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	43526
2	Maximum occurring character in a string	19712
3	Plus One Leetcode Solution	19225
4	Valid Parentheses LeetCode Solution	19143
5	3Sum Leetcode Solution	17069
6	Merge Sorted Arrays Leetcode Solution	15239
7	First Repeating Element	15120
8	Single Number Leetcode Solution	14810
9	Count Primes Leetcode Solutions	14626
10	Pow(x, n) Leetcode Solution	14255
11	Sqrt(x) Leetcode Solution	14109
12	Meeting Rooms II LeetCode Solution	13197
13	Concatenation of Array LeetCode Solution	12738
14	Roman to Integer Leetcode Solution	11920
15	Valid Palindrome Leetcode Solution	11802
16	Contains Duplicate II Leetcode Solution	11723
17	Search Insert Position Leetcode Solution	11719
18	Palindrome Number LeetCode Solution	11528
19	Remove Duplicates from Sorted Array Leetcode Solution	11408
20	Jump Game Leetcode Solution	11137
21	Reverse Vowels of a String Leetcode Solution	11122
22	Intersection of Two Arrays II Leetcode Solution	11014
23	Longest Substring Without Repeating Characters LeetCode Solution	10993
24	Number of Good Pairs Leetcode Solution	10865
25	Spiral Matrix LeetCode Solution	10800
26	Kids With the Greatest Number of Candies Leetcode Solution	10733
27	House Robber Leetcode Solution	10679
28	Add Binary Leetcode Solution	10578
29	Maximum Subarray Leetcode Solution	10200
30	Number Of 1 bits	10038
31	Find the Maximum Repeating Number in Array	9926
32	Text Justification LeetCode Solution	9807
33	Move Zeroes LeetCode Solution	9750
34	Jewels and Stones Leetcode Solution	9713
35	Min Stack Leetcode Solution	9586
36	Power of Two Leetcode Solution	9513
37	Longest Palindromic Substring LeetCode Solution	9458
38	Shuffle String Leetcode Solution	9407
39	Permutations Leetcode Solution	9348
40	Evaluation of Postfix Expression	9259
41	Third Maximum Number Leetcode Solution	9255
42	Word Search Leetcode Solution	9218
43	Find All Numbers Disappeared in an Array Leetcode Solution	9214
44	Daily Temperatures Leetcode Solution	9198
45	Median of Two Sorted Arrays LeetCode Solution	9134
46	Next Permutation Leetcode Solution	9128
47	Search in Rotated Sorted Array Leetcode Solution	9069
48	Number of Islands LeetCode Solution	9002
49	Maximum Profit in Job Scheduling Leetcode Solution	8956
50	Kth Missing Positive Number Leetcode Solution	8950
51	Longest Common Prefix Leetcode Solution	8897
52	Next Greater Element I Leetcode Solution	8872
53	Frog Jump Leetcode Solution	8710
54	Valid Anagram Leetcode Solution	8588
55	Find Minimum Distance Between Two Numbers in an Array	8557
56	Rotate Image LeetCode Solution	8492
57	Running Sum of 1d Array Leetcode Solution	8481
58	Shuffle the Array Leetcode Solution	8449
59	Multiply Strings Leetcode Solution	8437
60	Can Place Flowers LeetCode Solution	8405
61	Combination Sum Leetcode Solution	8394
62	Count and Say Leetcode Solution	8370
63	House Robber II Leetcode Solution	8343
64	3Sum Closest LeetCode Solution	8274
65	Bulb Switcher LeetCode Solution	8260
66	Koko Eating Bananas Leetcode Solution	8096
67	Best Time to Buy and Sell Stock LeetCode Solution	8089
68	Excel Sheet Column Title Leetcode Solution	8061
69	Happy Number Leetcode Solution	8033
70	Isomorphic Strings Leetcode Solution	8017
71	Subarray and Subsequence	8006
72	Majority Element Leetcode Solution	7925
73	Count Pairs With Given Sum	7897
74	Integer to Roman Leetcode Solution	7864
75	Missing Number Leetcode Solution	7856
76	Candy LeetCode Solution	7845
77	Product of array except self	7844
78	Rotate String LeetCode Solution	7796
79	Strobogrammatic Number LeetCode Solution	7754
80	A Product Array Puzzle	7714
81	Reverse String Without Temporary Variable	7667
82	Is Subsequence Leetcode Solution	7636
83	Find the Difference Leetcode Solution	7611
84	Find the Duplicate Number LeetCode Solution	7595
85	Binary Search LeetCode Solution	7578
86	Expression Evaluation	7571
87	Find Common Characters Leetcode Solution	7536
88	Largest Number Leetcode Solution	7525
89	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7442
90	String to Integer (atoi) LeetCode Solution	7384
91	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7365
92	Subset Leetcode	7335
93	Summary Ranges Leetcode Solution	7285
94	Set Matrix Zeroes	7271
95	Rabin Karp Algorithm	7252
96	Word Pattern LeetCode Solution	7218
97	Sort Characters By Frequency LeetCode Solution	7212
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	7069
103	Rearrange Positive and Negative Numbers Alternatively in Array	6988
104	String Compression LeetCode Solution	6974
105	Asteroid Collision LeetCode Solution	6945
106	Group Anagrams LeetCode Solution	6931
107	Postfix to Infix Conversion	6905
108	Repeated Substring Pattern LeetCode Solution	6880
109	Page Replacement Algorithms in Operating Systems	6847
110	Smallest window in a string containing all characters of another string	6834
111	Sort Colors LeetCode Solution	6790
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	6641
115	Zigzag Conversion LeetCode Solution	6629
116	Divide Two Integers Leetcode Solution	6597
117	Generate Parentheses Leetcode Solution	6588
118	Kth largest element in an Array Leetcode Solutions	6578
119	Valid Palindrome II Leetcode Solution	6573
120	Sum of minimum and maximum elements of all subarrays of size k	6561
121	Assign Cookies Leetcode Solution	6487
122	Reverse Integer Leetcode Solution	6461
123	Remove Duplicates from Sorted Array II Leetcode Solution	6454
124	Length of Last Word Leetcode Solution	6422
125	Product of Array Except Self LeetCode Solution	6416
126	Decode String Leetcode Solution	6414
127	Find the Row with Maximum Number of 1’s	6411
128	Pascal Triangle Leetcode	6359
129	Bus Routes Leetcode Solution	6347
130	H-Index Leetcode Solution	6346
131	Number of Provinces Leetcode Solution	6334
132	Merge Two Sorted Lists Leetcode Solutions	6320
133	Linked List Cycle II LeetCode Solution	6245
134	Convert array into Zig-Zag fashion	6236
135	Minimum Steps to reach target by a Knight	6227
136	Minimum Cost For Tickets Leetcode Solution	6225
137	Defanging an IP Address Leetcode Solution	6218
138	Prefix to Infix Conversion	6213
139	Optimal Account Balancing LeetCode Solution	6208
140	Employee Free Time LeetCode Solution	6198
141	Pascal’s Triangle II Leetcode Solution	6110
