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	43523
2	Maximum occurring character in a string	19706
3	Plus One Leetcode Solution	19222
4	Valid Parentheses LeetCode Solution	19143
5	3Sum Leetcode Solution	17066
6	Merge Sorted Arrays Leetcode Solution	15236
7	First Repeating Element	15115
8	Single Number Leetcode Solution	14810
9	Count Primes Leetcode Solutions	14625
10	Pow(x, n) Leetcode Solution	14255
11	Sqrt(x) Leetcode Solution	14105
12	Meeting Rooms II LeetCode Solution	13192
13	Concatenation of Array LeetCode Solution	12734
14	Roman to Integer Leetcode Solution	11916
15	Valid Palindrome Leetcode Solution	11798
16	Contains Duplicate II Leetcode Solution	11720
17	Search Insert Position Leetcode Solution	11716
18	Palindrome Number LeetCode Solution	11526
19	Remove Duplicates from Sorted Array Leetcode Solution	11406
20	Jump Game Leetcode Solution	11135
21	Reverse Vowels of a String Leetcode Solution	11122
22	Intersection of Two Arrays II Leetcode Solution	11012
23	Longest Substring Without Repeating Characters LeetCode Solution	10989
24	Number of Good Pairs Leetcode Solution	10863
25	Spiral Matrix LeetCode Solution	10800
26	Kids With the Greatest Number of Candies Leetcode Solution	10732
27	House Robber Leetcode Solution	10679
28	Add Binary Leetcode Solution	10577
29	Maximum Subarray Leetcode Solution	10199
30	Number Of 1 bits	10032
31	Find the Maximum Repeating Number in Array	9918
32	Text Justification LeetCode Solution	9801
33	Move Zeroes LeetCode Solution	9749
34	Jewels and Stones Leetcode Solution	9709
35	Min Stack Leetcode Solution	9584
36	Power of Two Leetcode Solution	9512
37	Longest Palindromic Substring LeetCode Solution	9457
38	Shuffle String Leetcode Solution	9404
39	Permutations Leetcode Solution	9345
40	Evaluation of Postfix Expression	9259
41	Third Maximum Number Leetcode Solution	9252
42	Find All Numbers Disappeared in an Array Leetcode Solution	9214
43	Word Search Leetcode Solution	9213
44	Daily Temperatures Leetcode Solution	9196
45	Median of Two Sorted Arrays LeetCode Solution	9132
46	Next Permutation Leetcode Solution	9124
47	Search in Rotated Sorted Array Leetcode Solution	9065
48	Number of Islands LeetCode Solution	8998
49	Maximum Profit in Job Scheduling Leetcode Solution	8955
50	Kth Missing Positive Number Leetcode Solution	8948
51	Longest Common Prefix Leetcode Solution	8891
52	Next Greater Element I Leetcode Solution	8870
53	Frog Jump Leetcode Solution	8706
54	Valid Anagram Leetcode Solution	8584
55	Find Minimum Distance Between Two Numbers in an Array	8550
56	Rotate Image LeetCode Solution	8492
57	Running Sum of 1d Array Leetcode Solution	8478
58	Shuffle the Array Leetcode Solution	8448
59	Multiply Strings Leetcode Solution	8434
60	Can Place Flowers LeetCode Solution	8400
61	Combination Sum Leetcode Solution	8390
62	Count and Say Leetcode Solution	8369
63	House Robber II Leetcode Solution	8339
64	3Sum Closest LeetCode Solution	8274
65	Bulb Switcher LeetCode Solution	8259
66	Koko Eating Bananas Leetcode Solution	8095
67	Best Time to Buy and Sell Stock LeetCode Solution	8083
68	Excel Sheet Column Title Leetcode Solution	8061
69	Happy Number Leetcode Solution	8033
70	Isomorphic Strings Leetcode Solution	8013
71	Subarray and Subsequence	8000
72	Majority Element Leetcode Solution	7919
73	Count Pairs With Given Sum	7894
74	Integer to Roman Leetcode Solution	7863
75	Missing Number Leetcode Solution	7856
76	Candy LeetCode Solution	7844
77	Product of array except self	7839
78	Rotate String LeetCode Solution	7795
79	Strobogrammatic Number LeetCode Solution	7754
80	A Product Array Puzzle	7708
81	Reverse String Without Temporary Variable	7665
82	Is Subsequence Leetcode Solution	7634
83	Find the Difference Leetcode Solution	7608
84	Find the Duplicate Number LeetCode Solution	7593
85	Binary Search LeetCode Solution	7576
86	Expression Evaluation	7569
87	Find Common Characters Leetcode Solution	7533
88	Largest Number Leetcode Solution	7524
89	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7442
90	String to Integer (atoi) LeetCode Solution	7381
91	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7365
92	Subset Leetcode	7331
93	Summary Ranges Leetcode Solution	7281
94	Set Matrix Zeroes	7269
95	Rabin Karp Algorithm	7249
96	Word Pattern LeetCode Solution	7214
97	Sort Characters By Frequency LeetCode Solution	7206
98	Balanced Binary Tree Leetcode Solution	7175
99	Find the Town Judge Leetcode Solution	7137
100	Arranging Coins Leetcode Solution	7087
101	Unique Paths Leetcode Solution	7079
102	Find the Winner of the Circular Game LeetCode Solution	7065
103	Rearrange Positive and Negative Numbers Alternatively in Array	6983
104	String Compression LeetCode Solution	6972
105	Asteroid Collision LeetCode Solution	6945
106	Group Anagrams LeetCode Solution	6928
107	Postfix to Infix Conversion	6902
108	Repeated Substring Pattern LeetCode Solution	6876
109	Page Replacement Algorithms in Operating Systems	6847
110	Smallest window in a string containing all characters of another string	6829
111	Sort Colors LeetCode Solution	6787
112	Matrix Chain Multiplication using Dynamic Programming	6778
113	Best Time to Buy and Sell Stock II Leetcode Solution	6758
114	Sort Array By Parity LeetCode Solution	6639
115	Zigzag Conversion LeetCode Solution	6628
116	Divide Two Integers Leetcode Solution	6596
117	Generate Parentheses Leetcode Solution	6585
118	Kth largest element in an Array Leetcode Solutions	6576
119	Valid Palindrome II Leetcode Solution	6571
120	Sum of minimum and maximum elements of all subarrays of size k	6560
121	Assign Cookies Leetcode Solution	6485
122	Reverse Integer Leetcode Solution	6458
123	Remove Duplicates from Sorted Array II Leetcode Solution	6452
124	Length of Last Word Leetcode Solution	6419
125	Product of Array Except Self LeetCode Solution	6415
126	Decode String Leetcode Solution	6408
127	Find the Row with Maximum Number of 1’s	6405
128	Pascal Triangle Leetcode	6353
129	Bus Routes Leetcode Solution	6345
130	H-Index Leetcode Solution	6343
131	Number of Provinces Leetcode Solution	6334
132	Merge Two Sorted Lists Leetcode Solutions	6316
133	Linked List Cycle II LeetCode Solution	6242
134	Convert array into Zig-Zag fashion	6233
135	Minimum Cost For Tickets Leetcode Solution	6225
136	Minimum Steps to reach target by a Knight	6224
137	Defanging an IP Address Leetcode Solution	6216
