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	43667
2	Maximum occurring character in a string	19806
3	Plus One Leetcode Solution	19407
4	Valid Parentheses LeetCode Solution	19294
5	3Sum Leetcode Solution	17382
6	Merge Sorted Arrays Leetcode Solution	15384
7	First Repeating Element	15245
8	Single Number Leetcode Solution	14931
9	Count Primes Leetcode Solutions	14736
10	Pow(x, n) Leetcode Solution	14463
11	Sqrt(x) Leetcode Solution	14310
12	Meeting Rooms II LeetCode Solution	13398
13	Concatenation of Array LeetCode Solution	12864
14	Roman to Integer Leetcode Solution	12035
15	Valid Palindrome Leetcode Solution	11897
16	Search Insert Position Leetcode Solution	11822
17	Contains Duplicate II Leetcode Solution	11820
18	Palindrome Number LeetCode Solution	11620
19	Remove Duplicates from Sorted Array Leetcode Solution	11494
20	Jump Game Leetcode Solution	11225
21	Reverse Vowels of a String Leetcode Solution	11209
22	Intersection of Two Arrays II Leetcode Solution	11130
23	Longest Substring Without Repeating Characters LeetCode Solution	11119
24	Number of Good Pairs Leetcode Solution	11031
25	Spiral Matrix LeetCode Solution	10896
26	Kids With the Greatest Number of Candies Leetcode Solution	10828
27	House Robber Leetcode Solution	10798
28	Add Binary Leetcode Solution	10686
29	Maximum Subarray Leetcode Solution	10311
30	Number Of 1 bits	10207
31	Find the Maximum Repeating Number in Array	10053
32	Text Justification LeetCode Solution	9939
33	Move Zeroes LeetCode Solution	9849
34	Jewels and Stones Leetcode Solution	9826
35	Min Stack Leetcode Solution	9765
36	Power of Two Leetcode Solution	9600
37	Longest Palindromic Substring LeetCode Solution	9575
38	Shuffle String Leetcode Solution	9513
39	Permutations Leetcode Solution	9492
40	Evaluation of Postfix Expression	9361
41	Third Maximum Number Leetcode Solution	9360
42	Word Search Leetcode Solution	9358
43	Daily Temperatures Leetcode Solution	9333
44	Find All Numbers Disappeared in an Array Leetcode Solution	9329
45	Median of Two Sorted Arrays LeetCode Solution	9278
46	Next Permutation Leetcode Solution	9232
47	Search in Rotated Sorted Array Leetcode Solution	9204
48	Number of Islands LeetCode Solution	9099
49	Kth Missing Positive Number Leetcode Solution	9091
50	Maximum Profit in Job Scheduling Leetcode Solution	9086
51	Next Greater Element I Leetcode Solution	8990
52	Longest Common Prefix Leetcode Solution	8981
53	Frog Jump Leetcode Solution	8825
54	Valid Anagram Leetcode Solution	8723
55	Find Minimum Distance Between Two Numbers in an Array	8670
56	Running Sum of 1d Array Leetcode Solution	8638
57	Shuffle the Array Leetcode Solution	8590
58	Rotate Image LeetCode Solution	8581
59	Multiply Strings Leetcode Solution	8544
60	Combination Sum Leetcode Solution	8518
61	Can Place Flowers LeetCode Solution	8509
62	Count and Say Leetcode Solution	8453
63	House Robber II Leetcode Solution	8448
64	3Sum Closest LeetCode Solution	8372
65	Bulb Switcher LeetCode Solution	8345
66	Best Time to Buy and Sell Stock LeetCode Solution	8212
67	Koko Eating Bananas Leetcode Solution	8209
68	Excel Sheet Column Title Leetcode Solution	8172
69	Happy Number Leetcode Solution	8139
70	Subarray and Subsequence	8137
71	Isomorphic Strings Leetcode Solution	8111
72	Majority Element Leetcode Solution	8055
73	Integer to Roman Leetcode Solution	8003
74	Count Pairs With Given Sum	8002
75	Candy LeetCode Solution	8000
76	Missing Number Leetcode Solution	7998
77	Product of array except self	7929
78	Rotate String LeetCode Solution	7881
79	A Product Array Puzzle	7878
80	Strobogrammatic Number LeetCode Solution	7846
81	Reverse String Without Temporary Variable	7769
82	Is Subsequence Leetcode Solution	7750
83	Binary Search LeetCode Solution	7728
84	Find the Difference Leetcode Solution	7719
85	Find the Duplicate Number LeetCode Solution	7684
86	Expression Evaluation	7670
87	Find Common Characters Leetcode Solution	7652
88	Largest Number Leetcode Solution	7643
89	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7555
90	String to Integer (atoi) LeetCode Solution	7503
91	Subset Leetcode	7473
92	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7465
93	Rabin Karp Algorithm	7415
94	Summary Ranges Leetcode Solution	7393
95	Set Matrix Zeroes	7373
96	Word Pattern LeetCode Solution	7312
97	Balanced Binary Tree Leetcode Solution	7310
98	Sort Characters By Frequency LeetCode Solution	7275
99	Find the Town Judge Leetcode Solution	7255
100	Arranging Coins Leetcode Solution	7215
101	Unique Paths Leetcode Solution	7212
102	Find the Winner of the Circular Game LeetCode Solution	7191
103	Rearrange Positive and Negative Numbers Alternatively in Array	7142
104	Postfix to Infix Conversion	7079
105	Group Anagrams LeetCode Solution	7078
106	String Compression LeetCode Solution	7076
107	Asteroid Collision LeetCode Solution	7036
108	Page Replacement Algorithms in Operating Systems	6989
109	Repeated Substring Pattern LeetCode Solution	6954
110	Smallest window in a string containing all characters of another string	6942
111	Best Time to Buy and Sell Stock II Leetcode Solution	6885
112	Sort Colors LeetCode Solution	6884
113	Matrix Chain Multiplication using Dynamic Programming	6880
114	Sort Array By Parity LeetCode Solution	6736
115	Zigzag Conversion LeetCode Solution	6733
116	Sum of minimum and maximum elements of all subarrays of size k	6702
117	Kth largest element in an Array Leetcode Solutions	6695
118	Divide Two Integers Leetcode Solution	6682
119	Valid Palindrome II Leetcode Solution	6677
120	Generate Parentheses Leetcode Solution	6672
121	Assign Cookies Leetcode Solution	6589
122	Boolean Parenthesization Problem	6588
123	Find the Row with Maximum Number of 1’s	6573
124	Decode String Leetcode Solution	6564
125	Reverse Integer Leetcode Solution	6552
126	Remove Duplicates from Sorted Array II Leetcode Solution	6541
127	Pascal Triangle Leetcode	6540
128	Length of Last Word Leetcode Solution	6524
129	Product of Array Except Self LeetCode Solution	6510
130	H-Index Leetcode Solution	6484
131	Bus Routes Leetcode Solution	6470
132	Merge Two Sorted Lists Leetcode Solutions	6428
133	Number of Provinces Leetcode Solution	6427
134	Prefix to Infix Conversion	6371
135	Minimum Steps to reach target by a Knight	6352
136	Convert array into Zig-Zag fashion	6350
137	Linked List Cycle II LeetCode Solution	6346
138	Minimum Cost For Tickets Leetcode Solution	6325
