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	43767
2	Maximum occurring character in a string	19859
3	Plus One Leetcode Solution	19517
4	Valid Parentheses LeetCode Solution	19355
5	3Sum Leetcode Solution	17570
6	Merge Sorted Arrays Leetcode Solution	15466
7	First Repeating Element	15326
8	Single Number Leetcode Solution	15004
9	Count Primes Leetcode Solutions	14797
10	Pow(x, n) Leetcode Solution	14670
11	Sqrt(x) Leetcode Solution	14449
12	Meeting Rooms II LeetCode Solution	13477
13	Concatenation of Array LeetCode Solution	12957
14	Roman to Integer Leetcode Solution	12112
15	Valid Palindrome Leetcode Solution	11961
16	Contains Duplicate II Leetcode Solution	11864
17	Search Insert Position Leetcode Solution	11861
18	Palindrome Number LeetCode Solution	11685
19	Remove Duplicates from Sorted Array Leetcode Solution	11555
20	Jump Game Leetcode Solution	11286
21	Reverse Vowels of a String Leetcode Solution	11259
22	Number of Good Pairs Leetcode Solution	11213
23	Longest Substring Without Repeating Characters LeetCode Solution	11204
24	Intersection of Two Arrays II Leetcode Solution	11186
25	Spiral Matrix LeetCode Solution	10958
26	Kids With the Greatest Number of Candies Leetcode Solution	10874
27	House Robber Leetcode Solution	10870
28	Add Binary Leetcode Solution	10746
29	Maximum Subarray Leetcode Solution	10395
30	Number Of 1 bits	10288
31	Find the Maximum Repeating Number in Array	10124
32	Text Justification LeetCode Solution	10019
33	Move Zeroes LeetCode Solution	9919
34	Jewels and Stones Leetcode Solution	9900
35	Min Stack Leetcode Solution	9862
36	Power of Two Leetcode Solution	9644
37	Longest Palindromic Substring LeetCode Solution	9639
38	Permutations Leetcode Solution	9590
39	Shuffle String Leetcode Solution	9589
40	Word Search Leetcode Solution	9464
41	Third Maximum Number Leetcode Solution	9445
42	Evaluation of Postfix Expression	9417
43	Daily Temperatures Leetcode Solution	9413
44	Find All Numbers Disappeared in an Array Leetcode Solution	9376
45	Median of Two Sorted Arrays LeetCode Solution	9339
46	Next Permutation Leetcode Solution	9296
47	Search in Rotated Sorted Array Leetcode Solution	9267
48	Number of Islands LeetCode Solution	9162
49	Kth Missing Positive Number Leetcode Solution	9155
50	Maximum Profit in Job Scheduling Leetcode Solution	9145
51	Next Greater Element I Leetcode Solution	9067
52	Longest Common Prefix Leetcode Solution	9029
53	Frog Jump Leetcode Solution	8878
54	Valid Anagram Leetcode Solution	8806
55	Find Minimum Distance Between Two Numbers in an Array	8727
56	Running Sum of 1d Array Leetcode Solution	8716
57	Shuffle the Array Leetcode Solution	8683
58	Rotate Image LeetCode Solution	8645
59	Multiply Strings Leetcode Solution	8608
60	Combination Sum Leetcode Solution	8587
61	Can Place Flowers LeetCode Solution	8577
62	House Robber II Leetcode Solution	8528
63	Count and Say Leetcode Solution	8513
64	3Sum Closest LeetCode Solution	8444
65	Bulb Switcher LeetCode Solution	8413
66	Koko Eating Bananas Leetcode Solution	8291
67	Best Time to Buy and Sell Stock LeetCode Solution	8275
68	Subarray and Subsequence	8226
69	Excel Sheet Column Title Leetcode Solution	8224
70	Happy Number Leetcode Solution	8207
71	Isomorphic Strings Leetcode Solution	8166
72	Majority Element Leetcode Solution	8124
73	Candy LeetCode Solution	8111
74	Missing Number Leetcode Solution	8089
75	Integer to Roman Leetcode Solution	8067
76	Count Pairs With Given Sum	8065
77	Product of array except self	7980
78	A Product Array Puzzle	7951
79	Rotate String LeetCode Solution	7946
80	Strobogrammatic Number LeetCode Solution	7904
81	Binary Search LeetCode Solution	7825
82	Reverse String Without Temporary Variable	7824
83	Is Subsequence Leetcode Solution	7807
84	Find the Difference Leetcode Solution	7764
85	Find the Duplicate Number LeetCode Solution	7757
86	Expression Evaluation	7752
87	Largest Number Leetcode Solution	7727
88	Find Common Characters Leetcode Solution	7719
89	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7601
90	String to Integer (atoi) LeetCode Solution	7568
91	Subset Leetcode	7565
92	Rabin Karp Algorithm	7533
93	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7514
94	Summary Ranges Leetcode Solution	7457
95	Set Matrix Zeroes	7430
96	Boolean Parenthesization Problem	7425
97	Balanced Binary Tree Leetcode Solution	7382
98	Word Pattern LeetCode Solution	7358
99	Sort Characters By Frequency LeetCode Solution	7337
100	Find the Town Judge Leetcode Solution	7325
101	Find the Winner of the Circular Game LeetCode Solution	7288
102	Unique Paths Leetcode Solution	7285
103	Arranging Coins Leetcode Solution	7268
104	Rearrange Positive and Negative Numbers Alternatively in Array	7224
105	Group Anagrams LeetCode Solution	7170
106	Postfix to Infix Conversion	7165
107	String Compression LeetCode Solution	7137
108	Asteroid Collision LeetCode Solution	7086
109	Page Replacement Algorithms in Operating Systems	7051
110	Repeated Substring Pattern LeetCode Solution	7011
111	Smallest window in a string containing all characters of another string	6990
112	Best Time to Buy and Sell Stock II Leetcode Solution	6948
113	Sort Colors LeetCode Solution	6940
114	Matrix Chain Multiplication using Dynamic Programming	6937
115	Sort Array By Parity LeetCode Solution	6796
116	Zigzag Conversion LeetCode Solution	6795
117	Sum of minimum and maximum elements of all subarrays of size k	6772
118	Kth largest element in an Array Leetcode Solutions	6768
119	Valid Palindrome II Leetcode Solution	6742
120	Divide Two Integers Leetcode Solution	6734
121	Generate Parentheses Leetcode Solution	6724
122	Find the Row with Maximum Number of 1’s	6665
123	Decode String Leetcode Solution	6655
124	Assign Cookies Leetcode Solution	6653
125	Pascal Triangle Leetcode	6635
126	Reverse Integer Leetcode Solution	6602
127	Remove Duplicates from Sorted Array II Leetcode Solution	6596
128	Product of Array Except Self LeetCode Solution	6586
129	Length of Last Word Leetcode Solution	6575
130	H-Index Leetcode Solution	6571
131	Bus Routes Leetcode Solution	6530
132	Merge Two Sorted Lists Leetcode Solutions	6493
133	Number of Provinces Leetcode Solution	6490
134	Prefix to Infix Conversion	6464
135	Linked List Cycle II LeetCode Solution	6416
136	Convert array into Zig-Zag fashion	6400
137	Minimum Steps to reach target by a Knight	6400
138	Minimum Cost For Tickets Leetcode Solution	6389