138	Prefix to Infix Conversion	6211
139	Optimal Account Balancing LeetCode Solution	6205
140	Employee Free Time LeetCode Solution	6196
141	Pascal’s Triangle II Leetcode Solution	6110
142	Find First and Last Position of Element in Sorted Array Leetcode Solution	6069
143	Increasing Triplet Subsequence LeetCode Solution	6043
144	First element occurring k times in an array	6042
145	Merge Sorted Array LeetCode Solution	6013
146	Build Array From Permutation Leetcode Solution	6005
147	Implementation of Deque using Doubly Linked List	6001
148	Majority Element II Leetcode Solution	5977
149	Island Perimeter Leetcode Solution	5976
150	Robot Room Cleaner Leetcode Solution	5955
151	Max Consecutive Ones Leetcode Solution	5911
152	Bellman Ford Algorithm	5906
153	Swap Nodes in Pairs Leetcode Solutions	5862
154	Find Pair with Given Difference	5862
155	Check if the Elements of an Array are Consecutive	5854
156	OSI Model	5851
157	Set Matrix Zeroes Leetcode Solution	5844
158	Guess Number Higher or Lower LeetCode Solution	5829
159	K-th Smallest Element in a Sorted Matrix	5818
160	KMP Algorithm	5811
161	Add Two Numbers II Leetcode Solution	5805
162	Find the Missing Number	5783
163	Fibonacci Number LeetCode Solution	5765
164	First negative integer in every window of size k	5760
165	Trapping Rain Water Leetcode Solution	5748
166	Lemonade Change Leetcode Solution	5744
167	Subarray Sum Equals K LeetCode Solution	5743
168	Design Parking System Leetcode Solution	5733
169	Delete middle element of a stack	5701
170	First Unique Character in a String LeetCode Solution	5695
171	Word Ladder LeetCode Solution	5674
172	Find All Duplicates in an Array LeetCode Solution	5653
173	Coin Change 2 Leetcode Solution	5650
174	Length of the largest subarray with contiguous elements	5641
175	String Compression	5641
176	Subarray Product Less Than K LeetCode Solution	5639
177	Last Stone Weight	5638
178	Monotonic Array LeetCode Solution	5628
179	Subarray with Given Sum	5628
180	Capacity To Ship Packages Within D Days Leetcode Solution	5626
181	Palindrome Linked List Leetcode Solution	5601
182	Repeated Substring Pattern	5550
183	Form Minimum Number from Given Sequence of D’s and I’s	5528
184	Find Smallest Missing Number in a Sorted Array	5528
185	Single Element in a Sorted Array LeetCode Solution	5512
186	Combinations Leetcode Solution	5484
187	01 Matrix LeetCode Solution	5482
188	Remove Duplicates from Sorted List II LeetCode Solution	5476
189	Prefix to Postfix Conversion	5466
190	Continuous Subarray Sum LeetCode Solution	5427
191	Reverse Words in a String III LeetCode Solution	5415
192	Valid Perfect Square Leetcode Solution	5412
193	Iterative Implementation of Quick Sort	5388
194	Same Tree LeetCode Solution	5379
195	Break a Palindrome LeetCode Solution	5367
196	Combination Sum	5365
197	Leetcode Permutations	5338
198	Merge k Sorted Lists Leetcode Solution	5329
199	Remove Linked List Elements Leetcode Solution	5314
200	Slowest Key Leetcode Solution	5286
201	Top K Frequent Elements LeetCode Solution	5276
202	Relative Ranks Leetcode Solution	5273
203	Backspace String Compare	5269
204	Maximum Product of Three Numbers LeetCode Solution	5250
205	Rotate List Leetcode Solution	5239
206	Insert Delete GetRandom O(1) Leetcode Solution	5234
207	Container With Most Water LeetCode Solution	5229
208	Find Peak Element LeetCode Solution	5216
209	Find the Duplicate Element	5199
210	Contains Duplicate LeetCode Solution	5186
211	The K Weakest Rows in a Matrix Leetcode Solution	5167
212	Boolean Parenthesization Problem	5167
213	Printing brackets in Matrix Chain Multiplication Problem	5142
214	Cuckoo sequence program	5133
215	Second Most Repeated Word in a Sequence	5110
216	Longest Common Subsequence LeetCode Solution	5107
217	Palindrome Number	5098
218	Kth Largest Element in a Stream Leetcode Solution	5091
219	Subarray Sum Equals k	5075
220	Remove All Occurrences of a Substring LeetCode Solution	5059
221	Permutation in String Leetcode Solution	5042
222	Relative Sort Array Leetcode Solution	5040
223	Rearrange given Array in Maximum Minimum Form	5037
224	Make The String Great Leetcode Solution	5035
225	Max Area of Island	5017
226	Find Leaders in an Array	5011
227	Unique Paths II Leetcode Solution	5008
228	Arithmetic Expression Evaluation	5001
229	Generate all Binary Strings Without Consecutive 1’s	4999
230	Convert a Number to Hexadecimal Leetcode Solution	4995
231	Delete Node in a Linked List Leetcode Solution	4982
232	Target Sum	4970
233	Check If Two String Arrays are Equivalent Leetcode Solution	4960
234	Construct Binary Tree from Given Inorder and Preorder Traversals	4954
235	N-Queens LeetCode Solution	4949
236	Moving Average from Data Stream Leetcode Solution	4947
237	Time Based Key-Value Store LeetCode Solution	4938
238	Scramble String	4926
239	Letter Combinations of a Phone Number	4910
240	Count Good Nodes in Binary Tree Leetcode Solution	4904
241	Next Permutation	4904
242	Number of Dice Rolls With Target Sum LeetCode Solution	4903
243	LRU Cache LeetCode Solution	4890
244	Find N Unique Integers Sum up to Zero Leetcode Solution	4856
245	Check If N and Its Double Exist Leetcode Solution	4855
246	Stone Game LeetCode	4847
247	Given two unsorted arrays find all pairs whose sum is x	4846
248	Find Triplet in Array With a Given Sum	4835
249	Number of Steps to Reduce a Number to Zero Leetcode Solution	4801
250	Flipping an Image LeetCode Solution	4798
251	Prim’s Algorithm	4780
252	Minimum swaps required to bring all elements less than or equal to k together	4773
253	Reverse Only Letters LeetCode Solution	4749
254	Top K Frequent Elements	4749
255	Remove Minimum Characters so that Two Strings Become Anagrams	4747
256	Find The Duplicate Number	4738
257	Stock Buy Sell to Maximize Profit	4735
258	Min Cost Climbing Stairs LeetCode Solution	4725
259	Minimum Knight Moves LeetCode Solution	4716
260	Min Stack	4715
261	Student Attendance Record I Leetcode Solution	4712
262	Minimum Operations to convert X to Y	4657
263	To Lower Case Leetcode Solution	4656
264	Single Number	4651
265	Maximum Sum Increasing Subsequence	4648
266	Smallest Positive Number Missing in an Unsorted Array	4646
267	The kth Factor of n Leetcode Solution	4636
268	Maximum Subarray Sum using Divide and Conquer	4626
269	Reverse words in a string	4614
270	License Key Formatting Leetcode Solution	4613
271	Maximum Population Year LeetCode Solution	4599