139	Employee Free Time LeetCode Solution	6316
140	Defanging an IP Address Leetcode Solution	6312
141	Optimal Account Balancing LeetCode Solution	6306
142	Pascal’s Triangle II Leetcode Solution	6217
143	Find First and Last Position of Element in Sorted Array Leetcode Solution	6208
144	First element occurring k times in an array	6140
145	Implementation of Deque using Doubly Linked List	6133
146	Island Perimeter Leetcode Solution	6124
147	Increasing Triplet Subsequence LeetCode Solution	6123
148	Merge Sorted Array LeetCode Solution	6118
149	Build Array From Permutation Leetcode Solution	6110
150	Majority Element II Leetcode Solution	6085
151	Bellman Ford Algorithm	6080
152	Robot Room Cleaner Leetcode Solution	6058
153	OSI Model	6052
154	Max Consecutive Ones Leetcode Solution	6023
155	KMP Algorithm	5995
156	Find Pair with Given Difference	5986
157	Swap Nodes in Pairs Leetcode Solutions	5975
158	Check if the Elements of an Array are Consecutive	5966
159	Set Matrix Zeroes Leetcode Solution	5959
160	K-th Smallest Element in a Sorted Matrix	5939
161	Add Two Numbers II Leetcode Solution	5919
162	Find the Missing Number	5911
163	Guess Number Higher or Lower LeetCode Solution	5902
164	Lemonade Change Leetcode Solution	5877
165	Trapping Rain Water Leetcode Solution	5869
166	First negative integer in every window of size k	5868
167	Design Parking System Leetcode Solution	5858
168	Fibonacci Number LeetCode Solution	5855
169	Subarray Sum Equals K LeetCode Solution	5845
170	Delete middle element of a stack	5833
171	Word Ladder LeetCode Solution	5805
172	First Unique Character in a String LeetCode Solution	5775
173	Last Stone Weight	5773
174	Coin Change 2 Leetcode Solution	5756
175	Length of the largest subarray with contiguous elements	5751
176	Subarray with Given Sum	5750
177	Find All Duplicates in an Array LeetCode Solution	5745
178	Monotonic Array LeetCode Solution	5740
179	Subarray Product Less Than K LeetCode Solution	5734
180	Capacity To Ship Packages Within D Days Leetcode Solution	5728
181	String Compression	5726
182	Palindrome Linked List Leetcode Solution	5706
183	Repeated Substring Pattern	5682
184	Form Minimum Number from Given Sequence of D’s and I’s	5673
185	Single Element in a Sorted Array LeetCode Solution	5661
186	Find Smallest Missing Number in a Sorted Array	5627
187	Remove Duplicates from Sorted List II LeetCode Solution	5582
188	01 Matrix LeetCode Solution	5576
189	Combinations Leetcode Solution	5569
190	Continuous Subarray Sum LeetCode Solution	5564
191	Prefix to Postfix Conversion	5557
192	Leetcode Permutations	5533
193	Combination Sum	5516
194	Reverse Words in a String III LeetCode Solution	5509
195	Valid Perfect Square Leetcode Solution	5507
196	Iterative Implementation of Quick Sort	5496
197	Same Tree LeetCode Solution	5481
198	Break a Palindrome LeetCode Solution	5476
199	Merge k Sorted Lists Leetcode Solution	5427
200	Remove Linked List Elements Leetcode Solution	5420
201	Slowest Key Leetcode Solution	5403
202	Relative Ranks Leetcode Solution	5397
203	Top K Frequent Elements LeetCode Solution	5392
204	Insert Delete GetRandom O(1) Leetcode Solution	5382
205	Rotate List Leetcode Solution	5379
206	Container With Most Water LeetCode Solution	5367
207	Backspace String Compare	5365
208	Contains Duplicate LeetCode Solution	5356
209	Find Peak Element LeetCode Solution	5334
210	Maximum Product of Three Numbers LeetCode Solution	5333
211	Cuckoo sequence program	5285
212	Find the Duplicate Element	5271
213	The K Weakest Rows in a Matrix Leetcode Solution	5250
214	Printing brackets in Matrix Chain Multiplication Problem	5248
215	Palindrome Number	5240
216	Kth Largest Element in a Stream Leetcode Solution	5236
217	Subarray Sum Equals k	5218
218	Longest Common Subsequence LeetCode Solution	5212
219	Second Most Repeated Word in a Sequence	5209
220	Max Area of Island	5184
221	Remove All Occurrences of a Substring LeetCode Solution	5181
222	Rearrange given Array in Maximum Minimum Form	5162
223	Find Leaders in an Array	5158
224	Relative Sort Array Leetcode Solution	5140
225	Permutation in String Leetcode Solution	5128
226	Generate all Binary Strings Without Consecutive 1’s	5126
227	Make The String Great Leetcode Solution	5120
228	Unique Paths II Leetcode Solution	5118
229	Convert a Number to Hexadecimal Leetcode Solution	5111
230	Arithmetic Expression Evaluation	5107
231	Check If Two String Arrays are Equivalent Leetcode Solution	5102
232	Scramble String	5096
233	Target Sum	5077
234	Delete Node in a Linked List Leetcode Solution	5073
235	N-Queens LeetCode Solution	5058
236	Letter Combinations of a Phone Number	5055
237	Time Based Key-Value Store LeetCode Solution	5046
238	Construct Binary Tree from Given Inorder and Preorder Traversals	5034
239	Moving Average from Data Stream Leetcode Solution	5033
240	Find Triplet in Array With a Given Sum	5011
241	Next Permutation	4999
242	Count Good Nodes in Binary Tree Leetcode Solution	4997
243	Stone Game LeetCode	4996
244	LRU Cache LeetCode Solution	4987
245	Number of Dice Rolls With Target Sum LeetCode Solution	4984
246	Find N Unique Integers Sum up to Zero Leetcode Solution	4961
247	Check If N and Its Double Exist Leetcode Solution	4948
248	Given two unsorted arrays find all pairs whose sum is x	4931
249	Prim’s Algorithm	4907
250	Number of Steps to Reduce a Number to Zero Leetcode Solution	4900
251	Flipping an Image LeetCode Solution	4895
252	Remove Minimum Characters so that Two Strings Become Anagrams	4893
253	Minimum Operations to convert X to Y	4887
254	Minimum swaps required to bring all elements less than or equal to k together	4870
255	Min Stack	4869
256	Stock Buy Sell to Maximize Profit	4852
257	Top K Frequent Elements	4851
258	Find The Duplicate Number	4849
259	Minimum Knight Moves LeetCode Solution	4845
260	Min Cost Climbing Stairs LeetCode Solution	4835
261	Reverse Only Letters LeetCode Solution	4830
262	Student Attendance Record I Leetcode Solution	4807
263	To Lower Case Leetcode Solution	4774
264	Smallest Positive Number Missing in an Unsorted Array	4766
265	Single Number	4759
266	Maximum Sum Increasing Subsequence	4747
267	Maximum Subarray Sum using Divide and Conquer	4741
268	License Key Formatting Leetcode Solution	4739
269	Reverse words in a string	4739
270	The kth Factor of n Leetcode Solution	4731
271	Maximum Population Year LeetCode Solution	4681
