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	41558
2	Maximum occurring character in a string	19178
3	Plus One Leetcode Solution	18436
4	Valid Parentheses LeetCode Solution	18251
5	3Sum Leetcode Solution	16180
6	First Repeating Element	14634
7	Single Number Leetcode Solution	14298
8	Merge Sorted Arrays Leetcode Solution	14016
9	Count Primes Leetcode Solutions	13836
10	Pow(x, n) Leetcode Solution	13516
11	Sqrt(x) Leetcode Solution	13317
12	Meeting Rooms II LeetCode Solution	12463
13	Concatenation of Array LeetCode Solution	12208
14	Roman to Integer Leetcode Solution	11429
15	Search Insert Position Leetcode Solution	11226
16	Contains Duplicate II Leetcode Solution	11216
17	Valid Palindrome Leetcode Solution	11146
18	Palindrome Number LeetCode Solution	11086
19	Reverse Vowels of a String Leetcode Solution	10662
20	Jump Game Leetcode Solution	10544
21	Intersection of Two Arrays II Leetcode Solution	10521
22	Number of Good Pairs Leetcode Solution	10445
23	Spiral Matrix LeetCode Solution	10300
24	Kids With the Greatest Number of Candies Leetcode Solution	10256
25	Longest Substring Without Repeating Characters LeetCode Solution	10236
26	House Robber Leetcode Solution	10206
27	Remove Duplicates from Sorted Array Leetcode Solution	10157
28	Add Binary Leetcode Solution	10060
29	Maximum Subarray Leetcode Solution	9711
30	Find the Maximum Repeating Number in Array	9642
31	Text Justification LeetCode Solution	9463
32	Number Of 1 bits	9371
33	Jewels and Stones Leetcode Solution	9257
34	Longest Palindromic Substring LeetCode Solution	9160
35	Power of Two Leetcode Solution	9109
36	Min Stack Leetcode Solution	9063
37	Move Zeroes LeetCode Solution	9057
38	Permutations Leetcode Solution	8982
39	Shuffle String Leetcode Solution	8855
40	Find All Numbers Disappeared in an Array Leetcode Solution	8776
41	Third Maximum Number Leetcode Solution	8705
42	Word Search Leetcode Solution	8694
43	Next Permutation Leetcode Solution	8692
44	Daily Temperatures Leetcode Solution	8686
45	Number of Islands LeetCode Solution	8602
46	Median of Two Sorted Arrays LeetCode Solution	8598
47	Maximum Profit in Job Scheduling Leetcode Solution	8530
48	Kth Missing Positive Number Leetcode Solution	8511
49	Longest Common Prefix Leetcode Solution	8498
50	Search in Rotated Sorted Array Leetcode Solution	8492
51	Next Greater Element I Leetcode Solution	8421
52	Frog Jump Leetcode Solution	8358
53	Find Minimum Distance Between Two Numbers in an Array	8215
54	Evaluation of Postfix Expression	8167
55	Running Sum of 1d Array Leetcode Solution	8148
56	Rotate Image LeetCode Solution	8072
57	Multiply Strings Leetcode Solution	8068
58	Can Place Flowers LeetCode Solution	7994
59	Shuffle the Array Leetcode Solution	7988
60	Valid Anagram Leetcode Solution	7986
61	Combination Sum Leetcode Solution	7972
62	Bulb Switcher LeetCode Solution	7968
63	3Sum Closest LeetCode Solution	7949
64	House Robber II Leetcode Solution	7925
65	Count and Say Leetcode Solution	7877
66	Subarray and Subsequence	7651
67	Koko Eating Bananas Leetcode Solution	7628
68	Excel Sheet Column Title Leetcode Solution	7614
69	Isomorphic Strings Leetcode Solution	7578
70	Missing Number Leetcode Solution	7553
71	Happy Number Leetcode Solution	7536
72	Count Pairs With Given Sum	7522
73	Product of array except self	7519
74	Integer to Roman Leetcode Solution	7515
75	Strobogrammatic Number LeetCode Solution	7470
76	Majority Element Leetcode Solution	7455
77	Reverse String Without Temporary Variable	7445
78	Rotate String LeetCode Solution	7353
79	Best Time to Buy and Sell Stock LeetCode Solution	7347
80	Candy LeetCode Solution	7304
81	Find the Difference Leetcode Solution	7249
82	Is Subsequence Leetcode Solution	7229
83	Largest Number Leetcode Solution	7168
84	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7125
85	Find Common Characters Leetcode Solution	7110
86	String to Integer (atoi) LeetCode Solution	7081
87	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7066
88	Set Matrix Zeroes	6999
89	Find the Duplicate Number LeetCode Solution	6982
90	Binary Search LeetCode Solution	6951
91	Summary Ranges Leetcode Solution	6918
92	A Product Array Puzzle	6918
93	Subset Leetcode	6885
94	Expression Evaluation	6877
95	Sort Characters By Frequency LeetCode Solution	6836
96	Word Pattern LeetCode Solution	6800
97	Balanced Binary Tree Leetcode Solution	6799
98	Find the Town Judge Leetcode Solution	6789
99	Rabin Karp Algorithm	6764
100	Unique Paths Leetcode Solution	6755
101	Arranging Coins Leetcode Solution	6727
102	Find the Winner of the Circular Game LeetCode Solution	6658
103	Rearrange Positive and Negative Numbers Alternatively in Array	6642
104	String Compression LeetCode Solution	6620
105	Repeated Substring Pattern LeetCode Solution	6600
106	Smallest window in a string containing all characters of another string	6581
107	Asteroid Collision LeetCode Solution	6573
108	Sort Colors LeetCode Solution	6506
109	Group Anagrams LeetCode Solution	6464
110	Best Time to Buy and Sell Stock II Leetcode Solution	6358
111	Sort Array By Parity LeetCode Solution	6336
112	Zigzag Conversion LeetCode Solution	6326
113	Page Replacement Algorithms in Operating Systems	6308
114	Sum of minimum and maximum elements of all subarrays of size k	6277
115	Postfix to Infix Conversion	6259
116	Valid Palindrome II Leetcode Solution	6241
117	Divide Two Integers Leetcode Solution	6235
118	Reverse Integer Leetcode Solution	6172
119	Product of Array Except Self LeetCode Solution	6161
120	Generate Parentheses Leetcode Solution	6155
121	Kth largest element in an Array Leetcode Solutions	6144
122	Assign Cookies Leetcode Solution	6112
123	Matrix Chain Multiplication using Dynamic Programming	6079
124	Merge Two Sorted Lists Leetcode Solutions	6049
125	Bus Routes Leetcode Solution	6044
126	Pascal Triangle Leetcode	6044
127	Number of Provinces Leetcode Solution	6028
128	Remove Duplicates from Sorted Array II Leetcode Solution	6026
129	Linked List Cycle II LeetCode Solution	6008
130	Length of Last Word Leetcode Solution	5991
131	H-Index Leetcode Solution	5976
132	Decode String Leetcode Solution	5960
133	Minimum Steps to reach target by a Knight	5928
134	Convert array into Zig-Zag fashion	5918
135	Defanging an IP Address Leetcode Solution	5904
136	Optimal Account Balancing LeetCode Solution	5903
137	Employee Free Time LeetCode Solution	5900