272	Longest Common Subsequence	4542
273	Search Suggestions System LeetCode Solution	4533
274	Remove Nth Node From End of List Leetcode Solution	4531
275	Top K Frequent Words LeetCode Solution	4524
276	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4516
277	Find the Number Occurring Odd Number of Times in an Array	4507
278	Reformat Date LeetCode Solution	4501
279	Sum of Subarray Ranges Leetcode Solution	4491
280	Find Words That Can Be Formed by Characters Leetcode Solution	4484
281	BFS for Disconnected Graph	4479
282	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4446
283	Minimum Path Sum Leetcode Solution	4446
284	Maximum Depth of Binary Tree Leetcode Solution	4434
285	Reveal Cards In Increasing Order Leetcode Solution	4412
286	N-th Tribonacci Number Leetcode Solution	4410
287	Intersection of Two Arrays	4387
288	Diagonal Traverse LeetCode Solution	4377
289	Reverse individual words	4373
290	House Robber	4372
291	Evaluate Division	4361
292	Best Time to Buy and Sell Stock III Leetcode Solution	4354
293	Maximize Distance to Closest Person LeetCode Solution	4352
294	Find any one of the multiple repeating elements in read only array	4350
295	Last Stone Weight II LeetCode Solution	4349
296	Minimum Characters to be Added at Front to Make String Palindrome	4343
297	Design A Leaderboard Leetcode Solution	4321
298	Remove Duplicates from Sorted List LeetCode Solution	4318
299	Sort Elements by Frequency of Occurrences	4318
300	Binary Tree Inorder Traversal LeetCode Solution	4317
301	Find if Path Exists in Graph Leetcode Solution	4316
302	Maximum Size Subarray Sum Equals k Leetcode Solution	4315
303	Count of index pairs with equal elements in an array	4307
304	Count Number of Occurrences in a Sorted Array	4306
305	Length of Longest valid Substring	4288
306	Range Sum Query 2D – Immutable Leetcode Solution	4285
307	Reverse Nodes in k-Group LeetCode Solution	4273
308	Most Frequent Element in an Array	4266
309	Minimum number of Merge Operations to make an Array Palindrome	4254
310	Implement a stack using single queue	4241
311	Sudoku Solver	4238
312	Remove All Ones With Row and Column Flips Leetcode Solution	4237
313	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4218
314	Brightest Position on Street LeetCode Solution	4207
315	Mobile Numeric Keypad Problem	4201
316	Find the Closest Palindrome number	4200
317	Spiral Matrix II Leetcode Solution	4191
318	Split Linked List in Parts Leetcode Solution	4178
319	Find Leaves of Binary Tree LeetCode Solution	4177
320	Reverse Bits	4171
321	Special Positions in a Binary Matrix Leetcode Solution	4170
322	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4162
323	Invalid Transactions LeetCode Solution	4149
324	Symmetric Tree Leetcode Solution	4138
325	Paint House LeetCode Solution	4131
326	Shortest Word Distance Leetcode Solution	4131
327	Maximum Subarray	4127
328	Sort Array By Parity II Leetcode Solution	4105
329	Arrange given Numbers to Form the Biggest Number II	4097
330	Diagonal Traversal LeetCode Solution	4081
331	Round Robin Scheduling	4075
332	Find Duplicates in an Array in Most Efficient Way	4075
333	One Edit Distance LeetCode Solution	4074
334	Largest Rectangle in Histogram LeetCode Solution	4061
335	Remove Invalid Parentheses Leetcode Solution	4044
336	Dijkstra Algorithm	4044
337	Rank Transform of an Array Leetcode Solution	4039
338	Hamming Distance Leetcode Solution	4037
339	Jump Game	4031
340	Partition Labels LeetCode Solution	4025
341	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4024
342	Alien Dictionary LeetCode Solution	4023
343	Unique Paths	4020
344	Tug of War	4001
345	Maximal Square	3997
346	Minimum Moves to Equal Array Elements Leetcode Solution	3996
347	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3984
348	String Matching in an Array Leetcode Solution	3978
349	Find Winner on a Tic Tac Toe Game Leetcode Solution	3972
350	Construct BST from its given Level Order Traversal	3967
351	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3964
352	Range Sum of BST LeetCode Solution	3963
353	The Celebrity Problem	3963
354	Next Permutation LeetCode Solution	3959
355	Minimum operation to make all elements equal in array	3956
356	Bitwise AND of Numbers Range LeetCode Solution	3950
357	Least Number of Unique Integers after K Removals Leetcode Solution	3947
358	Minimum Depth of Binary Tree Leetcode Solution	3940
359	Merge Two Sorted Linked Lists	3926
360	Longest Common Prefix using Trie	3925
361	Pair of Positive Negative Values in an Array	3924
362	Validate Stack Sequences LeetCode Solution	3923
363	Unique Paths III LeetCode Solution	3919
364	Postfix to Prefix Conversion	3915
365	Maximum Circular Subarray Sum	3912
366	Smallest Subarray with k Distinct Numbers	3911
367	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3910
368	Given an Array of Pairs Find all Symmetric Pairs in it	3905
369	Transpose Graph	3891
370	Check whether Strings are K Distance Apart or Not	3890
371	Minimum Time Visiting All Points Leetcode Solution	3889
372	Count of Triplets With Sum Less than Given Value	3884
373	Minimum Cost to Hire K Workers	3876
374	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3870
375	Substring with Concatenation of All Words Leetcode Solution	3869
376	Robot Bounded In Circle LeetCode Solution	3866
377	K Empty Slots LeetCode	3866
378	Next Greater Element III LeetCode Solution	3865
379	Invert Binary Tree LeetCode Solution	3863
380	Recursion	3859
381	Find minimum difference between any two elements	3857
382	Clone Graph LeetCode Solution	3854
383	Check if a given array contains duplicate elements within k distance from each other	3851
384	Longest Substring with At Most K Distinct Characters LeetCode Solution	3841
385	Ugly Number II LeetCode Solution	3840
386	Kruskal Algorithm	3831
387	Implementation of Deque using circular array	3828
388	Sort a stack using a temporary stack	3825
389	Regular Expression Matching Regular Expression Matching LeetCode Solution	3820
390	Minimize Maximum Pair Sum in Array LeetCode Solution	3812
391	Non-decreasing Array LeetCode Solution	3807
392	Invert Binary Tree LeetCode Solution	3795
393	Permutation Sequence LeetCode Solution	3793
394	Toeplitz Matrix	3789
395	Stack Permutations (Check if an array is stack permutation of other)	3787
396	Graph Valid Tree LeetCode Solution	3783
397	LRU Cache Implementation	3782
