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	42751
2	Maximum occurring character in a string	19471
3	Plus One Leetcode Solution	18812
4	Valid Parentheses LeetCode Solution	18737
5	3Sum Leetcode Solution	16699
6	First Repeating Element	14861
7	Merge Sorted Arrays Leetcode Solution	14679
8	Single Number Leetcode Solution	14582
9	Count Primes Leetcode Solutions	14263
10	Pow(x, n) Leetcode Solution	13887
11	Sqrt(x) Leetcode Solution	13675
12	Meeting Rooms II LeetCode Solution	12864
13	Concatenation of Array LeetCode Solution	12453
14	Roman to Integer Leetcode Solution	11662
15	Valid Palindrome Leetcode Solution	11491
16	Search Insert Position Leetcode Solution	11489
17	Contains Duplicate II Leetcode Solution	11445
18	Palindrome Number LeetCode Solution	11301
19	Jump Game Leetcode Solution	10919
20	Reverse Vowels of a String Leetcode Solution	10905
21	Remove Duplicates from Sorted Array Leetcode Solution	10778
22	Intersection of Two Arrays II Leetcode Solution	10767
23	Number of Good Pairs Leetcode Solution	10662
24	Longest Substring Without Repeating Characters LeetCode Solution	10615
25	Spiral Matrix LeetCode Solution	10565
26	Kids With the Greatest Number of Candies Leetcode Solution	10520
27	House Robber Leetcode Solution	10414
28	Add Binary Leetcode Solution	10354
29	Maximum Subarray Leetcode Solution	10000
30	Find the Maximum Repeating Number in Array	9764
31	Number Of 1 bits	9742
32	Text Justification LeetCode Solution	9594
33	Jewels and Stones Leetcode Solution	9484
34	Move Zeroes LeetCode Solution	9396
35	Power of Two Leetcode Solution	9341
36	Longest Palindromic Substring LeetCode Solution	9324
37	Min Stack Leetcode Solution	9305
38	Permutations Leetcode Solution	9164
39	Shuffle String Leetcode Solution	9092
40	Third Maximum Number Leetcode Solution	9004
41	Word Search Leetcode Solution	8995
42	Find All Numbers Disappeared in an Array Leetcode Solution	8963
43	Next Permutation Leetcode Solution	8953
44	Daily Temperatures Leetcode Solution	8936
45	Median of Two Sorted Arrays LeetCode Solution	8895
46	Search in Rotated Sorted Array Leetcode Solution	8830
47	Number of Islands LeetCode Solution	8805
48	Kth Missing Positive Number Leetcode Solution	8736
49	Maximum Profit in Job Scheduling Leetcode Solution	8716
50	Longest Common Prefix Leetcode Solution	8697
51	Evaluation of Postfix Expression	8689
52	Next Greater Element I Leetcode Solution	8634
53	Frog Jump Leetcode Solution	8551
54	Find Minimum Distance Between Two Numbers in an Array	8399
55	Running Sum of 1d Array Leetcode Solution	8309
56	Valid Anagram Leetcode Solution	8283
57	Rotate Image LeetCode Solution	8270
58	Multiply Strings Leetcode Solution	8242
59	Shuffle the Array Leetcode Solution	8221
60	Combination Sum Leetcode Solution	8195
61	Can Place Flowers LeetCode Solution	8184
62	3Sum Closest LeetCode Solution	8118
63	House Robber II Leetcode Solution	8112
64	Bulb Switcher LeetCode Solution	8110
65	Count and Say Leetcode Solution	8099
66	Excel Sheet Column Title Leetcode Solution	7881
67	Koko Eating Bananas Leetcode Solution	7846
68	Isomorphic Strings Leetcode Solution	7834
69	Happy Number Leetcode Solution	7811
70	Subarray and Subsequence	7800
71	Best Time to Buy and Sell Stock LeetCode Solution	7724
72	Count Pairs With Given Sum	7721
73	Integer to Roman Leetcode Solution	7701
74	Missing Number Leetcode Solution	7699
75	Majority Element Leetcode Solution	7691
76	Product of array except self	7680
77	Strobogrammatic Number LeetCode Solution	7634
78	Rotate String LeetCode Solution	7586
79	Reverse String Without Temporary Variable	7544
80	Candy LeetCode Solution	7536
81	Is Subsequence Leetcode Solution	7455
82	Find the Difference Leetcode Solution	7437
83	Largest Number Leetcode Solution	7350
84	A Product Array Puzzle	7334
85	Find the Duplicate Number LeetCode Solution	7317
86	Find Common Characters Leetcode Solution	7316
87	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7304
88	Expression Evaluation	7285
89	Binary Search LeetCode Solution	7257
90	String to Integer (atoi) LeetCode Solution	7231
91	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7214
92	Subset Leetcode	7133
93	Set Matrix Zeroes	7131
94	Summary Ranges Leetcode Solution	7094
95	Rabin Karp Algorithm	7010
96	Sort Characters By Frequency LeetCode Solution	7008
97	Word Pattern LeetCode Solution	6990
98	Find the Town Judge Leetcode Solution	6987
99	Balanced Binary Tree Leetcode Solution	6967
100	Unique Paths Leetcode Solution	6923
101	Find the Winner of the Circular Game LeetCode Solution	6893
102	Arranging Coins Leetcode Solution	6893
103	String Compression LeetCode Solution	6821
104	Rearrange Positive and Negative Numbers Alternatively in Array	6817
105	Repeated Substring Pattern LeetCode Solution	6726
106	Asteroid Collision LeetCode Solution	6716
107	Group Anagrams LeetCode Solution	6703
108	Smallest window in a string containing all characters of another string	6683
109	Sort Colors LeetCode Solution	6645
110	Page Replacement Algorithms in Operating Systems	6585
111	Postfix to Infix Conversion	6538
112	Best Time to Buy and Sell Stock II Leetcode Solution	6533
113	Matrix Chain Multiplication using Dynamic Programming	6521
114	Sort Array By Parity LeetCode Solution	6518
115	Zigzag Conversion LeetCode Solution	6467
116	Divide Two Integers Leetcode Solution	6445
117	Valid Palindrome II Leetcode Solution	6434
118	Sum of minimum and maximum elements of all subarrays of size k	6399
119	Kth largest element in an Array Leetcode Solutions	6358
120	Generate Parentheses Leetcode Solution	6350
121	Product of Array Except Self LeetCode Solution	6302
122	Reverse Integer Leetcode Solution	6294
123	Assign Cookies Leetcode Solution	6287
124	Remove Duplicates from Sorted Array II Leetcode Solution	6264
125	Length of Last Word Leetcode Solution	6208
126	Bus Routes Leetcode Solution	6203
127	Merge Two Sorted Lists Leetcode Solutions	6202
128	Decode String Leetcode Solution	6180
129	Pascal Triangle Leetcode	6175
130	H-Index Leetcode Solution	6174
131	Number of Provinces Leetcode Solution	6172
132	Linked List Cycle II LeetCode Solution	6112
133	Convert array into Zig-Zag fashion	6080
134	Minimum Steps to reach target by a Knight	6065
135	Defanging an IP Address Leetcode Solution	6052
136	Optimal Account Balancing LeetCode Solution	6034
137	Employee Free Time LeetCode Solution	6027