272	Longest Common Subsequence	4640
273	Find the Number Occurring Odd Number of Times in an Array	4626
274	Top K Frequent Words LeetCode Solution	4624
275	Remove Nth Node From End of List Leetcode Solution	4615
276	Search Suggestions System LeetCode Solution	4606
277	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4602
278	Reformat Date LeetCode Solution	4590
279	BFS for Disconnected Graph	4586
280	Minimum Path Sum Leetcode Solution	4584
281	Find Words That Can Be Formed by Characters Leetcode Solution	4576
282	Sum of Subarray Ranges Leetcode Solution	4558
283	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4552
284	Best Time to Buy and Sell Stock III Leetcode Solution	4533
285	Maximum Depth of Binary Tree Leetcode Solution	4532
286	Reveal Cards In Increasing Order Leetcode Solution	4527
287	Intersection of Two Arrays	4506
288	N-th Tribonacci Number Leetcode Solution	4496
289	House Robber	4487
290	Sort Elements by Frequency of Occurrences	4479
291	Diagonal Traverse LeetCode Solution	4469
292	Find any one of the multiple repeating elements in read only array	4467
293	Maximize Distance to Closest Person LeetCode Solution	4457
294	Evaluate Division	4457
295	Reverse individual words	4456
296	Sudoku Solver	4455
297	Reverse Nodes in k-Group LeetCode Solution	4448
298	Maximum Size Subarray Sum Equals k Leetcode Solution	4448
299	Most Frequent Element in an Array	4439
300	Minimum Characters to be Added at Front to Make String Palindrome	4432
301	Length of Longest valid Substring	4424
302	Last Stone Weight II LeetCode Solution	4421
303	Design A Leaderboard Leetcode Solution	4419
304	Find if Path Exists in Graph Leetcode Solution	4413
305	Count Number of Occurrences in a Sorted Array	4413
306	Count of index pairs with equal elements in an array	4406
307	Range Sum Query 2D – Immutable Leetcode Solution	4399
308	Remove All Ones With Row and Column Flips Leetcode Solution	4398
309	Remove Duplicates from Sorted List LeetCode Solution	4397
310	Binary Tree Inorder Traversal LeetCode Solution	4388
311	Minimum number of Merge Operations to make an Array Palindrome	4382
312	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4375
313	Implement a stack using single queue	4358
314	Find the Closest Palindrome number	4323
315	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4320
316	Split Linked List in Parts Leetcode Solution	4317
317	Brightest Position on Street LeetCode Solution	4307
318	Mobile Numeric Keypad Problem	4293
319	Find Leaves of Binary Tree LeetCode Solution	4283
320	Spiral Matrix II Leetcode Solution	4279
321	Special Positions in a Binary Matrix Leetcode Solution	4276
322	Reverse Bits	4268
323	Invalid Transactions LeetCode Solution	4251
324	Arrange given Numbers to Form the Biggest Number II	4251
325	Symmetric Tree Leetcode Solution	4246
326	Shortest Word Distance Leetcode Solution	4243
327	Maximum Subarray	4234
328	Paint House LeetCode Solution	4227
329	Round Robin Scheduling	4227
330	Dijkstra Algorithm	4226
331	Sort Array By Parity II Leetcode Solution	4192
332	Diagonal Traversal LeetCode Solution	4191
333	Find Duplicates in an Array in Most Efficient Way	4182
334	One Edit Distance LeetCode Solution	4168
335	Rank Transform of an Array Leetcode Solution	4162
336	Partition Labels LeetCode Solution	4145
337	Largest Rectangle in Histogram LeetCode Solution	4144
338	Hamming Distance Leetcode Solution	4142
339	Remove Invalid Parentheses Leetcode Solution	4140
340	Binary Tree Zigzag Level Order Traversal LeetCode Solution	4137
341	Maximal Square	4133
342	String Matching in an Array Leetcode Solution	4132
343	Unique Paths	4127
344	Minimum Moves to Equal Array Elements Leetcode Solution	4123
345	Jump Game	4123
346	Tug of War	4122
347	Alien Dictionary LeetCode Solution	4118
348	Recursion	4102
349	The Celebrity Problem	4097
350	Minimum Time to Collect All Apples in a Tree LeetCode Solution	4089
351	Find Winner on a Tic Tac Toe Game Leetcode Solution	4085
352	Postfix to Prefix Conversion	4068
353	Validate Stack Sequences LeetCode Solution	4065
354	Next Permutation LeetCode Solution	4065
355	Construct BST from its given Level Order Traversal	4064
356	Range Sum of BST LeetCode Solution	4057
357	Lowest Common Ancestor of a Binary Tree Leetcode Solution	4053
358	Bitwise AND of Numbers Range LeetCode Solution	4053
359	Minimum operation to make all elements equal in array	4050
360	Merge Two Sorted Linked Lists	4050
361	Unique Paths III LeetCode Solution	4046
362	Least Number of Unique Integers after K Removals Leetcode Solution	4045
363	Smallest Subarray with k Distinct Numbers	4037
364	Given an Array of Pairs Find all Symmetric Pairs in it	4031
365	Count of Triplets With Sum Less than Given Value	4030
366	Minimum Depth of Binary Tree Leetcode Solution	4028
367	Pair of Positive Negative Values in an Array	4024
368	Minimum Time Visiting All Points Leetcode Solution	4020
369	Invert Binary Tree LeetCode Solution	4016
370	Maximum Circular Subarray Sum	4015
371	Transpose Graph	4014
372	Longest Common Prefix using Trie	4007
373	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	4006
374	Check whether Strings are K Distance Apart or Not	3985
375	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3978
376	Find minimum difference between any two elements	3975
377	Next Greater Element III LeetCode Solution	3968
378	Minimum Cost to Hire K Workers	3967
379	K Empty Slots LeetCode	3966
380	Robot Bounded In Circle LeetCode Solution	3965
381	Clone Graph LeetCode Solution	3959
382	Substring with Concatenation of All Words Leetcode Solution	3958
383	Kruskal Algorithm	3957
384	Check if a given array contains duplicate elements within k distance from each other	3953
385	Toeplitz Matrix	3950
386	Ugly Number II LeetCode Solution	3947
387	Longest Substring with At Most K Distinct Characters LeetCode Solution	3934
388	Implementation of Deque using circular array	3924
389	3 Sum	3920
390	Longest subarray not having more than K distinct elements	3916
391	Sort a stack using a temporary stack	3915
392	Minimize Maximum Pair Sum in Array LeetCode Solution	3910
393	LRU Cache Implementation	3908
394	Stack Permutations (Check if an array is stack permutation of other)	3905
395	Find the First and Second Smallest Elements	3905
396	Graph Valid Tree LeetCode Solution	3900
397	Invert Binary Tree LeetCode Solution	3898
398	Word Search	3898
