallest Missing Number in a Sorted Array	5761
187	Leetcode Permutations	5710
188	Continuous Subarray Sum LeetCode Solution	5695
189	Remove Duplicates from Sorted List II LeetCode Solution	5677
190	01 Matrix LeetCode Solution	5677
191	Prefix to Postfix Conversion	5664
192	Combinations Leetcode Solution	5663
193	Combination Sum	5623
194	Reverse Words in a String III LeetCode Solution	5601
195	Break a Palindrome LeetCode Solution	5598
196	Iterative Implementation of Quick Sort	5589
197	Valid Perfect Square Leetcode Solution	5587
198	Remove Linked List Elements Leetcode Solution	5582
199	Same Tree LeetCode Solution	5577
200	Insert Delete GetRandom O(1) Leetcode Solution	5541
201	Merge k Sorted Lists Leetcode Solution	5526
202	Rotate List Leetcode Solution	5520
203	Contains Duplicate LeetCode Solution	5514
204	Container With Most Water LeetCode Solution	5511
205	Relative Ranks Leetcode Solution	5509
206	Top K Frequent Elements LeetCode Solution	5504
207	Slowest Key Leetcode Solution	5498
208	Backspace String Compare	5472
209	Find Peak Element LeetCode Solution	5454
210	Cuckoo sequence program	5449
211	Maximum Product of Three Numbers LeetCode Solution	5434
212	Palindrome Number	5380
213	Subarray Sum Equals k	5379
214	Find the Duplicate Element	5369
215	Printing brackets in Matrix Chain Multiplication Problem	5359
216	Kth Largest Element in a Stream Leetcode Solution	5346
217	The K Weakest Rows in a Matrix Leetcode Solution	5346
218	Longest Common Subsequence LeetCode Solution	5327
219	Max Area of Island	5293
220	Second Most Repeated Word in a Sequence	5283
221	Find Leaders in an Array	5279
222	Remove All Occurrences of a Substring LeetCode Solution	5269
223	Rearrange given Array in Maximum Minimum Form	5255
224	Generate all Binary Strings Without Consecutive 1’s	5252
225	Relative Sort Array Leetcode Solution	5249
226	Scramble String	5245
227	Unique Paths II Leetcode Solution	5238
228	Check If Two String Arrays are Equivalent Leetcode Solution	5237
229	Permutation in String Leetcode Solution	5225
230	Convert a Number to Hexadecimal Leetcode Solution	5221
231	Arithmetic Expression Evaluation	5217
232	Target Sum	5215
233	Make The String Great Leetcode Solution	5211
234	Find Triplet in Array With a Given Sum	5193
235	Delete Node in a Linked List Leetcode Solution	5188
236	Letter Combinations of a Phone Number	5174
237	Count Good Nodes in Binary Tree Leetcode Solution	5160
238	N-Queens LeetCode Solution	5156
239	Time Based Key-Value Store LeetCode Solution	5151
240	Moving Average from Data Stream Leetcode Solution	5143
241	Construct Binary Tree from Given Inorder and Preorder Traversals	5138
242	Stone Game LeetCode	5132
243	Next Permutation	5105
244	LRU Cache LeetCode Solution	5093
245	Prim’s Algorithm	5090
246	Minimum Operations to convert X to Y	5080
247	Number of Dice Rolls With Target Sum LeetCode Solution	5077
248	Find N Unique Integers Sum up to Zero Leetcode Solution	5075
249	Check If N and Its Double Exist Leetcode Solution	5053
250	Remove Minimum Characters so that Two Strings Become Anagrams	5024
251	Min Stack	5022
252	Number of Steps to Reduce a Number to Zero Leetcode Solution	5016
253	Given two unsorted arrays find all pairs whose sum is x	5016
254	Flipping an Image LeetCode Solution	4976
255	Find The Duplicate Number	4961
256	Top K Frequent Elements	4948
257	Minimum Knight Moves LeetCode Solution	4947
258	Minimum swaps required to bring all elements less than or equal to k together	4946
259	Stock Buy Sell to Maximize Profit	4938
260	Min Cost Climbing Stairs LeetCode Solution	4927
261	Reverse Only Letters LeetCode Solution	4914
262	Student Attendance Record I Leetcode Solution	4910
263	Smallest Positive Number Missing in an Unsorted Array	4900
264	To Lower Case Leetcode Solution	4875
265	Maximum Sum Increasing Subsequence	4870
266	Single Number	4860
267	License Key Formatting Leetcode Solution	4859
268	The kth Factor of n Leetcode Solution	4838
269	Reverse words in a string	4834
270	Maximum Subarray Sum using Divide and Conquer	4829
271	Maximum Population Year LeetCode Solution	4776
272	Top K Frequent Words LeetCode Solution	4742
273	Longest Common Subsequence	4737
274	Sudoku Solver	4733
275	Find the Number Occurring Odd Number of Times in an Array	4719
276	BFS for Disconnected Graph	4708
277	Remove Nth Node From End of List Leetcode Solution	4698
278	Find Words That Can Be Formed by Characters Leetcode Solution	4693
279	Search Suggestions System LeetCode Solution	4691
280	Minimum Path Sum Leetcode Solution	4688
281	Reformat Date LeetCode Solution	4685
282	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4683
283	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4657
284	Reveal Cards In Increasing Order Leetcode Solution	4643
285	Maximum Depth of Binary Tree Leetcode Solution	4635
286	Sum of Subarray Ranges Leetcode Solution	4629
287	Intersection of Two Arrays	4624
288	Maximum Size Subarray Sum Equals k Leetcode Solution	4617
289	Sort Elements by Frequency of Occurrences	4614
290	Best Time to Buy and Sell Stock III Leetcode Solution	4603
291	Reverse Nodes in k-Group LeetCode Solution	4601
292	N-th Tribonacci Number Leetcode Solution	4598
293	House Robber	4592
294	Find any one of the multiple repeating elements in read only array	4580