398	Longest subsequence such that difference between adjacents is one	3780
399	Find the subarray with least average	3779
400	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3778
401	Word Search	3769
402	Sliding Window Technique	3769
403	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3768
404	Kth Smallest Element in a BST Leetcode Solution	3763
405	Design Browser History LeetCode Solution	3760
406	Longest subarray not having more than K distinct elements	3760
407	3 Sum	3758
408	Find the First and Second Smallest Elements	3758
409	Missing Element in Sorted Array LeetCode Solution	3751
410	Find the Smallest Divisor given a Threshold Leetcode Solution	3743
411	Find duplicates in a given array when elements are not limited to a range	3739
412	Partition List Leetcode Solution	3730
413	Number of Islands II LeetCode Solution	3724
414	Priority Queue using doubly linked list	3721
415	Common elements in all rows of a given matrix	3718
416	Path With Maximum Minimum Value LeetCode Solution	3716
417	Find Top K (or Most Frequent) Numbers in a Stream	3715
418	Queries for counts of array elements with values in given range	3713
419	Number Complement Leetcode Solution	3711
420	Stone Game II Leetcode	3709
421	First Circular Tour to Visit all the Petrol Bunks	3707
422	K Closest Points to Origin Leetcode Solution	3706
423	Top View of Binary Tree	3701
424	Number of Smaller Elements on Right Side	3699
425	Minesweeper LeetCode Solution	3697
426	Max stack	3696
427	Find Maximum Level sum in Binary Tree	3696
428	Search a 2D Matrix II Leetcode Solution	3688
429	Maximum Number of Occurrences of a Substring Leetcode Solution	3687
430	Sequences of given length where every element is more than or equal to twice of previous	3687
431	LRU Cache Leetcode Solution	3679
432	Combination Sum IV LeetCode Solution	3679
433	Find the Peak Element from an Array	3678
434	Integer Break LeetCode Solution	3675
435	Snakes and Ladders LeetCode Solution	3668
436	Nth Catalan Number	3668
437	High Five LeetCode Solution	3660
438	Painting Fence Algorithm	3659
439	Can Make Arithmetic Progression From Sequence Leetcode Solution	3657
440	Sort elements by frequency	3650
441	Longest Palindrome can be Formed by Removing or Rearranging Characters	3636
442	Odd Even Linked List Leetcode Solution	3633
443	Insert Interval Leetcode Solution	3628
444	Find Minimum in Rotated Sorted Array II LeetCode Solution	3623
445	Maximum Consecutive Numbers Present in an Array	3617
446	Fibonacci Number LeetCode Solution	3616
447	Rearrange array such that even positioned are greater than odd	3615
448	Check if Two given Strings are Isomorphic to each other	3615
449	Flood Fill LeetCode	3613
450	Shortest Palindrome	3611
451	Sliding Window Maximum LeetCode Solution	3606
452	Consecutive Characters LeetCode Solution	3605
453	4Sum	3602
454	Search in a Binary Search Tree Leetcode Solution	3599
455	Distance of nearest cell having 1 in a binary matrix	3592
456	Count items common to both the lists but with different prices	3586
457	Design a stack that supports getMin() in O(1) time and O(1) extra space	3574
458	Tiling Problem	3574
459	Move All the Zeros to the End of the Given Array	3571
460	Gold Mine Problem	3557
461	Number of Closed Islands Leetcode Solution	3555
462	Expression Contains Redundant Bracket or Not	3554
463	Spiral Matrix III LeetCode Solution	3552
464	Kth Non-repeating Character	3552
465	Replace Elements with Greatest Element on Right Side Leetcode Solution	3550
466	Insert into a Binary Search Tree Leetcode Solution	3549
467	Minimum Absolute Difference in BST Leetcode Solution	3543
468	Find a Peak Element II LeetCode Solution	3538
469	Coin Change Problem	3524
470	Queries for GCD of all numbers of an array except elements in a given range	3521
471	Check If Array Pairs Are Divisible by k LeetCode Solution	3520
472	Integer to English words	3519
473	Minimum Path Sum	3515
474	N queen problem	3515
475	Sliding Window Median Leetcode Solution	3511
476	Decompress Run-Length Encoded List Leetcode Solution	3511
477	Evaluate Reverse Polish Notation LeetCode Solution	3508
478	Restore IP Addresses Leetcode Solution	3507
479	Trapping Rain Water LeetCode Solution	3505
480	Longest Common Prefix using Sorting	3501
481	Interval Tree	3494
482	Convert Sorted Array to Binary Search Tree Leetcode Solution	3489
483	Balanced Expression with Replacement	3487
484	Find All Possible Recipes from Given Supplies LeetCode Solution	3482
485	Sorting array using Stacks	3479
486	Sort an array according to the order defined by another array	3479
487	Sort Colors	3475
488	Binary Tree Maximum Path Sum LeetCode Solution	3474
489	Find Pythagorean Triplets from Array	3462
490	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3455
491	Majority Element	3454
492	Cells with Odd Values in a Matrix LeetCode Solution	3448
493	Best Time to Buy and Sell Stock	3444
494	Reverse a linked list	3444
495	Vertical Order Traversal of Binary Tree LeetCode Solution	3442
496	Palindrome Substring Queries	3436
497	Subset sum problem	3427
498	Number of Days Between Two Dates LeetCode Solution	3426
499	Priority Queue in C++	3423
500	The Stock Span Problem	3416
501	Find Median from Data Stream LeetCode Solution	3413
502	Fibonacci numbers	3411
503	Path Sum II LeetCode Solution	3408
504	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3406
505	Queue using Stacks	3401
506	Sieve of Eratosthenes	3399
507	Find the first Repeating Number in a Given Array	3395
508	Path Crossing Leetcode Solution	3392
509	Camelcase Matching Leetcode Solution	3385
510	Is Graph Bipartite? LeetCode Solution	3381
511	Intersection of Two Linked Lists LeetCode Solution	3374
512	Largest rectangular sub-matrix whose sum is 0	3374
513	Kth ancestor of a node in binary tree	3373
514	Multiplication of Two Matrices	3372
515	Design Hit Counter LeetCode Solution	3368
516	How to Implement Stack Using Priority Queue or Heap?	3362
517	Pancake Sorting Problem	3357
518	Divide Chocolate LeetCode Solution	3351
519	Longest Increasing Path in a Matrix LeetCode Solution	3351
520	Analyze User Website Visit Pattern LeetCode Solution	3350
521	Custom Sort String Leetcode Solution	3349
522	Shortest Completing Word Leetcode Solution	3349
523	Different Ways to Add Parentheses Leetcode Solution	3339
524	Monotonic Array Leetcode Solution	3336
525	Count Submatrices With All Ones LeetCode Solution	3332