138	Minimum Cost For Tickets Leetcode Solution	6001
139	Find the Row with Maximum Number of 1’s	5992
140	Prefix to Infix Conversion	5939
141	First element occurring k times in an array	5930
142	Pascal’s Triangle II Leetcode Solution	5915
143	Build Array From Permutation Leetcode Solution	5900
144	Find First and Last Position of Element in Sorted Array Leetcode Solution	5878
145	Increasing Triplet Subsequence LeetCode Solution	5864
146	Implementation of Deque using Doubly Linked List	5823
147	Majority Element II Leetcode Solution	5797
148	Island Perimeter Leetcode Solution	5786
149	Robot Room Cleaner Leetcode Solution	5775
150	Bellman Ford Algorithm	5766
151	Merge Sorted Array LeetCode Solution	5746
152	Max Consecutive Ones Leetcode Solution	5727
153	Find Pair with Given Difference	5707
154	Check if the Elements of an Array are Consecutive	5694
155	Swap Nodes in Pairs Leetcode Solutions	5692
156	K-th Smallest Element in a Sorted Matrix	5684
157	Guess Number Higher or Lower LeetCode Solution	5659
158	Fibonacci Number LeetCode Solution	5642
159	OSI Model	5631
160	First negative integer in every window of size k	5611
161	KMP Algorithm	5609
162	Design Parking System Leetcode Solution	5602
163	Find the Missing Number	5601
164	Add Two Numbers II Leetcode Solution	5580
165	Subarray Sum Equals K LeetCode Solution	5574
166	Lemonade Change Leetcode Solution	5554
167	Delete middle element of a stack	5553
168	Set Matrix Zeroes Leetcode Solution	5537
169	Trapping Rain Water Leetcode Solution	5527
170	Coin Change 2 Leetcode Solution	5525
171	String Compression	5515
172	First Unique Character in a String LeetCode Solution	5509
173	Subarray Product Less Than K LeetCode Solution	5503
174	Length of the largest subarray with contiguous elements	5499
175	Find All Duplicates in an Array LeetCode Solution	5478
176	Last Stone Weight	5476
177	Word Ladder LeetCode Solution	5474
178	Capacity To Ship Packages Within D Days Leetcode Solution	5468
179	Palindrome Linked List Leetcode Solution	5461
180	Monotonic Array LeetCode Solution	5460
181	Subarray with Given Sum	5425
182	Find Smallest Missing Number in a Sorted Array	5411
183	Repeated Substring Pattern	5399
184	Form Minimum Number from Given Sequence of D’s and I’s	5387
185	Combinations Leetcode Solution	5355
186	Remove Duplicates from Sorted List II LeetCode Solution	5340
187	01 Matrix LeetCode Solution	5311
188	Reverse Words in a String III LeetCode Solution	5298
189	Single Element in a Sorted Array LeetCode Solution	5281
190	Continuous Subarray Sum LeetCode Solution	5278
191	Valid Perfect Square Leetcode Solution	5275
192	Same Tree LeetCode Solution	5271
193	Iterative Implementation of Quick Sort	5259
194	Prefix to Postfix Conversion	5216
195	Break a Palindrome LeetCode Solution	5192
196	Remove Linked List Elements Leetcode Solution	5177
197	Merge k Sorted Lists Leetcode Solution	5165
198	Slowest Key Leetcode Solution	5161
199	Backspace String Compare	5151
200	Combination Sum	5146
201	Leetcode Permutations	5137
202	Relative Ranks Leetcode Solution	5117
203	Rotate List Leetcode Solution	5074
204	Maximum Product of Three Numbers LeetCode Solution	5061
205	Find the Duplicate Element	5059
206	The K Weakest Rows in a Matrix Leetcode Solution	5057
207	Top K Frequent Elements LeetCode Solution	5048
208	Find Peak Element LeetCode Solution	5034
209	Insert Delete GetRandom O(1) Leetcode Solution	5018
210	Container With Most Water LeetCode Solution	5000
211	Second Most Repeated Word in a Sequence	4987
212	Longest Common Subsequence LeetCode Solution	4985
213	Printing brackets in Matrix Chain Multiplication Problem	4976
214	Kth Largest Element in a Stream Leetcode Solution	4960
215	Cuckoo sequence program	4944
216	Palindrome Number	4943
217	Remove All Occurrences of a Substring LeetCode Solution	4942
218	Make The String Great Leetcode Solution	4923
219	Rearrange given Array in Maximum Minimum Form	4910
220	Relative Sort Array Leetcode Solution	4899
221	Subarray Sum Equals k	4899
222	Contains Duplicate LeetCode Solution	4898
223	Max Area of Island	4890
224	Permutation in String Leetcode Solution	4889
225	Unique Paths II Leetcode Solution	4877
226	Convert a Number to Hexadecimal Leetcode Solution	4875
227	Delete Node in a Linked List Leetcode Solution	4850
228	Generate all Binary Strings Without Consecutive 1’s	4837
229	Arithmetic Expression Evaluation	4836
230	Find Leaders in an Array	4835
231	Target Sum	4831
232	Check If Two String Arrays are Equivalent Leetcode Solution	4824
233	Time Based Key-Value Store LeetCode Solution	4798
234	N-Queens LeetCode Solution	4795
235	Moving Average from Data Stream Leetcode Solution	4790
236	Scramble String	4768
237	Count Good Nodes in Binary Tree Leetcode Solution	4765
238	Construct Binary Tree from Given Inorder and Preorder Traversals	4756
239	Given two unsorted arrays find all pairs whose sum is x	4749
240	Number of Dice Rolls With Target Sum LeetCode Solution	4748
241	Find N Unique Integers Sum up to Zero Leetcode Solution	4748
242	Letter Combinations of a Phone Number	4738
243	Next Permutation	4731
244	LRU Cache LeetCode Solution	4713
245	Check If N and Its Double Exist Leetcode Solution	4710
246	Find Triplet in Array With a Given Sum	4698
247	Stone Game LeetCode	4682
248	Flipping an Image LeetCode Solution	4658
249	Minimum swaps required to bring all elements less than or equal to k together	4643
250	Number of Steps to Reduce a Number to Zero Leetcode Solution	4640
251	Prim’s Algorithm	4639
252	Reverse Only Letters LeetCode Solution	4636
253	Remove Minimum Characters so that Two Strings Become Anagrams	4620
254	Min Cost Climbing Stairs LeetCode Solution	4608
255	Find The Duplicate Number	4600
256	Stock Buy Sell to Maximize Profit	4600
257	Student Attendance Record I Leetcode Solution	4584
258	Minimum Knight Moves LeetCode Solution	4578
259	Top K Frequent Elements	4569
260	To Lower Case Leetcode Solution	4543
261	Minimum Operations to convert X to Y	4521
262	The kth Factor of n Leetcode Solution	4510
263	Smallest Positive Number Missing in an Unsorted Array	4508
264	Min Stack	4507
265	License Key Formatting Leetcode Solution	4503
266	Reverse words in a string	4491
267	Maximum Subarray Sum using Divide and Conquer	4472
268	Maximum Sum Increasing Subsequence	4440
269	Single Number	4429
270	Maximum Population Year LeetCode Solution	4421
271	Search Suggestions System LeetCode Solution	4412