295	Remove All Ones With Row and Column Flips Leetcode Solution	4571
296	Diagonal Traverse LeetCode Solution	4569
297	Evaluate Division	4564
298	Maximize Distance to Closest Person LeetCode Solution	4561
299	Most Frequent Element in an Array	4554
300	Range Sum Query 2D – Immutable Leetcode Solution	4539
301	Binary Tree Inorder Traversal LeetCode Solution	4535
302	Design A Leaderboard Leetcode Solution	4535
303	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4535
304	Reverse individual words	4535
305	Minimum Characters to be Added at Front to Make String Palindrome	4529
306	Length of Longest valid Substring	4529
307	Count of index pairs with equal elements in an array	4523
308	Find if Path Exists in Graph Leetcode Solution	4516
309	Last Stone Weight II LeetCode Solution	4502
310	Count Number of Occurrences in a Sorted Array	4497
311	Minimum number of Merge Operations to make an Array Palindrome	4480
312	Remove Duplicates from Sorted List LeetCode Solution	4479
313	Split Linked List in Parts Leetcode Solution	4469
314	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4464
315	Implement a stack using single queue	4463
316	Dijkstra Algorithm	4446
317	Find the Closest Palindrome number	4435
318	Brightest Position on Street LeetCode Solution	4432
319	Mobile Numeric Keypad Problem	4395
320	Find Leaves of Binary Tree LeetCode Solution	4391
321	Arrange given Numbers to Form the Biggest Number II	4390
322	Reverse Bits	4384
323	Special Positions in a Binary Matrix Leetcode Solution	4369
324	Round Robin Scheduling	4365
325	Spiral Matrix II Leetcode Solution	4363
326	Symmetric Tree Leetcode Solution	4355
327	Invalid Transactions LeetCode Solution	4348
328	Shortest Word Distance Leetcode Solution	4338
329	Maximum Subarray	4333
330	Paint House LeetCode Solution	4328
331	Recursion	4314
332	Maximal Square	4293
333	Sort Array By Parity II Leetcode Solution	4285
334	One Edit Distance LeetCode Solution	4283
335	Hamming Distance Leetcode Solution	4278
336	Diagonal Traversal LeetCode Solution	4276
337	Rank Transform of an Array Leetcode Solution	4273
338	Find Duplicates in an Array in Most Efficient Way	4273
339	Partition Labels LeetCode Solution	4257
340	Find Winner on a Tic Tac Toe Game Leetcode Solution	4250
341	Remove Invalid Parentheses Leetcode Solution	4243
342	Minimum Moves to Equal Array Elements Leetcode Solution	4242
343	Jump Game	4239
344	Tug of War	4238
345	Largest Rectangle in Histogram LeetCode Solution	4232
346	Alien Dictionary LeetCode Solution	4232
347	Count of Triplets With Sum Less than Given Value	4231
348	String Matching in an Array Leetcode Solution	4230
349	Unique Paths	4229
350	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4222
351	Minimum Time to Collect All Apples in a Tree LeetCode Solution	4200
352	Postfix to Prefix Conversion	4199
353	The Celebrity Problem	4182
354	Unique Paths III LeetCode Solution	4181
355	Next Permutation LeetCode Solution	4178
356	Validate Stack Sequences LeetCode Solution	4172
357	Given an Array of Pairs Find all Symmetric Pairs in it	4171
358	Merge Two Sorted Linked Lists	4166
359	Bitwise AND of Numbers Range LeetCode Solution	4164
360	Lowest Common Ancestor of a Binary Tree Leetcode Solution	4157
361	Construct BST from its given Level Order Traversal	4152
362	Minimum Depth of Binary Tree Leetcode Solution	4151
363	Transpose Graph	4147
364	Range Sum of BST LeetCode Solution	4143
365	Least Number of Unique Integers after K Removals Leetcode Solution	4143
366	Minimum operation to make all elements equal in array	4138
367	Smallest Subarray with k Distinct Numbers	4137
368	Invert Binary Tree LeetCode Solution	4129
369	Minimum Time Visiting All Points Leetcode Solution	4128
370	Maximum Circular Subarray Sum	4126
371	Toeplitz Matrix	4118
372	Longest Common Prefix using Trie	4117
373	Clone Graph LeetCode Solution	4113
374	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	4112
375	Pair of Positive Negative Values in an Array	4106
376	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	4092
377	Find minimum difference between any two elements	4090
378	Next Greater Element III LeetCode Solution	4080
379	Ugly Number II LeetCode Solution	4079
380	Kruskal Algorithm	4079
381	Check whether Strings are K Distance Apart or Not	4079
382	Robot Bounded In Circle LeetCode Solution	4078
383	4Sum	4074
384	3 Sum	4072
385	K Empty Slots LeetCode	4072
386	Find the First and Second Smallest Elements	4062
387	Longest Substring with At Most K Distinct Characters LeetCode Solution	4061
388	Check if a given array contains duplicate elements within k distance from each other	4046
389	Minimum Cost to Hire K Workers	4045
390	Substring with Concatenation of All Words Leetcode Solution	4039
391	Max stack	4036
392	LRU Cache Implementation	4029
393	Implementation of Deque using circular array	4023
394	Longest subarray not having more than K distinct elements	4020
395	Graph Valid Tree LeetCode Solution	4017
396	Word Search	4014
397	Sort a stack using a temporary stack	4004
398	Sliding Window Technique	3996
399	Invert Binary Tree LeetCode Solution	3995
400	Regular Expression Matching Regular Expression Matching LeetCode Solution	3995
401	Minimize Maximum Pair Sum in Array LeetCode Solution	3995
402	Stack Permutations (Check if an array is stack permutation of other)	3983