139	Employee Free Time LeetCode Solution	6373
140	Defanging an IP Address Leetcode Solution	6361
141	Optimal Account Balancing LeetCode Solution	6359
142	Pascal’s Triangle II Leetcode Solution	6312
143	Find First and Last Position of Element in Sorted Array Leetcode Solution	6262
144	Bellman Ford Algorithm	6213
145	First element occurring k times in an array	6207
146	Implementation of Deque using Doubly Linked List	6204
147	Island Perimeter Leetcode Solution	6202
148	Increasing Triplet Subsequence LeetCode Solution	6182
149	OSI Model	6177
150	Merge Sorted Array LeetCode Solution	6174
151	Build Array From Permutation Leetcode Solution	6163
152	Majority Element II Leetcode Solution	6140
153	Robot Room Cleaner Leetcode Solution	6130
154	KMP Algorithm	6109
155	Max Consecutive Ones Leetcode Solution	6095
156	Find Pair with Given Difference	6051
157	Check if the Elements of an Array are Consecutive	6049
158	Swap Nodes in Pairs Leetcode Solutions	6037
159	K-th Smallest Element in a Sorted Matrix	6027
160	Set Matrix Zeroes Leetcode Solution	6013
161	Add Two Numbers II Leetcode Solution	6008
162	Find the Missing Number	5979
163	Guess Number Higher or Lower LeetCode Solution	5963
164	Lemonade Change Leetcode Solution	5948
165	Trapping Rain Water Leetcode Solution	5938
166	First negative integer in every window of size k	5927
167	Fibonacci Number LeetCode Solution	5922
168	Design Parking System Leetcode Solution	5913
169	Subarray Sum Equals K LeetCode Solution	5911
170	Delete middle element of a stack	5886
171	Word Ladder LeetCode Solution	5865
172	First Unique Character in a String LeetCode Solution	5842
173	Last Stone Weight	5842
174	Subarray with Given Sum	5834
175	Coin Change 2 Leetcode Solution	5825
176	Length of the largest subarray with contiguous elements	5807
177	Monotonic Array LeetCode Solution	5803
178	Find All Duplicates in an Array LeetCode Solution	5796
179	Capacity To Ship Packages Within D Days Leetcode Solution	5795
180	String Compression	5790
181	Subarray Product Less Than K LeetCode Solution	5789
182	Repeated Substring Pattern	5767
183	Form Minimum Number from Given Sequence of D’s and I’s	5764
184	Palindrome Linked List Leetcode Solution	5759
185	Single Element in a Sorted Array LeetCode Solution	5734
186	Find Smallest Missing Number in a Sorted Array	5690
187	Leetcode Permutations	5653
188	Continuous Subarray Sum LeetCode Solution	5647
189	Remove Duplicates from Sorted List II LeetCode Solution	5641
190	01 Matrix LeetCode Solution	5641
191	Prefix to Postfix Conversion	5625
192	Combinations Leetcode Solution	5624
193	Combination Sum	5579
194	Reverse Words in a String III LeetCode Solution	5563
195	Valid Perfect Square Leetcode Solution	5557
196	Iterative Implementation of Quick Sort	5552
197	Break a Palindrome LeetCode Solution	5546
198	Same Tree LeetCode Solution	5534
199	Remove Linked List Elements Leetcode Solution	5495
200	Merge k Sorted Lists Leetcode Solution	5484
201	Insert Delete GetRandom O(1) Leetcode Solution	5482
202	Rotate List Leetcode Solution	5467
203	Slowest Key Leetcode Solution	5462
204	Top K Frequent Elements LeetCode Solution	5461
205	Container With Most Water LeetCode Solution	5454
206	Relative Ranks Leetcode Solution	5452
207	Contains Duplicate LeetCode Solution	5443
208	Backspace String Compare	5435
209	Find Peak Element LeetCode Solution	5409
210	Cuckoo sequence program	5400
211	Maximum Product of Three Numbers LeetCode Solution	5389
212	Find the Duplicate Element	5330
213	Palindrome Number	5326
214	Subarray Sum Equals k	5322
215	Printing brackets in Matrix Chain Multiplication Problem	5314
216	The K Weakest Rows in a Matrix Leetcode Solution	5300
217	Kth Largest Element in a Stream Leetcode Solution	5297
218	Longest Common Subsequence LeetCode Solution	5266
219	Second Most Repeated Word in a Sequence	5250
220	Find Leaders in an Array	5242
221	Remove All Occurrences of a Substring LeetCode Solution	5232
222	Max Area of Island	5232
223	Rearrange given Array in Maximum Minimum Form	5215
224	Generate all Binary Strings Without Consecutive 1’s	5209
225	Relative Sort Array Leetcode Solution	5199
226	Unique Paths II Leetcode Solution	5194
227	Scramble String	5193
228	Arithmetic Expression Evaluation	5181
229	Permutation in String Leetcode Solution	5180
230	Target Sum	5172
231	Check If Two String Arrays are Equivalent Leetcode Solution	5171
232	Convert a Number to Hexadecimal Leetcode Solution	5168
233	Make The String Great Leetcode Solution	5163
234	Delete Node in a Linked List Leetcode Solution	5134
235	Letter Combinations of a Phone Number	5121
236	Time Based Key-Value Store LeetCode Solution	5113
237	N-Queens LeetCode Solution	5109
238	Find Triplet in Array With a Given Sum	5107
239	Moving Average from Data Stream Leetcode Solution	5100
240	Construct Binary Tree from Given Inorder and Preorder Traversals	5096
241	Count Good Nodes in Binary Tree Leetcode Solution	5083
242	Stone Game LeetCode	5074
243	Next Permutation	5060
244	LRU Cache LeetCode Solution	5050
245	Number of Dice Rolls With Target Sum LeetCode Solution	5033
246	Prim’s Algorithm	5018
247	Find N Unique Integers Sum up to Zero Leetcode Solution	5017
248	Check If N and Its Double Exist Leetcode Solution	5010
249	Minimum Operations to convert X to Y	5006
250	Min Stack	4981
251	Given two unsorted arrays find all pairs whose sum is x	4977
252	Number of Steps to Reduce a Number to Zero Leetcode Solution	4972
253	Remove Minimum Characters so that Two Strings Become Anagrams	4970
254	Flipping an Image LeetCode Solution	4943
255	Minimum swaps required to bring all elements less than or equal to k together	4913
256	Find The Duplicate Number	4908
257	Minimum Knight Moves LeetCode Solution	4906
258	Top K Frequent Elements	4903
259	Stock Buy Sell to Maximize Profit	4898
260	Min Cost Climbing Stairs LeetCode Solution	4890
261	Reverse Only Letters LeetCode Solution	4879
262	Student Attendance Record I Leetcode Solution	4858
263	Smallest Positive Number Missing in an Unsorted Array	4851
264	To Lower Case Leetcode Solution	4828
265	Maximum Sum Increasing Subsequence	4824
266	Single Number	4818
267	License Key Formatting Leetcode Solution	4795
268	The kth Factor of n Leetcode Solution	4793
269	Reverse words in a string	4793
270	Maximum Subarray Sum using Divide and Conquer	4792
271	Maximum Population Year LeetCode Solution	4744
