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	42380
2	Maximum occurring character in a string	19340
3	Plus One Leetcode Solution	18615
4	Valid Parentheses LeetCode Solution	18557
5	3Sum Leetcode Solution	16522
6	First Repeating Element	14750
7	Single Number Leetcode Solution	14478
8	Merge Sorted Arrays Leetcode Solution	14422
9	Count Primes Leetcode Solutions	14047
10	Pow(x, n) Leetcode Solution	13714
11	Sqrt(x) Leetcode Solution	13516
12	Meeting Rooms II LeetCode Solution	12686
13	Concatenation of Array LeetCode Solution	12354
14	Roman to Integer Leetcode Solution	11567
15	Search Insert Position Leetcode Solution	11361
16	Valid Palindrome Leetcode Solution	11351
17	Contains Duplicate II Leetcode Solution	11328
18	Palindrome Number LeetCode Solution	11200
19	Reverse Vowels of a String Leetcode Solution	10795
20	Jump Game Leetcode Solution	10770
21	Intersection of Two Arrays II Leetcode Solution	10647
22	Number of Good Pairs Leetcode Solution	10553
23	Remove Duplicates from Sorted Array Leetcode Solution	10497
24	Spiral Matrix LeetCode Solution	10450
25	Longest Substring Without Repeating Characters LeetCode Solution	10426
26	Kids With the Greatest Number of Candies Leetcode Solution	10397
27	House Robber Leetcode Solution	10334
28	Add Binary Leetcode Solution	10226
29	Maximum Subarray Leetcode Solution	9870
30	Find the Maximum Repeating Number in Array	9708
31	Number Of 1 bits	9557
32	Text Justification LeetCode Solution	9545
33	Jewels and Stones Leetcode Solution	9400
34	Power of Two Leetcode Solution	9249
35	Move Zeroes LeetCode Solution	9242
36	Longest Palindromic Substring LeetCode Solution	9239
37	Min Stack Leetcode Solution	9213
38	Permutations Leetcode Solution	9094
39	Shuffle String Leetcode Solution	8981
40	Word Search Leetcode Solution	8875
41	Third Maximum Number Leetcode Solution	8866
42	Find All Numbers Disappeared in an Array Leetcode Solution	8864
43	Next Permutation Leetcode Solution	8843
44	Daily Temperatures Leetcode Solution	8825
45	Median of Two Sorted Arrays LeetCode Solution	8757
46	Number of Islands LeetCode Solution	8715
47	Search in Rotated Sorted Array Leetcode Solution	8662
48	Kth Missing Positive Number Leetcode Solution	8641
49	Maximum Profit in Job Scheduling Leetcode Solution	8625
50	Longest Common Prefix Leetcode Solution	8590
51	Next Greater Element I Leetcode Solution	8554
52	Evaluation of Postfix Expression	8490
53	Frog Jump Leetcode Solution	8471
54	Find Minimum Distance Between Two Numbers in an Array	8331
55	Running Sum of 1d Array Leetcode Solution	8237
56	Rotate Image LeetCode Solution	8177
57	Multiply Strings Leetcode Solution	8160
58	Valid Anagram Leetcode Solution	8149
59	Combination Sum Leetcode Solution	8112
60	Can Place Flowers LeetCode Solution	8103
61	Shuffle the Array Leetcode Solution	8103
62	3Sum Closest LeetCode Solution	8058
63	Bulb Switcher LeetCode Solution	8049
64	House Robber II Leetcode Solution	8031
65	Count and Say Leetcode Solution	8009
66	Excel Sheet Column Title Leetcode Solution	7775
67	Koko Eating Bananas Leetcode Solution	7746
68	Isomorphic Strings Leetcode Solution	7740
69	Subarray and Subsequence	7736
70	Happy Number Leetcode Solution	7711
71	Count Pairs With Given Sum	7638
72	Missing Number Leetcode Solution	7631
73	Product of array except self	7629
74	Integer to Roman Leetcode Solution	7619
75	Majority Element Leetcode Solution	7593
76	Strobogrammatic Number LeetCode Solution	7569
77	Best Time to Buy and Sell Stock LeetCode Solution	7517
78	Rotate String LeetCode Solution	7512
79	Reverse String Without Temporary Variable	7491
80	Candy LeetCode Solution	7418
81	Find the Difference Leetcode Solution	7356
82	Is Subsequence Leetcode Solution	7352
83	Largest Number Leetcode Solution	7237
84	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7232
85	Find Common Characters Leetcode Solution	7231
86	String to Integer (atoi) LeetCode Solution	7162