403	Stone Game II Leetcode	3981
404	Find the Smallest Divisor given a Threshold Leetcode Solution	3977
405	Permutation Sequence LeetCode Solution	3975
406	Longest subsequence such that difference between adjacents is one	3975
407	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3971
408	Non-decreasing Array LeetCode Solution	3965
409	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3961
410	Number Complement Leetcode Solution	3960
411	Find duplicates in a given array when elements are not limited to a range	3960
412	Find the subarray with least average	3959
413	Design Browser History LeetCode Solution	3957
414	Priority Queue using doubly linked list	3955
415	Top View of Binary Tree	3954
416	Kth Smallest Element in a BST Leetcode Solution	3952
417	Minesweeper LeetCode Solution	3944
418	Missing Element in Sorted Array LeetCode Solution	3940
419	Queries for counts of array elements with values in given range	3935
420	Number of Islands II LeetCode Solution	3932
421	LRU Cache Leetcode Solution	3928
422	Painting Fence Algorithm	3928
423	K Closest Points to Origin Leetcode Solution	3923
424	Maximum Number of Occurrences of a Substring Leetcode Solution	3922
425	Common elements in all rows of a given matrix	3916
426	Nth Catalan Number	3913
427	Partition List Leetcode Solution	3911
428	Find the Peak Element from an Array	3896
429	Path With Maximum Minimum Value LeetCode Solution	3891
430	Fibonacci Number LeetCode Solution	3890
431	First Circular Tour to Visit all the Petrol Bunks	3888
432	Snakes and Ladders LeetCode Solution	3887
433	Maximum Consecutive Numbers Present in an Array	3878
434	Can Make Arithmetic Progression From Sequence Leetcode Solution	3878
435	Find Top K (or Most Frequent) Numbers in a Stream	3877
436	Number of Smaller Elements on Right Side	3873
437	Sequences of given length where every element is more than or equal to twice of previous	3867
438	Sliding Window Maximum LeetCode Solution	3864
439	Sort elements by frequency	3862
440	Combination Sum IV LeetCode Solution	3859
441	Find Maximum Level sum in Binary Tree	3857
442	Integer Break LeetCode Solution	3847
443	Tiling Problem	3846
444	Gold Mine Problem	3845
445	High Five LeetCode Solution	3842
446	Flood Fill LeetCode	3841
447	Insert Interval Leetcode Solution	3838
448	Odd Even Linked List Leetcode Solution	3835
449	Search a 2D Matrix II Leetcode Solution	3833
450	Check if Two given Strings are Isomorphic to each other	3829
451	Count items common to both the lists but with different prices	3827
452	Find Minimum in Rotated Sorted Array II LeetCode Solution	3824
453	Move All the Zeros to the End of the Given Array	3822
454	N queen problem	3817
455	Rearrange array such that even positioned are greater than odd	3814
456	Distance of nearest cell having 1 in a binary matrix	3812
457	Shortest Palindrome	3806
458	Longest Palindrome can be Formed by Removing or Rearranging Characters	3803
459	Interval Tree	3789
460	Insert into a Binary Search Tree Leetcode Solution	3783
461	Consecutive Characters LeetCode Solution	3781
462	Replace Elements with Greatest Element on Right Side Leetcode Solution	3780
463	Search in a Binary Search Tree Leetcode Solution	3777
464	Trapping Rain Water LeetCode Solution	3765
465	Number of Closed Islands Leetcode Solution	3764
466	Sort Colors	3763
467	Kth Non-repeating Character	3757
468	Design a stack that supports getMin() in O(1) time and O(1) extra space	3756
469	Fibonacci numbers	3751
470	Find a Peak Element II LeetCode Solution	3741
471	Integer to English words	3741
472	Longest Common Prefix using Sorting	3739
473	Reverse a linked list	3738
474	Spiral Matrix III LeetCode Solution	3734
475	Find All Possible Recipes from Given Supplies LeetCode Solution	3733
476	Minimum Absolute Difference in BST Leetcode Solution	3732
477	Evaluate Reverse Polish Notation LeetCode Solution	3725
478	Decompress Run-Length Encoded List Leetcode Solution	3723
479	Expression Contains Redundant Bracket or Not	3723
480	Queries for GCD of all numbers of an array except elements in a given range	3720
481	Sliding Window Median Leetcode Solution	3714
482	Check If Array Pairs Are Divisible by k LeetCode Solution	3713
483	Vertical Order Traversal of Binary Tree LeetCode Solution	3705
484	Convert Sorted Array to Binary Search Tree Leetcode Solution	3700
485	Find Pythagorean Triplets from Array	3699
486	Restore IP Addresses Leetcode Solution	3697
487	Coin Change Problem	3697
488	Sorting array using Stacks	3692
489	Binary Tree Maximum Path Sum LeetCode Solution	3691
490	Minimum Path Sum	3689
491	Palindrome Substring Queries	3683
492	Sort an array according to the order defined by another array	3665
493	Balanced Expression with Replacement	3665
494	Morris Traversal	3662
495	Majority Element	3662
496	Multiplication of Two Matrices	3661
497	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3648
498	Priority Queue in C++	3648
499	Subset sum problem	3639
500	Camelcase Matching Leetcode Solution	3636
501	Best Time to Buy and Sell Stock	3635
502	Find the first Repeating Number in a Given Array	3628
503	Number of Days Between Two Dates LeetCode Solution	3620
504	Find Median from Data Stream LeetCode Solution	3618
505	Queue using Stacks	3617
506	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3614