272	Longest Common Subsequence	4692
273	Top K Frequent Words LeetCode Solution	4690
274	Find the Number Occurring Odd Number of Times in an Array	4683
275	Remove Nth Node From End of List Leetcode Solution	4667
276	Find Words That Can Be Formed by Characters Leetcode Solution	4658
277	BFS for Disconnected Graph	4656
278	Sudoku Solver	4655
279	Search Suggestions System LeetCode Solution	4652
280	Minimum Path Sum Leetcode Solution	4650
281	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4646
282	Reformat Date LeetCode Solution	4642
283	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4613
284	Reveal Cards In Increasing Order Leetcode Solution	4598
285	Sum of Subarray Ranges Leetcode Solution	4594
286	Maximum Depth of Binary Tree Leetcode Solution	4589
287	Intersection of Two Arrays	4572
288	Sort Elements by Frequency of Occurrences	4572
289	Best Time to Buy and Sell Stock III Leetcode Solution	4571
290	N-th Tribonacci Number Leetcode Solution	4556
291	House Robber	4548
292	Maximum Size Subarray Sum Equals k Leetcode Solution	4540
293	Find any one of the multiple repeating elements in read only array	4540
294	Reverse Nodes in k-Group LeetCode Solution	4539
295	Diagonal Traverse LeetCode Solution	4523
296	Evaluate Division	4520
297	Maximize Distance to Closest Person LeetCode Solution	4516
298	Most Frequent Element in an Array	4504
299	Reverse individual words	4498
300	Remove All Ones With Row and Column Flips Leetcode Solution	4497
301	Minimum Characters to be Added at Front to Make String Palindrome	4488
302	Range Sum Query 2D – Immutable Leetcode Solution	4486
303	Length of Longest valid Substring	4483
304	Design A Leaderboard Leetcode Solution	4481
305	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4477
306	Binary Tree Inorder Traversal LeetCode Solution	4471
307	Find if Path Exists in Graph Leetcode Solution	4467
308	Last Stone Weight II LeetCode Solution	4465
309	Count of index pairs with equal elements in an array	4462
310	Count Number of Occurrences in a Sorted Array	4460
311	Remove Duplicates from Sorted List LeetCode Solution	4444
312	Minimum number of Merge Operations to make an Array Palindrome	4438
313	Split Linked List in Parts Leetcode Solution	4415
314	Implement a stack using single queue	4415
315	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4400
316	Brightest Position on Street LeetCode Solution	4382
317	Find the Closest Palindrome number	4373
318	Dijkstra Algorithm	4368
319	Mobile Numeric Keypad Problem	4356
320	Find Leaves of Binary Tree LeetCode Solution	4352
321	Reverse Bits	4338
322	Spiral Matrix II Leetcode Solution	4329
323	Special Positions in a Binary Matrix Leetcode Solution	4326
324	Arrange given Numbers to Form the Biggest Number II	4326
325	Invalid Transactions LeetCode Solution	4314
326	Symmetric Tree Leetcode Solution	4308
327	Round Robin Scheduling	4303
328	Maximum Subarray	4298
329	Shortest Word Distance Leetcode Solution	4296
330	Paint House LeetCode Solution	4291
331	Sort Array By Parity II Leetcode Solution	4244
332	Find Duplicates in an Array in Most Efficient Way	4240
333	Diagonal Traversal LeetCode Solution	4238
334	Recursion	4236
335	One Edit Distance LeetCode Solution	4231
336	Maximal Square	4227
337	Hamming Distance Leetcode Solution	4224
338	Rank Transform of an Array Leetcode Solution	4214
339	Partition Labels LeetCode Solution	4208
340	Largest Rectangle in Histogram LeetCode Solution	4198
341	Remove Invalid Parentheses Leetcode Solution	4197
342	Minimum Moves to Equal Array Elements Leetcode Solution	4195
343	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4194
344	Alien Dictionary LeetCode Solution	4190
345	Tug of War	4190
346	Jump Game	4189
347	Unique Paths	4185
348	String Matching in an Array Leetcode Solution	4183
349	Find Winner on a Tic Tac Toe Game Leetcode Solution	4181
350	Postfix to Prefix Conversion	4153
351	Minimum Time to Collect All Apples in a Tree LeetCode Solution	4152
352	Count of Triplets With Sum Less than Given Value	4150
353	The Celebrity Problem	4143
354	Next Permutation LeetCode Solution	4129
355	Validate Stack Sequences LeetCode Solution	4125
356	Bitwise AND of Numbers Range LeetCode Solution	4125
357	Merge Two Sorted Linked Lists	4119
358	Construct BST from its given Level Order Traversal	4115
359	Unique Paths III LeetCode Solution	4114
360	Range Sum of BST LeetCode Solution	4112
361	Lowest Common Ancestor of a Binary Tree Leetcode Solution	4107
362	Least Number of Unique Integers after K Removals Leetcode Solution	4102
363	Minimum Depth of Binary Tree Leetcode Solution	4102
364	Given an Array of Pairs Find all Symmetric Pairs in it	4099
365	Minimum operation to make all elements equal in array	4097
366	Smallest Subarray with k Distinct Numbers	4094
367	Transpose Graph	4086
368	Minimum Time Visiting All Points Leetcode Solution	4080
369	Invert Binary Tree LeetCode Solution	4079
370	Maximum Circular Subarray Sum	4078
371	Toeplitz Matrix	4071
372	Pair of Positive Negative Values in an Array	4069
373	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	4066
374	Longest Common Prefix using Trie	4058
375	Clone Graph LeetCode Solution	4041
376	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	4039
377	Check whether Strings are K Distance Apart or Not	4039
378	Robot Bounded In Circle LeetCode Solution	4038
379	Find minimum difference between any two elements	4038
380	Kruskal Algorithm	4037
381	Next Greater Element III LeetCode Solution	4033
382	Ugly Number II LeetCode Solution	4030
383	3 Sum	4030
384	K Empty Slots LeetCode	4021
385	Minimum Cost to Hire K Workers	4016
386	Longest Substring with At Most K Distinct Characters LeetCode Solution	4014
387	Substring with Concatenation of All Words Leetcode Solution	4011
388	4Sum	4011
389	Check if a given array contains duplicate elements within k distance from each other	3998
390	Max stack	3986
391	LRU Cache Implementation	3985
392	Find the First and Second Smallest Elements	3985
393	Implementation of Deque using circular array	3983
394	Word Search	3976
395	Graph Valid Tree LeetCode Solution	3971
396	Longest subarray not having more than K distinct elements	3966
397	Minimize Maximum Pair Sum in Array LeetCode Solution	3963
398	Sort a stack using a temporary stack	3963
399	Invert Binary Tree LeetCode Solution	3956
400	Regular Expression Matching Regular Expression Matching LeetCode Solution	3954