138	First element occurring k times in an array	5834
139	Minimum Cost For Tickets Leetcode Solution	5832
140	Build Array From Permutation Leetcode Solution	5788
141	Pascal’s Triangle II Leetcode Solution	5734
142	Prefix to Infix Conversion	5703
143	Increasing Triplet Subsequence LeetCode Solution	5699
144	Implementation of Deque using Doubly Linked List	5658
145	Find First and Last Position of Element in Sorted Array Leetcode Solution	5651
146	Find the Row with Maximum Number of 1’s	5627
147	Robot Room Cleaner Leetcode Solution	5620
148	Island Perimeter Leetcode Solution	5616
149	Max Consecutive Ones Leetcode Solution	5556
150	Find Pair with Given Difference	5548
151	Bellman Ford Algorithm	5546
152	Swap Nodes in Pairs Leetcode Solutions	5544
153	K-th Smallest Element in a Sorted Matrix	5541
154	Majority Element II Leetcode Solution	5531
155	Fibonacci Number LeetCode Solution	5529
156	Check if the Elements of an Array are Consecutive	5502
157	Design Parking System Leetcode Solution	5461
158	Guess Number Higher or Lower LeetCode Solution	5460
159	KMP Algorithm	5457
160	Find the Missing Number	5456
161	Merge Sorted Array LeetCode Solution	5435
162	Lemonade Change Leetcode Solution	5411
163	First negative integer in every window of size k	5408
164	Length of the largest subarray with contiguous elements	5404
165	Add Two Numbers II Leetcode Solution	5397
166	Delete middle element of a stack	5395
167	Coin Change 2 Leetcode Solution	5385
168	First Unique Character in a String LeetCode Solution	5381
169	Subarray Product Less Than K LeetCode Solution	5373
170	OSI Model	5363
171	Last Stone Weight	5341
172	String Compression	5333
173	Subarray Sum Equals K LeetCode Solution	5324
174	Capacity To Ship Packages Within D Days Leetcode Solution	5323
175	Subarray with Given Sum	5305
176	Word Ladder LeetCode Solution	5301
177	Find Smallest Missing Number in a Sorted Array	5278
178	Find All Duplicates in an Array LeetCode Solution	5274
179	Palindrome Linked List Leetcode Solution	5270
180	Form Minimum Number from Given Sequence of D’s and I’s	5269
181	Set Matrix Zeroes Leetcode Solution	5263
182	Monotonic Array LeetCode Solution	5246
183	Trapping Rain Water Leetcode Solution	5244
184	Repeated Substring Pattern	5221
185	Combinations Leetcode Solution	5201
186	Reverse Words in a String III LeetCode Solution	5181
187	Remove Duplicates from Sorted List II LeetCode Solution	5175
188	Same Tree LeetCode Solution	5166
189	Iterative Implementation of Quick Sort	5150
190	Valid Perfect Square Leetcode Solution	5133
191	Continuous Subarray Sum LeetCode Solution	5121
192	01 Matrix LeetCode Solution	5114
193	Single Element in a Sorted Array LeetCode Solution	5082
194	Remove Linked List Elements Leetcode Solution	5073
195	Backspace String Compare	5065
196	Break a Palindrome LeetCode Solution	5061
197	Merge k Sorted Lists Leetcode Solution	5028
198	Slowest Key Leetcode Solution	5023
199	Prefix to Postfix Conversion	5009
200	Combination Sum	4997
201	Relative Ranks Leetcode Solution	4986
202	The K Weakest Rows in a Matrix Leetcode Solution	4958
203	Leetcode Permutations	4955
204	Find the Duplicate Element	4929
205	Rotate List Leetcode Solution	4903
206	Second Most Repeated Word in a Sequence	4886
207	Printing brackets in Matrix Chain Multiplication Problem	4879
208	Maximum Product of Three Numbers LeetCode Solution	4869
209	Find Peak Element LeetCode Solution	4864
210	Insert Delete GetRandom O(1) Leetcode Solution	4859
211	Kth Largest Element in a Stream Leetcode Solution	4837
212	Longest Common Subsequence LeetCode Solution	4832
213	Top K Frequent Elements LeetCode Solution	4814
214	Palindrome Number	4811
215	Remove All Occurrences of a Substring LeetCode Solution	4800
216	Convert a Number to Hexadecimal Leetcode Solution	4791
217	Rearrange given Array in Maximum Minimum Form	4790
218	Make The String Great Leetcode Solution	4782
219	Cuckoo sequence program	4770
220	Relative Sort Array Leetcode Solution	4759
221	Subarray Sum Equals k	4756
222	Delete Node in a Linked List Leetcode Solution	4745
223	Unique Paths II Leetcode Solution	4739
224	Max Area of Island	4738
225	Find Leaders in an Array	4729
226	Target Sum	4715
227	Generate all Binary Strings Without Consecutive 1’s	4704
228	Time Based Key-Value Store LeetCode Solution	4700
229	Permutation in String Leetcode Solution	4700
230	Check If Two String Arrays are Equivalent Leetcode Solution	4692
231	Container With Most Water LeetCode Solution	4690
232	Moving Average from Data Stream Leetcode Solution	4678
233	N-Queens LeetCode Solution	4664
234	Find N Unique Integers Sum up to Zero Leetcode Solution	4660
235	Given two unsorted arrays find all pairs whose sum is x	4644
236	Count Good Nodes in Binary Tree Leetcode Solution	4635
237	Scramble String	4626
238	Arithmetic Expression Evaluation	4610
239	Contains Duplicate LeetCode Solution	4601
240	Number of Dice Rolls With Target Sum LeetCode Solution	4595
241	LRU Cache LeetCode Solution	4577
242	Letter Combinations of a Phone Number	4571
243	Find Triplet in Array With a Given Sum	4562
244	Construct Binary Tree from Given Inorder and Preorder Traversals	4542
245	Minimum swaps required to bring all elements less than or equal to k together	4539
246	Flipping an Image LeetCode Solution	4535
247	Stone Game LeetCode	4533
248	Remove Minimum Characters so that Two Strings Become Anagrams	4520
249	Reverse Only Letters LeetCode Solution	4519
250	Next Permutation	4519
251	Check If N and Its Double Exist Leetcode Solution	4516
252	Number of Steps to Reduce a Number to Zero Leetcode Solution	4503
253	Min Cost Climbing Stairs LeetCode Solution	4501
254	Stock Buy Sell to Maximize Profit	4494
255	Minimum Knight Moves LeetCode Solution	4481
256	Prim’s Algorithm	4473
257	Find The Duplicate Number	4462
258	To Lower Case Leetcode Solution	4447
259	Student Attendance Record I Leetcode Solution	4443
260	Top K Frequent Elements	4413
261	The kth Factor of n Leetcode Solution	4396
262	Minimum Operations to convert X to Y	4396
263	Smallest Positive Number Missing in an Unsorted Array	4372
264	Reverse words in a string	4366
265	Maximum Subarray Sum using Divide and Conquer	4366
266	License Key Formatting Leetcode Solution	4361
267	Maximum Sum Increasing Subsequence	4338
268	Min Stack	4323
269	Search Suggestions System LeetCode Solution	4318
270	Maximum Population Year LeetCode Solution	4316