399	Regular Expression Matching Regular Expression Matching LeetCode Solution	3897
400	Sliding Window Technique	3888
401	Permutation Sequence LeetCode Solution	3885
402	Longest subsequence such that difference between adjacents is one	3885
403	Non-decreasing Array LeetCode Solution	3878
404	Find the subarray with least average	3877
405	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3873
406	Kth Smallest Element in a BST Leetcode Solution	3865
407	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3859
408	Design Browser History LeetCode Solution	3858
409	Find the Smallest Divisor given a Threshold Leetcode Solution	3854
410	Stone Game II Leetcode	3852
411	Priority Queue using doubly linked list	3850
412	4Sum	3847
413	Number of Islands II LeetCode Solution	3844
414	Max stack	3842
415	Missing Element in Sorted Array LeetCode Solution	3841
416	Find duplicates in a given array when elements are not limited to a range	3839
417	Top View of Binary Tree	3834
418	Queries for counts of array elements with values in given range	3823
419	Number Complement Leetcode Solution	3820
420	K Closest Points to Origin Leetcode Solution	3814
421	Path With Maximum Minimum Value LeetCode Solution	3810
422	Common elements in all rows of a given matrix	3810
423	First Circular Tour to Visit all the Petrol Bunks	3810
424	Minesweeper LeetCode Solution	3809
425	Partition List Leetcode Solution	3807
426	LRU Cache Leetcode Solution	3804
427	Painting Fence Algorithm	3804
428	Maximum Number of Occurrences of a Substring Leetcode Solution	3801
429	Find Top K (or Most Frequent) Numbers in a Stream	3796
430	Find the Peak Element from an Array	3794
431	Number of Smaller Elements on Right Side	3791
432	Nth Catalan Number	3785
433	Sequences of given length where every element is more than or equal to twice of previous	3782
434	Find Maximum Level sum in Binary Tree	3781
435	Fibonacci Number LeetCode Solution	3780
436	Snakes and Ladders LeetCode Solution	3777
437	Can Make Arithmetic Progression From Sequence Leetcode Solution	3775
438	Combination Sum IV LeetCode Solution	3767
439	Search a 2D Matrix II Leetcode Solution	3763
440	Sliding Window Maximum LeetCode Solution	3760
441	Sort elements by frequency	3757
442	Maximum Consecutive Numbers Present in an Array	3746
443	High Five LeetCode Solution	3745
444	Integer Break LeetCode Solution	3745
445	Tiling Problem	3730
446	Count items common to both the lists but with different prices	3730
447	Insert Interval Leetcode Solution	3729
448	Odd Even Linked List Leetcode Solution	3728
449	Flood Fill LeetCode	3721
450	Check if Two given Strings are Isomorphic to each other	3720
451	Find Minimum in Rotated Sorted Array II LeetCode Solution	3719
452	Rearrange array such that even positioned are greater than odd	3715
453	Distance of nearest cell having 1 in a binary matrix	3711
454	Longest Palindrome can be Formed by Removing or Rearranging Characters	3709
455	Move All the Zeros to the End of the Given Array	3709
456	Gold Mine Problem	3706
457	Shortest Palindrome	3700
458	Interval Tree	3698
459	Consecutive Characters LeetCode Solution	3693
460	Search in a Binary Search Tree Leetcode Solution	3684
461	Insert into a Binary Search Tree Leetcode Solution	3678
462	Kth Non-repeating Character	3670
463	N queen problem	3668
464	Design a stack that supports getMin() in O(1) time and O(1) extra space	3662
465	Number of Closed Islands Leetcode Solution	3648
466	Spiral Matrix III LeetCode Solution	3648
467	Expression Contains Redundant Bracket or Not	3644
468	Find a Peak Element II LeetCode Solution	3642
469	Replace Elements with Greatest Element on Right Side Leetcode Solution	3640
470	Minimum Absolute Difference in BST Leetcode Solution	3639
471	Decompress Run-Length Encoded List Leetcode Solution	3637
472	Trapping Rain Water LeetCode Solution	3634
473	Integer to English words	3624
474	Longest Common Prefix using Sorting	3624
475	Check If Array Pairs Are Divisible by k LeetCode Solution	3615
476	Evaluate Reverse Polish Notation LeetCode Solution	3614
477	Queries for GCD of all numbers of an array except elements in a given range	3614
478	Coin Change Problem	3610
479	Sort Colors	3606
480	Restore IP Addresses Leetcode Solution	3605
481	Convert Sorted Array to Binary Search Tree Leetcode Solution	3605
482	Minimum Path Sum	3604
483	Sliding Window Median Leetcode Solution	3603
484	Find Pythagorean Triplets from Array	3596
485	Find All Possible Recipes from Given Supplies LeetCode Solution	3594
486	Sort an array according to the order defined by another array	3588
487	Binary Tree Maximum Path Sum LeetCode Solution	3582
488	Sorting array using Stacks	3579
489	Balanced Expression with Replacement	3576
490	Reverse a linked list	3573
491	Fibonacci numbers	3570
492	Vertical Order Traversal of Binary Tree LeetCode Solution	3564
493	Palindrome Substring Queries	3561
494	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3555
495	Priority Queue in C++	3550
496	Majority Element	3548
497	Best Time to Buy and Sell Stock	3546
498	Cells with Odd Values in a Matrix LeetCode Solution	3527
499	Number of Days Between Two Dates LeetCode Solution	3521
500	Subset sum problem	3521
501	Multiplication of Two Matrices	3520
502	Camelcase Matching Leetcode Solution	3518
503	Queue using Stacks	3515
504	Find Median from Data Stream LeetCode Solution	3511
505	Path Crossing Leetcode Solution	3509
506	Is Graph Bipartite? LeetCode Solution	3508
507	Find the first Repeating Number in a Given Array	3505
508	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3495
509	The Stock Span Problem	3494
510	Sieve of Eratosthenes	3493
511	Path Sum II LeetCode Solution	3492
512	How to Implement Stack Using Priority Queue or Heap?	3484
513	Design Hit Counter LeetCode Solution	3480
514	Morris Traversal	3469
515	Analyze User Website Visit Pattern LeetCode Solution	3466
516	Count Submatrices With All Ones LeetCode Solution	3462
517	Kth ancestor of a node in binary tree	3462
518	Shortest Completing Word Leetcode Solution	3459
519	Generate all Binary Strings from Given Pattern	3458
520	Largest rectangular sub-matrix whose sum is 0	3457
521	Divide Chocolate LeetCode Solution	3456
522	Longest Increasing Path in a Matrix LeetCode Solution	3456
523	Intersection of Two Linked Lists LeetCode Solution	3456
524	Pancake Sorting Problem	3455
525	Detect a loop in the Linked List	3452
526	Custom Sort String Leetcode Solution	3448