401	Stack Permutations (Check if an array is stack permutation of other)	3954
402	Sliding Window Technique	3954
403	Stone Game II Leetcode	3938
404	Permutation Sequence LeetCode Solution	3935
405	Non-decreasing Array LeetCode Solution	3934
406	Longest subsequence such that difference between adjacents is one	3933
407	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3928
408	Find the subarray with least average	3927
409	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3922
410	Find the Smallest Divisor given a Threshold Leetcode Solution	3922
411	Kth Smallest Element in a BST Leetcode Solution	3921
412	Design Browser History LeetCode Solution	3919
413	Find duplicates in a given array when elements are not limited to a range	3910
414	Priority Queue using doubly linked list	3906
415	Number Complement Leetcode Solution	3901
416	Top View of Binary Tree	3900
417	Queries for counts of array elements with values in given range	3898
418	Number of Islands II LeetCode Solution	3897
419	Missing Element in Sorted Array LeetCode Solution	3896
420	Minesweeper LeetCode Solution	3883
421	LRU Cache Leetcode Solution	3877
422	K Closest Points to Origin Leetcode Solution	3876
423	Painting Fence Algorithm	3876
424	Common elements in all rows of a given matrix	3876
425	Partition List Leetcode Solution	3869
426	Maximum Number of Occurrences of a Substring Leetcode Solution	3865
427	Path With Maximum Minimum Value LeetCode Solution	3856
428	First Circular Tour to Visit all the Petrol Bunks	3854
429	Nth Catalan Number	3853
430	Find the Peak Element from an Array	3850
431	Snakes and Ladders LeetCode Solution	3849
432	Find Top K (or Most Frequent) Numbers in a Stream	3847
433	Fibonacci Number LeetCode Solution	3840
434	Number of Smaller Elements on Right Side	3840
435	Can Make Arithmetic Progression From Sequence Leetcode Solution	3833
436	Sequences of given length where every element is more than or equal to twice of previous	3833
437	Sliding Window Maximum LeetCode Solution	3820
438	Combination Sum IV LeetCode Solution	3817
439	Find Maximum Level sum in Binary Tree	3817
440	Sort elements by frequency	3813
441	Maximum Consecutive Numbers Present in an Array	3809
442	High Five LeetCode Solution	3807
443	Search a 2D Matrix II Leetcode Solution	3805
444	Integer Break LeetCode Solution	3804
445	Odd Even Linked List Leetcode Solution	3803
446	Tiling Problem	3799
447	Flood Fill LeetCode	3792
448	Insert Interval Leetcode Solution	3788
449	Check if Two given Strings are Isomorphic to each other	3786
450	Gold Mine Problem	3781
451	Count items common to both the lists but with different prices	3779
452	Move All the Zeros to the End of the Given Array	3778
453	Rearrange array such that even positioned are greater than odd	3776
454	Find Minimum in Rotated Sorted Array II LeetCode Solution	3766
455	Longest Palindrome can be Formed by Removing or Rearranging Characters	3763
456	Distance of nearest cell having 1 in a binary matrix	3756
457	Interval Tree	3756
458	Shortest Palindrome	3752
459	N queen problem	3751
460	Consecutive Characters LeetCode Solution	3738
461	Insert into a Binary Search Tree Leetcode Solution	3731
462	Search in a Binary Search Tree Leetcode Solution	3726
463	Kth Non-repeating Character	3723
464	Design a stack that supports getMin() in O(1) time and O(1) extra space	3715
465	Number of Closed Islands Leetcode Solution	3712
466	Trapping Rain Water LeetCode Solution	3704
467	Minimum Absolute Difference in BST Leetcode Solution	3702
468	Spiral Matrix III LeetCode Solution	3701
469	Replace Elements with Greatest Element on Right Side Leetcode Solution	3700
470	Find a Peak Element II LeetCode Solution	3695
471	Fibonacci numbers	3695
472	Expression Contains Redundant Bracket or Not	3691
473	Decompress Run-Length Encoded List Leetcode Solution	3685
474	Sort Colors	3685
475	Reverse a linked list	3685
476	Longest Common Prefix using Sorting	3682
477	Integer to English words	3679
478	Sliding Window Median Leetcode Solution	3678
479	Evaluate Reverse Polish Notation LeetCode Solution	3671
480	Check If Array Pairs Are Divisible by k LeetCode Solution	3671
481	Find All Possible Recipes from Given Supplies LeetCode Solution	3670
482	Find Pythagorean Triplets from Array	3663
483	Convert Sorted Array to Binary Search Tree Leetcode Solution	3659
484	Restore IP Addresses Leetcode Solution	3658
485	Queries for GCD of all numbers of an array except elements in a given range	3658
486	Coin Change Problem	3655
487	Minimum Path Sum	3653
488	Binary Tree Maximum Path Sum LeetCode Solution	3648
489	Vertical Order Traversal of Binary Tree LeetCode Solution	3644
490	Sorting array using Stacks	3644
491	Palindrome Substring Queries	3638
492	Balanced Expression with Replacement	3630
493	Sort an array according to the order defined by another array	3627
494	Majority Element	3609
495	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3608
496	Priority Queue in C++	3607
497	Best Time to Buy and Sell Stock	3605
498	Morris Traversal	3602
499	Multiplication of Two Matrices	3598
500	Camelcase Matching Leetcode Solution	3594
501	Subset sum problem	3591
502	Cells with Odd Values in a Matrix LeetCode Solution	3582
503	Find Median from Data Stream LeetCode Solution	3576
504	Number of Days Between Two Dates LeetCode Solution	3575
505	Find the first Repeating Number in a Given Array	3570
506	Queue using Stacks	3568
507	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3559
508	Path Crossing Leetcode Solution	3552
509	How to Implement Stack Using Priority Queue or Heap?	3551
510	Is Graph Bipartite? LeetCode Solution	3550
511	The Stock Span Problem	3550
512	Generate all Binary Strings from Given Pattern	3545
513	Design Hit Counter LeetCode Solution	3542
514	Path Sum II LeetCode Solution	3539
515	Sieve of Eratosthenes	3536
516	Detect a loop in the Linked List	3528
517	Analyze User Website Visit Pattern LeetCode Solution	3522
518	Count subarrays having total distinct elements same as original array	3520
519	Shortest Completing Word Leetcode Solution	3518
520	Kth ancestor of a node in binary tree	3517
521	Divide Chocolate LeetCode Solution	3515
522	Longest Increasing Path in a Matrix LeetCode Solution	3515
523	Pancake Sorting Problem	3515
524	Intersection of Two Linked Lists LeetCode Solution	3510
525	Largest rectangular sub-matrix whose sum is 0	3509