271	Find the Number Occurring Odd Number of Times in an Array	4309
272	Sum of Subarray Ranges Leetcode Solution	4297
273	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4278
274	Single Number	4263
275	Find Words That Can Be Formed by Characters Leetcode Solution	4255
276	Reformat Date LeetCode Solution	4242
277	Top K Frequent Words LeetCode Solution	4234
278	Longest Common Subsequence	4191
279	Minimum Path Sum Leetcode Solution	4188
280	Remove Nth Node From End of List Leetcode Solution	4180
281	Reverse individual words	4177
282	N-th Tribonacci Number Leetcode Solution	4172
283	Intersection of Two Arrays	4160
284	Maximize Distance to Closest Person LeetCode Solution	4143
285	Last Stone Weight II LeetCode Solution	4142
286	Maximum Depth of Binary Tree Leetcode Solution	4137
287	Reveal Cards In Increasing Order Leetcode Solution	4135
288	Evaluate Division	4132
289	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4126
290	Remove Duplicates from Sorted List LeetCode Solution	4126
291	BFS for Disconnected Graph	4118
292	Best Time to Buy and Sell Stock III Leetcode Solution	4106
293	Minimum Characters to be Added at Front to Make String Palindrome	4105
294	Diagonal Traverse LeetCode Solution	4098
295	House Robber	4096
296	Count of index pairs with equal elements in an array	4079
297	Find any one of the multiple repeating elements in read only array	4073
298	Most Frequent Element in an Array	4066
299	Find if Path Exists in Graph Leetcode Solution	4065
300	Count Number of Occurrences in a Sorted Array	4053
301	Design A Leaderboard Leetcode Solution	4050
302	Sort Elements by Frequency of Occurrences	4038
303	Binary Tree Inorder Traversal LeetCode Solution	4034
304	Length of Longest valid Substring	4034
305	Minimum number of Merge Operations to make an Array Palindrome	4026
306	Implement a stack using single queue	4011
307	Find the Closest Palindrome number	3989
308	Range Sum Query 2D – Immutable Leetcode Solution	3966
309	Find Leaves of Binary Tree LeetCode Solution	3962
310	Brightest Position on Street LeetCode Solution	3954
311	Maximum Size Subarray Sum Equals k Leetcode Solution	3935
312	Partition Array Into Three Parts With Equal Sum Leetcode Solution	3932
313	Invalid Transactions LeetCode Solution	3929
314	Spiral Matrix II Leetcode Solution	3922
315	Shortest Word Distance Leetcode Solution	3917
316	Sort Array By Parity II Leetcode Solution	3906
317	Mobile Numeric Keypad Problem	3906
318	Reverse Bits	3896
319	Special Positions in a Binary Matrix Leetcode Solution	3895
320	Remove All Ones With Row and Column Flips Leetcode Solution	3888
321	Symmetric Tree Leetcode Solution	3888
322	Sudoku Solver	3886
323	Arrange given Numbers to Form the Biggest Number II	3886
324	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3884
325	Reverse Nodes in k-Group LeetCode Solution	3877
326	Diagonal Traversal LeetCode Solution	3856
327	Paint House LeetCode Solution	3844
328	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3838
329	One Edit Distance LeetCode Solution	3835
330	Jump Game	3828
331	Remove Invalid Parentheses Leetcode Solution	3824
332	Find Duplicates in an Array in Most Efficient Way	3814
333	Construct BST from its given Level Order Traversal	3803
334	Rank Transform of an Array Leetcode Solution	3800
335	Alien Dictionary LeetCode Solution	3794
336	Unique Paths	3786
337	Maximum Subarray	3769
338	Partition Labels LeetCode Solution	3765
339	Minimum Moves to Equal Array Elements Leetcode Solution	3763
340	Hamming Distance Leetcode Solution	3744
341	Minimum operation to make all elements equal in array	3744
342	Largest Rectangle in Histogram LeetCode Solution	3740
343	Least Number of Unique Integers after K Removals Leetcode Solution	3739
344	Split Linked List in Parts Leetcode Solution	3735
345	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3735
346	Bitwise AND of Numbers Range LeetCode Solution	3735
347	Minimum Depth of Binary Tree Leetcode Solution	3730
348	Round Robin Scheduling	3730
349	Maximal Square	3730
350	The Celebrity Problem	3727
351	Tug of War	3726
352	Range Sum of BST LeetCode Solution	3724
353	Pair of Positive Negative Values in an Array	3721
354	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3714
355	String Matching in an Array Leetcode Solution	3709
356	Check whether Strings are K Distance Apart or Not	3708
357	Smallest Subarray with k Distinct Numbers	3707
358	Next Permutation LeetCode Solution	3701
359	Find Winner on a Tic Tac Toe Game Leetcode Solution	3698
360	Maximum Circular Subarray Sum	3698
361	Dijkstra Algorithm	3695
362	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3673
363	Minimum Time Visiting All Points Leetcode Solution	3668
364	Count of Triplets With Sum Less than Given Value	3666
365	Longest Common Prefix using Trie	3664
366	Clone Graph LeetCode Solution	3663
367	Minimum Cost to Hire K Workers	3658
368	Given an Array of Pairs Find all Symmetric Pairs in it	3657
369	Merge Two Sorted Linked Lists	3654
370	Next Greater Element III LeetCode Solution	3652
371	Regular Expression Matching Regular Expression Matching LeetCode Solution	3643
372	Find minimum difference between any two elements	3638
373	K Empty Slots LeetCode	3638
374	Minimize Maximum Pair Sum in Array LeetCode Solution	3632
375	Check if a given array contains duplicate elements within k distance from each other	3626
376	Sort a stack using a temporary stack	3625
377	Ugly Number II LeetCode Solution	3623
378	Transpose Graph	3608
379	Implementation of Deque using circular array	3608
380	Robot Bounded In Circle LeetCode Solution	3599
381	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3596
382	Non-decreasing Array LeetCode Solution	3588
383	Invert Binary Tree LeetCode Solution	3578
384	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3574
385	Unique Paths III LeetCode Solution	3570
386	Permutation Sequence LeetCode Solution	3569
387	Longest subarray not having more than K distinct elements	3562
388	Substring with Concatenation of All Words Leetcode Solution	3555
389	Missing Element in Sorted Array LeetCode Solution	3554
390	Find duplicates in a given array when elements are not limited to a range	3553
391	Longest Substring with At Most K Distinct Characters LeetCode Solution	3544
392	Find the Smallest Divisor given a Threshold Leetcode Solution	3542
393	Sliding Window Technique	3541
394	Find the First and Second Smallest Elements	3541