142	Find First and Last Position of Element in Sorted Array Leetcode Solution	6072
143	First element occurring k times in an array	6047
144	Increasing Triplet Subsequence LeetCode Solution	6044
145	Merge Sorted Array LeetCode Solution	6016
146	Build Array From Permutation Leetcode Solution	6005
147	Implementation of Deque using Doubly Linked List	6004
148	Island Perimeter Leetcode Solution	5979
149	Majority Element II Leetcode Solution	5978
150	Robot Room Cleaner Leetcode Solution	5957
151	Max Consecutive Ones Leetcode Solution	5915
152	Bellman Ford Algorithm	5908
153	Find Pair with Given Difference	5871
154	Swap Nodes in Pairs Leetcode Solutions	5868
155	Check if the Elements of an Array are Consecutive	5860
156	OSI Model	5852
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	5821
160	KMP Algorithm	5815
161	Add Two Numbers II Leetcode Solution	5806
162	Find the Missing Number	5788
163	Fibonacci Number LeetCode Solution	5766
164	First negative integer in every window of size k	5762
165	Trapping Rain Water Leetcode Solution	5757
166	Lemonade Change Leetcode Solution	5751
167	Subarray Sum Equals K LeetCode Solution	5745
168	Design Parking System Leetcode Solution	5735
169	Delete middle element of a stack	5708
170	First Unique Character in a String LeetCode Solution	5699
171	Word Ladder LeetCode Solution	5676
172	Find All Duplicates in an Array LeetCode Solution	5655
173	Coin Change 2 Leetcode Solution	5654
174	Subarray with Given Sum	5646
175	String Compression	5645
176	Length of the largest subarray with contiguous elements	5644
177	Last Stone Weight	5643
178	Subarray Product Less Than K LeetCode Solution	5641
179	Monotonic Array LeetCode Solution	5630
180	Capacity To Ship Packages Within D Days Leetcode Solution	5627
181	Palindrome Linked List Leetcode Solution	5605
182	Repeated Substring Pattern	5554
183	Find Smallest Missing Number in a Sorted Array	5535
184	Form Minimum Number from Given Sequence of D’s and I’s	5532
185	Single Element in a Sorted Array LeetCode Solution	5518
186	01 Matrix LeetCode Solution	5485
187	Combinations Leetcode Solution	5484
188	Remove Duplicates from Sorted List II LeetCode Solution	5478
189	Prefix to Postfix Conversion	5467
190	Continuous Subarray Sum LeetCode Solution	5430
191	Reverse Words in a String III LeetCode Solution	5419
192	Valid Perfect Square Leetcode Solution	5414
193	Iterative Implementation of Quick Sort	5389
194	Same Tree LeetCode Solution	5381
195	Break a Palindrome LeetCode Solution	5371
196	Combination Sum	5369
197	Leetcode Permutations	5341
198	Merge k Sorted Lists Leetcode Solution	5331
199	Remove Linked List Elements Leetcode Solution	5319
200	Slowest Key Leetcode Solution	5289
201	Top K Frequent Elements LeetCode Solution	5280
202	Relative Ranks Leetcode Solution	5275
203	Backspace String Compare	5272
204	Maximum Product of Three Numbers LeetCode Solution	5250
205	Rotate List Leetcode Solution	5240
206	Insert Delete GetRandom O(1) Leetcode Solution	5239
207	Container With Most Water LeetCode Solution	5231
208	Find Peak Element LeetCode Solution	5218
209	Find the Duplicate Element	5201
210	Contains Duplicate LeetCode Solution	5191
211	Boolean Parenthesization Problem	5179
212	The K Weakest Rows in a Matrix Leetcode Solution	5171
213	Printing brackets in Matrix Chain Multiplication Problem	5143
214	Cuckoo sequence program	5135
215	Longest Common Subsequence LeetCode Solution	5111
216	Second Most Repeated Word in a Sequence	5110
217	Palindrome Number	5100
218	Kth Largest Element in a Stream Leetcode Solution	5095
219	Subarray Sum Equals k	5080
220	Remove All Occurrences of a Substring LeetCode Solution	5062
221	Permutation in String Leetcode Solution	5045
222	Rearrange given Array in Maximum Minimum Form	5041
223	Relative Sort Array Leetcode Solution	5040
224	Make The String Great Leetcode Solution	5039
225	Max Area of Island	5021
226	Find Leaders in an Array	5017
227	Unique Paths II Leetcode Solution	5010
228	Generate all Binary Strings Without Consecutive 1’s	5005
229	Arithmetic Expression Evaluation	5004
230	Convert a Number to Hexadecimal Leetcode Solution	4998
231	Delete Node in a Linked List Leetcode Solution	4985
232	Target Sum	4973
233	Check If Two String Arrays are Equivalent Leetcode Solution	4963
234	Construct Binary Tree from Given Inorder and Preorder Traversals	4955
235	N-Queens LeetCode Solution	4952
236	Moving Average from Data Stream Leetcode Solution	4949
237	Time Based Key-Value Store LeetCode Solution	4942
238	Scramble String	4929
239	Letter Combinations of a Phone Number	4914
240	Next Permutation	4906
241	Number of Dice Rolls With Target Sum LeetCode Solution	4904
242	Count Good Nodes in Binary Tree Leetcode Solution	4904
243	LRU Cache LeetCode Solution	4892
244	Find N Unique Integers Sum up to Zero Leetcode Solution	4858
245	Check If N and Its Double Exist Leetcode Solution	4857
246	Stone Game LeetCode	4853
247	Given two unsorted arrays find all pairs whose sum is x	4849
248	Find Triplet in Array With a Given Sum	4839
249	Number of Steps to Reduce a Number to Zero Leetcode Solution	4804
250	Flipping an Image LeetCode Solution	4803
251	Prim’s Algorithm	4782
252	Minimum swaps required to bring all elements less than or equal to k together	4776
253	Reverse Only Letters LeetCode Solution	4751
254	Top K Frequent Elements	4750
255	Remove Minimum Characters so that Two Strings Become Anagrams	4750
256	Find The Duplicate Number	4741
257	Stock Buy Sell to Maximize Profit	4738
258	Min Cost Climbing Stairs LeetCode Solution	4725
259	Minimum Knight Moves LeetCode Solution	4717
260	Min Stack	4715
261	Student Attendance Record I Leetcode Solution	4712
262	To Lower Case Leetcode Solution	4662
263	Single Number	4660
264	Minimum Operations to convert X to Y	4657
265	Smallest Positive Number Missing in an Unsorted Array	4653
266	Maximum Sum Increasing Subsequence	4651
267	The kth Factor of n Leetcode Solution	4636
268	Maximum Subarray Sum using Divide and Conquer	4628
269	Reverse words in a string	4618
270	License Key Formatting Leetcode Solution	4615
271	Maximum Population Year LeetCode Solution	4601
272	Longest Common Subsequence	4546
273	Remove Nth Node From End of List Leetcode Solution	4535
274	Search Suggestions System LeetCode Solution	4533