507	Cells with Odd Values in a Matrix LeetCode Solution	3610
508	Path Crossing Leetcode Solution	3599
509	How to Implement Stack Using Priority Queue or Heap?	3597
510	Generate all Binary Strings from Given Pattern	3592
511	Design Hit Counter LeetCode Solution	3588
512	The Stock Span Problem	3585
513	Count subarrays having total distinct elements same as original array	3575
514	Is Graph Bipartite? LeetCode Solution	3574
515	Sieve of Eratosthenes	3574
516	Kth ancestor of a node in binary tree	3573
517	Detect a loop in the Linked List	3572
518	Path Sum II LeetCode Solution	3570
519	Analyze User Website Visit Pattern LeetCode Solution	3565
520	Intersection of Two Linked Lists LeetCode Solution	3564
521	Longest Increasing Path in a Matrix LeetCode Solution	3560
522	Pancake Sorting Problem	3559
523	Shortest Completing Word Leetcode Solution	3558
524	Find a Fixed Point in a Given Array	3557
525	Divide Chocolate LeetCode Solution	3554
526	Letter Case Permutation	3545
527	Count Submatrices With All Ones LeetCode Solution	3542
528	Largest rectangular sub-matrix whose sum is 0	3539
529	Monotonic Array Leetcode Solution	3538
530	Check if Array Contains Contiguous Integers With Duplicates Allowed	3531
531	Custom Sort String Leetcode Solution	3528
532	Construction of Longest Increasing Subsequence (N log N)	3524
533	Group Anagrams	3521
534	Implement strStr() LeetCode Solution	3517
535	Minimum Height Trees	3515
536	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3511
537	Different Ways to Add Parentheses Leetcode Solution	3506
538	Decode Ways	3506
539	Maximum Element in an Array which is Increasing and then Decreasing	3506
540	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3501
541	Valid Boomerang Leetcode Solution	3498
542	Merge Overlapping Intervals	3493
543	Find maximum length Snake sequence	3487
544	Queue based approach for first non-repeating character in a stream	3485
545	Nearest Exit from Entrance in Maze LeetCode Solution	3475
546	Scramble String LeetCode Solution	3470
547	How to Create Mergable Stack?	3468
548	Perfect Squares LeetCode Solution	3465
549	Shifting Letters LeetCode Solution	3461
550	Number of Distinct Islands Leetcode Solution	3461
551	Best Time to Buy and Sell Stock IV LeetCode Solution	3459
552	Find the Lost Element From a Duplicated Array	3458
553	Decode String	3457
554	Implement Trie (Prefix Tree) Leetcode Solution	3454
555	LCS (Longest Common Subsequence) of three strings	3446
556	First missing positive	3438
557	Guess Number Higher or Lower II	3437
558	Longest Common Prefix using Divide and Conquer	3437
559	Reorder Data in Log Files LeetCode Solution	3435
560	Design Skiplist LeetCode Solution	3434
561	Number of Equivalent Domino Pairs Leetcode Solution	3433
562	Sliding Window Maximum	3432
563	Most Stones Removed with Same Row or Column LeetCode Solution	3429
564	Sort a stack using recursion	3429
565	Maximum Sum of Non Consecutive Elements	3429
566	Count Possible Triangles	3421
567	Find if an Expression has Duplicate Parenthesis or Not	3420
568	Race Car LeetCode Solution	3419
569	Champagne Tower LeetCode Solution	3419
570	Build an Array With Stack Operations Leetcode Solution	3415
571	Binary Tree zigzag level order Traversal	3413
572	Recover Binary Search Tree	3413
573	Contiguous Array LeetCode Solution	3404
574	Insert Node in the Sorted Linked List	3404
575	All Possible Full Binary Trees LeetCode Solution	3403
576	Rectangle Overlap LeetCode Solution	3401
577	Largest Subarray with Equal Number of 0’s and 1’s	3400
578	Smallest Good Base	3388
579	Minimum Bracket Reversals	3380
580	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3379
581	Maximum Length of Chain Pairs	3379
582	Palindrome Permutation LeetCode Solution	3365
583	Find the two Numbers with Odd Occurrences in an Unsorted Array	3361
584	Longest Substring with At Least K Repeating Characters LeetCode Solution	3355
585	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3354
586	Maximum Depth of N-ary Tree Leetcode Solution	3351
587	Maximum Number of Ways to Partition an Array LeetCode Solution	3350
588	Minimum Height Trees LeetCode Solution	3349
589	Distance Between Bus Stops Leetcode Solution	3347
590	Longest Repeated Subsequence	3347
591	Rearrange Spaces Between Words Leetcode Solution	3346
592	Find a Sorted Subsequence of size 3	3346
593	Recover Binary Search Tree Leetcode Solution	3341
594	Design a Stack With Increment Operation Leetcode Solution	3337
595	Merge Two Binary Trees LeetCode Solution	3334
596	Find the Town Judge LeetCode Solution	3331
597	Implement Two Stacks in an Array	3330
598	Palindrome Partitioning Leetcode Solution	3327
599	Subarrays with K Different Integers Leetcode Solution	3323
600	Reorder an Array According to the Given Indexes	3321
601	Valid Parentheses Leetcode Solution	3319
602	K-th Distinct Element in an Array	3318
603	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3312
604	Heap Sort	3310
605	Print all Palindromic Partitions of a String	3310
606	Check for Balanced Parentheses in an Expression	3301
607	Huffman Coding	3299
608	Maximum sum rectangle in a 2D matrix	3289
609	Find the First Circular Tour that visits all the Petrol Pumps	3287
610	Minimum number of jumps to reach end	3285
611	Maximum Score After Splitting a String Leetcode Solution	3283