395	Validate Stack Sequences LeetCode Solution	3539
396	Postfix to Prefix Conversion	3534
397	Invert Binary Tree LeetCode Solution	3533
398	Stack Permutations (Check if an array is stack permutation of other)	3533
399	Find Top K (or Most Frequent) Numbers in a Stream	3532
400	First Circular Tour to Visit all the Petrol Bunks	3532
401	Number of Islands II LeetCode Solution	3526
402	Design Browser History LeetCode Solution	3525
403	Longest subsequence such that difference between adjacents is one	3524
404	LRU Cache Implementation	3524
405	Path With Maximum Minimum Value LeetCode Solution	3523
406	Find the subarray with least average	3523
407	Common elements in all rows of a given matrix	3521
408	Kth Smallest Element in a BST Leetcode Solution	3519
409	Graph Valid Tree LeetCode Solution	3518
410	Queries for counts of array elements with values in given range	3515
411	Find Maximum Level sum in Binary Tree	3512
412	Word Search	3509
413	Stone Game II Leetcode	3504
414	Kruskal Algorithm	3503
415	Combination Sum IV LeetCode Solution	3499
416	K Closest Points to Origin Leetcode Solution	3496
417	Toeplitz Matrix	3495
418	Partition List Leetcode Solution	3494
419	Sequences of given length where every element is more than or equal to twice of previous	3489
420	Snakes and Ladders LeetCode Solution	3488
421	Integer Break LeetCode Solution	3487
422	Number Complement Leetcode Solution	3478
423	Maximum Number of Occurrences of a Substring Leetcode Solution	3474
424	Number of Smaller Elements on Right Side	3474
425	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3471
426	Search a 2D Matrix II Leetcode Solution	3467
427	Painting Fence Algorithm	3467
428	Longest Palindrome can be Formed by Removing or Rearranging Characters	3455
429	Find the Peak Element from an Array	3447
430	Max stack	3444
431	Sort elements by frequency	3443
432	Odd Even Linked List Leetcode Solution	3438
433	Recursion	3430
434	Minesweeper LeetCode Solution	3418
435	Priority Queue using doubly linked list	3416
436	Consecutive Characters LeetCode Solution	3404
437	Can Make Arithmetic Progression From Sequence Leetcode Solution	3403
438	Insert Interval Leetcode Solution	3399
439	LRU Cache Leetcode Solution	3398
440	Check if Two given Strings are Isomorphic to each other	3398
441	Search in a Binary Search Tree Leetcode Solution	3396
442	Top View of Binary Tree	3394
443	Nth Catalan Number	3391
444	3 Sum	3389
445	Find Minimum in Rotated Sorted Array II LeetCode Solution	3383
446	Maximum Consecutive Numbers Present in an Array	3382
447	Rearrange array such that even positioned are greater than odd	3381
448	Flood Fill LeetCode	3370
449	Expression Contains Redundant Bracket or Not	3353
450	Design a stack that supports getMin() in O(1) time and O(1) extra space	3351
451	Number of Closed Islands Leetcode Solution	3348
452	Minimum Absolute Difference in BST Leetcode Solution	3343
453	Kth Non-repeating Character	3339
454	Distance of nearest cell having 1 in a binary matrix	3336
455	Decompress Run-Length Encoded List Leetcode Solution	3335
456	Find a Peak Element II LeetCode Solution	3334
457	Replace Elements with Greatest Element on Right Side Leetcode Solution	3328
458	Move All the Zeros to the End of the Given Array	3325
459	Shortest Palindrome	3320
460	Check If Array Pairs Are Divisible by k LeetCode Solution	3317
461	Spiral Matrix III LeetCode Solution	3311
462	Insert into a Binary Search Tree Leetcode Solution	3308
463	High Five LeetCode Solution	3304
464	Integer to English words	3304
465	Gold Mine Problem	3299
466	Restore IP Addresses Leetcode Solution	3296
467	Sliding Window Maximum LeetCode Solution	3295
468	4Sum	3285
469	Balanced Expression with Replacement	3283
470	Sorting array using Stacks	3276
471	Queries for GCD of all numbers of an array except elements in a given range	3275
472	Best Time to Buy and Sell Stock	3274
473	Binary Tree Maximum Path Sum LeetCode Solution	3273
474	Convert Sorted Array to Binary Search Tree Leetcode Solution	3273
475	Minimum Path Sum	3272
476	N queen problem	3262
477	Find All Possible Recipes from Given Supplies LeetCode Solution	3260
478	Cells with Odd Values in a Matrix LeetCode Solution	3255
479	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3255
480	Trapping Rain Water LeetCode Solution	3253
481	Tiling Problem	3249
482	Priority Queue in C++	3248
483	Majority Element	3248
484	Find Pythagorean Triplets from Array	3244
485	Palindrome Substring Queries	3238
486	Sort Colors	3238
487	The Stock Span Problem	3235
488	Longest Common Prefix using Sorting	3228
489	Vertical Order Traversal of Binary Tree LeetCode Solution	3218
490	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3214
491	Number of Days Between Two Dates LeetCode Solution	3213
492	Sliding Window Median Leetcode Solution	3212
493	Is Graph Bipartite? LeetCode Solution	3210
494	Evaluate Reverse Polish Notation LeetCode Solution	3210
495	Sort an array according to the order defined by another array	3204
496	Coin Change Problem	3203
497	Count items common to both the lists but with different prices	3198
498	Path Sum II LeetCode Solution	3194
499	Fibonacci Number LeetCode Solution	3193
500	Reverse a linked list	3183
501	Find the first Repeating Number in a Given Array	3178
502	Pancake Sorting Problem	3177
503	Different Ways to Add Parentheses Leetcode Solution	3174
504	Camelcase Matching Leetcode Solution	3162
505	Largest rectangular sub-matrix whose sum is 0	3162
506	How to Implement Stack Using Priority Queue or Heap?	3161
507	Kth ancestor of a node in binary tree	3156
508	Custom Sort String Leetcode Solution	3152
509	Shortest Completing Word Leetcode Solution	3150
510	Interval Tree	3148
511	Intersection of Two Linked Lists LeetCode Solution	3144
512	Design Hit Counter LeetCode Solution	3144
513	Check if Array Contains Contiguous Integers With Duplicates Allowed	3143
514	Longest Increasing Path in a Matrix LeetCode Solution	3136
515	Queue using Stacks	3135
516	Multiplication of Two Matrices	3135
517	Find a Fixed Point in a Given Array	3134
518	Analyze User Website Visit Pattern LeetCode Solution	3130
519	Count subarrays having total distinct elements same as original array	3127
520	Scramble String LeetCode Solution	3125
521	Divide Chocolate LeetCode Solution	3121
522	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3121
523	Sieve of Eratosthenes	3120