272	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4397
273	Find the Number Occurring Odd Number of Times in an Array	4389
274	Sum of Subarray Ranges Leetcode Solution	4378
275	Reformat Date LeetCode Solution	4377
276	Find Words That Can Be Formed by Characters Leetcode Solution	4375
277	Top K Frequent Words LeetCode Solution	4373
278	Longest Common Subsequence	4368
279	Remove Nth Node From End of List Leetcode Solution	4351
280	Minimum Path Sum Leetcode Solution	4326
281	Maximum Depth of Binary Tree Leetcode Solution	4297
282	N-th Tribonacci Number Leetcode Solution	4295
283	Reveal Cards In Increasing Order Leetcode Solution	4279
284	Reverse individual words	4278
285	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4269
286	Intersection of Two Arrays	4267
287	BFS for Disconnected Graph	4265
288	Evaluate Division	4240
289	Last Stone Weight II LeetCode Solution	4236
290	Maximize Distance to Closest Person LeetCode Solution	4231
291	House Robber	4230
292	Minimum Characters to be Added at Front to Make String Palindrome	4224
293	Best Time to Buy and Sell Stock III Leetcode Solution	4218
294	Diagonal Traverse LeetCode Solution	4214
295	Remove Duplicates from Sorted List LeetCode Solution	4213
296	Find any one of the multiple repeating elements in read only array	4209
297	Count Number of Occurrences in a Sorted Array	4183
298	Count of index pairs with equal elements in an array	4181
299	Length of Longest valid Substring	4180
300	Design A Leaderboard Leetcode Solution	4175
301	Binary Tree Inorder Traversal LeetCode Solution	4174
302	Find if Path Exists in Graph Leetcode Solution	4168
303	Sort Elements by Frequency of Occurrences	4159
304	Most Frequent Element in an Array	4149
305	Minimum number of Merge Operations to make an Array Palindrome	4131
306	Implement a stack using single queue	4115
307	Maximum Size Subarray Sum Equals k Leetcode Solution	4110
308	Range Sum Query 2D – Immutable Leetcode Solution	4104
309	Find the Closest Palindrome number	4083
310	Reverse Nodes in k-Group LeetCode Solution	4079
311	Brightest Position on Street LeetCode Solution	4076
312	Find Leaves of Binary Tree LeetCode Solution	4069
313	Mobile Numeric Keypad Problem	4066
314	Reverse Bits	4044
315	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4043
316	Remove All Ones With Row and Column Flips Leetcode Solution	4036
317	Spiral Matrix II Leetcode Solution	4031
318	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4030
319	Sudoku Solver	4029
320	Special Positions in a Binary Matrix Leetcode Solution	4026
321	Invalid Transactions LeetCode Solution	4023
322	Sort Array By Parity II Leetcode Solution	4007
323	Symmetric Tree Leetcode Solution	4000
324	Shortest Word Distance Leetcode Solution	3999
325	Paint House LeetCode Solution	3983
326	Arrange given Numbers to Form the Biggest Number II	3972
327	Diagonal Traversal LeetCode Solution	3971
328	One Edit Distance LeetCode Solution	3967
329	Maximum Subarray	3951
330	Find Duplicates in an Array in Most Efficient Way	3946
331	Split Linked List in Parts Leetcode Solution	3943
332	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3930
333	Remove Invalid Parentheses Leetcode Solution	3924
334	Rank Transform of an Array Leetcode Solution	3920
335	Jump Game	3915
336	Largest Rectangle in Histogram LeetCode Solution	3914
337	Partition Labels LeetCode Solution	3901
338	Unique Paths	3901
339	Round Robin Scheduling	3897
340	Minimum Moves to Equal Array Elements Leetcode Solution	3894
341	Dijkstra Algorithm	3888
342	Alien Dictionary LeetCode Solution	3881
343	Hamming Distance Leetcode Solution	3879
344	Construct BST from its given Level Order Traversal	3876
345	Range Sum of BST LeetCode Solution	3852
346	Bitwise AND of Numbers Range LeetCode Solution	3848
347	Find Winner on a Tic Tac Toe Game Leetcode Solution	3847
348	Maximal Square	3846
349	The Celebrity Problem	3842
350	Minimum operation to make all elements equal in array	3841
351	Least Number of Unique Integers after K Removals Leetcode Solution	3835
352	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3834
353	Tug of War	3834
354	Minimum Depth of Binary Tree Leetcode Solution	3829
355	Next Permutation LeetCode Solution	3824
356	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3814
357	String Matching in an Array Leetcode Solution	3812
358	Pair of Positive Negative Values in an Array	3804
359	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3798
360	Maximum Circular Subarray Sum	3796
361	Merge Two Sorted Linked Lists	3787
362	Longest Common Prefix using Trie	3787
363	Check whether Strings are K Distance Apart or Not	3786
364	Smallest Subarray with k Distinct Numbers	3778
365	Given an Array of Pairs Find all Symmetric Pairs in it	3775
366	Transpose Graph	3770
367	Minimum Time Visiting All Points Leetcode Solution	3768
368	Minimum Cost to Hire K Workers	3765
369	K Empty Slots LeetCode	3758
370	Count of Triplets With Sum Less than Given Value	3758
371	Clone Graph LeetCode Solution	3754
372	Next Greater Element III LeetCode Solution	3752
373	Find minimum difference between any two elements	3733
374	Unique Paths III LeetCode Solution	3730
375	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3727
376	Sort a stack using a temporary stack	3727
377	Implementation of Deque using circular array	3724
378	Validate Stack Sequences LeetCode Solution	3722
379	Regular Expression Matching Regular Expression Matching LeetCode Solution	3722
380	Check if a given array contains duplicate elements within k distance from each other	3721
381	Robot Bounded In Circle LeetCode Solution	3719
382	Ugly Number II LeetCode Solution	3715
383	Minimize Maximum Pair Sum in Array LeetCode Solution	3710
384	Postfix to Prefix Conversion	3709
385	Substring with Concatenation of All Words Leetcode Solution	3706
386	Invert Binary Tree LeetCode Solution	3686
387	Invert Binary Tree LeetCode Solution	3684
388	Longest Substring with At Most K Distinct Characters LeetCode Solution	3680
389	Non-decreasing Array LeetCode Solution	3674
390	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3668
391	Permutation Sequence LeetCode Solution	3666
392	Kruskal Algorithm	3662
393	Sliding Window Technique	3660
394	Recursion	3659
395	Design Browser History LeetCode Solution	3650
396	Graph Valid Tree LeetCode Solution	3648
397	Missing Element in Sorted Array LeetCode Solution	3644