612	Count pair with Given Sum	3277
613	Contains Duplicate	3275
614	The Maze III LeetCode Solution	3272
615	Jump Game IV LeetCode Solution	3269
616	Sort a String According to Another String	3266
617	Maximize Elements Using Another Array	3264
618	Perform String Shifts Leetcode	3264
619	Merge Overlapping Intervals II	3264
620	Mean of Array After Removing Some Elements Leetcode Solution	3263
621	Palindrome Permutation	3243
622	Word Break	3241
623	Find First and Last Position of Element in Sorted Array LeetCode Solution	3240
624	Valid Sudoku	3228
625	Find the Minimum Element in a Sorted and Rotated Array	3227
626	Convert BST to Min Heap	3220
627	Palindrome Permutations of a String	3220
628	Find Largest Value in Each Tree Row LeetCode Solution	3213
629	All Unique Triplets that Sum up to a Given Value	3211
630	Minimum Jumps to Reach Home LeetCode Solution	3209
631	Possible Bipartition LeetCode Solution	3207
632	Iterative Method to find Height of Binary Tree	3206
633	Find all triplets with zero sum	3202
634	A Space Optimized DP solution for 0-1 Knapsack Problem	3202
635	Caesar Cipher	3202
636	Edit Distance LeetCode Solution	3197
637	Count Sub Islands LeetCode Solution	3192
638	Find Median from data Stream	3178
639	Palindromic Substrings Leetcode Solution	3174
640	My Calendar I LeetCode Solution	3167
641	Reach a Number LeetCode Solution	3166
642	Segregate 0s and 1s in an Array	3165
643	Best Meeting Point LeetCode Solution	3155
644	Number of palindromic paths in a matrix	3154
645	Maximum Product of Splitted Binary Tree LeetCode Solution	3153
646	Level order Traversal in Spiral Form	3151
647	Find the Subarray of given length with Least Average	3149
648	Merge Two Balanced Binary Search Trees	3140
649	Pair with given product	3136
650	Count Good Nodes in Binary Tree LeetCode Solution	3134
651	Check if the given array can represent Level Order Traversal of Binary Search Tree	3130
652	Word Pattern	3130
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	3127
654	Breadth First Search (BFS) for a Graph	3123
655	Alien Dictionary	3120
656	Validate Binary Search Tree	3113
657	Partition Problem	3103
658	Brick Wall LeetCode Solution	3102
659	Sorted Linked List to Balanced BST	3096
660	Isomorphic Strings LeetCode Solution	3093
661	Convert Sorted List to Binary Search Tree	3090
662	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	3082
663	Find whether a subarray is in form of a mountain or not	3081
664	Add two numbers	3080
665	Minimum time required to rot all oranges	3078
666	How to Efficiently Implement k Stacks in a Single Array?	3074
667	Construct BST from given Preorder Traversal	3073
668	Swapping Nodes in a Linked List Leetcode Solution	3072
669	Sort 0s 1s and 2s in an Array	3069
670	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	3068
671	Maximize Sum of Array after K Negations Leetcode Solution	3067
672	Largest Sum Contiguous Subarray	3056
673	Longest Subarray Having Count of 1s One More than Count of 0s	3055
674	Queries on Probability of Even or Odd Number in given Ranges	3055
675	Populating Next Right Pointers in Each Node	3054
676	Rotate Array	3054
677	Bubble sort using two Stacks	3053
678	Merge K Sorted Arrays and Print Sorted Output	3052
679	Remove brackets from an algebraic string containing + and – operators	3051
680	Print Fibonacci sequence using 2 variables	3046
681	Find all pairs (a, b) in an array such that a % b = k	3043
682	Range Sum Query 2D – Immutable LeetCode Solution	3034
683	Find four elements that sum to a given value (Hashmap)	3031
684	Count Distinct Elements in Every Window of Size K	3029
685	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	3029
686	Maximum Number of Chocolates to be Distributed Equally Among k Students	3025
687	Count ways to reach the nth stair using step 1, 2 or 3	3022
688	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	3020
689	Maximum Frequency Stack Leetcode Solution	3008
690	Merge Two Sorted Lists Leetcode	3008
691	Detect Capital Leetcode Solution	3000
692	Minimum Swaps to Group All 1’s Together Leetcode Solution	2994
693	Difference Array \| Range update query in O(1)	2985
694	Split Array Into Consecutive Subsequences	2985
695	Partition Equal Subset Sum	2985
696	Binary Tree Right Side View LeetCode Solution	2983
697	Counting Bits	2979
698	Remove Palindromic Subsequences Leetcode Solution	2976
699	Remove duplicates from sorted array	2976
700	Binary Tree to Binary Search Tree Conversion	2974
701	Partition to K Equal Sum Subsets Leetcode Solution	2971
702	Print all subarrays with 0 sum	2968
703	Contiguous Array Leetcode	2967
704	Check if a Linked list of Strings form a Palindrome	2964
705	Happy Number	2956
706	Length of Longest Fibonacci Subsequence	2954
707	Topological Sorting	2954
708	Minimum Sum Path in a Triangle	2949
709	Elements Appear more than N/K times in Array	2948
710	Find pairs with given sum such that elements of pair are in different rows	2939
711	Minimum Swaps to Make Strings Equal Leetcode Solution	2936
712	Concatenation of Array LeetCode Solution	2935
713	Populating Next Right Pointers in Each Node Leetcode Solution	2933
714	Arithmetic Slices II – Subsequence LeetCode Solution	2928
715	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2923
716	Reverse Nodes in K-Group	2917