275	Top K Frequent Words LeetCode Solution	4529
276	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4517
277	Find the Number Occurring Odd Number of Times in an Array	4509
278	Reformat Date LeetCode Solution	4503
279	Sum of Subarray Ranges Leetcode Solution	4493
280	Find Words That Can Be Formed by Characters Leetcode Solution	4487
281	BFS for Disconnected Graph	4482
282	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4448
283	Minimum Path Sum Leetcode Solution	4447
284	Maximum Depth of Binary Tree Leetcode Solution	4438
285	Reveal Cards In Increasing Order Leetcode Solution	4414
286	N-th Tribonacci Number Leetcode Solution	4410
287	Intersection of Two Arrays	4390
288	Diagonal Traverse LeetCode Solution	4377
289	House Robber	4377
290	Reverse individual words	4376
291	Evaluate Division	4363
292	Best Time to Buy and Sell Stock III Leetcode Solution	4356
293	Maximize Distance to Closest Person LeetCode Solution	4354
294	Find any one of the multiple repeating elements in read only array	4353
295	Last Stone Weight II LeetCode Solution	4351
296	Minimum Characters to be Added at Front to Make String Palindrome	4346
297	Sort Elements by Frequency of Occurrences	4326
298	Design A Leaderboard Leetcode Solution	4321
299	Remove Duplicates from Sorted List LeetCode Solution	4319
300	Find if Path Exists in Graph Leetcode Solution	4318
301	Maximum Size Subarray Sum Equals k Leetcode Solution	4317
302	Binary Tree Inorder Traversal LeetCode Solution	4317
303	Count Number of Occurrences in a Sorted Array	4311
304	Count of index pairs with equal elements in an array	4307
305	Length of Longest valid Substring	4297
306	Range Sum Query 2D – Immutable Leetcode Solution	4287
307	Reverse Nodes in k-Group LeetCode Solution	4276
308	Most Frequent Element in an Array	4273
309	Minimum number of Merge Operations to make an Array Palindrome	4259
310	Remove All Ones With Row and Column Flips Leetcode Solution	4243
311	Implement a stack using single queue	4243
312	Sudoku Solver	4242
313	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4220
314	Brightest Position on Street LeetCode Solution	4210
315	Find the Closest Palindrome number	4205
316	Mobile Numeric Keypad Problem	4201
317	Spiral Matrix II Leetcode Solution	4192
318	Split Linked List in Parts Leetcode Solution	4178
319	Find Leaves of Binary Tree LeetCode Solution	4177
320	Reverse Bits	4175
321	Special Positions in a Binary Matrix Leetcode Solution	4171
322	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4164
323	Invalid Transactions LeetCode Solution	4151
324	Symmetric Tree Leetcode Solution	4138
325	Shortest Word Distance Leetcode Solution	4136
326	Paint House LeetCode Solution	4133
327	Maximum Subarray	4127
328	Sort Array By Parity II Leetcode Solution	4109
329	Arrange given Numbers to Form the Biggest Number II	4105
330	Diagonal Traversal LeetCode Solution	4081
331	Find Duplicates in an Array in Most Efficient Way	4078
332	One Edit Distance LeetCode Solution	4077
333	Round Robin Scheduling	4075
334	Largest Rectangle in Histogram LeetCode Solution	4061
335	Remove Invalid Parentheses Leetcode Solution	4048
336	Dijkstra Algorithm	4047
337	Rank Transform of an Array Leetcode Solution	4042
338	Hamming Distance Leetcode Solution	4038
339	Jump Game	4034
340	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4027
341	Alien Dictionary LeetCode Solution	4027
342	Partition Labels LeetCode Solution	4026
343	Unique Paths	4021
344	Tug of War	4008
345	Minimum Moves to Equal Array Elements Leetcode Solution	3998
346	Maximal Square	3998
347	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3986
348	String Matching in an Array Leetcode Solution	3982
349	Find Winner on a Tic Tac Toe Game Leetcode Solution	3975
350	Construct BST from its given Level Order Traversal	3974
351	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3967
352	The Celebrity Problem	3967
353	Range Sum of BST LeetCode Solution	3963
354	Next Permutation LeetCode Solution	3960
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	3950
358	Minimum Depth of Binary Tree Leetcode Solution	3940
359	Merge Two Sorted Linked Lists	3930
360	Pair of Positive Negative Values in an Array	3928
361	Validate Stack Sequences LeetCode Solution	3927
362	Longest Common Prefix using Trie	3926
363	Unique Paths III LeetCode Solution	3921
364	Postfix to Prefix Conversion	3915
365	Smallest Subarray with k Distinct Numbers	3913
366	Maximum Circular Subarray Sum	3913
367	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3912
368	Given an Array of Pairs Find all Symmetric Pairs in it	3908
369	Transpose Graph	3894
370	Minimum Time Visiting All Points Leetcode Solution	3892
371	Check whether Strings are K Distance Apart or Not	3890
372	Count of Triplets With Sum Less than Given Value	3889
373	Minimum Cost to Hire K Workers	3878
374	Substring with Concatenation of All Words Leetcode Solution	3872
375	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3872
376	K Empty Slots LeetCode	3871
377	Robot Bounded In Circle LeetCode Solution	3868
378	Next Greater Element III LeetCode Solution	3866
379	Recursion	3864
380	Invert Binary Tree LeetCode Solution	3863
381	Clone Graph LeetCode Solution	3860
382	Find minimum difference between any two elements	3860
383	Check if a given array contains duplicate elements within k distance from each other	3855
384	Longest Substring with At Most K Distinct Characters LeetCode Solution	3844
385	Ugly Number II LeetCode Solution	3842
386	Kruskal Algorithm	3834
387	Implementation of Deque using circular array	3830
388	Sort a stack using a temporary stack	3828
389	Regular Expression Matching Regular Expression Matching LeetCode Solution	3822
390	Minimize Maximum Pair Sum in Array LeetCode Solution	3814
391	Non-decreasing Array LeetCode Solution	3810
392	Invert Binary Tree LeetCode Solution	3795
393	Toeplitz Matrix	3795
394	Permutation Sequence LeetCode Solution	3793
395	Graph Valid Tree LeetCode Solution	3788
396	Stack Permutations (Check if an array is stack permutation of other)	3788
397	Longest subsequence such that difference between adjacents is one	3782
398	LRU Cache Implementation	3782
399	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3779
400	Find the subarray with least average	3779