398	Longest subarray not having more than K distinct elements	3641
399	LRU Cache Implementation	3641
400	Kth Smallest Element in a BST Leetcode Solution	3637
401	Find the Smallest Divisor given a Threshold Leetcode Solution	3635
402	Find the subarray with least average	3634
403	Find duplicates in a given array when elements are not limited to a range	3633
404	Word Search	3630
405	Find the First and Second Smallest Elements	3628
406	Stack Permutations (Check if an array is stack permutation of other)	3622
407	Toeplitz Matrix	3622
408	Number of Islands II LeetCode Solution	3621
409	Path With Maximum Minimum Value LeetCode Solution	3617
410	Longest subsequence such that difference between adjacents is one	3614
411	Common elements in all rows of a given matrix	3608
412	Boolean Parenthesization Problem	3607
413	First Circular Tour to Visit all the Petrol Bunks	3606
414	Find Top K (or Most Frequent) Numbers in a Stream	3603
415	Stone Game II Leetcode	3603
416	Partition List Leetcode Solution	3600
417	K Closest Points to Origin Leetcode Solution	3599
418	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3597
419	Sequences of given length where every element is more than or equal to twice of previous	3596
420	Queries for counts of array elements with values in given range	3595
421	Find Maximum Level sum in Binary Tree	3591
422	Combination Sum IV LeetCode Solution	3590
423	Max stack	3588
424	Integer Break LeetCode Solution	3581
425	Number Complement Leetcode Solution	3581
426	Snakes and Ladders LeetCode Solution	3577
427	Number of Smaller Elements on Right Side	3574
428	3 Sum	3571
429	Search a 2D Matrix II Leetcode Solution	3564
430	Maximum Number of Occurrences of a Substring Leetcode Solution	3553
431	Painting Fence Algorithm	3553
432	Top View of Binary Tree	3549
433	Minesweeper LeetCode Solution	3544
434	Find the Peak Element from an Array	3541
435	Odd Even Linked List Leetcode Solution	3539
436	Nth Catalan Number	3533
437	Can Make Arithmetic Progression From Sequence Leetcode Solution	3531
438	Longest Palindrome can be Formed by Removing or Rearranging Characters	3527
439	LRU Cache Leetcode Solution	3525
440	Insert Interval Leetcode Solution	3523
441	Sort elements by frequency	3523
442	Priority Queue using doubly linked list	3521
443	Find Minimum in Rotated Sorted Array II LeetCode Solution	3512
444	Maximum Consecutive Numbers Present in an Array	3510
445	Rearrange array such that even positioned are greater than odd	3509
446	Check if Two given Strings are Isomorphic to each other	3501
447	Consecutive Characters LeetCode Solution	3500
448	Search in a Binary Search Tree Leetcode Solution	3496
449	Flood Fill LeetCode	3487
450	High Five LeetCode Solution	3478
451	Distance of nearest cell having 1 in a binary matrix	3471
452	Shortest Palindrome	3463
453	Sliding Window Maximum LeetCode Solution	3452
454	Expression Contains Redundant Bracket or Not	3452
455	Design a stack that supports getMin() in O(1) time and O(1) extra space	3450
456	Move All the Zeros to the End of the Given Array	3442
457	4Sum	3440
458	Replace Elements with Greatest Element on Right Side Leetcode Solution	3436
459	Kth Non-repeating Character	3433
460	Minimum Absolute Difference in BST Leetcode Solution	3432
461	Number of Closed Islands Leetcode Solution	3429
462	Gold Mine Problem	3426
463	Insert into a Binary Search Tree Leetcode Solution	3425
464	Decompress Run-Length Encoded List Leetcode Solution	3421
465	Find a Peak Element II LeetCode Solution	3418
466	Tiling Problem	3416
467	Spiral Matrix III LeetCode Solution	3412
468	Fibonacci Number LeetCode Solution	3409
469	Integer to English words	3407
470	Check If Array Pairs Are Divisible by k LeetCode Solution	3405
471	Queries for GCD of all numbers of an array except elements in a given range	3404
472	Count items common to both the lists but with different prices	3399
473	N queen problem	3397
474	Minimum Path Sum	3394
475	Restore IP Addresses Leetcode Solution	3388
476	Balanced Expression with Replacement	3387
477	Coin Change Problem	3380
478	Trapping Rain Water LeetCode Solution	3378
479	Evaluate Reverse Polish Notation LeetCode Solution	3371
480	Find All Possible Recipes from Given Supplies LeetCode Solution	3371
481	Sorting array using Stacks	3370
482	Longest Common Prefix using Sorting	3368
483	Binary Tree Maximum Path Sum LeetCode Solution	3363
484	Convert Sorted Array to Binary Search Tree Leetcode Solution	3359
485	Sliding Window Median Leetcode Solution	3353
486	Sort an array according to the order defined by another array	3343
487	Majority Element	3342
488	Sort Colors	3340
489	Best Time to Buy and Sell Stock	3337
490	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3331
491	Palindrome Substring Queries	3329
492	Vertical Order Traversal of Binary Tree LeetCode Solution	3328
493	Cells with Odd Values in a Matrix LeetCode Solution	3328
494	Find Pythagorean Triplets from Array	3328
495	Priority Queue in C++	3326
496	Interval Tree	3318
497	Number of Days Between Two Dates LeetCode Solution	3317
498	The Stock Span Problem	3308
499	Reverse a linked list	3308
500	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3300
501	Path Sum II LeetCode Solution	3293
502	Is Graph Bipartite? LeetCode Solution	3281
503	Largest rectangular sub-matrix whose sum is 0	3273
504	Camelcase Matching Leetcode Solution	3272
505	Pancake Sorting Problem	3265
506	Find Median from Data Stream LeetCode Solution	3259
507	Intersection of Two Linked Lists LeetCode Solution	3259
508	Subset sum problem	3258
509	Custom Sort String Leetcode Solution	3256
510	Different Ways to Add Parentheses Leetcode Solution	3253
511	Find the first Repeating Number in a Given Array	3253
512	Kth ancestor of a node in binary tree	3252
513	Queue using Stacks	3251
514	Sieve of Eratosthenes	3251
515	How to Implement Stack Using Priority Queue or Heap?	3249
516	Design Hit Counter LeetCode Solution	3241
517	Divide Chocolate LeetCode Solution	3237
518	Shortest Completing Word Leetcode Solution	3235
519	Multiplication of Two Matrices	3232
520	Analyze User Website Visit Pattern LeetCode Solution	3229
521	Longest Increasing Path in a Matrix LeetCode Solution	3229
522	Scramble String LeetCode Solution	3218
523	Fibonacci numbers	3218
524	Find a Fixed Point in a Given Array	3212
525	Check if Array Contains Contiguous Integers With Duplicates Allowed	3208