526	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3327
527	Count subarrays having total distinct elements same as original array	3323
528	Group Anagrams	3320
529	Find a Fixed Point in a Given Array	3319
530	Scramble String LeetCode Solution	3310
531	Check if Array Contains Contiguous Integers With Duplicates Allowed	3310
532	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3307
533	Perfect Squares LeetCode Solution	3305
534	Detect a loop in the Linked List	3297
535	Generate all Binary Strings from Given Pattern	3293
536	Shifting Letters LeetCode Solution	3292
537	Merge Overlapping Intervals	3284
538	Queue based approach for first non-repeating character in a stream	3283
539	Minimum Height Trees	3282
540	Construction of Longest Increasing Subsequence (N log N)	3281
541	Implement Trie (Prefix Tree) Leetcode Solution	3279
542	Implement strStr() LeetCode Solution	3274
543	Valid Boomerang Leetcode Solution	3273
544	Number of Distinct Islands Leetcode Solution	3272
545	Nearest Exit from Entrance in Maze LeetCode Solution	3266
546	Decode Ways	3264
547	Reorder Data in Log Files LeetCode Solution	3258
548	How to Create Mergable Stack?	3258
549	Race Car LeetCode Solution	3254
550	Champagne Tower LeetCode Solution	3246
551	Sort a stack using recursion	3245
552	Sliding Window Maximum	3243
553	Morris Traversal	3240
554	Binary Tree zigzag level order Traversal	3240
555	Maximum Element in an Array which is Increasing and then Decreasing	3240
556	Longest Common Prefix using Divide and Conquer	3239
557	Maximum Sum of Non Consecutive Elements	3239
558	Find the Lost Element From a Duplicated Array	3234
559	Best Time to Buy and Sell Stock IV LeetCode Solution	3233
560	Number of Equivalent Domino Pairs Leetcode Solution	3229
561	LCS (Longest Common Subsequence) of three strings	3223
562	Insert Node in the Sorted Linked List	3221
563	Most Stones Removed with Same Row or Column LeetCode Solution	3220
564	Find if an Expression has Duplicate Parenthesis or Not	3219
565	Find maximum length Snake sequence	3212
566	Count Possible Triangles	3212
567	First missing positive	3211
568	Build an Array With Stack Operations Leetcode Solution	3210
569	Recover Binary Search Tree	3210
570	Palindrome Permutation LeetCode Solution	3207
571	Design Skiplist LeetCode Solution	3197
572	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3197
573	Letter Case Permutation	3196
574	Decode String	3195
575	Smallest Good Base	3191
576	Find a Sorted Subsequence of size 3	3190
577	Rectangle Overlap LeetCode Solution	3182
578	Minimum Bracket Reversals	3180
579	Merge Two Binary Trees LeetCode Solution	3175
580	Contiguous Array LeetCode Solution	3174
581	Longest Repeated Subsequence	3166
582	Distance Between Bus Stops Leetcode Solution	3165
583	Guess Number Higher or Lower II	3165
584	All Possible Full Binary Trees LeetCode Solution	3164
585	Longest Substring with At Least K Repeating Characters LeetCode Solution	3164
586	Largest Subarray with Equal Number of 0’s and 1’s	3155
587	Recover Binary Search Tree Leetcode Solution	3154
588	Palindrome Partitioning Leetcode Solution	3153
589	Find the Town Judge LeetCode Solution	3149
590	Maximum Length of Chain Pairs	3149
591	Maximum Depth of N-ary Tree Leetcode Solution	3148
592	Minimum Height Trees LeetCode Solution	3146
593	Print all Palindromic Partitions of a String	3145
594	Maximum Number of Ways to Partition an Array LeetCode Solution	3140
595	Find the two Numbers with Odd Occurrences in an Unsorted Array	3135
596	Minimum number of jumps to reach end	3134
597	Design a Stack With Increment Operation Leetcode Solution	3130
598	K-th Distinct Element in an Array	3125
599	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3115
600	Rearrange Spaces Between Words Leetcode Solution	3111
601	Check for Balanced Parentheses in an Expression	3106
602	Valid Parentheses Leetcode Solution	3105
603	The Maze III LeetCode Solution	3103
604	Reorder an Array According to the Given Indexes	3102
605	Implement Two Stacks in an Array	3101
606	Subarrays with K Different Integers Leetcode Solution	3094
607	Mean of Array After Removing Some Elements Leetcode Solution	3084
608	Maximize Elements Using Another Array	3082
609	Sort a String According to Another String	3082
610	Maximum Score After Splitting a String Leetcode Solution	3073
611	Jump Game IV LeetCode Solution	3061
612	Maximum sum rectangle in a 2D matrix	3057
613	Count pair with Given Sum	3054
614	Contains Duplicate	3048
615	Find the First Circular Tour that visits all the Petrol Pumps	3046
616	Valid Sudoku	3038
617	Perform String Shifts Leetcode	3038
618	Convert BST to Min Heap	3034
619	Word Break	3028
620	Possible Bipartition LeetCode Solution	3023
621	Edit Distance LeetCode Solution	3023
622	Minimum Jumps to Reach Home LeetCode Solution	3022
623	Iterative Method to find Height of Binary Tree	3016
624	Heap Sort	3015
625	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3011
626	A Space Optimized DP solution for 0-1 Knapsack Problem	3010
627	Palindrome Permutations of a String	3006
628	Find the Minimum Element in a Sorted and Rotated Array	3006
629	Find Largest Value in Each Tree Row LeetCode Solution	2993
630	Reach a Number LeetCode Solution	2983
631	Find First and Last Position of Element in Sorted Array LeetCode Solution	2979
632	Best Meeting Point LeetCode Solution	2977
633	Count Sub Islands LeetCode Solution	2973
634	Merge Overlapping Intervals II	2972
635	Maximum Product of Splitted Binary Tree LeetCode Solution	2970
636	Palindrome Permutation	2968
637	Palindromic Substrings Leetcode Solution	2966
638	Number of palindromic paths in a matrix	2964
639	Merge Two Balanced Binary Search Trees	2958
640	Find the Subarray of given length with Least Average	2948
641	My Calendar I LeetCode Solution	2947
642	Segregate 0s and 1s in an Array	2947
643	Sorted Linked List to Balanced BST	2945
644	All Unique Triplets that Sum up to a Given Value	2943
645	Caesar Cipher	2938
646	Huffman Coding	2933
647	Pair with given product	2932
648	Brick Wall LeetCode Solution	2926
649	Check if the given array can represent Level Order Traversal of Binary Search Tree	2922
650	Level order Traversal in Spiral Form	2920
651	Construct BST from given Preorder Traversal	2918
652	Find Median from data Stream	2916
653	Word Pattern	2913
654	Swapping Nodes in a Linked List Leetcode Solution	2912