526	Count Submatrices With All Ones LeetCode Solution	3508
527	Find a Fixed Point in a Given Array	3499
528	Custom Sort String Leetcode Solution	3497
529	Monotonic Array Leetcode Solution	3494
530	Check if Array Contains Contiguous Integers With Duplicates Allowed	3486
531	Letter Case Permutation	3483
532	Group Anagrams	3481
533	Construction of Longest Increasing Subsequence (N log N)	3471
534	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3470
535	Minimum Height Trees	3470
536	Implement strStr() LeetCode Solution	3467
537	Different Ways to Add Parentheses Leetcode Solution	3465
538	Decode Ways	3465
539	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3458
540	Maximum Element in an Array which is Increasing and then Decreasing	3458
541	Valid Boomerang Leetcode Solution	3447
542	Queue based approach for first non-repeating character in a stream	3445
543	Merge Overlapping Intervals	3443
544	Scramble String LeetCode Solution	3442
545	Nearest Exit from Entrance in Maze LeetCode Solution	3436
546	How to Create Mergable Stack?	3434
547	Find maximum length Snake sequence	3430
548	Shifting Letters LeetCode Solution	3429
549	Perfect Squares LeetCode Solution	3428
550	Number of Distinct Islands Leetcode Solution	3426
551	Find the Lost Element From a Duplicated Array	3420
552	Decode String	3417
553	Best Time to Buy and Sell Stock IV LeetCode Solution	3409
554	First missing positive	3408
555	Implement Trie (Prefix Tree) Leetcode Solution	3406
556	Reorder Data in Log Files LeetCode Solution	3405
557	Longest Common Prefix using Divide and Conquer	3402
558	LCS (Longest Common Subsequence) of three strings	3397
559	Maximum Sum of Non Consecutive Elements	3396
560	Sliding Window Maximum	3394
561	Sort a stack using recursion	3392
562	Race Car LeetCode Solution	3389
563	Binary Tree zigzag level order Traversal	3386
564	Count Possible Triangles	3386
565	Most Stones Removed with Same Row or Column LeetCode Solution	3383
566	Design Skiplist LeetCode Solution	3382
567	Build an Array With Stack Operations Leetcode Solution	3378
568	Recover Binary Search Tree	3378
569	Find if an Expression has Duplicate Parenthesis or Not	3375
570	Number of Equivalent Domino Pairs Leetcode Solution	3374
571	Guess Number Higher or Lower II	3374
572	Champagne Tower LeetCode Solution	3373
573	Insert Node in the Sorted Linked List	3372
574	Largest Subarray with Equal Number of 0’s and 1’s	3361
575	Contiguous Array LeetCode Solution	3360
576	Minimum Bracket Reversals	3352
577	All Possible Full Binary Trees LeetCode Solution	3348
578	Rectangle Overlap LeetCode Solution	3347
579	Smallest Good Base	3343
580	Maximum Length of Chain Pairs	3341
581	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3331
582	Palindrome Permutation LeetCode Solution	3330
583	Find the two Numbers with Odd Occurrences in an Unsorted Array	3328
584	Find a Sorted Subsequence of size 3	3320
585	Longest Substring with At Least K Repeating Characters LeetCode Solution	3313
586	Longest Repeated Subsequence	3313
587	Maximum Number of Ways to Partition an Array LeetCode Solution	3309
588	Merge Two Binary Trees LeetCode Solution	3304
589	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3303
590	Recover Binary Search Tree Leetcode Solution	3302
591	Minimum Height Trees LeetCode Solution	3301
592	Find the Town Judge LeetCode Solution	3297
593	Maximum Depth of N-ary Tree Leetcode Solution	3297
594	Distance Between Bus Stops Leetcode Solution	3296
595	Rearrange Spaces Between Words Leetcode Solution	3294
596	Palindrome Partitioning Leetcode Solution	3291
597	Design a Stack With Increment Operation Leetcode Solution	3291
598	Implement Two Stacks in an Array	3287
599	Print all Palindromic Partitions of a String	3286
600	Reorder an Array According to the Given Indexes	3283
601	Valid Parentheses Leetcode Solution	3271
602	Subarrays with K Different Integers Leetcode Solution	3270
603	K-th Distinct Element in an Array	3269
604	Heap Sort	3263
605	Check for Balanced Parentheses in an Expression	3258
606	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3254
607	Minimum number of jumps to reach end	3254
608	The Maze III LeetCode Solution	3240
609	Huffman Coding	3239
610	Jump Game IV LeetCode Solution	3238
611	Maximum sum rectangle in a 2D matrix	3236
612	Sort a String According to Another String	3233
613	Find the First Circular Tour that visits all the Petrol Pumps	3230
614	Mean of Array After Removing Some Elements Leetcode Solution	3227
615	Count pair with Given Sum	3221
616	Maximize Elements Using Another Array	3221
617	Maximum Score After Splitting a String Leetcode Solution	3215
618	Contains Duplicate	3212
619	Perform String Shifts Leetcode	3211
620	Word Break	3204
621	Merge Overlapping Intervals II	3201
622	Valid Sudoku	3194
623	Find First and Last Position of Element in Sorted Array LeetCode Solution	3188
624	Find the Minimum Element in a Sorted and Rotated Array	3181
625	Palindrome Permutation	3179
626	Find Largest Value in Each Tree Row LeetCode Solution	3176
627	Minimum Jumps to Reach Home LeetCode Solution	3174
628	Convert BST to Min Heap	3174
629	Caesar Cipher	3170
630	Palindrome Permutations of a String	3168
631	Possible Bipartition LeetCode Solution	3166
632	Iterative Method to find Height of Binary Tree	3165
633	A Space Optimized DP solution for 0-1 Knapsack Problem	3165
634	Edit Distance LeetCode Solution	3159
635	All Unique Triplets that Sum up to a Given Value	3149
636	Palindromic Substrings Leetcode Solution	3144
637	Count Sub Islands LeetCode Solution	3141
638	Reach a Number LeetCode Solution	3129
639	Segregate 0s and 1s in an Array	3129
640	Best Meeting Point LeetCode Solution	3120
641	Find Median from data Stream	3116
642	Number of palindromic paths in a matrix	3113
643	My Calendar I LeetCode Solution	3112
644	Find the Subarray of given length with Least Average	3106
645	Find all triplets with zero sum	3105
646	Maximum Product of Splitted Binary Tree LeetCode Solution	3101
647	Merge Two Balanced Binary Search Trees	3100
648	Level order Traversal in Spiral Form	3098
649	Check if the given array can represent Level Order Traversal of Binary Search Tree	3094
650	Pair with given product	3093
651	Word Pattern	3091
652	Count Good Nodes in Binary Tree LeetCode Solution	3070
653	Brick Wall LeetCode Solution	3070
654	Partition Problem	3070
655	Sorted Linked List to Balanced BST	3065