526	Count subarrays having total distinct elements same as original array	3208
527	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3206
528	Count Submatrices With All Ones LeetCode Solution	3204
529	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3202
530	Perfect Squares LeetCode Solution	3193
531	Detect a loop in the Linked List	3192
532	Group Anagrams	3191
533	Queue based approach for first non-repeating character in a stream	3188
534	Implement Trie (Prefix Tree) Leetcode Solution	3176
535	Path Crossing Leetcode Solution	3174
536	Monotonic Array Leetcode Solution	3173
537	Number of Distinct Islands Leetcode Solution	3172
538	Reorder Data in Log Files LeetCode Solution	3167
539	Minimum Height Trees	3161
540	Merge Overlapping Intervals	3155
541	Generate all Binary Strings from Given Pattern	3155
542	Valid Boomerang Leetcode Solution	3152
543	Champagne Tower LeetCode Solution	3145
544	Longest Common Prefix using Divide and Conquer	3145
545	Find the Lost Element From a Duplicated Array	3143
546	Construction of Longest Increasing Subsequence (N log N)	3142
547	How to Create Mergable Stack?	3140
548	Nearest Exit from Entrance in Maze LeetCode Solution	3138
549	Insert Node in the Sorted Linked List	3135
550	Maximum Sum of Non Consecutive Elements	3130
551	Decode Ways	3127
552	Sort a stack using recursion	3121
553	Shifting Letters LeetCode Solution	3119
554	Race Car LeetCode Solution	3110
555	First missing positive	3107
556	Find if an Expression has Duplicate Parenthesis or Not	3104
557	Palindrome Permutation LeetCode Solution	3103
558	Build an Array With Stack Operations Leetcode Solution	3102
559	Most Stones Removed with Same Row or Column LeetCode Solution	3097
560	Sliding Window Maximum	3096
561	Recover Binary Search Tree	3095
562	Count Possible Triangles	3095
563	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3094
564	Binary Tree zigzag level order Traversal	3091
565	LCS (Longest Common Subsequence) of three strings	3089
566	Smallest Good Base	3088
567	Find maximum length Snake sequence	3087
568	Merge Two Binary Trees LeetCode Solution	3086
569	Maximum Element in an Array which is Increasing and then Decreasing	3086
570	Find a Sorted Subsequence of size 3	3085
571	Implement strStr() LeetCode Solution	3081
572	Decode String	3080
573	Morris Traversal	3079
574	Rectangle Overlap LeetCode Solution	3077
575	Number of Equivalent Domino Pairs Leetcode Solution	3070
576	Palindrome Partitioning Leetcode Solution	3061
577	Minimum Bracket Reversals	3060
578	Letter Case Permutation	3060
579	Print all Palindromic Partitions of a String	3059
580	Longest Substring with At Least K Repeating Characters LeetCode Solution	3058
581	Minimum Height Trees LeetCode Solution	3057
582	Recover Binary Search Tree Leetcode Solution	3053
583	Guess Number Higher or Lower II	3046
584	Largest Subarray with Equal Number of 0’s and 1’s	3046
585	Contiguous Array LeetCode Solution	3045
586	Distance Between Bus Stops Leetcode Solution	3044
587	Minimum number of jumps to reach end	3043
588	Best Time to Buy and Sell Stock IV LeetCode Solution	3037
589	Longest Repeated Subsequence	3030
590	Maximum Number of Ways to Partition an Array LeetCode Solution	3027
591	K-th Distinct Element in an Array	3023
592	All Possible Full Binary Trees LeetCode Solution	3022
593	Design a Stack With Increment Operation Leetcode Solution	3021
594	Maximum Length of Chain Pairs	3020
595	Find the Town Judge LeetCode Solution	3017
596	Maximum Depth of N-ary Tree Leetcode Solution	3014
597	Reorder an Array According to the Given Indexes	3013
598	Find the two Numbers with Odd Occurrences in an Unsorted Array	2997
599	Design Skiplist LeetCode Solution	2996
600	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2996
601	Mean of Array After Removing Some Elements Leetcode Solution	2991
602	Implement Two Stacks in an Array	2990
603	Subarrays with K Different Integers Leetcode Solution	2985
604	The Maze III LeetCode Solution	2983
605	Check for Balanced Parentheses in an Expression	2981
606	Jump Game IV LeetCode Solution	2979
607	Valid Parentheses Leetcode Solution	2979
608	Sort a String According to Another String	2974
609	Rearrange Spaces Between Words Leetcode Solution	2971
610	Maximize Elements Using Another Array	2971
611	Maximum sum rectangle in a 2D matrix	2961
612	Contains Duplicate	2949
613	Minimum Jumps to Reach Home LeetCode Solution	2938
614	Convert BST to Min Heap	2928
615	Count pair with Given Sum	2926
616	Word Break	2920
617	Palindrome Permutations of a String	2915
618	Perform String Shifts Leetcode	2913
619	Maximum Score After Splitting a String Leetcode Solution	2904
620	Iterative Method to find Height of Binary Tree	2904
621	Valid Sudoku	2904
622	Edit Distance LeetCode Solution	2902
623	Possible Bipartition LeetCode Solution	2899
624	Find the First Circular Tour that visits all the Petrol Pumps	2899
625	Find the Minimum Element in a Sorted and Rotated Array	2891
626	Maximum Product of Splitted Binary Tree LeetCode Solution	2880
627	A Space Optimized DP solution for 0-1 Knapsack Problem	2880
628	Reach a Number LeetCode Solution	2879
629	Best Meeting Point LeetCode Solution	2870
630	Heap Sort	2867
631	Merge Two Balanced Binary Search Trees	2861
632	Number of palindromic paths in a matrix	2856
633	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2850
634	Count Sub Islands LeetCode Solution	2848
635	Merge Overlapping Intervals II	2847
636	Sorted Linked List to Balanced BST	2844
637	Find Largest Value in Each Tree Row LeetCode Solution	2842
638	Segregate 0s and 1s in an Array	2839
639	Find the Subarray of given length with Least Average	2839
640	Brick Wall LeetCode Solution	2830
641	My Calendar I LeetCode Solution	2830
642	Caesar Cipher	2829
643	Swapping Nodes in a Linked List Leetcode Solution	2826
644	Palindromic Substrings Leetcode Solution	2825
645	All Unique Triplets that Sum up to a Given Value	2822
646	Check if the given array can represent Level Order Traversal of Binary Search Tree	2821
647	Construct BST from given Preorder Traversal	2811
648	Level order Traversal in Spiral Form	2811
649	Find First and Last Position of Element in Sorted Array LeetCode Solution	2810
650	Find Median from data Stream	2805
651	Palindrome Permutation	2797
652	Pair with given product	2794
653	Huffman Coding	2787
654	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2786