655	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2901
656	Partition Problem	2897
657	Find all triplets with zero sum	2896
658	Merge K Sorted Arrays and Print Sorted Output	2879
659	Count Good Nodes in Binary Tree LeetCode Solution	2878
660	Maximize Sum of Array after K Negations Leetcode Solution	2873
661	Print Fibonacci sequence using 2 variables	2870
662	Validate Binary Search Tree	2866
663	Minimum time required to rot all oranges	2855
664	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2853
665	Add two numbers	2852
666	Alien Dictionary	2850
667	Isomorphic Strings LeetCode Solution	2848
668	Find whether a subarray is in form of a mountain or not	2848
669	Count Distinct Elements in Every Window of Size K	2846
670	Queries on Probability of Even or Odd Number in given Ranges	2841
671	Detect Capital Leetcode Solution	2840
672	Find all pairs (a, b) in an array such that a % b = k	2836
673	Sort 0s 1s and 2s in an Array	2835
674	Longest Subarray Having Count of 1s One More than Count of 0s	2834
675	Largest Sum Contiguous Subarray	2834
676	How to Efficiently Implement k Stacks in a Single Array?	2834
677	Convert Sorted List to Binary Search Tree	2834
678	Maximum Frequency Stack Leetcode Solution	2831
679	Bubble sort using two Stacks	2829
680	Split Array Into Consecutive Subsequences	2824
681	Range Sum Query 2D – Immutable LeetCode Solution	2823
682	Binary Tree Right Side View LeetCode Solution	2821
683	Counting Bits	2821
684	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2818
685	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2812
686	Find four elements that sum to a given value (Hashmap)	2811
687	Rotate Array	2808
688	Length of Longest Fibonacci Subsequence	2807
689	Breadth First Search (BFS) for a Graph	2804
690	Remove brackets from an algebraic string containing + and – operators	2802
691	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2796
692	Binary Tree to Binary Search Tree Conversion	2795
693	Minimum Swaps to Group All 1’s Together Leetcode Solution	2792
694	Maximum Number of Chocolates to be Distributed Equally Among k Students	2789
695	Count ways to reach the nth stair using step 1, 2 or 3	2785
696	Partition to K Equal Sum Subsets Leetcode Solution	2776
697	Print all subarrays with 0 sum	2768
698	Remove Palindromic Subsequences Leetcode Solution	2767
699	Merge Two Sorted Lists Leetcode	2767
700	Populating Next Right Pointers in Each Node	2762
701	Difference Array \| Range update query in O(1)	2758
702	Populating Next Right Pointers in Each Node Leetcode Solution	2749
703	Find pairs with given sum such that elements of pair are in different rows	2743
704	Partition Equal Subset Sum	2742
705	Topological Sorting	2742
706	Happy Number	2736
707	String comparison containing wildcards	2736
708	Minimum Sum Path in a Triangle	2735
709	Remove duplicates from sorted array	2735
710	Arithmetic Slices II – Subsequence LeetCode Solution	2732
711	Elements Appear more than N/K times in Array	2721
712	Contiguous Array Leetcode	2720
713	Check if a Linked list of Strings form a Palindrome	2719
714	Concatenation of Array LeetCode Solution	2718
715	Queue Reconstruction by Height	2715
716	Web Crawler LeetCode Solution	2713
717	Find All Pairs With a Given Difference	2710
718	Inorder Successor of a node in Binary Tree	2706
719	Find Duplicate Subtrees	2696
720	Root to Leaf path with target sum Leetcode Solutions	2684
721	Reverse Nodes in K-Group	2684
722	Increasing Subsequence of Length three with Maximum Product	2677
723	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2668
724	Check if String Follows Order of Characters by a Pattern or not	2667
725	Score of Parenthesis LeetCode Solution	2658
726	Finding K closest element	2658
727	Minimum Swaps to Make Strings Equal Leetcode Solution	2651
728	Swap Kth Node from beginning with Kth Node from End	2651
729	Symmetric Tree	2650
730	Given a binary tree, how do you remove all the half nodes?	2648
731	Maximum Distance in Array	2646
732	Pancake Sorting	2642
733	Longest Common Prefix Using Binary Search II	2641
734	Climbing stairs	2638
735	Longest Increasing Subsequence	2633
736	Container with Most Water	2633
737	Maximum Product Subarray II	2633
738	An Interesting Method to generate Binary Numbers from 1 to n	2632
739	Count Minimum Steps to Get the given Array	2631
740	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2629
741	Construct Binary Tree from given Parent Array representation	2629
742	Deletion in a Binary Tree	2618
743	Sum Root to Leaf Numbers LeetCode Solution	2609
744	Parallel Courses II LeetCode Solution	2607
745	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2607
746	Check if all levels of two Binary Tree are anagrams or not	2607
747	Find the first repeating element in an array of integers	2607
748	Delete Nodes and Return Forest Leetcode Solution	2605
749	Union and Intersection of two Linked Lists	2602
750	Delete Nth node from the end of the given linked list	2596
751	Substring With Concatenation Of All Words	2593
752	MiniMax Algorithm	2593
753	Boundary Traversal of binary tree	2588
754	Level order traversal using two Queues	2585
755	Kill Process LeetCode Solution	2583
756	Count pairs from two linked lists whose sum is equal to a given value	2582
757	Level of Each node in a Tree from source node	2575
758	BFS vs DFS for Binary Tree	2570
759	Sort Array by Increasing Frequency Leetcode Solution	2569
760	Non-overlapping sum of two sets	2569
761	Iterative Depth First Traversal of Graph	2567
762	Minimum Size Subarray Sum	2567
763	Linked List Cycle	2564
764	Find K Closest Elements LeetCode Solution	2563
765	Valid Anagrams	2560
766	Rearrange an Array Such that arr[i] is equal to i	2558
767	Merge K Sorted Linked Lists	2558
768	Find Maximum of Minimum for Every Window Size in a Given Array	2550
769	Minimum Remove to Make Valid Parentheses LeetCode Solution	2549
770	New 21 Game	2545
771	Iterative Preorder Traversal	2541
772	Longest Common Prefix Word by Word Matching	2540
773	Nested List Weight Sum II LeetCode Solution	2538
774	Remove Duplicates from Sorted List II	2536
775	Find the Difference Leetcode Solution	2532
776	Maximum size subarray sum equals k	2527
777	Matrix Chain Multiplication	2526
778	Range LCM Queries	2524
779	Merging Intervals	2523
780	Super Ugly Number	2514
781	Reservoir Sampling	2514
782	Maximum Product Subarray	2507
783	Verify Preorder Serialization of a Binary Tree	2504