656	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	3064
657	Breadth First Search (BFS) for a Graph	3059
658	Validate Binary Search Tree	3058
659	Alien Dictionary	3055
660	Convert Sorted List to Binary Search Tree	3047
661	Swapping Nodes in a Linked List Leetcode Solution	3042
662	Construct BST from given Preorder Traversal	3042
663	Isomorphic Strings LeetCode Solution	3038
664	Find whether a subarray is in form of a mountain or not	3037
665	Add two numbers	3035
666	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	3031
667	Minimum time required to rot all oranges	3028
668	How to Efficiently Implement k Stacks in a Single Array?	3028
669	Merge K Sorted Arrays and Print Sorted Output	3024
670	Sort 0s 1s and 2s in an Array	3024
671	Maximize Sum of Array after K Negations Leetcode Solution	3019
672	Rotate Array	3016
673	Queries on Probability of Even or Odd Number in given Ranges	3012
674	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	3011
675	Print Fibonacci sequence using 2 variables	3009
676	Largest Sum Contiguous Subarray	3008
677	Populating Next Right Pointers in Each Node	3008
678	Find all pairs (a, b) in an array such that a % b = k	3006
679	Bubble sort using two Stacks	3000
680	Longest Subarray Having Count of 1s One More than Count of 0s	2999
681	Count Distinct Elements in Every Window of Size K	2998
682	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2998
683	Remove brackets from an algebraic string containing + and – operators	2995
684	Range Sum Query 2D – Immutable LeetCode Solution	2980
685	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2977
686	Maximum Number of Chocolates to be Distributed Equally Among k Students	2974
687	Maximum Frequency Stack Leetcode Solution	2971
688	Find four elements that sum to a given value (Hashmap)	2963
689	Detect Capital Leetcode Solution	2962
690	Split Array Into Consecutive Subsequences	2958
691	Count ways to reach the nth stair using step 1, 2 or 3	2954
692	Minimum Swaps to Group All 1’s Together Leetcode Solution	2953
693	Merge Two Sorted Lists Leetcode	2946
694	Binary Tree Right Side View LeetCode Solution	2942
695	Difference Array \| Range update query in O(1)	2941
696	Partition Equal Subset Sum	2941
697	Remove duplicates from sorted array	2939
698	Binary Tree to Binary Search Tree Conversion	2937
699	Counting Bits	2937
700	Remove Palindromic Subsequences Leetcode Solution	2927
701	Print all subarrays with 0 sum	2927
702	Check if a Linked list of Strings form a Palindrome	2927
703	Partition to K Equal Sum Subsets Leetcode Solution	2925
704	Length of Longest Fibonacci Subsequence	2925
705	Topological Sorting	2920
706	Minimum Sum Path in a Triangle	2913
707	Happy Number	2912
708	Elements Appear more than N/K times in Array	2908
709	Find pairs with given sum such that elements of pair are in different rows	2906
710	Populating Next Right Pointers in Each Node Leetcode Solution	2903
711	Concatenation of Array LeetCode Solution	2899
712	Contiguous Array Leetcode	2899
713	Arithmetic Slices II – Subsequence LeetCode Solution	2892
714	Find All Pairs With a Given Difference	2888
715	Reverse Nodes in K-Group	2885
716	String comparison containing wildcards	2882
717	Queue Reconstruction by Height	2879
718	Web Crawler LeetCode Solution	2875
719	Inorder Successor of a node in Binary Tree	2873
720	Minimum Swaps to Make Strings Equal Leetcode Solution	2863
721	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2862
722	MiniMax Algorithm	2844
723	Maximum Distance in Array	2840
724	Increasing Subsequence of Length three with Maximum Product	2837
725	Score of Parenthesis LeetCode Solution	2835
726	Swap Kth Node from beginning with Kth Node from End	2828
727	Find Duplicate Subtrees	2823
728	Root to Leaf path with target sum Leetcode Solutions	2820
729	Finding K closest element	2816
730	An Interesting Method to generate Binary Numbers from 1 to n	2815
731	Longest Common Prefix Using Binary Search II	2812
732	Given a binary tree, how do you remove all the half nodes?	2811
733	Check if String Follows Order of Characters by a Pattern or not	2810
734	Longest Increasing Subsequence	2804
735	Climbing stairs	2792
736	Union and Intersection of two Linked Lists	2789
737	Pancake Sorting	2789
738	Iterative Preorder Traversal	2788
739	Delete Nth node from the end of the given linked list	2786
740	Maximum Product Subarray II	2786
741	Find K Closest Elements LeetCode Solution	2784
742	Find the first repeating element in an array of integers	2784
743	Symmetric Tree	2784
744	BFS vs DFS for Binary Tree	2778
745	Construct Binary Tree from given Parent Array representation	2777
746	Container with Most Water	2774
747	Parallel Courses II LeetCode Solution	2773
748	Count Minimum Steps to Get the given Array	2771
749	Deletion in a Binary Tree	2766
750	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2750
751	Delete Nodes and Return Forest Leetcode Solution	2747
752	Find the Difference Leetcode Solution	2737
753	Check if all levels of two Binary Tree are anagrams or not	2736
754	Nested List Weight Sum II LeetCode Solution	2734
755	Kill Process LeetCode Solution	2733
756	Level order traversal using two Queues	2731
757	Sum Root to Leaf Numbers LeetCode Solution	2730
758	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2730
759	Substring With Concatenation Of All Words	2730
760	Level of Each node in a Tree from source node	2728
761	Boundary Traversal of binary tree	2727
762	Rearrange an Array Such that arr[i] is equal to i	2726
763	Find Maximum of Minimum for Every Window Size in a Given Array	2718
764	Linked List Cycle	2715
765	Count pairs from two linked lists whose sum is equal to a given value	2714
766	Sort Array by Increasing Frequency Leetcode Solution	2709
767	Iterative Depth First Traversal of Graph	2709
768	Super Ugly Number	2708
769	Minimum Remove to Make Valid Parentheses LeetCode Solution	2706
770	Non-overlapping sum of two sets	2704
771	Minimum Size Subarray Sum	2704
772	Tree Traversal (Preorder, Inorder & Postorder)	2702
773	Matrix Chain Multiplication	2696
774	New 21 Game	2694
775	Longest Common Prefix Word by Word Matching	2689
776	Valid Anagrams	2688
777	Reorder Array Using Given Indexes	2688
778	Remove Duplicates from Sorted List II	2684
779	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2679
780	K maximum sums of overlapping contiguous sub-arrays	2677