524	Detect a loop in the Linked List	3114
525	Find Median from Data Stream LeetCode Solution	3111
526	Implement Trie (Prefix Tree) Leetcode Solution	3090
527	Group Anagrams	3089
528	Perfect Squares LeetCode Solution	3083
529	Subset sum problem	3083
530	Generate all Binary Strings from Given Pattern	3079
531	Count Submatrices With All Ones LeetCode Solution	3077
532	Fibonacci numbers	3075
533	Reorder Data in Log Files LeetCode Solution	3072
534	Queue based approach for first non-repeating character in a stream	3067
535	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3066
536	Insert Node in the Sorted Linked List	3066
537	Number of Distinct Islands Leetcode Solution	3065
538	Path Crossing Leetcode Solution	3065
539	Longest Common Prefix using Divide and Conquer	3064
540	Maximum Sum of Non Consecutive Elements	3062
541	Find the Lost Element From a Duplicated Array	3054
542	Valid Boomerang Leetcode Solution	3050
543	Minimum Height Trees	3040
544	How to Create Mergable Stack?	3034
545	Champagne Tower LeetCode Solution	3033
546	Monotonic Array Leetcode Solution	3024
547	Palindrome Permutation LeetCode Solution	3023
548	Merge Overlapping Intervals	3023
549	Construction of Longest Increasing Subsequence (N log N)	3021
550	Shifting Letters LeetCode Solution	3017
551	Count Possible Triangles	3016
552	Race Car LeetCode Solution	3014
553	Decode Ways	3014
554	Decode String	3010
555	Build an Array With Stack Operations Leetcode Solution	3008
556	Sort a stack using recursion	3007
557	Find if an Expression has Duplicate Parenthesis or Not	3007
558	Find a Sorted Subsequence of size 3	3006
559	Merge Two Binary Trees LeetCode Solution	3001
560	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3001
561	Find maximum length Snake sequence	3000
562	LCS (Longest Common Subsequence) of three strings	2996
563	Nearest Exit from Entrance in Maze LeetCode Solution	2990
564	Smallest Good Base	2988
565	Minimum Bracket Reversals	2987
566	Print all Palindromic Partitions of a String	2985
567	Most Stones Removed with Same Row or Column LeetCode Solution	2982
568	Sliding Window Maximum	2980
569	First missing positive	2979
570	Recover Binary Search Tree	2979
571	Number of Equivalent Domino Pairs Leetcode Solution	2975
572	Largest Subarray with Equal Number of 0’s and 1’s	2970
573	Minimum Height Trees LeetCode Solution	2967
574	Recover Binary Search Tree Leetcode Solution	2964
575	Palindrome Partitioning Leetcode Solution	2960
576	Rectangle Overlap LeetCode Solution	2958
577	Distance Between Bus Stops Leetcode Solution	2958
578	Morris Traversal	2956
579	Letter Case Permutation	2955
580	Maximum Element in an Array which is Increasing and then Decreasing	2951
581	Maximum Number of Ways to Partition an Array LeetCode Solution	2946
582	Longest Substring with At Least K Repeating Characters LeetCode Solution	2944
583	Minimum number of jumps to reach end	2937
584	Reorder an Array According to the Given Indexes	2937
585	Guess Number Higher or Lower II	2931
586	Design a Stack With Increment Operation Leetcode Solution	2930
587	K-th Distinct Element in an Array	2926
588	Maximum Length of Chain Pairs	2925
589	Find the Town Judge LeetCode Solution	2924
590	Binary Tree zigzag level order Traversal	2924
591	Implement Two Stacks in an Array	2923
592	Implement strStr() LeetCode Solution	2918
593	Longest Repeated Subsequence	2914
594	Jump Game IV LeetCode Solution	2909
595	Maximum Depth of N-ary Tree Leetcode Solution	2905
596	Subarrays with K Different Integers Leetcode Solution	2901
597	Contiguous Array LeetCode Solution	2894
598	Mean of Array After Removing Some Elements Leetcode Solution	2894
599	Rearrange Spaces Between Words Leetcode Solution	2888
600	Find the two Numbers with Odd Occurrences in an Unsorted Array	2888
601	The Maze III LeetCode Solution	2886
602	Valid Parentheses Leetcode Solution	2881
603	All Possible Full Binary Trees LeetCode Solution	2880
604	Best Time to Buy and Sell Stock IV LeetCode Solution	2873
605	Sort a String According to Another String	2871
606	Contains Duplicate	2864
607	Check for Balanced Parentheses in an Expression	2861
608	Maximize Elements Using Another Array	2860
609	Design Skiplist LeetCode Solution	2857
610	Minimum Jumps to Reach Home LeetCode Solution	2857
611	Maximum sum rectangle in a 2D matrix	2841
612	Convert BST to Min Heap	2832
613	Palindrome Permutations of a String	2830
614	Iterative Method to find Height of Binary Tree	2820
615	Perform String Shifts Leetcode	2819
616	Maximum Score After Splitting a String Leetcode Solution	2818
617	Find the Minimum Element in a Sorted and Rotated Array	2816
618	Valid Sudoku	2813
619	Word Break	2812
620	Edit Distance LeetCode Solution	2809
621	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2801
622	Find the First Circular Tour that visits all the Petrol Pumps	2801
623	A Space Optimized DP solution for 0-1 Knapsack Problem	2797
624	Reach a Number LeetCode Solution	2796
625	Possible Bipartition LeetCode Solution	2794
626	Maximum Product of Splitted Binary Tree LeetCode Solution	2789
627	Best Meeting Point LeetCode Solution	2785
628	Count pair with Given Sum	2771
629	Find Largest Value in Each Tree Row LeetCode Solution	2765
630	Merge Two Balanced Binary Search Trees	2762
631	Number of palindromic paths in a matrix	2761
632	Check if the given array can represent Level Order Traversal of Binary Search Tree	2754
633	Sorted Linked List to Balanced BST	2754
634	Find the Subarray of given length with Least Average	2749
635	Count Sub Islands LeetCode Solution	2747
636	Swapping Nodes in a Linked List Leetcode Solution	2746
637	Merge Overlapping Intervals II	2745
638	My Calendar I LeetCode Solution	2744
639	Brick Wall LeetCode Solution	2742
640	Caesar Cipher	2733
641	Palindromic Substrings Leetcode Solution	2725
642	Level order Traversal in Spiral Form	2724
643	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2720
644	Merge K Sorted Arrays and Print Sorted Output	2713
645	Segregate 0s and 1s in an Array	2709
646	Find Median from data Stream	2704
647	Pair with given product	2702
648	Word Pattern	2697
649	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2691
650	Construct BST from given Preorder Traversal	2686
651	Palindrome Permutation	2682
652	Print Fibonacci sequence using 2 variables	2679
653	Maximize Sum of Array after K Negations Leetcode Solution	2678