784	Friends Of Appropriate Ages LeetCode Solution	2501
785	Palindrome Partitioning	2500
786	K maximum sums of overlapping contiguous sub-arrays	2499
787	Reorder Array Using Given Indexes	2497
788	Balanced Binary Tree	2494
789	Check if a queue can be sorted into another queue using a stack	2492
790	Print a Binary Tree in Vertical Order	2492
791	Smallest Range II Leetcode Solution	2487
792	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2487
793	Flatten Binary Tree to Linked List LeetCode Solution	2486
794	Missing Number	2484
795	Check if any two intervals overlap among a given set of intervals	2470
796	Create Maximum Number	2465
797	Defanging an IP Address LeetCode Solution	2463
798	Find Maximum Sum Possible Equal Sum of Three Stacks	2461
799	Vertical sum in a given binary tree	2458
800	Valid Triangle Number LeetCode Solution	2456
801	The Painter’s Partition Problem	2455
802	Check if Two Expressions With Brackets are Same	2455
803	Peak Index in a Mountain Array LeetCode Solution	2452
804	Sorting a K Sorted Array	2452
805	Lowest Common Ancestor	2447
806	Maximum difference between two elements such as larger element comes after smaller	2447
807	Minimum insertions to form a palindrome with permutations allowed	2443
808	Minimum Distance Between BST Nodes Leetcode Solution	2436
809	Check if a given array can represent Preorder Traversal of Binary Search Tree	2435
810	Unique Binary Search Trees LeetCode Solution	2433
811	Find Three Element From Different Three Arrays Such That a + b + c = sum	2429
812	Find subarray with given sum (Handles Negative Numbers)	2425
813	Count number of triplets with product equal to given number	2425
814	Hamming Distance	2422
815	Largest Submatrix With Rearrangements LeetCode Solution	2421
816	Number Of Longest Increasing Subsequence	2421
817	Tree Traversal (Preorder, Inorder & Postorder)	2417
818	Find K Length Subarray of Maximum Average	2412
819	Valid Triangle Number LeetCode Solution	2411
820	Check if two nodes are on the same path in a Tree	2405
821	Flatten 2D Vector LeetCode Solution	2404
822	First Bad Version	2401
823	Find Common Characters Leetcode Solution	2398
824	Closest Leaf in a Binary Tree LeetCode Solution	2396
825	Employee Importance LeetCode Solution	2395
826	Find distance between two nodes of a Binary Tree	2392
827	Check Completeness of a Binary Tree LeetCode Solution	2391
828	Third Maximum Number Leetcode Solution	2390
829	Iterative Postorder Traversal Using Two Stacks	2389
830	Array Nesting Leetcode Solution	2387
831	Merging Two Sorted Arrays	2387
832	Find Peak Element	2385
833	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2377
834	Sort Elements by Frequency II	2377
835	Products of ranges in an array	2375
836	Find Element Using Binary Search in Sorted Array	2374
837	Newman-Conway Sequence	2373
838	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2372
839	Print all triplets in sorted array that form AP	2371
840	Valid Parenthesis String	2370
841	Find Smallest Range Containing Elements from k Lists	2368
842	Maximum subsequence sum such that no three are consecutive	2367
843	Diagonal Traversal of Binary Tree	2364
844	Largest BST Subtree LeetCode Solution	2362
845	Print All Distinct Elements of a Given Integer Array	2362
846	Arrange given numbers to form the biggest number	2358
847	Maximum number of segments of lengths a, b and c	2357
848	Longest Bitonic Subsequence	2353
849	Find Sum of all unique sub-array sum for a given array	2351
850	Distinct Subsequences	2350
851	Longest Palindromic Subsequence	2349
852	Print Right View of a Binary Tree	2347
853	Range Sum Query using Sparse Table	2341
854	Stone Game IV LeetCode Solution	2339
855	Bottom View of a Binary Tree	2337
856	Lower Case To Upper Case	2336
857	Find Nth Node	2334
858	Largest subarray with equal number of 0s and 1s	2330
859	Segment Tree	2330
860	Largest divisible pairs subset	2324
861	Path Sum	2322
862	Contiguous Array	2319
863	Trapping Rain Water II LeetCode Solution	2317
864	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2317
865	Number of siblings of a given Node in n-ary Tree	2316
866	Stone Game IV LeetCode Solution	2310
867	Subset Sum Problem in O(sum) space	2309
868	Shuffle an Array	2309
869	Four Elements that Sum to Given	2309
870	Binary array after M range toggle operations	2300
871	Merge Two Sorted Arrays	2299
872	Median of Two Sorted Arrays	2297
873	Find the largest multiple of 3	2295
874	Isomorphic Strings	2289
875	Unique Binary Search Trees	2283
876	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2279
877	Count and Say	2279
878	Permutations of a Given String Using STL	2279
879	Red-Black Tree Introduction	2273
880	Maximum Population Year LeetCode Solution	2266
881	Valid Number	2259
882	Find Largest d in Array such that a + b + c = d	2258
883	Infix to Postfix	2253
884	Next Greater Element in an Array	2253
885	Maximum Product Subarray	2250
886	Encoded String With Shortest Length LeetCode Solution	2246
887	Friends Pairing Problem	2246
888	Maximum Sum of 3 Non-Overlapping Subarrays	2241
889	Insert Delete GetRandom	2238
890	Find unique character in a string	2238
891	Averages of Levels in Binary Tree	2236
892	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2235
893	Transform a BST to Greater sum Tree	2235
894	Write a function to get the intersection point of two Linked Lists	2232
895	Count Primes in Ranges	2228
896	Closest Binary Search Tree Value Leetcode Solution	2226
897	Valid Perfect Square LeetCode Solution	2220
898	Height of a generic tree from parent array	2220
899	Orderly Queue LeetCode Solution	2216
900	The Number of Weak Characters in the Game LeetCode Solution	2212
901	Binary Search Tree Delete Operation	2212
902	Shuffle a given Array	2207
903	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2206
904	Range Minimum Query (Square Root Decomposition and Sparse Table)	2205
905	Sentence Screen Fitting LeetCode Solution	2198
906	Edit Distance	2187
907	Serialize and Deserialize Binary Tree	2185
908	Binary Tree Longest Consecutive Sequence LeetCode Solution	2183
909	Bold Words in String LeetCode Solution	2181
910	Minimum sum of squares of character counts in a given string after removing k characters	2180
911	Reorganize String	2174
912	Kth Smallest Number in Multiplication Table Leetcode Solution	2167
913	Diameter of N-Ary Tree LeetCode Solution	2159