781	Maximum size subarray sum equals k	2673
782	Merging Intervals	2672
783	Reservoir Sampling	2669
784	Range LCM Queries	2668
785	Merge K Sorted Linked Lists	2667
786	Palindrome Partitioning	2662
787	Check if any two intervals overlap among a given set of intervals	2661
788	Print a Binary Tree in Vertical Order	2655
789	Sorting a K Sorted Array	2647
790	Hamming Distance	2643
791	Flatten Binary Tree to Linked List LeetCode Solution	2640
792	Balanced Binary Tree	2638
793	Maximum Product Subarray	2637
794	The Painter’s Partition Problem	2636
795	Create Maximum Number	2628
796	Missing Number	2627
797	Peak Index in a Mountain Array LeetCode Solution	2626
798	Friends Of Appropriate Ages LeetCode Solution	2620
799	Maximum difference between two elements such as larger element comes after smaller	2618
800	Check if a queue can be sorted into another queue using a stack	2615
801	Verify Preorder Serialization of a Binary Tree	2615
802	Check if Two Expressions With Brackets are Same	2613
803	Lowest Common Ancestor	2613
804	Find Maximum Sum Possible Equal Sum of Three Stacks	2611
805	Valid Triangle Number LeetCode Solution	2610
806	Defanging an IP Address LeetCode Solution	2610
807	Iterative Postorder Traversal Using Two Stacks	2607
808	Find Three Element From Different Three Arrays Such That a + b + c = sum	2599
809	Valid Triangle Number LeetCode Solution	2593
810	Unique Binary Search Trees LeetCode Solution	2590
811	Smallest Range II Leetcode Solution	2590
812	Find Sum of all unique sub-array sum for a given array	2589
813	Find Element Using Binary Search in Sorted Array	2587
814	Minimum insertions to form a palindrome with permutations allowed	2586
815	Check if a given array can represent Preorder Traversal of Binary Search Tree	2585
816	Vertical sum in a given binary tree	2584
817	Sort Elements by Frequency II	2582
818	Count number of triplets with product equal to given number	2581
819	Find subarray with given sum (Handles Negative Numbers)	2574
820	Largest Submatrix With Rearrangements LeetCode Solution	2567
821	Newman-Conway Sequence	2567
822	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2565
823	Check if two nodes are on the same path in a Tree	2565
824	Find K Length Subarray of Maximum Average	2565
825	Minimum Distance Between BST Nodes Leetcode Solution	2564
826	Find distance between two nodes of a Binary Tree	2563
827	Number Of Longest Increasing Subsequence	2559
828	Merging Two Sorted Arrays	2558
829	Find Common Characters Leetcode Solution	2548
830	First Bad Version	2543
831	Check Completeness of a Binary Tree LeetCode Solution	2541
832	Third Maximum Number Leetcode Solution	2540
833	Maximum subsequence sum such that no three are consecutive	2534
834	Flatten 2D Vector LeetCode Solution	2533
835	Segment Tree	2532
836	Print all triplets in sorted array that form AP	2531
837	Find Peak Element	2527
838	Longest Bitonic Subsequence	2525
839	Arrange given numbers to form the biggest number	2523
840	Lower Case To Upper Case	2523
841	Maximum number of segments of lengths a, b and c	2522
842	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2521
843	Print All Distinct Elements of a Given Integer Array	2521
844	Closest Leaf in a Binary Tree LeetCode Solution	2520
845	Products of ranges in an array	2520
846	Employee Importance LeetCode Solution	2518
847	Largest subarray with equal number of 0s and 1s	2517
848	Range Sum Query using Sparse Table	2514
849	Array Nesting Leetcode Solution	2511
850	Find Smallest Range Containing Elements from k Lists	2510
851	Diagonal Traversal of Binary Tree	2509
852	Valid Parenthesis String	2503
853	Stone Game IV LeetCode Solution	2501
854	Find Nth Node	2501
855	Median of Two Sorted Arrays	2498
856	Trapping Rain Water II LeetCode Solution	2490
857	Distinct Subsequences	2490
858	Contiguous Array	2488
859	Longest Palindromic Subsequence	2488
860	Print Right View of a Binary Tree	2484
861	Largest BST Subtree LeetCode Solution	2478
862	Bottom View of a Binary Tree	2476
863	Maximum Population Year LeetCode Solution	2472
864	Write a function to get the intersection point of two Linked Lists	2469
865	Largest divisible pairs subset	2466
866	Shuffle an Array	2466
867	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2465
868	Path Sum	2462
869	Four Elements that Sum to Given	2461
870	Number of siblings of a given Node in n-ary Tree	2456
871	Stone Game IV LeetCode Solution	2450
872	Count and Say	2446
873	Isomorphic Strings	2446
874	Binary array after M range toggle operations	2445
875	Subset Sum Problem in O(sum) space	2442
876	Find the largest multiple of 3	2442
877	Infix to Postfix	2441
878	Unique Binary Search Trees	2440
879	Merge Two Sorted Arrays	2439
880	Permutations of a Given String Using STL	2427
881	Red-Black Tree Introduction	2426
882	Next Greater Element in an Array	2420
883	Height of a generic tree from parent array	2413
884	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2408
885	Friends Pairing Problem	2407
886	Find Largest d in Array such that a + b + c = d	2403
887	Valid Perfect Square LeetCode Solution	2396
888	Closest Binary Search Tree Value Leetcode Solution	2395
889	The Number of Weak Characters in the Game LeetCode Solution	2394
890	Maximum Product Subarray	2394
891	Valid Number	2392
892	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2384
893	Encoded String With Shortest Length LeetCode Solution	2384
894	Sentence Screen Fitting LeetCode Solution	2382
895	Count Primes in Ranges	2382
896	Averages of Levels in Binary Tree	2375
897	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2374
898	Insert Delete GetRandom	2371
899	Transform a BST to Greater sum Tree	2363
900	Find unique character in a string	2362
901	Maximum Sum of 3 Non-Overlapping Subarrays	2360
902	Shuffle a given Array	2360
903	Binary Search Tree Delete Operation	2355
904	Edit Distance	2353
905	Range Minimum Query (Square Root Decomposition and Sparse Table)	2352
906	Print n terms of Newman-Conway Sequence	2348
907	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2335
908	Integer to Roman	2334
909	Binary Tree Longest Consecutive Sequence LeetCode Solution	2330
910	Convert BST into a Min-Heap without using array	2326
911	Orderly Queue LeetCode Solution	2325
912	Reorganize String	2325
913	Minimum sum of squares of character counts in a given string after removing k characters	2323