654	Heap Sort	2676
655	Find all triplets with zero sum	2675
656	All Unique Triplets that Sum up to a Given Value	2672
657	Find whether a subarray is in form of a mountain or not	2670
658	Maximum Frequency Stack Leetcode Solution	2665
659	Find all pairs (a, b) in an array such that a % b = k	2665
660	Validate Binary Search Tree	2660
661	Add two numbers	2650
662	Find First and Last Position of Element in Sorted Array LeetCode Solution	2645
663	Convert Sorted List to Binary Search Tree	2644
664	Longest Subarray Having Count of 1s One More than Count of 0s	2643
665	Bubble sort using two Stacks	2642
666	Count Distinct Elements in Every Window of Size K	2640
667	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2640
668	Length of Longest Fibonacci Subsequence	2636
669	Minimum time required to rot all oranges	2631
670	How to Efficiently Implement k Stacks in a Single Array?	2628
671	Sort 0s 1s and 2s in an Array	2627
672	Isomorphic Strings LeetCode Solution	2626
673	Counting Bits	2624
674	Split Array Into Consecutive Subsequences	2623
675	Queries on Probability of Even or Odd Number in given Ranges	2622
676	Largest Sum Contiguous Subarray	2621
677	Find four elements that sum to a given value (Hashmap)	2617
678	Huffman Coding	2617
679	Detect Capital Leetcode Solution	2615
680	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2607
681	Binary Tree Right Side View LeetCode Solution	2606
682	Partition Problem	2604
683	Minimum Swaps to Group All 1’s Together Leetcode Solution	2597
684	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2595
685	Populating Next Right Pointers in Each Node Leetcode Solution	2592
686	Print all subarrays with 0 sum	2590
687	Remove Palindromic Subsequences Leetcode Solution	2588
688	Range Sum Query 2D – Immutable LeetCode Solution	2587
689	Remove brackets from an algebraic string containing + and – operators	2587
690	Count ways to reach the nth stair using step 1, 2 or 3	2581
691	Populating Next Right Pointers in Each Node	2576
692	String comparison containing wildcards	2575
693	Rotate Array	2574
694	Arithmetic Slices II – Subsequence LeetCode Solution	2570
695	Count Good Nodes in Binary Tree LeetCode Solution	2569
696	Partition to K Equal Sum Subsets Leetcode Solution	2562
697	Binary Tree to Binary Search Tree Conversion	2551
698	Find pairs with given sum such that elements of pair are in different rows	2549
699	Merge Two Sorted Lists Leetcode	2543
700	Maximum Number of Chocolates to be Distributed Equally Among k Students	2540
701	Concatenation of Array LeetCode Solution	2535
702	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2535
703	Check if a Linked list of Strings form a Palindrome	2535
704	Minimum Sum Path in a Triangle	2529
705	Web Crawler LeetCode Solution	2526
706	Happy Number	2517
707	Swap Kth Node from beginning with Kth Node from End	2512
708	Find Duplicate Subtrees	2502
709	Check if String Follows Order of Characters by a Pattern or not	2501
710	Difference Array \| Range update query in O(1)	2497
711	Inorder Successor of a node in Binary Tree	2496
712	Queue Reconstruction by Height	2496
713	Contiguous Array Leetcode	2495
714	Increasing Subsequence of Length three with Maximum Product	2495
715	Topological Sorting	2493
716	Find All Pairs With a Given Difference	2488
717	Breadth First Search (BFS) for a Graph	2485
718	Alien Dictionary	2480
719	Remove duplicates from sorted array	2467
720	Maximum Distance in Array	2466
721	Longest Common Prefix Using Binary Search II	2464
722	Root to Leaf path with target sum Leetcode Solutions	2462
723	Partition Equal Subset Sum	2458
724	Maximum Product Subarray II	2458
725	Container with Most Water	2456
726	Elements Appear more than N/K times in Array	2452
727	Count Minimum Steps to Get the given Array	2441
728	Sum Root to Leaf Numbers LeetCode Solution	2438
729	Minimum Swaps to Make Strings Equal Leetcode Solution	2437
730	Substring With Concatenation Of All Words	2436
731	Climbing stairs	2430
732	Finding K closest element	2421
733	Delete Nodes and Return Forest Leetcode Solution	2416
734	Deletion in a Binary Tree	2415
735	Reverse Nodes in K-Group	2414
736	An Interesting Method to generate Binary Numbers from 1 to n	2413
737	Longest Increasing Subsequence	2406
738	Score of Parenthesis LeetCode Solution	2405
739	Parallel Courses II LeetCode Solution	2402
740	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2401
741	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2400
742	Delete Nth node from the end of the given linked list	2400
743	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2399
744	Symmetric Tree	2398
745	Iterative Depth First Traversal of Graph	2394
746	Find the first repeating element in an array of integers	2393
747	Merge K Sorted Linked Lists	2385
748	Longest Common Prefix Word by Word Matching	2385
749	Check if all levels of two Binary Tree are anagrams or not	2384
750	Linked List Cycle	2383
751	Kill Process LeetCode Solution	2377
752	Union and Intersection of two Linked Lists	2373
753	Boundary Traversal of binary tree	2372
754	Sort Array by Increasing Frequency Leetcode Solution	2371
755	Minimum Size Subarray Sum	2371
756	Find K Closest Elements LeetCode Solution	2367
757	MiniMax Algorithm	2362
758	Pancake Sorting	2362
759	Verify Preorder Serialization of a Binary Tree	2361
760	Non-overlapping sum of two sets	2360
761	Rearrange an Array Such that arr[i] is equal to i	2359
762	Find Maximum of Minimum for Every Window Size in a Given Array	2358
763	Iterative Preorder Traversal	2356
764	Level of Each node in a Tree from source node	2355
765	Minimum Remove to Make Valid Parentheses LeetCode Solution	2349
766	Nested List Weight Sum II LeetCode Solution	2348
767	New 21 Game	2348
768	Construct Binary Tree from given Parent Array representation	2347
769	Reservoir Sampling	2340
770	Level order traversal using two Queues	2336
771	Check if a queue can be sorted into another queue using a stack	2334
772	Given a binary tree, how do you remove all the half nodes?	2330
773	BFS vs DFS for Binary Tree	2329
774	Find the Difference Leetcode Solution	2327
775	Count pairs from two linked lists whose sum is equal to a given value	2327
776	Valid Anagrams	2325
777	Merging Intervals	2317
778	Reorder Array Using Given Indexes	2315
779	Range LCM Queries	2313
780	Matrix Chain Multiplication	2311
781	Maximum size subarray sum equals k	2309