717	String comparison containing wildcards	2917
718	Find All Pairs With a Given Difference	2916
719	Web Crawler LeetCode Solution	2912
720	Inorder Successor of a node in Binary Tree	2912
721	MiniMax Algorithm	2909
722	Queue Reconstruction by Height	2908
723	An Interesting Method to generate Binary Numbers from 1 to n	2900
724	Increasing Subsequence of Length three with Maximum Product	2878
725	Maximum Distance in Array	2877
726	Score of Parenthesis LeetCode Solution	2875
727	Swap Kth Node from beginning with Kth Node from End	2870
728	Root to Leaf path with target sum Leetcode Solutions	2862
729	Longest Increasing Subsequence	2862
730	Given a binary tree, how do you remove all the half nodes?	2860
731	Finding K closest element	2857
732	Union and Intersection of two Linked Lists	2849
733	Longest Common Prefix Using Binary Search II	2849
734	Find Duplicate Subtrees	2848
735	Climbing stairs	2848
736	Iterative Preorder Traversal	2847
737	Delete Nth node from the end of the given linked list	2846
738	Check if String Follows Order of Characters by a Pattern or not	2844
739	Pancake Sorting	2829
740	BFS vs DFS for Binary Tree	2826
741	Construct Binary Tree from given Parent Array representation	2819
742	Maximum Product Subarray II	2819
743	Find the first repeating element in an array of integers	2818
744	Container with Most Water	2816
745	Find K Closest Elements LeetCode Solution	2814
746	Symmetric Tree	2814
747	Parallel Courses II LeetCode Solution	2807
748	Count Minimum Steps to Get the given Array	2804
749	Deletion in a Binary Tree	2796
750	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2787
751	Find the Difference Leetcode Solution	2783
752	Nested List Weight Sum II LeetCode Solution	2780
753	Check if all levels of two Binary Tree are anagrams or not	2778
754	Delete Nodes and Return Forest Leetcode Solution	2776
755	Rearrange an Array Such that arr[i] is equal to i	2773
756	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2769
757	Level order traversal using two Queues	2769
758	Sum Root to Leaf Numbers LeetCode Solution	2765
759	Find Maximum of Minimum for Every Window Size in a Given Array	2765
760	Level of Each node in a Tree from source node	2765
761	Substring With Concatenation Of All Words	2762
762	Kill Process LeetCode Solution	2759
763	Tree Traversal (Preorder, Inorder & Postorder)	2758
764	Boundary Traversal of binary tree	2757
765	Minimum Size Subarray Sum	2756
766	Sort Array by Increasing Frequency Leetcode Solution	2751
767	Super Ugly Number	2751
768	Count pairs from two linked lists whose sum is equal to a given value	2750
769	Linked List Cycle	2747
770	Iterative Depth First Traversal of Graph	2744
771	Non-overlapping sum of two sets	2743
772	Minimum Remove to Make Valid Parentheses LeetCode Solution	2742
773	K maximum sums of overlapping contiguous sub-arrays	2737
774	Check if any two intervals overlap among a given set of intervals	2734
775	Reorder Array Using Given Indexes	2734
776	Matrix Chain Multiplication	2730
777	New 21 Game	2729
778	Valid Anagrams	2728
779	Remove Duplicates from Sorted List II	2724
780	Flatten Binary Tree to Linked List LeetCode Solution	2720
781	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2719
782	Maximum size subarray sum equals k	2719
783	Longest Common Prefix Word by Word Matching	2719
784	Merging Intervals	2717
785	Reservoir Sampling	2710
786	Merge K Sorted Linked Lists	2706
787	Range LCM Queries	2705
788	Palindrome Partitioning	2703
789	Print a Binary Tree in Vertical Order	2692
790	Sorting a K Sorted Array	2692
791	Balanced Binary Tree	2687
792	Hamming Distance	2685
793	Missing Number	2680
794	The Painter’s Partition Problem	2676
795	Maximum Product Subarray	2669
796	Peak Index in a Mountain Array LeetCode Solution	2665
797	Create Maximum Number	2664
798	Maximum difference between two elements such as larger element comes after smaller	2662
799	Iterative Postorder Traversal Using Two Stacks	2655
800	Check if Two Expressions With Brackets are Same	2655
801	Friends Of Appropriate Ages LeetCode Solution	2654
802	Check if a queue can be sorted into another queue using a stack	2654
803	Defanging an IP Address LeetCode Solution	2651
804	Valid Triangle Number LeetCode Solution	2650
805	Find Maximum Sum Possible Equal Sum of Three Stacks	2646
806	Lowest Common Ancestor	2643
807	Verify Preorder Serialization of a Binary Tree	2641
808	Find Three Element From Different Three Arrays Such That a + b + c = sum	2640
809	Minimum insertions to form a palindrome with permutations allowed	2635
810	Count number of triplets with product equal to given number	2632
811	Find Sum of all unique sub-array sum for a given array	2630
812	Sort Elements by Frequency II	2630
813	Find Element Using Binary Search in Sorted Array	2628
814	Unique Binary Search Trees LeetCode Solution	2626
815	Find distance between two nodes of a Binary Tree	2624
816	Valid Triangle Number LeetCode Solution	2623
817	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2623
818	Find subarray with given sum (Handles Negative Numbers)	2623
819	Check if a given array can represent Preorder Traversal of Binary Search Tree	2621
820	Vertical sum in a given binary tree	2621
821	Newman-Conway Sequence	2618
822	Smallest Range II Leetcode Solution	2617
823	Check if two nodes are on the same path in a Tree	2600