914	Serialize and Deserialize Binary Tree LeetCode Solution	2321
915	Serialize and Deserialize Binary Tree	2315
916	Find Minimum In Rotated Sorted Array	2308
917	Maximum Product Subarray	2307
918	Lowest Common Ancestor in Binary Search Tree	2305
919	Kth Smallest Number in Multiplication Table Leetcode Solution	2303
920	Range Queries for Longest Correct Bracket Subsequence	2302
921	Bold Words in String LeetCode Solution	2298
922	Next greater element	2297
923	Swap Nodes In Pairs	2295
924	Koko Eating Bananas LeetCode Solution	2290
925	Array Queries for multiply replacements and product	2287
926	Diameter of N-Ary Tree LeetCode Solution	2285
927	Find the smallest binary digit multiple of given number	2280
928	K’th Largest element in BST using constant extra space	2274
929	Maximum Sum Increasing Subsequence	2272
930	K’th Largest Element in BST when modification to BST is not allowed	2267
931	Advantages of BST over Hash Table	2258
932	Constant time range add operation on an array	2255
933	Moving Stones Until Consecutive Leetcode Solution	2254
934	Write Code to Determine if Two Trees are Identical	2251
935	Insert into a Sorted Circular Linked List LeetCode Solution	2245
936	Next Greater Element II LeetCode Solution	2241
937	Best Meeting Point LeetCode Solution	2235
938	Valid Tic-Tac-Toe State LeetCode Solution	2233
939	Design Underground System Leetcode Solution	2229
940	Check if an Array is Stack Sortable	2228
941	Power of Two	2219
942	Queries on XOR of greatest odd divisor of the range	2218
943	Longest Increasing Consecutive Subsequence	2217
944	Total Hamming Distance LeetCode Solution	2216
945	Level Order Traversal of Binary Tree	2207
946	Number of Orders in the Backlog Leetcode Solution	2206
947	Numbers with prime frequencies greater than or equal to k	2205
948	Reverse a Path in BST using Queue	2201
949	Check if each internal node of a BST has exactly one child	2198
950	Find the node with minimum value in a Binary Search Tree	2198
951	Number of elements less than or equal to a given number in a given subarray	2197
952	Clone a Binary Tree with Random Pointers	2196
953	Check if X can give change to every person in the Queue	2195
954	Count the Pairs at Same Distance as in English Alphabets	2194
955	Form minimum number from given sequence	2190
956	Greatest Sum Divisible by Three LeetCode Solution	2189
957	Image Overlap LeetCode Solution	2186
958	Maximum Array from Two given Arrays Keeping Order Same	2183
959	A program to check if a binary tree is BST or not	2183
960	Find minimum number of merge operations to make an array palindrome	2181
961	Count and Toggle Queries on a Binary Array	2175
962	Graph Cloning	2174
963	Design Add and Search Words Data Structure LeetCode Solution	2173
964	Collect maximum points in a grid using two traversals	2171
965	Factorial Trailing Zeroes LeetCode Solution	2164
966	Closest Binary Search Tree Value II LeetCode Solution	2160
967	Merge Sort	2155
968	Print Next Greater Number of Q queries	2154
969	Merge two BSTs with limited extra space	2145
970	Largest Plus Sign Leetcode Solution	2143
971	Queries for Decimal Values of Subarrays of a Binary Array	2143
972	Form Minimum Number From Given Sequence	2143
973	Check for Palindrome after every character replacement Query	2142
974	Maximum difference between first and last indexes of an element in array	2141
975	Merge Sorted Array	2133
976	Group Shifted Strings Leetcode Solution	2131
977	Dividing Array into Pairs With Sum Divisible by K	2126
978	Priority Queue	2117
979	Print Ancestors of a Given Binary Tree Node Without Recursion	2103
980	Longest Substring Without Repeating Characters Leetcode Solution	2100
981	Print modified array after multiple array range increment operations	2100
982	Print all Possible Ways to Break a String in Bracket Form	2093
983	Count even length binary sequences with same sum of first and second half bits	2091
984	Excel Sheet Column Number LeetCode Solution	2090
985	Palindrome Partitioning	2087
986	Guess The Word	2087
987	Binary Search Tree	2083
988	Cutting a Rod	2081
989	Swim in Rising Water LeetCode Solution	2075
990	Kth Smallest Element in a BST	2072
991	Minimum Moves to Equal Array Elements LeetCode Solution	2070
992	Find postorder traversal of BST from preorder traversal	2062
993	Excel Sheet Column Title LeetCode Solution	2053
994	Find maximum average subarray of k length	2045
995	Count Pairs Whose Products Exist in Array	2041
996	How to print maximum number of A’s using given four keys	2037
997	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	2036
998	Unique Paths II	2034
999	Binary Search Tree Search and Insertion	2019
1000	Regular Expression Matching	2017
1001	Sum of Left Leaves LeetCode Solution	2016
1002	Check given array of size n can represent BST of n levels or not	2013
1003	Longest Common Prefix using Character by Character Matching	2012
1004	K Empty Slots	2007
1005	Decrease Elements To Make Array Zigzag LeetCode Solution	1978
1006	Sorted Array to Balanced BST	1976
1007	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1967
1008	Queries for Number of Distinct Elements in a Subarray	1960
1009	Maximum Depth Of Binary Tree	1945
1010	Construct Complete Binary Tree from its Linked List Representation	1939
1011	Iterative method to find ancestors of a given binary tree	1938
1012	Find the Town Judge LeetCode Solution	1934
1013	Shortest Unsorted Continuous Subarray LeetCode Solution	1920
1014	Maximum weight transformation of a given string	1911
1015	Find Maximum Depth of Nested Parenthesis in a String	1896
1016	Binary Tree to Binary Search Tree Conversion using STL set	1895
1017	Symmetric Tree LeetCode Solution Leetcode Solution	1888
1018	Data Structure Designing	1871
1019	Random Pick Index LeetCode Solution	1867
1020	Search in Sorted Rotated Array	1867
1021	Search an Element in Sorted Rotated Array	1823
1022	Next Greater Element I Leetcode Solution	1812
1023	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1809
1024	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1807
1025	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1801
1026	Print Maximum Length Chain of Pairs	1773
1027	Flatten Binary Tree to Linked List LeetCode Solution	1768
1028	Maximum Binary Tree	1749
1029	Peeking Iterator LeetCode Solution	1720
1030	Find k-th smallest element in BST (Order Statistics in BST)	1703
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1668