655	Merge K Sorted Arrays and Print Sorted Output	2785
656	Word Pattern	2780
657	Maximize Sum of Array after K Negations Leetcode Solution	2769
658	Partition Problem	2768
659	Find all triplets with zero sum	2766
660	Validate Binary Search Tree	2755
661	Print Fibonacci sequence using 2 variables	2752
662	Find whether a subarray is in form of a mountain or not	2746
663	Bubble sort using two Stacks	2741
664	Maximum Frequency Stack Leetcode Solution	2738
665	Find all pairs (a, b) in an array such that a % b = k	2737
666	Count Distinct Elements in Every Window of Size K	2735
667	Minimum time required to rot all oranges	2731
668	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2729
669	Isomorphic Strings LeetCode Solution	2727
670	Queries on Probability of Even or Odd Number in given Ranges	2724
671	Add two numbers	2723
672	Counting Bits	2722
673	Convert Sorted List to Binary Search Tree	2721
674	Longest Subarray Having Count of 1s One More than Count of 0s	2719
675	Detect Capital Leetcode Solution	2718
676	How to Efficiently Implement k Stacks in a Single Array?	2716
677	Find four elements that sum to a given value (Hashmap)	2713
678	Largest Sum Contiguous Subarray	2712
679	Count Good Nodes in Binary Tree LeetCode Solution	2711
680	Length of Longest Fibonacci Subsequence	2708
681	Sort 0s 1s and 2s in an Array	2708
682	Split Array Into Consecutive Subsequences	2706
683	Range Sum Query 2D – Immutable LeetCode Solution	2704
684	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2702
685	Binary Tree Right Side View LeetCode Solution	2701
686	Binary Tree to Binary Search Tree Conversion	2696
687	Minimum Swaps to Group All 1’s Together Leetcode Solution	2685
688	Alien Dictionary	2685
689	Rotate Array	2683
690	Remove brackets from an algebraic string containing + and – operators	2682
691	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2672
692	Count ways to reach the nth stair using step 1, 2 or 3	2671
693	Print all subarrays with 0 sum	2671
694	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2670
695	Partition to K Equal Sum Subsets Leetcode Solution	2667
696	Remove Palindromic Subsequences Leetcode Solution	2667
697	Merge Two Sorted Lists Leetcode	2666
698	Populating Next Right Pointers in Each Node Leetcode Solution	2663
699	Populating Next Right Pointers in Each Node	2660
700	Maximum Number of Chocolates to be Distributed Equally Among k Students	2653
701	String comparison containing wildcards	2650
702	Find pairs with given sum such that elements of pair are in different rows	2646
703	Arithmetic Slices II – Subsequence LeetCode Solution	2637
704	Partition Equal Subset Sum	2634
705	Happy Number	2628
706	Breadth First Search (BFS) for a Graph	2623
707	Web Crawler LeetCode Solution	2617
708	Minimum Sum Path in a Triangle	2615
709	Concatenation of Array LeetCode Solution	2614
710	Check if a Linked list of Strings form a Palindrome	2606
711	Topological Sorting	2605
712	Inorder Successor of a node in Binary Tree	2603
713	Queue Reconstruction by Height	2602
714	Difference Array \| Range update query in O(1)	2595
715	Remove duplicates from sorted array	2595
716	Contiguous Array Leetcode	2592
717	Find Duplicate Subtrees	2592
718	Reverse Nodes in K-Group	2591
719	Elements Appear more than N/K times in Array	2588
720	Root to Leaf path with target sum Leetcode Solutions	2584
721	Find All Pairs With a Given Difference	2584
722	Increasing Subsequence of Length three with Maximum Product	2572
723	Check if String Follows Order of Characters by a Pattern or not	2565
724	Swap Kth Node from beginning with Kth Node from End	2564
725	Longest Common Prefix Using Binary Search II	2551
726	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2547
727	Maximum Product Subarray II	2537
728	Container with Most Water	2536
729	Maximum Distance in Array	2533
730	Climbing stairs	2533
731	Count Minimum Steps to Get the given Array	2528
732	Finding K closest element	2527
733	Minimum Swaps to Make Strings Equal Leetcode Solution	2526
734	Sum Root to Leaf Numbers LeetCode Solution	2520
735	Score of Parenthesis LeetCode Solution	2518
736	Symmetric Tree	2515
737	Parallel Courses II LeetCode Solution	2514
738	An Interesting Method to generate Binary Numbers from 1 to n	2510
739	Pancake Sorting	2509
740	Check if all levels of two Binary Tree are anagrams or not	2505
741	Deletion in a Binary Tree	2505
742	Delete Nodes and Return Forest Leetcode Solution	2504
743	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2499
744	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2498
745	Given a binary tree, how do you remove all the half nodes?	2498
746	Substring With Concatenation Of All Words	2497
747	Longest Increasing Subsequence	2496
748	Find the first repeating element in an array of integers	2487
749	Delete Nth node from the end of the given linked list	2482
750	Count pairs from two linked lists whose sum is equal to a given value	2479
751	Boundary Traversal of binary tree	2478
752	Union and Intersection of two Linked Lists	2474
753	Iterative Depth First Traversal of Graph	2474
754	MiniMax Algorithm	2470
755	Linked List Cycle	2466
756	Sort Array by Increasing Frequency Leetcode Solution	2465
757	Kill Process LeetCode Solution	2463
758	Find K Closest Elements LeetCode Solution	2462
759	Minimum Size Subarray Sum	2459
760	Non-overlapping sum of two sets	2457
761	Level of Each node in a Tree from source node	2455
762	Merge K Sorted Linked Lists	2453
763	Iterative Preorder Traversal	2452
764	Level order traversal using two Queues	2450
765	Longest Common Prefix Word by Word Matching	2449
766	BFS vs DFS for Binary Tree	2448
767	Construct Binary Tree from given Parent Array representation	2447
768	Rearrange an Array Such that arr[i] is equal to i	2444
769	Find Maximum of Minimum for Every Window Size in a Given Array	2439
770	Valid Anagrams	2438
771	Minimum Remove to Make Valid Parentheses LeetCode Solution	2434
772	Nested List Weight Sum II LeetCode Solution	2431
773	New 21 Game	2429
774	Check if a queue can be sorted into another queue using a stack	2425
775	Verify Preorder Serialization of a Binary Tree	2423
776	Find the Difference Leetcode Solution	2422
777	Merging Intervals	2422
778	Matrix Chain Multiplication	2418
779	Super Ugly Number	2407
780	Reservoir Sampling	2404
781	Maximum size subarray sum equals k	2402