782	Palindrome Partitioning	2307
783	Smallest Range II Leetcode Solution	2302
784	Flatten Binary Tree to Linked List LeetCode Solution	2298
785	K maximum sums of overlapping contiguous sub-arrays	2298
786	Vertical sum in a given binary tree	2297
787	Maximum Product Subarray	2295
788	Remove Duplicates from Sorted List II	2293
789	Defanging an IP Address LeetCode Solution	2290
790	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2288
791	Print a Binary Tree in Vertical Order	2280
792	Friends Of Appropriate Ages LeetCode Solution	2278
793	Check if Two Expressions With Brackets are Same	2270
794	Valid Triangle Number LeetCode Solution	2264
795	Maximum difference between two elements such as larger element comes after smaller	2262
796	Super Ugly Number	2259
797	Flatten 2D Vector LeetCode Solution	2257
798	Largest Submatrix With Rearrangements LeetCode Solution	2257
799	Find subarray with given sum (Handles Negative Numbers)	2253
800	Find Three Element From Different Three Arrays Such That a + b + c = sum	2251
801	Balanced Binary Tree	2251
802	Number Of Longest Increasing Subsequence	2250
803	Check if any two intervals overlap among a given set of intervals	2248
804	The Painter’s Partition Problem	2244
805	Find Maximum Sum Possible Equal Sum of Three Stacks	2244
806	Find K Length Subarray of Maximum Average	2242
807	Employee Importance LeetCode Solution	2240
808	Minimum Distance Between BST Nodes Leetcode Solution	2238
809	Check if a given array can represent Preorder Traversal of Binary Search Tree	2234
810	Lowest Common Ancestor	2233
811	Boolean Parenthesization Problem	2226
812	Unique Binary Search Trees LeetCode Solution	2225
813	Count number of triplets with product equal to given number	2219
814	Find Peak Element	2218
815	Missing Number	2218
816	Closest Leaf in a Binary Tree LeetCode Solution	2214
817	Check if two nodes are on the same path in a Tree	2214
818	Maximum subsequence sum such that no three are consecutive	2213
819	Minimum insertions to form a palindrome with permutations allowed	2209
820	Create Maximum Number	2209
821	Third Maximum Number Leetcode Solution	2207
822	Array Nesting Leetcode Solution	2207
823	Find Smallest Range Containing Elements from k Lists	2204
824	Largest BST Subtree LeetCode Solution	2202
825	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2199
826	Peak Index in a Mountain Array LeetCode Solution	2196
827	Check Completeness of a Binary Tree LeetCode Solution	2188
828	Find distance between two nodes of a Binary Tree	2187
829	Distinct Subsequences	2185
830	Valid Triangle Number LeetCode Solution	2184
831	Newman-Conway Sequence	2178
832	Hamming Distance	2175
833	Find Sum of all unique sub-array sum for a given array	2174
834	Print All Distinct Elements of a Given Integer Array	2173
835	Find Common Characters Leetcode Solution	2168
836	Maximum number of segments of lengths a, b and c	2168
837	Largest divisible pairs subset	2168
838	Find Element Using Binary Search in Sorted Array	2167
839	Arrange given numbers to form the biggest number	2165
840	Valid Parenthesis String	2164
841	First Bad Version	2160
842	Sorting a K Sorted Array	2157
843	Number of siblings of a given Node in n-ary Tree	2156
844	Print all triplets in sorted array that form AP	2153
845	Merging Two Sorted Arrays	2152
846	Products of ranges in an array	2148
847	Bottom View of a Binary Tree	2144
848	Longest Palindromic Subsequence	2144
849	Sort Elements by Frequency II	2141
850	Path Sum	2139
851	Iterative Postorder Traversal Using Two Stacks	2135
852	Tree Traversal (Preorder, Inorder & Postorder)	2135
853	Lower Case To Upper Case	2132
854	Stone Game IV LeetCode Solution	2128
855	Find the largest multiple of 3	2118
856	Four Elements that Sum to Given	2118
857	Shuffle an Array	2115
858	Largest subarray with equal number of 0s and 1s	2114
859	Diagonal Traversal of Binary Tree	2109
860	Count and Say	2104
861	Print Right View of a Binary Tree	2103
862	Range Sum Query using Sparse Table	2102
863	Stone Game IV LeetCode Solution	2101
864	Merge Two Sorted Arrays	2100
865	Encoded String With Shortest Length LeetCode Solution	2097
866	Median of Two Sorted Arrays	2096
867	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2094
868	Subset Sum Problem in O(sum) space	2092
869	Segment Tree	2091
870	Averages of Levels in Binary Tree	2085
871	Permutations of a Given String Using STL	2084
872	Isomorphic Strings	2083
873	Contiguous Array	2082
874	Binary array after M range toggle operations	2077
875	Longest Bitonic Subsequence	2076
876	Next Greater Element in an Array	2075
877	Closest Binary Search Tree Value Leetcode Solution	2072
878	Find Nth Node	2070
879	Unique Binary Search Trees	2069
880	Maximum Sum of 3 Non-Overlapping Subarrays	2067
881	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2066
882	Valid Number	2064
883	Infix to Postfix	2064
884	Find Largest d in Array such that a + b + c = d	2063
885	Find unique character in a string	2063
886	Red-Black Tree Introduction	2056
887	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2053
888	Orderly Queue LeetCode Solution	2052
889	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2051
890	Count Primes in Ranges	2045
891	Height of a generic tree from parent array	2044
892	Maximum Population Year LeetCode Solution	2043
893	Transform a BST to Greater sum Tree	2039
894	Binary Tree Longest Consecutive Sequence LeetCode Solution	2033
895	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2031
896	Bold Words in String LeetCode Solution	2031
897	Maximum Product Subarray	2026
898	Friends Pairing Problem	2023
899	Minimum sum of squares of character counts in a given string after removing k characters	2013
900	Valid Perfect Square LeetCode Solution	2008
901	Range Minimum Query (Square Root Decomposition and Sparse Table)	2003
902	Insert Delete GetRandom	2003
903	Trapping Rain Water II LeetCode Solution	1998
904	Serialize and Deserialize Binary Tree	1997
905	Sentence Screen Fitting LeetCode Solution	1996
906	Kth Smallest Number in Multiplication Table Leetcode Solution	1996
907	Swap Nodes In Pairs	1992
908	Binary Search Tree Delete Operation	1988
909	Shuffle a given Array	1987
910	Diameter of N-Ary Tree LeetCode Solution	1983
911	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	1977
912	Write a function to get the intersection point of two Linked Lists	1977