401	Sliding Window Technique	3774
402	Word Search	3773
403	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3769
404	Longest subarray not having more than K distinct elements	3764
405	Find the First and Second Smallest Elements	3764
406	Kth Smallest Element in a BST Leetcode Solution	3763
407	Design Browser History LeetCode Solution	3761
408	3 Sum	3760
409	Missing Element in Sorted Array LeetCode Solution	3753
410	Find the Smallest Divisor given a Threshold Leetcode Solution	3744
411	Find duplicates in a given array when elements are not limited to a range	3742
412	Partition List Leetcode Solution	3734
413	Number of Islands II LeetCode Solution	3724
414	Priority Queue using doubly linked list	3723
415	Common elements in all rows of a given matrix	3720
416	Find Top K (or Most Frequent) Numbers in a Stream	3717
417	Path With Maximum Minimum Value LeetCode Solution	3716
418	Queries for counts of array elements with values in given range	3716
419	Number Complement Leetcode Solution	3715
420	Stone Game II Leetcode	3715
421	First Circular Tour to Visit all the Petrol Bunks	3714
422	K Closest Points to Origin Leetcode Solution	3710
423	Top View of Binary Tree	3705
424	Number of Smaller Elements on Right Side	3703
425	Minesweeper LeetCode Solution	3701
426	Find Maximum Level sum in Binary Tree	3699
427	Max stack	3697
428	Search a 2D Matrix II Leetcode Solution	3690
429	Maximum Number of Occurrences of a Substring Leetcode Solution	3689
430	Sequences of given length where every element is more than or equal to twice of previous	3689
431	LRU Cache Leetcode Solution	3688
432	Find the Peak Element from an Array	3685
433	Combination Sum IV LeetCode Solution	3680
434	Integer Break LeetCode Solution	3675
435	Snakes and Ladders LeetCode Solution	3670
436	Nth Catalan Number	3670
437	High Five LeetCode Solution	3663
438	Painting Fence Algorithm	3660
439	Can Make Arithmetic Progression From Sequence Leetcode Solution	3659
440	Sort elements by frequency	3655
441	Longest Palindrome can be Formed by Removing or Rearranging Characters	3640
442	Odd Even Linked List Leetcode Solution	3634
443	Insert Interval Leetcode Solution	3629
444	Find Minimum in Rotated Sorted Array II LeetCode Solution	3623
445	Maximum Consecutive Numbers Present in an Array	3619
446	Check if Two given Strings are Isomorphic to each other	3618
447	Rearrange array such that even positioned are greater than odd	3617
448	Fibonacci Number LeetCode Solution	3616
449	Flood Fill LeetCode	3616
450	Shortest Palindrome	3613
451	Sliding Window Maximum LeetCode Solution	3607
452	Consecutive Characters LeetCode Solution	3606
453	Search in a Binary Search Tree Leetcode Solution	3605
454	4Sum	3605
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	3577
458	Move All the Zeros to the End of the Given Array	3577
459	Tiling Problem	3575
460	Gold Mine Problem	3561
461	Expression Contains Redundant Bracket or Not	3560
462	Number of Closed Islands Leetcode Solution	3559
463	Kth Non-repeating Character	3557
464	Spiral Matrix III LeetCode Solution	3554
465	Replace Elements with Greatest Element on Right Side Leetcode Solution	3552
466	Insert into a Binary Search Tree Leetcode Solution	3551
467	Minimum Absolute Difference in BST Leetcode Solution	3544
468	Find a Peak Element II LeetCode Solution	3539
469	Coin Change Problem	3528
470	Queries for GCD of all numbers of an array except elements in a given range	3524
471	Integer to English words	3523
472	Check If Array Pairs Are Divisible by k LeetCode Solution	3522
473	Minimum Path Sum	3517
474	N queen problem	3517
475	Sliding Window Median Leetcode Solution	3515
476	Evaluate Reverse Polish Notation LeetCode Solution	3512
477	Decompress Run-Length Encoded List Leetcode Solution	3512
478	Restore IP Addresses Leetcode Solution	3509
479	Trapping Rain Water LeetCode Solution	3506
480	Longest Common Prefix using Sorting	3504
481	Interval Tree	3500
482	Convert Sorted Array to Binary Search Tree Leetcode Solution	3492
483	Balanced Expression with Replacement	3487
484	Sorting array using Stacks	3485
485	Find All Possible Recipes from Given Supplies LeetCode Solution	3484
486	Sort an array according to the order defined by another array	3480
487	Sort Colors	3480
488	Binary Tree Maximum Path Sum LeetCode Solution	3476
489	Find Pythagorean Triplets from Array	3464
490	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3459
491	Majority Element	3458
492	Cells with Odd Values in a Matrix LeetCode Solution	3450
493	Best Time to Buy and Sell Stock	3446
494	Reverse a linked list	3446
495	Vertical Order Traversal of Binary Tree LeetCode Solution	3442
496	Palindrome Substring Queries	3438
497	Subset sum problem	3432
498	Number of Days Between Two Dates LeetCode Solution	3428
499	Priority Queue in C++	3423
500	Find Median from Data Stream LeetCode Solution	3418
501	The Stock Span Problem	3418
502	Fibonacci numbers	3413
503	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3408
504	Path Sum II LeetCode Solution	3408
505	Queue using Stacks	3403
506	Path Crossing Leetcode Solution	3401
507	Find the first Repeating Number in a Given Array	3400
508	Sieve of Eratosthenes	3399
509	Camelcase Matching Leetcode Solution	3388
510	Is Graph Bipartite? LeetCode Solution	3386
511	Multiplication of Two Matrices	3379
512	Largest rectangular sub-matrix whose sum is 0	3378
513	Kth ancestor of a node in binary tree	3377
514	Intersection of Two Linked Lists LeetCode Solution	3375
515	Design Hit Counter LeetCode Solution	3368
516	How to Implement Stack Using Priority Queue or Heap?	3364
517	Pancake Sorting Problem	3358
518	Divide Chocolate LeetCode Solution	3353
519	Analyze User Website Visit Pattern LeetCode Solution	3353
520	Custom Sort String Leetcode Solution	3352
521	Shortest Completing Word Leetcode Solution	3352
522	Longest Increasing Path in a Matrix LeetCode Solution	3351
523	Monotonic Array Leetcode Solution	3341
524	Different Ways to Add Parentheses Leetcode Solution	3340
525	Count Submatrices With All Ones LeetCode Solution	3334
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	3326
528	Group Anagrams	3324
529	Find a Fixed Point in a Given Array	3322
530	Check if Array Contains Contiguous Integers With Duplicates Allowed	3316