782	Remove Duplicates from Sorted List II	2398
783	Range LCM Queries	2392
784	Palindrome Partitioning	2392
785	Maximum Product Subarray	2392
786	Flatten Binary Tree to Linked List LeetCode Solution	2388
787	Smallest Range II Leetcode Solution	2388
788	Reorder Array Using Given Indexes	2388
789	K maximum sums of overlapping contiguous sub-arrays	2378
790	Print a Binary Tree in Vertical Order	2377
791	Friends Of Appropriate Ages LeetCode Solution	2374
792	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2370
793	Vertical sum in a given binary tree	2364
794	Balanced Binary Tree	2364
795	Valid Triangle Number LeetCode Solution	2359
796	Defanging an IP Address LeetCode Solution	2359
797	Create Maximum Number	2353
798	Missing Number	2352
799	Maximum difference between two elements such as larger element comes after smaller	2351
800	Check if Two Expressions With Brackets are Same	2350
801	Check if any two intervals overlap among a given set of intervals	2338
802	Minimum Distance Between BST Nodes Leetcode Solution	2334
803	The Painter’s Partition Problem	2331
804	Unique Binary Search Trees LeetCode Solution	2327
805	Find Maximum Sum Possible Equal Sum of Three Stacks	2326
806	Find subarray with given sum (Handles Negative Numbers)	2325
807	Largest Submatrix With Rearrangements LeetCode Solution	2322
808	Flatten 2D Vector LeetCode Solution	2320
809	Number Of Longest Increasing Subsequence	2320
810	Employee Importance LeetCode Solution	2317
811	Check if a given array can represent Preorder Traversal of Binary Search Tree	2316
812	Count number of triplets with product equal to given number	2314
813	Valid Triangle Number LeetCode Solution	2313
814	Lowest Common Ancestor	2313
815	Find Three Element From Different Three Arrays Such That a + b + c = sum	2312
816	Peak Index in a Mountain Array LeetCode Solution	2310
817	Minimum insertions to form a palindrome with permutations allowed	2310
818	Find K Length Subarray of Maximum Average	2307
819	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2295
820	Check if two nodes are on the same path in a Tree	2294
821	Array Nesting Leetcode Solution	2292
822	Closest Leaf in a Binary Tree LeetCode Solution	2290
823	Third Maximum Number Leetcode Solution	2289
824	Hamming Distance	2287
825	Sorting a K Sorted Array	2287
826	Find Peak Element	2285
827	Iterative Postorder Traversal Using Two Stacks	2281
828	Find distance between two nodes of a Binary Tree	2280
829	First Bad Version	2280
830	Check Completeness of a Binary Tree LeetCode Solution	2279
831	Maximum subsequence sum such that no three are consecutive	2279
832	Find Common Characters Leetcode Solution	2277
833	Find Smallest Range Containing Elements from k Lists	2272
834	Print All Distinct Elements of a Given Integer Array	2272
835	Merging Two Sorted Arrays	2271
836	Largest BST Subtree LeetCode Solution	2263
837	Newman-Conway Sequence	2261
838	Tree Traversal (Preorder, Inorder & Postorder)	2261
839	Valid Parenthesis String	2260
840	Products of ranges in an array	2256
841	Find Element Using Binary Search in Sorted Array	2256
842	Print all triplets in sorted array that form AP	2255
843	Distinct Subsequences	2255
844	Find Sum of all unique sub-array sum for a given array	2253
845	Arrange given numbers to form the biggest number	2248
846	Maximum number of segments of lengths a, b and c	2247
847	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2245
848	Largest divisible pairs subset	2245
849	Sort Elements by Frequency II	2244
850	Longest Palindromic Subsequence	2243
851	Lower Case To Upper Case	2235
852	Bottom View of a Binary Tree	2233
853	Diagonal Traversal of Binary Tree	2231
854	Number of siblings of a given Node in n-ary Tree	2227
855	Stone Game IV LeetCode Solution	2222
856	Range Sum Query using Sparse Table	2220
857	Path Sum	2219
858	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2218
859	Largest subarray with equal number of 0s and 1s	2216
860	Stone Game IV LeetCode Solution	2210
861	Find the largest multiple of 3	2210
862	Print Right View of a Binary Tree	2204
863	Segment Tree	2204
864	Contiguous Array	2200
865	Four Elements that Sum to Given	2198
866	Merge Two Sorted Arrays	2198
867	Binary array after M range toggle operations	2195
868	Median of Two Sorted Arrays	2195
869	Shuffle an Array	2187
870	Count and Say	2187
871	Isomorphic Strings	2187
872	Longest Bitonic Subsequence	2180
873	Unique Binary Search Trees	2178
874	Find Nth Node	2177
875	Permutations of a Given String Using STL	2173
876	Subset Sum Problem in O(sum) space	2171
877	Find Largest d in Array such that a + b + c = d	2163
878	Encoded String With Shortest Length LeetCode Solution	2162
879	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2156
880	Maximum Sum of 3 Non-Overlapping Subarrays	2156
881	Valid Number	2154
882	Infix to Postfix	2153
883	Maximum Product Subarray	2149
884	Red-Black Tree Introduction	2148
885	Averages of Levels in Binary Tree	2148
886	Next Greater Element in an Array	2142
887	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2141
888	Find unique character in a string	2140
889	Trapping Rain Water II LeetCode Solution	2139
890	Closest Binary Search Tree Value Leetcode Solution	2131
891	Transform a BST to Greater sum Tree	2130
892	Height of a generic tree from parent array	2129
893	Friends Pairing Problem	2128
894	Count Primes in Ranges	2126
895	Orderly Queue LeetCode Solution	2124
896	Valid Perfect Square LeetCode Solution	2123
897	Maximum Population Year LeetCode Solution	2117
898	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2114
899	Write a function to get the intersection point of two Linked Lists	2112
900	Binary Search Tree Delete Operation	2103
901	Bold Words in String LeetCode Solution	2098
902	Binary Tree Longest Consecutive Sequence LeetCode Solution	2097
903	The Number of Weak Characters in the Game LeetCode Solution	2094
904	Range Minimum Query (Square Root Decomposition and Sparse Table)	2089
905	Sentence Screen Fitting LeetCode Solution	2087
906	Serialize and Deserialize Binary Tree	2085
907	Shuffle a given Array	2085
908	Minimum sum of squares of character counts in a given string after removing k characters	2083
909	Insert Delete GetRandom	2073
910	Kth Smallest Number in Multiplication Table Leetcode Solution	2069
911	Diameter of N-Ary Tree LeetCode Solution	2066
912	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2065