824	Merging Two Sorted Arrays	2600
825	Largest Submatrix With Rearrangements LeetCode Solution	2599
826	Minimum Distance Between BST Nodes Leetcode Solution	2599
827	Number Of Longest Increasing Subsequence	2598
828	Find K Length Subarray of Maximum Average	2598
829	Segment Tree	2590
830	Maximum subsequence sum such that no three are consecutive	2588
831	Check Completeness of a Binary Tree LeetCode Solution	2587
832	First Bad Version	2585
833	Find Common Characters Leetcode Solution	2582
834	Third Maximum Number Leetcode Solution	2581
835	Print all triplets in sorted array that form AP	2581
836	Print All Distinct Elements of a Given Integer Array	2576
837	Flatten 2D Vector LeetCode Solution	2573
838	Products of ranges in an array	2570
839	Arrange given numbers to form the biggest number	2570
840	Range Sum Query using Sparse Table	2569
841	Maximum number of segments of lengths a, b and c	2569
842	Largest subarray with equal number of 0s and 1s	2568
843	Lower Case To Upper Case	2567
844	Longest Bitonic Subsequence	2565
845	Find Smallest Range Containing Elements from k Lists	2559
846	Closest Leaf in a Binary Tree LeetCode Solution	2554
847	Diagonal Traversal of Binary Tree	2552
848	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2550
849	Find Peak Element	2549
850	Valid Parenthesis String	2547
851	Array Nesting Leetcode Solution	2546
852	Employee Importance LeetCode Solution	2546
853	Stone Game IV LeetCode Solution	2545
854	Trapping Rain Water II LeetCode Solution	2540
855	Median of Two Sorted Arrays	2536
856	Find Nth Node	2536
857	Maximum Population Year LeetCode Solution	2533
858	Contiguous Array	2529
859	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2526
860	Print Right View of a Binary Tree	2526
861	Distinct Subsequences	2523
862	Write a function to get the intersection point of two Linked Lists	2518
863	Longest Palindromic Subsequence	2518
864	Bottom View of a Binary Tree	2516
865	Largest BST Subtree LeetCode Solution	2509
866	Shuffle an Array	2508
867	Largest divisible pairs subset	2506
868	Infix to Postfix	2503
869	Four Elements that Sum to Given	2499
870	Number of siblings of a given Node in n-ary Tree	2493
871	Path Sum	2492
872	Count and Say	2489
873	Stone Game IV LeetCode Solution	2486
874	Find the largest multiple of 3	2482
875	Binary array after M range toggle operations	2481
876	Subset Sum Problem in O(sum) space	2481
877	Isomorphic Strings	2481
878	Merge Two Sorted Arrays	2477
879	Permutations of a Given String Using STL	2475
880	Unique Binary Search Trees	2473
881	Red-Black Tree Introduction	2469
882	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2465
883	Closest Binary Search Tree Value Leetcode Solution	2461
884	Friends Pairing Problem	2455
885	Height of a generic tree from parent array	2455
886	Next Greater Element in an Array	2453
887	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2452
888	The Number of Weak Characters in the Game LeetCode Solution	2448
889	Maximum Product Subarray	2442
890	Find Largest d in Array such that a + b + c = d	2440
891	Count Primes in Ranges	2437
892	Valid Perfect Square LeetCode Solution	2430
893	Valid Number	2428
894	Sentence Screen Fitting LeetCode Solution	2427
895	Insert Delete GetRandom	2418
896	Encoded String With Shortest Length LeetCode Solution	2417
897	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2415
898	Range Minimum Query (Square Root Decomposition and Sparse Table)	2414
899	Transform a BST to Greater sum Tree	2410
900	Print n terms of Newman-Conway Sequence	2407
901	Averages of Levels in Binary Tree	2407
902	Find unique character in a string	2397
903	Shuffle a given Array	2391
904	Binary Search Tree Delete Operation	2390
905	Maximum Sum of 3 Non-Overlapping Subarrays	2385
906	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2382
907	Edit Distance	2380
908	Binary Tree Longest Consecutive Sequence LeetCode Solution	2377
909	Convert BST into a Min-Heap without using array	2377
910	Integer to Roman	2369
911	Serialize and Deserialize Binary Tree LeetCode Solution	2365
912	Reorganize String	2364
913	Minimum sum of squares of character counts in a given string after removing k characters	2363
914	Orderly Queue LeetCode Solution	2359
915	Maximum Product Subarray	2355
916	Range Queries for Longest Correct Bracket Subsequence	2352
917	Next greater element	2350
918	Find Minimum In Rotated Sorted Array	2347
919	Serialize and Deserialize Binary Tree	2346
920	Kth Smallest Number in Multiplication Table Leetcode Solution	2343
921	Lowest Common Ancestor in Binary Search Tree	2336
922	Koko Eating Bananas LeetCode Solution	2335
923	Array Queries for multiply replacements and product	2334
924	Next Greater Element II LeetCode Solution	2333
925	K’th Largest element in BST using constant extra space	2333
926	Bold Words in String LeetCode Solution	2332
927	Find the smallest binary digit multiple of given number	2331
928	Swap Nodes In Pairs	2329
929	Maximum Sum Increasing Subsequence	2313
930	Diameter of N-Ary Tree LeetCode Solution	2312
931	K’th Largest Element in BST when modification to BST is not allowed	2302
932	Advantages of BST over Hash Table	2298
933	Insert into a Sorted Circular Linked List LeetCode Solution	2296
934	Constant time range add operation on an array	2296