913	The Number of Weak Characters in the Game LeetCode Solution	1975
914	Next greater element	1975
915	Integer to Roman	1963
916	Reorganize String	1955
917	Convert BST into a Min-Heap without using array	1954
918	Array Queries for multiply replacements and product	1945
919	Maximum Product Subarray	1942
920	Find Minimum In Rotated Sorted Array	1934
921	K’th Largest Element in BST when modification to BST is not allowed	1928
922	Total Hamming Distance LeetCode Solution	1927
923	Next Greater Element II LeetCode Solution	1925
924	Koko Eating Bananas LeetCode Solution	1924
925	Advantages of BST over Hash Table	1924
926	Maximum Sum Increasing Subsequence	1910
927	Edit Distance	1910
928	Constant time range add operation on an array	1908
929	Best Meeting Point LeetCode Solution	1906
930	Longest Increasing Consecutive Subsequence	1905
931	Lowest Common Ancestor in Binary Search Tree	1904
932	Level Order Traversal of Binary Tree	1904
933	Check if an Array is Stack Sortable	1900
934	Serialize and Deserialize Binary Tree LeetCode Solution	1899
935	Clone a Binary Tree with Random Pointers	1896
936	Find the smallest binary digit multiple of given number	1895
937	Image Overlap LeetCode Solution	1891
938	Moving Stones Until Consecutive Leetcode Solution	1887
939	Power of Two	1886
940	Print n terms of Newman-Conway Sequence	1883
941	Range Queries for Longest Correct Bracket Subsequence	1878
942	K’th Largest element in BST using constant extra space	1878
943	Reverse a Path in BST using Queue	1878
944	Numbers with prime frequencies greater than or equal to k	1876
945	Write Code to Determine if Two Trees are Identical	1875
946	Greatest Sum Divisible by Three LeetCode Solution	1874
947	Valid Tic-Tac-Toe State LeetCode Solution	1873
948	Queries on XOR of greatest odd divisor of the range	1867
949	Design Underground System Leetcode Solution	1866
950	A program to check if a binary tree is BST or not	1866
951	Check for Palindrome after every character replacement Query	1856
952	Count and Toggle Queries on a Binary Array	1855
953	Print Next Greater Number of Q queries	1855
954	Insert into a Sorted Circular Linked List LeetCode Solution	1854
955	Design Add and Search Words Data Structure LeetCode Solution	1854
956	Closest Binary Search Tree Value II LeetCode Solution	1851
957	Find the node with minimum value in a Binary Search Tree	1851
958	Factorial Trailing Zeroes LeetCode Solution	1848
959	Largest Plus Sign Leetcode Solution	1841
960	Number of Orders in the Backlog Leetcode Solution	1839
961	Count the Pairs at Same Distance as in English Alphabets	1838
962	Check if X can give change to every person in the Queue	1837
963	Queries for Decimal Values of Subarrays of a Binary Array	1836
964	Check if each internal node of a BST has exactly one child	1836
965	Maximum Array from Two given Arrays Keeping Order Same	1831
966	Collect maximum points in a grid using two traversals	1827
967	Merge two BSTs with limited extra space	1826
968	Find minimum number of merge operations to make an array palindrome	1822
969	Merge Sort	1821
970	Dividing Array into Pairs With Sum Divisible by K	1819
971	Form minimum number from given sequence	1817
972	Group Shifted Strings Leetcode Solution	1806
973	Number of elements less than or equal to a given number in a given subarray	1802
974	Merge Sorted Array	1801
975	Longest Substring Without Repeating Characters Leetcode Solution	1795
976	Maximum difference between first and last indexes of an element in array	1792
977	Priority Queue	1787
978	Print modified array after multiple array range increment operations	1784
979	Count even length binary sequences with same sum of first and second half bits	1780
980	Cutting a Rod	1771
981	Form Minimum Number From Given Sequence	1766
982	Graph Cloning	1763
983	Find maximum average subarray of k length	1755
984	Swim in Rising Water LeetCode Solution	1747
985	Count Pairs Whose Products Exist in Array	1744
986	Minimum Moves to Equal Array Elements LeetCode Solution	1737
987	Excel Sheet Column Number LeetCode Solution	1735
988	Print Ancestors of a Given Binary Tree Node Without Recursion	1732
989	Unique Paths II	1730
990	Excel Sheet Column Title LeetCode Solution	1719
991	Binary Search Tree	1719
992	Guess The Word	1719
993	Longest Common Prefix using Character by Character Matching	1719
994	Kth Smallest Element in a BST	1718
995	Print all Possible Ways to Break a String in Bracket Form	1718
996	K Empty Slots	1716
997	Decrease Elements To Make Array Zigzag LeetCode Solution	1715
998	Palindrome Partitioning	1712
999	Regular Expression Matching	1710
1000	Check given array of size n can represent BST of n levels or not	1708
1001	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1705
1002	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1705
1003	Binary Search Tree Search and Insertion	1694
1004	How to print maximum number of A’s using given four keys	1693
1005	Sum of Left Leaves LeetCode Solution	1676
1006	Find postorder traversal of BST from preorder traversal	1662
1007	Sorted Array to Balanced BST	1660
1008	Maximum weight transformation of a given string	1652
1009	Queries for Number of Distinct Elements in a Subarray	1634
1010	Construct Complete Binary Tree from its Linked List Representation	1628
1011	Find the Town Judge LeetCode Solution	1619
1012	Maximum Depth Of Binary Tree	1613
1013	Symmetric Tree LeetCode Solution Leetcode Solution	1606
1014	Binary Tree to Binary Search Tree Conversion using STL set	1604
1015	Iterative method to find ancestors of a given binary tree	1604
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1603
1017	Random Pick Index LeetCode Solution	1585
1018	Search in Sorted Rotated Array	1584
1019	Data Structure Designing	1582
1020	Search an Element in Sorted Rotated Array	1542
1021	Find Maximum Depth of Nested Parenthesis in a String	1542
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1526
1023	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1524
1024	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1505
1025	Next Greater Element I Leetcode Solution	1459
1026	Maximum Binary Tree	1455
1027	Print Maximum Length Chain of Pairs	1442
1028	Flatten Binary Tree to Linked List LeetCode Solution	1425
1029	Find k-th smallest element in BST (Order Statistics in BST)	1395
1030	Peeking Iterator LeetCode Solution	1389
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1379