914	Convert BST into a Min-Heap without using array	2159
915	Find Minimum In Rotated Sorted Array	2158
916	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2156
917	Next greater element	2155
918	Integer to Roman	2151
919	Swap Nodes In Pairs	2147
920	Lowest Common Ancestor in Binary Search Tree	2145
921	Maximum Product Subarray	2139
922	Next Greater Element II LeetCode Solution	2128
923	Advantages of BST over Hash Table	2126
924	Array Queries for multiply replacements and product	2124
925	Find the smallest binary digit multiple of given number	2121
926	K’th Largest Element in BST when modification to BST is not allowed	2120
927	K’th Largest element in BST using constant extra space	2115
928	Koko Eating Bananas LeetCode Solution	2112
929	Total Hamming Distance LeetCode Solution	2109
930	Best Meeting Point LeetCode Solution	2103
931	Print n terms of Newman-Conway Sequence	2102
932	Write Code to Determine if Two Trees are Identical	2101
933	Longest Increasing Consecutive Subsequence	2098
934	Check if an Array is Stack Sortable	2094
935	Constant time range add operation on an array	2090
936	Level Order Traversal of Binary Tree	2089
937	Serialize and Deserialize Binary Tree LeetCode Solution	2087
938	Queries on XOR of greatest odd divisor of the range	2084
939	Maximum Sum Increasing Subsequence	2078
940	Image Overlap LeetCode Solution	2073
941	Range Queries for Longest Correct Bracket Subsequence	2073
942	Number of Orders in the Backlog Leetcode Solution	2070
943	Power of Two	2066
944	Reverse a Path in BST using Queue	2065
945	Moving Stones Until Consecutive Leetcode Solution	2064
946	Clone a Binary Tree with Random Pointers	2063
947	Greatest Sum Divisible by Three LeetCode Solution	2057
948	Check if X can give change to every person in the Queue	2055
949	Find minimum number of merge operations to make an array palindrome	2054
950	Find the node with minimum value in a Binary Search Tree	2051
951	Design Underground System Leetcode Solution	2050
952	Valid Tic-Tac-Toe State LeetCode Solution	2046
953	A program to check if a binary tree is BST or not	2044
954	Numbers with prime frequencies greater than or equal to k	2042
955	Insert into a Sorted Circular Linked List LeetCode Solution	2035
956	Check if each internal node of a BST has exactly one child	2034
957	Count and Toggle Queries on a Binary Array	2032
958	Form minimum number from given sequence	2027
959	Factorial Trailing Zeroes LeetCode Solution	2023
960	Design Add and Search Words Data Structure LeetCode Solution	2020
961	Maximum Array from Two given Arrays Keeping Order Same	2019
962	Print Next Greater Number of Q queries	2015
963	Closest Binary Search Tree Value II LeetCode Solution	2012
964	Number of elements less than or equal to a given number in a given subarray	2012
965	Collect maximum points in a grid using two traversals	2012
966	Count the Pairs at Same Distance as in English Alphabets	2009
967	Graph Cloning	2004
968	Check for Palindrome after every character replacement Query	2002
969	Merge two BSTs with limited extra space	1999
970	Maximum difference between first and last indexes of an element in array	1997
971	Queries for Decimal Values of Subarrays of a Binary Array	1994
972	Largest Plus Sign Leetcode Solution	1992
973	Group Shifted Strings Leetcode Solution	1990
974	Merge Sorted Array	1987
975	Merge Sort	1975
976	Priority Queue	1972
977	Dividing Array into Pairs With Sum Divisible by K	1963
978	Longest Substring Without Repeating Characters Leetcode Solution	1957
979	Count even length binary sequences with same sum of first and second half bits	1951
980	Kth Smallest Element in a BST	1949
981	Cutting a Rod	1941
982	Print Ancestors of a Given Binary Tree Node Without Recursion	1941
983	Print modified array after multiple array range increment operations	1939
984	Form Minimum Number From Given Sequence	1936
985	Minimum Moves to Equal Array Elements LeetCode Solution	1932
986	Excel Sheet Column Number LeetCode Solution	1922
987	Swim in Rising Water LeetCode Solution	1915
988	Count Pairs Whose Products Exist in Array	1914
989	Guess The Word	1914
990	Find maximum average subarray of k length	1910
991	Unique Paths II	1907
992	Excel Sheet Column Title LeetCode Solution	1903
993	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1897
994	Print all Possible Ways to Break a String in Bracket Form	1891
995	Binary Search Tree	1889
996	How to print maximum number of A’s using given four keys	1887
997	Palindrome Partitioning	1885
998	K Empty Slots	1876
999	Check given array of size n can represent BST of n levels or not	1872
1000	Decrease Elements To Make Array Zigzag LeetCode Solution	1866
1001	Binary Search Tree Search and Insertion	1866
1002	Find postorder traversal of BST from preorder traversal	1854
1003	Longest Common Prefix using Character by Character Matching	1854
1004	Regular Expression Matching	1850
1005	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1846
1006	Sorted Array to Balanced BST	1846
1007	Sum of Left Leaves LeetCode Solution	1843
1008	Construct Complete Binary Tree from its Linked List Representation	1813
1009	Queries for Number of Distinct Elements in a Subarray	1798
1010	Maximum Depth Of Binary Tree	1797
1011	Maximum weight transformation of a given string	1787
1012	Find the Town Judge LeetCode Solution	1783
1013	Iterative method to find ancestors of a given binary tree	1776
1014	Binary Tree to Binary Search Tree Conversion using STL set	1761
1015	Symmetric Tree LeetCode Solution Leetcode Solution	1755
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1751
1017	Find Maximum Depth of Nested Parenthesis in a String	1747
1018	Random Pick Index LeetCode Solution	1746
1019	Data Structure Designing	1746
1020	Search in Sorted Rotated Array	1740
1021	Search an Element in Sorted Rotated Array	1709
1022	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1690
1023	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1676
1024	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1669
1025	Next Greater Element I Leetcode Solution	1646
1026	Print Maximum Length Chain of Pairs	1625
1027	Maximum Binary Tree	1604
1028	Flatten Binary Tree to Linked List LeetCode Solution	1597
1029	Find k-th smallest element in BST (Order Statistics in BST)	1595
1030	Peeking Iterator LeetCode Solution	1577
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1535