935	Moving Stones Until Consecutive Leetcode Solution	2294
936	Write Code to Determine if Two Trees are Identical	2289
937	Design Underground System Leetcode Solution	2284
938	Valid Tic-Tac-Toe State LeetCode Solution	2275
939	Best Meeting Point LeetCode Solution	2274
940	Queries on XOR of greatest odd divisor of the range	2256
941	Check if an Array is Stack Sortable	2256
942	Reverse a Path in BST using Queue	2251
943	Power of Two	2251
944	Longest Increasing Consecutive Subsequence	2250
945	Number of elements less than or equal to a given number in a given subarray	2248
946	Numbers with prime frequencies greater than or equal to k	2247
947	Total Hamming Distance LeetCode Solution	2246
948	Check if each internal node of a BST has exactly one child	2237
949	Number of Orders in the Backlog Leetcode Solution	2236
950	Check if X can give change to every person in the Queue	2235
951	Greatest Sum Divisible by Three LeetCode Solution	2232
952	Form minimum number from given sequence	2230
953	Image Overlap LeetCode Solution	2229
954	Clone a Binary Tree with Random Pointers	2227
955	Level Order Traversal of Binary Tree	2227
956	Maximum Array from Two given Arrays Keeping Order Same	2226
957	Find the node with minimum value in a Binary Search Tree	2226
958	A program to check if a binary tree is BST or not	2223
959	Count the Pairs at Same Distance as in English Alphabets	2223
960	Find minimum number of merge operations to make an array palindrome	2222
961	Design Add and Search Words Data Structure LeetCode Solution	2216
962	Graph Cloning	2212
963	Factorial Trailing Zeroes LeetCode Solution	2206
964	Count and Toggle Queries on a Binary Array	2205
965	Merge Sort	2205
966	Collect maximum points in a grid using two traversals	2202
967	Closest Binary Search Tree Value II LeetCode Solution	2195
968	Largest Plus Sign Leetcode Solution	2190
969	Form Minimum Number From Given Sequence	2188
970	Check for Palindrome after every character replacement Query	2187
971	Print Next Greater Number of Q queries	2185
972	Merge two BSTs with limited extra space	2184
973	Queries for Decimal Values of Subarrays of a Binary Array	2179
974	Merge Sorted Array	2179
975	Maximum difference between first and last indexes of an element in array	2177
976	Group Shifted Strings Leetcode Solution	2175
977	Dividing Array into Pairs With Sum Divisible by K	2174
978	Print all Possible Ways to Break a String in Bracket Form	2174
979	Print Ancestors of a Given Binary Tree Node Without Recursion	2153
980	Priority Queue	2150
981	Excel Sheet Column Number LeetCode Solution	2142
982	Count even length binary sequences with same sum of first and second half bits	2135
983	Print modified array after multiple array range increment operations	2135
984	Longest Substring Without Repeating Characters Leetcode Solution	2129
985	Binary Search Tree	2124
986	Guess The Word	2124
987	Palindrome Partitioning	2121
988	Swim in Rising Water LeetCode Solution	2119
989	Minimum Moves to Equal Array Elements LeetCode Solution	2114
990	Cutting a Rod	2111
991	Find postorder traversal of BST from preorder traversal	2104
992	Kth Smallest Element in a BST	2100
993	Unique Paths II	2090
994	Excel Sheet Column Title LeetCode Solution	2089
995	Count Pairs Whose Products Exist in Array	2081
996	Find maximum average subarray of k length	2071
997	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	2070
998	How to print maximum number of A’s using given four keys	2068
999	Binary Search Tree Search and Insertion	2064
1000	Regular Expression Matching	2062
1001	Longest Common Prefix using Character by Character Matching	2051
1002	Check given array of size n can represent BST of n levels or not	2047
1003	Sum of Left Leaves LeetCode Solution	2046
1004	K Empty Slots	2036
1005	Sorted Array to Balanced BST	2014
1006	Queries for Number of Distinct Elements in a Subarray	2010
1007	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	2008
1008	Decrease Elements To Make Array Zigzag LeetCode Solution	1998
1009	Maximum Depth Of Binary Tree	1990
1010	Iterative method to find ancestors of a given binary tree	1982
1011	Find the Town Judge LeetCode Solution	1973
1012	Construct Complete Binary Tree from its Linked List Representation	1971
1013	Shortest Unsorted Continuous Subarray LeetCode Solution	1960
1014	Binary Tree to Binary Search Tree Conversion using STL set	1940
1015	Maximum weight transformation of a given string	1939
1016	Find Maximum Depth of Nested Parenthesis in a String	1939
1017	Symmetric Tree LeetCode Solution Leetcode Solution	1922
1018	Data Structure Designing	1905
1019	Random Pick Index LeetCode Solution	1904
1020	Search in Sorted Rotated Array	1893
1021	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1863
1022	Search an Element in Sorted Rotated Array	1850
1023	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1848
1024	Next Greater Element I Leetcode Solution	1847
1025	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1834
1026	Print Maximum Length Chain of Pairs	1828
1027	Flatten Binary Tree to Linked List LeetCode Solution	1805
1028	Maximum Binary Tree	1784
1029	Find k-th smallest element in BST (Order Statistics in BST)	1754
1030	Peeking Iterator LeetCode Solution	1749
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1698