531	Scramble String LeetCode Solution	3313
532	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3308
533	Perfect Squares LeetCode Solution	3305
534	Detect a loop in the Linked List	3303
535	Generate all Binary Strings from Given Pattern	3297
536	Shifting Letters LeetCode Solution	3294
537	Queue based approach for first non-repeating character in a stream	3287
538	Minimum Height Trees	3287
539	Construction of Longest Increasing Subsequence (N log N)	3285
540	Merge Overlapping Intervals	3285
541	Implement Trie (Prefix Tree) Leetcode Solution	3281
542	Implement strStr() LeetCode Solution	3278
543	Valid Boomerang Leetcode Solution	3275
544	Number of Distinct Islands Leetcode Solution	3274
545	Nearest Exit from Entrance in Maze LeetCode Solution	3269
546	Decode Ways	3266
547	How to Create Mergable Stack?	3260
548	Reorder Data in Log Files LeetCode Solution	3259
549	Race Car LeetCode Solution	3256
550	Sort a stack using recursion	3249
551	Champagne Tower LeetCode Solution	3248
552	Maximum Sum of Non Consecutive Elements	3246
553	Morris Traversal	3245
554	Binary Tree zigzag level order Traversal	3245
555	Sliding Window Maximum	3245
556	Longest Common Prefix using Divide and Conquer	3244
557	Maximum Element in an Array which is Increasing and then Decreasing	3242
558	Find the Lost Element From a Duplicated Array	3235
559	Best Time to Buy and Sell Stock IV LeetCode Solution	3233
560	Number of Equivalent Domino Pairs Leetcode Solution	3229
561	Insert Node in the Sorted Linked List	3227
562	LCS (Longest Common Subsequence) of three strings	3226
563	Most Stones Removed with Same Row or Column LeetCode Solution	3224
564	Find if an Expression has Duplicate Parenthesis or Not	3219
565	Find maximum length Snake sequence	3218
566	Count Possible Triangles	3216
567	First missing positive	3214
568	Build an Array With Stack Operations Leetcode Solution	3212
569	Recover Binary Search Tree	3212
570	Palindrome Permutation LeetCode Solution	3211
571	Design Skiplist LeetCode Solution	3200
572	Decode String	3200
573	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3199
574	Letter Case Permutation	3199
575	Find a Sorted Subsequence of size 3	3196
576	Smallest Good Base	3194
577	Rectangle Overlap LeetCode Solution	3186
578	Minimum Bracket Reversals	3184
579	Merge Two Binary Trees LeetCode Solution	3177
580	Contiguous Array LeetCode Solution	3176
581	Longest Repeated Subsequence	3171
582	Longest Substring with At Least K Repeating Characters LeetCode Solution	3169
583	All Possible Full Binary Trees LeetCode Solution	3168
584	Distance Between Bus Stops Leetcode Solution	3168
585	Guess Number Higher or Lower II	3167
586	Recover Binary Search Tree Leetcode Solution	3161
587	Largest Subarray with Equal Number of 0’s and 1’s	3160
588	Maximum Length of Chain Pairs	3156
589	Palindrome Partitioning Leetcode Solution	3155
590	Find the Town Judge LeetCode Solution	3152
591	Maximum Depth of N-ary Tree Leetcode Solution	3148
592	Minimum Height Trees LeetCode Solution	3147
593	Print all Palindromic Partitions of a String	3146
594	Maximum Number of Ways to Partition an Array LeetCode Solution	3140
595	Find the two Numbers with Odd Occurrences in an Unsorted Array	3136
596	Minimum number of jumps to reach end	3135
597	Design a Stack With Increment Operation Leetcode Solution	3134
598	K-th Distinct Element in an Array	3129
599	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3118
600	Rearrange Spaces Between Words Leetcode Solution	3115
601	Check for Balanced Parentheses in an Expression	3109
602	Implement Two Stacks in an Array	3109
603	Valid Parentheses Leetcode Solution	3107
604	The Maze III LeetCode Solution	3107
605	Reorder an Array According to the Given Indexes	3106
606	Subarrays with K Different Integers Leetcode Solution	3096
607	Mean of Array After Removing Some Elements Leetcode Solution	3092
608	Maximize Elements Using Another Array	3086
609	Sort a String According to Another String	3085
610	Maximum Score After Splitting a String Leetcode Solution	3074
611	Jump Game IV LeetCode Solution	3064
612	Maximum sum rectangle in a 2D matrix	3059
613	Count pair with Given Sum	3056
614	Contains Duplicate	3053
615	Find the First Circular Tour that visits all the Petrol Pumps	3048
616	Valid Sudoku	3043
617	Perform String Shifts Leetcode	3042
618	Convert BST to Min Heap	3037
619	Word Break	3028
620	Possible Bipartition LeetCode Solution	3025
621	Edit Distance LeetCode Solution	3023
622	Minimum Jumps to Reach Home LeetCode Solution	3023
623	Iterative Method to find Height of Binary Tree	3023
624	Heap Sort	3020
625	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3013
626	Find the Minimum Element in a Sorted and Rotated Array	3012
627	A Space Optimized DP solution for 0-1 Knapsack Problem	3011
628	Palindrome Permutations of a String	3007
629	Find Largest Value in Each Tree Row LeetCode Solution	2995
630	Reach a Number LeetCode Solution	2983
631	Find First and Last Position of Element in Sorted Array LeetCode Solution	2980
632	Count Sub Islands LeetCode Solution	2977
633	Best Meeting Point LeetCode Solution	2977
634	Merge Overlapping Intervals II	2977
635	Maximum Product of Splitted Binary Tree LeetCode Solution	2970
636	Palindromic Substrings Leetcode Solution	2970
637	Palindrome Permutation	2970
638	Number of palindromic paths in a matrix	2964
639	Merge Two Balanced Binary Search Trees	2959
640	Segregate 0s and 1s in an Array	2951
641	Find the Subarray of given length with Least Average	2951
642	My Calendar I LeetCode Solution	2948
643	All Unique Triplets that Sum up to a Given Value	2948
644	Sorted Linked List to Balanced BST	2945
645	Caesar Cipher	2940
646	Huffman Coding	2939
647	Pair with given product	2935
648	Brick Wall LeetCode Solution	2926
649	Level order Traversal in Spiral Form	2925
650	Check if the given array can represent Level Order Traversal of Binary Search Tree	2924
651	Construct BST from given Preorder Traversal	2922
652	Find Median from data Stream	2918
653	Word Pattern	2916
654	Swapping Nodes in a Linked List Leetcode Solution	2912
655	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2902
656	Find all triplets with zero sum	2900
657	Partition Problem	2899
658	Merge K Sorted Arrays and Print Sorted Output	2885