527	Count subarrays having total distinct elements same as original array	3445
528	Find a Fixed Point in a Given Array	3429
529	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3424
530	Group Anagrams	3421
531	Check if Array Contains Contiguous Integers With Duplicates Allowed	3420
532	Monotonic Array Leetcode Solution	3419
533	Different Ways to Add Parentheses Leetcode Solution	3419
534	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3410
535	Construction of Longest Increasing Subsequence (N log N)	3407
536	Queue based approach for first non-repeating character in a stream	3402
537	Implement strStr() LeetCode Solution	3401
538	Letter Case Permutation	3401
539	Minimum Height Trees	3401
540	Valid Boomerang Leetcode Solution	3396
541	Scramble String LeetCode Solution	3395
542	Maximum Element in an Array which is Increasing and then Decreasing	3393
543	Decode Ways	3387
544	Perfect Squares LeetCode Solution	3386
545	Merge Overlapping Intervals	3386
546	How to Create Mergable Stack?	3375
547	Nearest Exit from Entrance in Maze LeetCode Solution	3371
548	Shifting Letters LeetCode Solution	3365
549	Number of Distinct Islands Leetcode Solution	3362
550	Reorder Data in Log Files LeetCode Solution	3358
551	First missing positive	3357
552	Find the Lost Element From a Duplicated Array	3357
553	Implement Trie (Prefix Tree) Leetcode Solution	3354
554	Find maximum length Snake sequence	3353
555	Binary Tree zigzag level order Traversal	3345
556	Best Time to Buy and Sell Stock IV LeetCode Solution	3344
557	LCS (Longest Common Subsequence) of three strings	3340
558	Sliding Window Maximum	3340
559	Race Car LeetCode Solution	3337
560	Maximum Sum of Non Consecutive Elements	3335
561	Sort a stack using recursion	3332
562	Champagne Tower LeetCode Solution	3328
563	Longest Common Prefix using Divide and Conquer	3324
564	Find if an Expression has Duplicate Parenthesis or Not	3323
565	Insert Node in the Sorted Linked List	3323
566	Most Stones Removed with Same Row or Column LeetCode Solution	3321
567	Build an Array With Stack Operations Leetcode Solution	3321
568	Number of Equivalent Domino Pairs Leetcode Solution	3320
569	Recover Binary Search Tree	3320
570	Count Possible Triangles	3320
571	Decode String	3318
572	Design Skiplist LeetCode Solution	3317
573	Largest Subarray with Equal Number of 0’s and 1’s	3302
574	Guess Number Higher or Lower II	3292
575	Contiguous Array LeetCode Solution	3290
576	Smallest Good Base	3290
577	Palindrome Permutation LeetCode Solution	3285
578	Minimum Bracket Reversals	3284
579	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3281
580	All Possible Full Binary Trees LeetCode Solution	3278
581	Find a Sorted Subsequence of size 3	3277
582	Maximum Length of Chain Pairs	3276
583	Longest Repeated Subsequence	3259
584	Rectangle Overlap LeetCode Solution	3257
585	Find the two Numbers with Odd Occurrences in an Unsorted Array	3256
586	Merge Two Binary Trees LeetCode Solution	3254
587	Longest Substring with At Least K Repeating Characters LeetCode Solution	3252
588	Recover Binary Search Tree Leetcode Solution	3250
589	Maximum Depth of N-ary Tree Leetcode Solution	3250
590	Maximum Number of Ways to Partition an Array LeetCode Solution	3249
591	Distance Between Bus Stops Leetcode Solution	3249
592	Minimum Height Trees LeetCode Solution	3241
593	Find the Town Judge LeetCode Solution	3239
594	Rearrange Spaces Between Words Leetcode Solution	3238
595	Palindrome Partitioning Leetcode Solution	3237
596	Design a Stack With Increment Operation Leetcode Solution	3237
597	Implement Two Stacks in an Array	3230
598	Print all Palindromic Partitions of a String	3229
599	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3228
600	Reorder an Array According to the Given Indexes	3218
601	K-th Distinct Element in an Array	3214
602	Minimum number of jumps to reach end	3212
603	Check for Balanced Parentheses in an Expression	3209
604	Valid Parentheses Leetcode Solution	3204
605	Subarrays with K Different Integers Leetcode Solution	3201
606	The Maze III LeetCode Solution	3195
607	Mean of Array After Removing Some Elements Leetcode Solution	3179
608	Maximum sum rectangle in a 2D matrix	3179
609	Sort a String According to Another String	3178
610	Maximize Elements Using Another Array	3174
611	Find the First Circular Tour that visits all the Petrol Pumps	3174
612	Jump Game IV LeetCode Solution	3173
613	Count pair with Given Sum	3166
614	Maximum Score After Splitting a String Leetcode Solution	3160
615	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	3156
616	Contains Duplicate	3153
617	Perform String Shifts Leetcode	3152
618	Heap Sort	3150
619	Valid Sudoku	3137
620	Word Break	3136
621	Merge Overlapping Intervals II	3136
622	Find the Minimum Element in a Sorted and Rotated Array	3123
623	Find First and Last Position of Element in Sorted Array LeetCode Solution	3117
624	Iterative Method to find Height of Binary Tree	3116
625	Possible Bipartition LeetCode Solution	3115
626	Convert BST to Min Heap	3115
627	A Space Optimized DP solution for 0-1 Knapsack Problem	3109
628	Palindrome Permutations of a String	3109
629	Edit Distance LeetCode Solution	3107
630	Minimum Jumps to Reach Home LeetCode Solution	3107
631	Palindrome Permutation	3107
632	Huffman Coding	3104
633	Find Largest Value in Each Tree Row LeetCode Solution	3101
634	Count Sub Islands LeetCode Solution	3085
635	Palindromic Substrings Leetcode Solution	3079
636	All Unique Triplets that Sum up to a Given Value	3079
637	Best Meeting Point LeetCode Solution	3072
638	Segregate 0s and 1s in an Array	3071
639	Number of palindromic paths in a matrix	3066
640	Reach a Number LeetCode Solution	3058
641	Maximum Product of Splitted Binary Tree LeetCode Solution	3057
642	Find Median from data Stream	3057
643	Find the Subarray of given length with Least Average	3054
644	Caesar Cipher	3053
645	Merge Two Balanced Binary Search Trees	3050
646	Level order Traversal in Spiral Form	3048
647	My Calendar I LeetCode Solution	3043
648	Check if the given array can represent Level Order Traversal of Binary Search Tree	3039
649	Pair with given product	3032
650	Word Pattern	3031
651	Find all triplets with zero sum	3027
652	Brick Wall LeetCode Solution	3017
653	Sorted Linked List to Balanced BST	3017
654	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	3009
655	Partition Problem	3009