913	Convert BST into a Min-Heap without using array	2057
914	Swap Nodes In Pairs	2055
915	Reorganize String	2049
916	Next greater element	2049
917	Edit Distance	2047
918	Lowest Common Ancestor in Binary Search Tree	2047
919	Find Minimum In Rotated Sorted Array	2040
920	Maximum Product Subarray	2037
921	K’th Largest Element in BST when modification to BST is not allowed	2035
922	Integer to Roman	2033
923	Next Greater Element II LeetCode Solution	2028
924	Total Hamming Distance LeetCode Solution	2021
925	Array Queries for multiply replacements and product	2012
926	Find the smallest binary digit multiple of given number	2012
927	Advantages of BST over Hash Table	2012
928	Queries on XOR of greatest odd divisor of the range	2005
929	Koko Eating Bananas LeetCode Solution	1997
930	Constant time range add operation on an array	1996
931	K’th Largest element in BST using constant extra space	1996
932	Best Meeting Point LeetCode Solution	1992
933	Longest Increasing Consecutive Subsequence	1990
934	Check if an Array is Stack Sortable	1988
935	Write Code to Determine if Two Trees are Identical	1986
936	Serialize and Deserialize Binary Tree LeetCode Solution	1985
937	Print n terms of Newman-Conway Sequence	1979
938	Number of Orders in the Backlog Leetcode Solution	1978
939	Level Order Traversal of Binary Tree	1973
940	Clone a Binary Tree with Random Pointers	1971
941	Reverse a Path in BST using Queue	1969
942	Maximum Sum Increasing Subsequence	1968
943	Power of Two	1968
944	Moving Stones Until Consecutive Leetcode Solution	1966
945	Greatest Sum Divisible by Three LeetCode Solution	1965
946	Image Overlap LeetCode Solution	1956
947	Numbers with prime frequencies greater than or equal to k	1955
948	Design Underground System Leetcode Solution	1954
949	Range Queries for Longest Correct Bracket Subsequence	1954
950	Find minimum number of merge operations to make an array palindrome	1946
951	Valid Tic-Tac-Toe State LeetCode Solution	1944
952	Count and Toggle Queries on a Binary Array	1944
953	Check if X can give change to every person in the Queue	1944
954	Insert into a Sorted Circular Linked List LeetCode Solution	1940
955	A program to check if a binary tree is BST or not	1938
956	Design Add and Search Words Data Structure LeetCode Solution	1937
957	Print Next Greater Number of Q queries	1931
958	Form minimum number from given sequence	1930
959	Find the node with minimum value in a Binary Search Tree	1930
960	Closest Binary Search Tree Value II LeetCode Solution	1929
961	Check if each internal node of a BST has exactly one child	1926
962	Maximum Array from Two given Arrays Keeping Order Same	1919
963	Number of elements less than or equal to a given number in a given subarray	1918
964	Factorial Trailing Zeroes LeetCode Solution	1915
965	Check for Palindrome after every character replacement Query	1915
966	Merge two BSTs with limited extra space	1911
967	Count the Pairs at Same Distance as in English Alphabets	1911
968	Queries for Decimal Values of Subarrays of a Binary Array	1905
969	Largest Plus Sign Leetcode Solution	1903
970	Merge Sort	1894
971	Collect maximum points in a grid using two traversals	1893
972	Maximum difference between first and last indexes of an element in array	1891
973	Graph Cloning	1885
974	Group Shifted Strings Leetcode Solution	1884
975	Dividing Array into Pairs With Sum Divisible by K	1880
976	Merge Sorted Array	1872
977	Priority Queue	1864
978	Count even length binary sequences with same sum of first and second half bits	1857
979	Print modified array after multiple array range increment operations	1857
980	Longest Substring Without Repeating Characters Leetcode Solution	1856
981	Print Ancestors of a Given Binary Tree Node Without Recursion	1850
982	Cutting a Rod	1839
983	Kth Smallest Element in a BST	1837
984	Form Minimum Number From Given Sequence	1827
985	Count Pairs Whose Products Exist in Array	1827
986	Swim in Rising Water LeetCode Solution	1822
987	Excel Sheet Column Number LeetCode Solution	1820
988	Find maximum average subarray of k length	1819
989	Binary Search Tree	1811
990	Unique Paths II	1810
991	Guess The Word	1809
992	Minimum Moves to Equal Array Elements LeetCode Solution	1805
993	Excel Sheet Column Title LeetCode Solution	1797
994	Print all Possible Ways to Break a String in Bracket Form	1793
995	Decrease Elements To Make Array Zigzag LeetCode Solution	1792
996	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1791
997	Check given array of size n can represent BST of n levels or not	1789
998	Palindrome Partitioning	1786
999	K Empty Slots	1785
1000	Longest Common Prefix using Character by Character Matching	1778
1001	Binary Search Tree Search and Insertion	1776
1002	Regular Expression Matching	1773
1003	How to print maximum number of A’s using given four keys	1772
1004	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1761
1005	Sorted Array to Balanced BST	1761
1006	Sum of Left Leaves LeetCode Solution	1749
1007	Find postorder traversal of BST from preorder traversal	1742
1008	Construct Complete Binary Tree from its Linked List Representation	1716
1009	Maximum weight transformation of a given string	1706
1010	Queries for Number of Distinct Elements in a Subarray	1704
1011	Find the Town Judge LeetCode Solution	1694
1012	Maximum Depth Of Binary Tree	1692
1013	Binary Tree to Binary Search Tree Conversion using STL set	1689
1014	Symmetric Tree LeetCode Solution Leetcode Solution	1681
1015	Iterative method to find ancestors of a given binary tree	1676
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1672
1017	Data Structure Designing	1668
1018	Random Pick Index LeetCode Solution	1663
1019	Search in Sorted Rotated Array	1640
1020	Find Maximum Depth of Nested Parenthesis in a String	1625
1021	Search an Element in Sorted Rotated Array	1617
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1592
1023	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1584
1024	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1574
1025	Next Greater Element I Leetcode Solution	1544
1026	Print Maximum Length Chain of Pairs	1525
1027	Maximum Binary Tree	1518
1028	Flatten Binary Tree to Linked List LeetCode Solution	1498
1029	Find k-th smallest element in BST (Order Statistics in BST)	1493
1030	Peeking Iterator LeetCode Solution	1460
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1444