659	Count Good Nodes in Binary Tree LeetCode Solution	2878
660	Maximize Sum of Array after K Negations Leetcode Solution	2874
661	Print Fibonacci sequence using 2 variables	2874
662	Validate Binary Search Tree	2867
663	Minimum time required to rot all oranges	2857
664	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2854
665	Add two numbers	2854
666	Alien Dictionary	2854
667	Find whether a subarray is in form of a mountain or not	2852
668	Isomorphic Strings LeetCode Solution	2850
669	Count Distinct Elements in Every Window of Size K	2848
670	Detect Capital Leetcode Solution	2845
671	Queries on Probability of Even or Odd Number in given Ranges	2845
672	Largest Sum Contiguous Subarray	2840
673	Sort 0s 1s and 2s in an Array	2840
674	Longest Subarray Having Count of 1s One More than Count of 0s	2839
675	Find all pairs (a, b) in an array such that a % b = k	2838
676	Convert Sorted List to Binary Search Tree	2838
677	How to Efficiently Implement k Stacks in a Single Array?	2836
678	Maximum Frequency Stack Leetcode Solution	2834
679	Bubble sort using two Stacks	2832
680	Range Sum Query 2D – Immutable LeetCode Solution	2826
681	Split Array Into Consecutive Subsequences	2826
682	Counting Bits	2823
683	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2821
684	Binary Tree Right Side View LeetCode Solution	2821
685	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2820
686	Find four elements that sum to a given value (Hashmap)	2815
687	Length of Longest Fibonacci Subsequence	2809
688	Rotate Array	2809
689	Breadth First Search (BFS) for a Graph	2805
690	Remove brackets from an algebraic string containing + and – operators	2804
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	2800
692	Binary Tree to Binary Search Tree Conversion	2796
693	Minimum Swaps to Group All 1’s Together Leetcode Solution	2794
694	Maximum Number of Chocolates to be Distributed Equally Among k Students	2791
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	Remove Palindromic Subsequences Leetcode Solution	2772
698	Merge Two Sorted Lists Leetcode	2771
699	Print all subarrays with 0 sum	2770
700	Populating Next Right Pointers in Each Node	2767
701	Difference Array \| Range update query in O(1)	2759
702	Populating Next Right Pointers in Each Node Leetcode Solution	2751
703	Partition Equal Subset Sum	2748
704	Find pairs with given sum such that elements of pair are in different rows	2746
705	Topological Sorting	2744
706	Minimum Sum Path in a Triangle	2740
707	Remove duplicates from sorted array	2740
708	String comparison containing wildcards	2740
709	Happy Number	2738
710	Arithmetic Slices II – Subsequence LeetCode Solution	2734
711	Elements Appear more than N/K times in Array	2731
712	Contiguous Array Leetcode	2723
713	Check if a Linked list of Strings form a Palindrome	2723
714	Concatenation of Array LeetCode Solution	2719
715	Queue Reconstruction by Height	2718
716	Find All Pairs With a Given Difference	2715
717	Web Crawler LeetCode Solution	2714
718	Inorder Successor of a node in Binary Tree	2711
719	Find Duplicate Subtrees	2699
720	Root to Leaf path with target sum Leetcode Solutions	2687
721	Reverse Nodes in K-Group	2687
722	Increasing Subsequence of Length three with Maximum Product	2680
723	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2671
724	Check if String Follows Order of Characters by a Pattern or not	2669
725	Finding K closest element	2664
726	Score of Parenthesis LeetCode Solution	2662
727	Swap Kth Node from beginning with Kth Node from End	2659
728	Minimum Swaps to Make Strings Equal Leetcode Solution	2654
729	Given a binary tree, how do you remove all the half nodes?	2652
730	Symmetric Tree	2652
731	Maximum Distance in Array	2649
732	Pancake Sorting	2648
733	Longest Common Prefix Using Binary Search II	2644
734	Climbing stairs	2642
735	Maximum Product Subarray II	2639
736	Construct Binary Tree from given Parent Array representation	2634
737	An Interesting Method to generate Binary Numbers from 1 to n	2634
738	Longest Increasing Subsequence	2634
739	Container with Most Water	2634
740	Count Minimum Steps to Get the given Array	2633
741	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2629
742	Deletion in a Binary Tree	2618
743	Sum Root to Leaf Numbers LeetCode Solution	2610
744	Parallel Courses II LeetCode Solution	2610
745	Check if all levels of two Binary Tree are anagrams or not	2609
746	Find the first repeating element in an array of integers	2608
747	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2607
748	Delete Nodes and Return Forest Leetcode Solution	2606
749	Union and Intersection of two Linked Lists	2604
750	Delete Nth node from the end of the given linked list	2600
751	MiniMax Algorithm	2596
752	Substring With Concatenation Of All Words	2593
753	Boundary Traversal of binary tree	2588
754	Level order traversal using two Queues	2586
755	Kill Process LeetCode Solution	2585
756	Count pairs from two linked lists whose sum is equal to a given value	2583
757	Level of Each node in a Tree from source node	2576
758	Sort Array by Increasing Frequency Leetcode Solution	2573
759	Non-overlapping sum of two sets	2573
760	BFS vs DFS for Binary Tree	2573
761	Linked List Cycle	2571
762	Minimum Size Subarray Sum	2569
763	Iterative Depth First Traversal of Graph	2567
764	Find K Closest Elements LeetCode Solution	2563
765	Valid Anagrams	2562
766	Rearrange an Array Such that arr[i] is equal to i	2562
767	Merge K Sorted Linked Lists	2558
768	Minimum Remove to Make Valid Parentheses LeetCode Solution	2555
769	Find Maximum of Minimum for Every Window Size in a Given Array	2553
770	New 21 Game	2551
771	Iterative Preorder Traversal	2545
772	Longest Common Prefix Word by Word Matching	2543
773	Nested List Weight Sum II LeetCode Solution	2538
774	Remove Duplicates from Sorted List II	2538
775	Find the Difference Leetcode Solution	2534
776	Maximum size subarray sum equals k	2530
777	Range LCM Queries	2528
778	Matrix Chain Multiplication	2527
779	Merging Intervals	2525
780	Reservoir Sampling	2523
781	Super Ugly Number	2516
782	Maximum Product Subarray	2510
783	Verify Preorder Serialization of a Binary Tree	2508
784	Friends Of Appropriate Ages LeetCode Solution	2504
785	Palindrome Partitioning	2504