656	Count Good Nodes in Binary Tree LeetCode Solution	3006
657	Construct BST from given Preorder Traversal	2996
658	Validate Binary Search Tree	2994
659	Alien Dictionary	2988
660	Swapping Nodes in a Linked List Leetcode Solution	2985
661	Add two numbers	2979
662	Merge K Sorted Arrays and Print Sorted Output	2979
663	Isomorphic Strings LeetCode Solution	2975
664	Minimum time required to rot all oranges	2975
665	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2974
666	Find whether a subarray is in form of a mountain or not	2974
667	Breadth First Search (BFS) for a Graph	2970
668	Convert Sorted List to Binary Search Tree	2969
669	Print Fibonacci sequence using 2 variables	2963
670	Maximize Sum of Array after K Negations Leetcode Solution	2961
671	How to Efficiently Implement k Stacks in a Single Array?	2956
672	Find all pairs (a, b) in an array such that a % b = k	2953
673	Count Distinct Elements in Every Window of Size K	2953
674	Queries on Probability of Even or Odd Number in given Ranges	2951
675	Sort 0s 1s and 2s in an Array	2951
676	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2946
677	Longest Subarray Having Count of 1s One More than Count of 0s	2944
678	Rotate Array	2943
679	Largest Sum Contiguous Subarray	2940
680	Bubble sort using two Stacks	2935
681	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2934
682	Range Sum Query 2D – Immutable LeetCode Solution	2927
683	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2923
684	Maximum Frequency Stack Leetcode Solution	2922
685	Maximum Number of Chocolates to be Distributed Equally Among k Students	2921
686	Detect Capital Leetcode Solution	2919
687	Split Array Into Consecutive Subsequences	2913
688	Find four elements that sum to a given value (Hashmap)	2911
689	Remove brackets from an algebraic string containing + and – operators	2911
690	Count ways to reach the nth stair using step 1, 2 or 3	2900
691	Binary Tree Right Side View LeetCode Solution	2899
692	Binary Tree to Binary Search Tree Conversion	2895
693	Counting Bits	2891
694	Minimum Swaps to Group All 1’s Together Leetcode Solution	2890
695	Difference Array \| Range update query in O(1)	2890
696	Remove duplicates from sorted array	2885
697	Length of Longest Fibonacci Subsequence	2885
698	Merge Two Sorted Lists Leetcode	2882
699	Remove Palindromic Subsequences Leetcode Solution	2879
700	Partition Equal Subset Sum	2875
701	Print all subarrays with 0 sum	2872
702	Partition to K Equal Sum Subsets Leetcode Solution	2865
703	Populating Next Right Pointers in Each Node Leetcode Solution	2862
704	Minimum Sum Path in a Triangle	2854
705	Populating Next Right Pointers in Each Node	2854
706	Find pairs with given sum such that elements of pair are in different rows	2852
707	Happy Number	2851
708	Topological Sorting	2851
709	Check if a Linked list of Strings form a Palindrome	2848
710	Elements Appear more than N/K times in Array	2847
711	Arithmetic Slices II – Subsequence LeetCode Solution	2839
712	String comparison containing wildcards	2836
713	Queue Reconstruction by Height	2827
714	Find All Pairs With a Given Difference	2826
715	Contiguous Array Leetcode	2824
716	Concatenation of Array LeetCode Solution	2820
717	Reverse Nodes in K-Group	2819
718	Web Crawler LeetCode Solution	2807
719	Inorder Successor of a node in Binary Tree	2799
720	Maximum Distance in Array	2790
721	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2787
722	Increasing Subsequence of Length three with Maximum Product	2786
723	Find Duplicate Subtrees	2784
724	Swap Kth Node from beginning with Kth Node from End	2774
725	Minimum Swaps to Make Strings Equal Leetcode Solution	2768
726	Root to Leaf path with target sum Leetcode Solutions	2767
727	Finding K closest element	2760
728	Score of Parenthesis LeetCode Solution	2758
729	MiniMax Algorithm	2756
730	Check if String Follows Order of Characters by a Pattern or not	2755
731	Longest Common Prefix Using Binary Search II	2753
732	Given a binary tree, how do you remove all the half nodes?	2750
733	An Interesting Method to generate Binary Numbers from 1 to n	2747
734	Symmetric Tree	2745
735	Climbing stairs	2745
736	Maximum Product Subarray II	2741
737	Longest Increasing Subsequence	2736
738	Find the first repeating element in an array of integers	2735
739	Construct Binary Tree from given Parent Array representation	2733
740	Pancake Sorting	2731
741	Container with Most Water	2728
742	Count Minimum Steps to Get the given Array	2724
743	Union and Intersection of two Linked Lists	2723
744	Deletion in a Binary Tree	2722
745	Find K Closest Elements LeetCode Solution	2719
746	Parallel Courses II LeetCode Solution	2718
747	Iterative Preorder Traversal	2711
748	Delete Nth node from the end of the given linked list	2711
749	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2704
750	BFS vs DFS for Binary Tree	2695
751	Delete Nodes and Return Forest Leetcode Solution	2690
752	Check if all levels of two Binary Tree are anagrams or not	2690
753	Sum Root to Leaf Numbers LeetCode Solution	2686
754	Kill Process LeetCode Solution	2682
755	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2681
756	Substring With Concatenation Of All Words	2681
757	Level order traversal using two Queues	2678
758	Level of Each node in a Tree from source node	2676
759	Count pairs from two linked lists whose sum is equal to a given value	2674
760	Boundary Traversal of binary tree	2673
761	Nested List Weight Sum II LeetCode Solution	2671
762	Rearrange an Array Such that arr[i] is equal to i	2669
763	Find Maximum of Minimum for Every Window Size in a Given Array	2666
764	Iterative Depth First Traversal of Graph	2660
765	Minimum Remove to Make Valid Parentheses LeetCode Solution	2658
766	Find the Difference Leetcode Solution	2654
767	Super Ugly Number	2654
768	Sort Array by Increasing Frequency Leetcode Solution	2653
769	Non-overlapping sum of two sets	2651
770	Linked List Cycle	2651
771	Minimum Size Subarray Sum	2650
772	Valid Anagrams	2646
773	New 21 Game	2646
774	Remove Duplicates from Sorted List II	2641
775	Longest Common Prefix Word by Word Matching	2638
776	Matrix Chain Multiplication	2636
777	Merge K Sorted Linked Lists	2631
778	K maximum sums of overlapping contiguous sub-arrays	2626
779	Merging Intervals	2619
780	Maximum size subarray sum equals k	2618
781	Range LCM Queries	2617
782	Reservoir Sampling	2617