786	K maximum sums of overlapping contiguous sub-arrays	2501
787	Reorder Array Using Given Indexes	2499
788	Check if a queue can be sorted into another queue using a stack	2498
789	Balanced Binary Tree	2497
790	Print a Binary Tree in Vertical Order	2495
791	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2491
792	Missing Number	2491
793	Smallest Range II Leetcode Solution	2490
794	Flatten Binary Tree to Linked List LeetCode Solution	2488
795	Check if any two intervals overlap among a given set of intervals	2476
796	Create Maximum Number	2468
797	Defanging an IP Address LeetCode Solution	2463
798	Find Maximum Sum Possible Equal Sum of Three Stacks	2463
799	Vertical sum in a given binary tree	2459
800	The Painter’s Partition Problem	2458
801	Check if Two Expressions With Brackets are Same	2458
802	Valid Triangle Number LeetCode Solution	2456
803	Sorting a K Sorted Array	2456
804	Maximum difference between two elements such as larger element comes after smaller	2456
805	Peak Index in a Mountain Array LeetCode Solution	2452
806	Minimum insertions to form a palindrome with permutations allowed	2448
807	Lowest Common Ancestor	2447
808	Check if a given array can represent Preorder Traversal of Binary Search Tree	2440
809	Minimum Distance Between BST Nodes Leetcode Solution	2438
810	Find Three Element From Different Three Arrays Such That a + b + c = sum	2437
811	Unique Binary Search Trees LeetCode Solution	2433
812	Find subarray with given sum (Handles Negative Numbers)	2428
813	Hamming Distance	2426
814	Count number of triplets with product equal to given number	2425
815	Largest Submatrix With Rearrangements LeetCode Solution	2423
816	Number Of Longest Increasing Subsequence	2421
817	Find K Length Subarray of Maximum Average	2418
818	Tree Traversal (Preorder, Inorder & Postorder)	2417
819	Valid Triangle Number LeetCode Solution	2412
820	Flatten 2D Vector LeetCode Solution	2409
821	Check if two nodes are on the same path in a Tree	2407
822	First Bad Version	2403
823	Find Common Characters Leetcode Solution	2402
824	Closest Leaf in a Binary Tree LeetCode Solution	2396
825	Employee Importance LeetCode Solution	2396
826	Find distance between two nodes of a Binary Tree	2394
827	Iterative Postorder Traversal Using Two Stacks	2394
828	Check Completeness of a Binary Tree LeetCode Solution	2393
829	Merging Two Sorted Arrays	2393
830	Third Maximum Number Leetcode Solution	2391
831	Find Peak Element	2388
832	Array Nesting Leetcode Solution	2387
833	Sort Elements by Frequency II	2381
834	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2379
835	Find Element Using Binary Search in Sorted Array	2379
836	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2378
837	Products of ranges in an array	2378
838	Print all triplets in sorted array that form AP	2377
839	Newman-Conway Sequence	2374
840	Maximum subsequence sum such that no three are consecutive	2371
841	Find Smallest Range Containing Elements from k Lists	2370
842	Valid Parenthesis String	2370
843	Diagonal Traversal of Binary Tree	2369
844	Print All Distinct Elements of a Given Integer Array	2364
845	Largest BST Subtree LeetCode Solution	2363
846	Maximum number of segments of lengths a, b and c	2359
847	Arrange given numbers to form the biggest number	2358
848	Longest Bitonic Subsequence	2357
849	Longest Palindromic Subsequence	2353
850	Distinct Subsequences	2353
851	Find Sum of all unique sub-array sum for a given array	2351
852	Print Right View of a Binary Tree	2350
853	Range Sum Query using Sparse Table	2343
854	Bottom View of a Binary Tree	2341
855	Find Nth Node	2340
856	Stone Game IV LeetCode Solution	2339
857	Lower Case To Upper Case	2337
858	Segment Tree	2335
859	Largest subarray with equal number of 0s and 1s	2334
860	Path Sum	2330
861	Largest divisible pairs subset	2325
862	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2322
863	Contiguous Array	2322
864	Trapping Rain Water II LeetCode Solution	2319
865	Number of siblings of a given Node in n-ary Tree	2317
866	Stone Game IV LeetCode Solution	2314
867	Four Elements that Sum to Given	2314
868	Subset Sum Problem in O(sum) space	2312
869	Shuffle an Array	2311
870	Binary array after M range toggle operations	2303
871	Median of Two Sorted Arrays	2301
872	Merge Two Sorted Arrays	2301
873	Find the largest multiple of 3	2296
874	Isomorphic Strings	2293
875	Unique Binary Search Trees	2286
876	Count and Say	2284
877	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2282
878	Permutations of a Given String Using STL	2282
879	Red-Black Tree Introduction	2278
880	Maximum Population Year LeetCode Solution	2270
881	Next Greater Element in an Array	2262
882	Valid Number	2261
883	Find Largest d in Array such that a + b + c = d	2260
884	Infix to Postfix	2255
885	Maximum Product Subarray	2253
886	Encoded String With Shortest Length LeetCode Solution	2247
887	Friends Pairing Problem	2246
888	Maximum Sum of 3 Non-Overlapping Subarrays	2243
889	Find unique character in a string	2241
890	Insert Delete GetRandom	2240
891	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2239
892	Transform a BST to Greater sum Tree	2238
893	Averages of Levels in Binary Tree	2238
894	Write a function to get the intersection point of two Linked Lists	2235
895	Count Primes in Ranges	2232
896	Closest Binary Search Tree Value Leetcode Solution	2228
897	Height of a generic tree from parent array	2225
898	Valid Perfect Square LeetCode Solution	2220
899	Orderly Queue LeetCode Solution	2218
900	The Number of Weak Characters in the Game LeetCode Solution	2216
901	Binary Search Tree Delete Operation	2215
902	Shuffle a given Array	2214
903	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2210
904	Range Minimum Query (Square Root Decomposition and Sparse Table)	2207
905	Sentence Screen Fitting LeetCode Solution	2203
906	Edit Distance	2192
907	Binary Tree Longest Consecutive Sequence LeetCode Solution	2186
908	Serialize and Deserialize Binary Tree	2186
909	Bold Words in String LeetCode Solution	2183
910	Minimum sum of squares of character counts in a given string after removing k characters	2182
911	Reorganize String	2176
912	Kth Smallest Number in Multiplication Table Leetcode Solution	2170
913	Convert BST into a Min-Heap without using array	2164
914	Find Minimum In Rotated Sorted Array	2161
915	Diameter of N-Ary Tree LeetCode Solution	2159
916	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2158
917	Next greater element	2158
918	Integer to Roman	2157
919	Swap Nodes In Pairs	2149
920	Lowest Common Ancestor in Binary Search Tree	2149
921	Maximum Product Subarray	2141
922	Next Greater Element II LeetCode Solution	2132
923	Array Queries for multiply replacements and product	2130
924	Advantages of BST over Hash Table	2126
925	Find the smallest binary digit multiple of given number	2125
926	K’th Largest element in BST using constant extra space	2121
927	K’th Largest Element in BST when modification to BST is not allowed	2121
928	Koko Eating Bananas LeetCode Solution	2117
929	Total Hamming Distance LeetCode Solution	2111
930	Write Code to Determine if Two Trees are Identical	2105
931	Print n terms of Newman-Conway Sequence	2105
932	Best Meeting Point LeetCode Solution	2103
933	Longest Increasing Consecutive Subsequence	2100
934	Check if an Array is Stack Sortable	2097
935	Constant time range add operation on an array	2096
936	Level Order Traversal of Binary Tree	2093
937	Queries on XOR of greatest odd divisor of the range	2091
938	Serialize and Deserialize Binary Tree LeetCode Solution	2089
939	Maximum Sum Increasing Subsequence	2081
940	Range Queries for Longest Correct Bracket Subsequence	2077
941	Image Overlap LeetCode Solution	2075
942	Number of Orders in the Backlog Leetcode Solution	2074
943	Clone a Binary Tree with Random Pointers	2068
944	Power of Two	2068
945	Reverse a Path in BST using Queue	2066
946	Moving Stones Until Consecutive Leetcode Solution	2065
947	Check if X can give change to every person in the Queue	2059
948	Greatest Sum Divisible by Three LeetCode Solution	2057
949	Find minimum number of merge operations to make an array palindrome	2057
950	Find the node with minimum value in a Binary Search Tree	2053
951	Design Underground System Leetcode Solution	2052
952	Valid Tic-Tac-Toe State LeetCode Solution	2051
953	A program to check if a binary tree is BST or not	2047
954	Numbers with prime frequencies greater than or equal to k	2045
955	Insert into a Sorted Circular Linked List LeetCode Solution	2037
956	Check if each internal node of a BST has exactly one child	2037
957	Count and Toggle Queries on a Binary Array	2035
958	Form minimum number from given sequence	2031
959	Factorial Trailing Zeroes LeetCode Solution	2023
960	Design Add and Search Words Data Structure LeetCode Solution	2022
961	Maximum Array from Two given Arrays Keeping Order Same	2022
962	Print Next Greater Number of Q queries	2019
963	Closest Binary Search Tree Value II LeetCode Solution	2015
964	Number of elements less than or equal to a given number in a given subarray	2015
965	Count the Pairs at Same Distance as in English Alphabets	2014
966	Collect maximum points in a grid using two traversals	2013
967	Graph Cloning	2010
968	Check for Palindrome after every character replacement Query	2006
969	Merge two BSTs with limited extra space	2001
970	Maximum difference between first and last indexes of an element in array	1999
971	Queries for Decimal Values of Subarrays of a Binary Array	1996
972	Largest Plus Sign Leetcode Solution	1995
973	Group Shifted Strings Leetcode Solution	1993
974	Merge Sorted Array	1989
975	Priority Queue	1977
976	Merge Sort	1976
977	Dividing Array into Pairs With Sum Divisible by K	1968
978	Longest Substring Without Repeating Characters Leetcode Solution	1961
979	Count even length binary sequences with same sum of first and second half bits	1955
980	Kth Smallest Element in a BST	1952
981	Cutting a Rod	1945
982	Print Ancestors of a Given Binary Tree Node Without Recursion	1943
983	Print modified array after multiple array range increment operations	1942
984	Form Minimum Number From Given Sequence	1936
985	Minimum Moves to Equal Array Elements LeetCode Solution	1933
986	Excel Sheet Column Number LeetCode Solution	1926
987	Guess The Word	1918
988	Swim in Rising Water LeetCode Solution	1917
989	Count Pairs Whose Products Exist in Array	1916
990	Find maximum average subarray of k length	1914
991	Unique Paths II	1908
992	Excel Sheet Column Title LeetCode Solution	1903
993	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1901
994	Binary Search Tree	1893
995	Print all Possible Ways to Break a String in Bracket Form	1891
996	Palindrome Partitioning	1888
997	How to print maximum number of A’s using given four keys	1887
998	K Empty Slots	1880
999	Check given array of size n can represent BST of n levels or not	1876
1000	Binary Search Tree Search and Insertion	1871
1001	Decrease Elements To Make Array Zigzag LeetCode Solution	1866
1002	Find postorder traversal of BST from preorder traversal	1858
1003	Longest Common Prefix using Character by Character Matching	1855
1004	Regular Expression Matching	1854
1005	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1852
1006	Sorted Array to Balanced BST	1848
1007	Sum of Left Leaves LeetCode Solution	1845
1008	Construct Complete Binary Tree from its Linked List Representation	1814
1009	Maximum Depth Of Binary Tree	1801
1010	Queries for Number of Distinct Elements in a Subarray	1800
1011	Find the Town Judge LeetCode Solution	1789
1012	Maximum weight transformation of a given string	1789
1013	Iterative method to find ancestors of a given binary tree	1782
1014	Binary Tree to Binary Search Tree Conversion using STL set	1765
1015	Symmetric Tree LeetCode Solution Leetcode Solution	1755
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1753
1017	Random Pick Index LeetCode Solution	1750
1018	Find Maximum Depth of Nested Parenthesis in a String	1748
1019	Data Structure Designing	1746
1020	Search in Sorted Rotated Array	1743
1021	Search an Element in Sorted Rotated Array	1711
1022	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1693
1023	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1678
1024	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1670
1025	Next Greater Element I Leetcode Solution	1648
1026	Print Maximum Length Chain of Pairs	1627
1027	Maximum Binary Tree	1605
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	1579
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1538