783	Reorder Array Using Given Indexes	2610
784	Palindrome Partitioning	2607
785	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2603
786	Check if any two intervals overlap among a given set of intervals	2603
787	Print a Binary Tree in Vertical Order	2600
788	Maximum Product Subarray	2593
789	Balanced Binary Tree	2589
790	Tree Traversal (Preorder, Inorder & Postorder)	2589
791	Create Maximum Number	2585
792	Sorting a K Sorted Array	2583
793	Flatten Binary Tree to Linked List LeetCode Solution	2577
794	Verify Preorder Serialization of a Binary Tree	2577
795	The Painter’s Partition Problem	2575
796	Missing Number	2574
797	Friends Of Appropriate Ages LeetCode Solution	2572
798	Check if a queue can be sorted into another queue using a stack	2572
799	Find Maximum Sum Possible Equal Sum of Three Stacks	2566
800	Defanging an IP Address LeetCode Solution	2563
801	Check if Two Expressions With Brackets are Same	2563
802	Maximum difference between two elements such as larger element comes after smaller	2563
803	Peak Index in a Mountain Array LeetCode Solution	2559
804	Smallest Range II Leetcode Solution	2554
805	Valid Triangle Number LeetCode Solution	2543
806	Hamming Distance	2541
807	Unique Binary Search Trees LeetCode Solution	2538
808	Valid Triangle Number LeetCode Solution	2536
809	Minimum insertions to form a palindrome with permutations allowed	2535
810	Vertical sum in a given binary tree	2534
811	Find Three Element From Different Three Arrays Such That a + b + c = sum	2533
812	Lowest Common Ancestor	2531
813	Check if a given array can represent Preorder Traversal of Binary Search Tree	2529
814	Find Sum of all unique sub-array sum for a given array	2527
815	Count number of triplets with product equal to given number	2526
816	Iterative Postorder Traversal Using Two Stacks	2520
817	Largest Submatrix With Rearrangements LeetCode Solution	2519
818	Find K Length Subarray of Maximum Average	2519
819	Find subarray with given sum (Handles Negative Numbers)	2518
820	Minimum Distance Between BST Nodes Leetcode Solution	2517
821	Check if two nodes are on the same path in a Tree	2515
822	Number Of Longest Increasing Subsequence	2511
823	Sort Elements by Frequency II	2506
824	Find Element Using Binary Search in Sorted Array	2504
825	Find Common Characters Leetcode Solution	2495
826	Merging Two Sorted Arrays	2495
827	Find distance between two nodes of a Binary Tree	2490
828	First Bad Version	2490
829	Newman-Conway Sequence	2488
830	Third Maximum Number Leetcode Solution	2482
831	Check Completeness of a Binary Tree LeetCode Solution	2481
832	Flatten 2D Vector LeetCode Solution	2478
833	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2478
834	Maximum number of segments of lengths a, b and c	2475
835	Maximum subsequence sum such that no three are consecutive	2473
836	Print All Distinct Elements of a Given Integer Array	2473
837	Find Peak Element	2473
838	Employee Importance LeetCode Solution	2472
839	Products of ranges in an array	2472
840	Print all triplets in sorted array that form AP	2471
841	Longest Bitonic Subsequence	2466
842	Closest Leaf in a Binary Tree LeetCode Solution	2465
843	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2462
844	Diagonal Traversal of Binary Tree	2462
845	Find Smallest Range Containing Elements from k Lists	2460
846	Array Nesting Leetcode Solution	2459
847	Arrange given numbers to form the biggest number	2458
848	Range Sum Query using Sparse Table	2457
849	Largest subarray with equal number of 0s and 1s	2457
850	Lower Case To Upper Case	2457
851	Valid Parenthesis String	2456
852	Find Nth Node	2445
853	Stone Game IV LeetCode Solution	2443
854	Longest Palindromic Subsequence	2438
855	Largest BST Subtree LeetCode Solution	2436
856	Distinct Subsequences	2436
857	Trapping Rain Water II LeetCode Solution	2433
858	Median of Two Sorted Arrays	2433
859	Print Right View of a Binary Tree	2428
860	Segment Tree	2427
861	Bottom View of a Binary Tree	2424
862	Contiguous Array	2420
863	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2412
864	Shuffle an Array	2412
865	Largest divisible pairs subset	2411
866	Path Sum	2411
867	Number of siblings of a given Node in n-ary Tree	2410
868	Four Elements that Sum to Given	2410
869	Subset Sum Problem in O(sum) space	2398
870	Stone Game IV LeetCode Solution	2397
871	Find the largest multiple of 3	2397
872	Write a function to get the intersection point of two Linked Lists	2396
873	Merge Two Sorted Arrays	2388
874	Maximum Population Year LeetCode Solution	2386
875	Binary array after M range toggle operations	2384
876	Count and Say	2383
877	Isomorphic Strings	2379
878	Unique Binary Search Trees	2376
879	Red-Black Tree Introduction	2373
880	Permutations of a Given String Using STL	2372
881	Infix to Postfix	2371
882	Next Greater Element in an Array	2368
883	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2358
884	Height of a generic tree from parent array	2357
885	Friends Pairing Problem	2350
886	Find Largest d in Array such that a + b + c = d	2348
887	Closest Binary Search Tree Value Leetcode Solution	2344
888	Valid Number	2340
889	Valid Perfect Square LeetCode Solution	2335
890	The Number of Weak Characters in the Game LeetCode Solution	2331
891	Encoded String With Shortest Length LeetCode Solution	2328
892	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2328
893	Maximum Product Subarray	2326
894	Count Primes in Ranges	2325
895	Sentence Screen Fitting LeetCode Solution	2320
896	Averages of Levels in Binary Tree	2320
897	Find unique character in a string	2319
898	Insert Delete GetRandom	2318
899	Maximum Sum of 3 Non-Overlapping Subarrays	2318
900	Transform a BST to Greater sum Tree	2316
901	Shuffle a given Array	2304
902	Range Minimum Query (Square Root Decomposition and Sparse Table)	2303
903	Binary Search Tree Delete Operation	2301
904	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2298
905	Edit Distance	2287
906	Orderly Queue LeetCode Solution	2286
907	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2284
908	Reorganize String	2283
909	Print n terms of Newman-Conway Sequence	2280
910	Binary Tree Longest Consecutive Sequence LeetCode Solution	2279
911	Convert BST into a Min-Heap without using array	2273
912	Minimum sum of squares of character counts in a given string after removing k characters	2271
913	Serialize and Deserialize Binary Tree	2268
914	Integer to Roman	2262
915	Bold Words in String LeetCode Solution	2257
916	Find Minimum In Rotated Sorted Array	2257
917	Lowest Common Ancestor in Binary Search Tree	2253
918	Range Queries for Longest Correct Bracket Subsequence	2247
919	Kth Smallest Number in Multiplication Table Leetcode Solution	2246
920	Next greater element	2246
921	Maximum Product Subarray	2245
922	Swap Nodes In Pairs	2240
923	Diameter of N-Ary Tree LeetCode Solution	2236
924	Koko Eating Bananas LeetCode Solution	2234
925	Array Queries for multiply replacements and product	2233
926	Find the smallest binary digit multiple of given number	2221
927	K’th Largest element in BST using constant extra space	2214
928	K’th Largest Element in BST when modification to BST is not allowed	2214
929	Advantages of BST over Hash Table	2212
930	Constant time range add operation on an array	2208
931	Maximum Sum Increasing Subsequence	2206
932	Next Greater Element II LeetCode Solution	2200
933	Write Code to Determine if Two Trees are Identical	2191
934	Best Meeting Point LeetCode Solution	2186
935	Serialize and Deserialize Binary Tree LeetCode Solution	2182
936	Moving Stones Until Consecutive Leetcode Solution	2181
937	Check if an Array is Stack Sortable	2179
938	Valid Tic-Tac-Toe State LeetCode Solution	2178
939	Total Hamming Distance LeetCode Solution	2174
940	Longest Increasing Consecutive Subsequence	2169
941	Queries on XOR of greatest odd divisor of the range	2167
942	Power of Two	2164
943	Level Order Traversal of Binary Tree	2163
944	Insert into a Sorted Circular Linked List LeetCode Solution	2159
945	Numbers with prime frequencies greater than or equal to k	2157
946	Design Underground System Leetcode Solution	2154
947	Check if each internal node of a BST has exactly one child	2152
948	Clone a Binary Tree with Random Pointers	2151
949	Check if X can give change to every person in the Queue	2148
950	Reverse a Path in BST using Queue	2146
951	Greatest Sum Divisible by Three LeetCode Solution	2145
952	Image Overlap LeetCode Solution	2145
953	Number of elements less than or equal to a given number in a given subarray	2145
954	Number of Orders in the Backlog Leetcode Solution	2138
955	Find minimum number of merge operations to make an array palindrome	2138
956	Form minimum number from given sequence	2136
957	Find the node with minimum value in a Binary Search Tree	2136
958	A program to check if a binary tree is BST or not	2128
959	Count the Pairs at Same Distance as in English Alphabets	2127
960	Design Add and Search Words Data Structure LeetCode Solution	2123
961	Maximum Array from Two given Arrays Keeping Order Same	2122
962	Graph Cloning	2120
963	Count and Toggle Queries on a Binary Array	2113
964	Collect maximum points in a grid using two traversals	2112
965	Factorial Trailing Zeroes LeetCode Solution	2111
966	Print Next Greater Number of Q queries	2107
967	Merge two BSTs with limited extra space	2100
968	Largest Plus Sign Leetcode Solution	2096
969	Closest Binary Search Tree Value II LeetCode Solution	2095
970	Maximum difference between first and last indexes of an element in array	2093
971	Check for Palindrome after every character replacement Query	2085
972	Dividing Array into Pairs With Sum Divisible by K	2082
973	Merge Sort	2081
974	Queries for Decimal Values of Subarrays of a Binary Array	2080
975	Group Shifted Strings Leetcode Solution	2079
976	Merge Sorted Array	2078
977	Priority Queue	2063
978	Print modified array after multiple array range increment operations	2049
979	Longest Substring Without Repeating Characters Leetcode Solution	2048
980	Form Minimum Number From Given Sequence	2048
981	Print Ancestors of a Given Binary Tree Node Without Recursion	2042
982	Count even length binary sequences with same sum of first and second half bits	2040
983	Kth Smallest Element in a BST	2034
984	Excel Sheet Column Number LeetCode Solution	2032
985	Guess The Word	2029
986	Print all Possible Ways to Break a String in Bracket Form	2028
987	Cutting a Rod	2026
988	Swim in Rising Water LeetCode Solution	2022
989	Minimum Moves to Equal Array Elements LeetCode Solution	2014
990	Count Pairs Whose Products Exist in Array	2000
991	Binary Search Tree	1999
992	Find maximum average subarray of k length	1996
993	Excel Sheet Column Title LeetCode Solution	1994
994	How to print maximum number of A’s using given four keys	1993
995	Palindrome Partitioning	1992
996	Unique Paths II	1985
997	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1982
998	Find postorder traversal of BST from preorder traversal	1977
999	K Empty Slots	1966
1000	Sum of Left Leaves LeetCode Solution	1961
1001	Binary Search Tree Search and Insertion	1958
1002	Check given array of size n can represent BST of n levels or not	1955
1003	Longest Common Prefix using Character by Character Matching	1954
1004	Regular Expression Matching	1952
1005	Decrease Elements To Make Array Zigzag LeetCode Solution	1931
1006	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1926
1007	Sorted Array to Balanced BST	1926
1008	Queries for Number of Distinct Elements in a Subarray	1894
1009	Construct Complete Binary Tree from its Linked List Representation	1894
1010	Maximum Depth Of Binary Tree	1893
1011	Find the Town Judge LeetCode Solution	1874
1012	Iterative method to find ancestors of a given binary tree	1868
1013	Maximum weight transformation of a given string	1866
1014	Shortest Unsorted Continuous Subarray LeetCode Solution	1857
1015	Symmetric Tree LeetCode Solution Leetcode Solution	1850
1016	Binary Tree to Binary Search Tree Conversion using STL set	1845
1017	Find Maximum Depth of Nested Parenthesis in a String	1842
1018	Search in Sorted Rotated Array	1826
1019	Data Structure Designing	1825
1020	Random Pick Index LeetCode Solution	1816
1021	Search an Element in Sorted Rotated Array	1786
1022	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1769
1023	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1761
1024	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1757
1025	Next Greater Element I Leetcode Solution	1751
1026	Print Maximum Length Chain of Pairs	1715
1027	Flatten Binary Tree to Linked List LeetCode Solution	1702
1028	Maximum Binary Tree	1697
1029	Peeking Iterator LeetCode Solution	1672
1030	Find k-th smallest element in BST (Order Statistics in BST)	1670
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1627