87	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7155
88	Find the Duplicate Number LeetCode Solution	7145
89	Binary Search LeetCode Solution	7106
90	Expression Evaluation	7103
91	A Product Array Puzzle	7093
92	Set Matrix Zeroes	7077
93	Summary Ranges Leetcode Solution	7023
94	Subset Leetcode	7009
95	Sort Characters By Frequency LeetCode Solution	6926
96	Find the Town Judge Leetcode Solution	6923
97	Word Pattern LeetCode Solution	6899
98	Rabin Karp Algorithm	6898
99	Balanced Binary Tree Leetcode Solution	6894
100	Unique Paths Leetcode Solution	6846
101	Arranging Coins Leetcode Solution	6808
102	Find the Winner of the Circular Game LeetCode Solution	6786
103	String Compression LeetCode Solution	6752
104	Rearrange Positive and Negative Numbers Alternatively in Array	6730
105	Repeated Substring Pattern LeetCode Solution	6665
106	Asteroid Collision LeetCode Solution	6635
107	Smallest window in a string containing all characters of another string	6623
108	Group Anagrams LeetCode Solution	6603
109	Sort Colors LeetCode Solution	6584
110	Best Time to Buy and Sell Stock II Leetcode Solution	6450
111	Sort Array By Parity LeetCode Solution	6448
112	Page Replacement Algorithms in Operating Systems	6424
113	Zigzag Conversion LeetCode Solution	6400
114	Postfix to Infix Conversion	6398
115	Divide Two Integers Leetcode Solution	6342
116	Valid Palindrome II Leetcode Solution	6334
117	Sum of minimum and maximum elements of all subarrays of size k	6333
118	Matrix Chain Multiplication using Dynamic Programming	6320
119	Generate Parentheses Leetcode Solution	6254
120	Product of Array Except Self LeetCode Solution	6254
121	Kth largest element in an Array Leetcode Solutions	6239
122	Reverse Integer Leetcode Solution	6230
123	Assign Cookies Leetcode Solution	6221
124	Remove Duplicates from Sorted Array II Leetcode Solution	6171
125	Bus Routes Leetcode Solution	6126
126	Merge Two Sorted Lists Leetcode Solutions	6125
127	Pascal Triangle Leetcode	6122
128	Number of Provinces Leetcode Solution	6115
129	Length of Last Word Leetcode Solution	6096
130	H-Index Leetcode Solution	6085
131	Linked List Cycle II LeetCode Solution	6066
132	Decode String Leetcode Solution	6061
133	Convert array into Zig-Zag fashion	6014
134	Minimum Steps to reach target by a Knight	6009
135	Defanging an IP Address Leetcode Solution	5995
136	Optimal Account Balancing LeetCode Solution	5972
137	Employee Free Time LeetCode Solution	5968
138	Minimum Cost For Tickets Leetcode Solution	5923
139	First element occurring k times in an array	5888
140	Find the Row with Maximum Number of 1’s	5858
141	Build Array From Permutation Leetcode Solution	5842
142	Pascal’s Triangle II Leetcode Solution	5841
143	Prefix to Infix Conversion	5822
144	Find First and Last Position of Element in Sorted Array Leetcode Solution	5774
145	Increasing Triplet Subsequence LeetCode Solution	5769
146	Implementation of Deque using Doubly Linked List	5760
147	Island Perimeter Leetcode Solution	5714
148	Robot Room Cleaner Leetcode Solution	5709
149	Majority Element II Leetcode Solution	5673
150	Bellman Ford Algorithm	5649
151	Max Consecutive Ones Leetcode Solution	5647
152	Find Pair with Given Difference	5643
153	K-th Smallest Element in a Sorted Matrix	5630
154	Merge Sorted Array LeetCode Solution	5626
155	Swap Nodes in Pairs Leetcode Solutions	5622
156	Check if the Elements of an Array are Consecutive	5605
157	Fibonacci Number LeetCode Solution	5585
158	Guess Number Higher or Lower LeetCode Solution	5549
159	Design Parking System Leetcode Solution	5547
160	KMP Algorithm	5541
161	Find the Missing Number	5540
162	First negative integer in every window of size k	5510
163	Add Two Numbers II Leetcode Solution	5498
164	Delete middle element of a stack	5489
165	OSI Model	5486
166	Coin Change 2 Leetcode Solution	5471
167	Lemonade Change Leetcode Solution	5467
168	Subarray Sum Equals K LeetCode Solution	5463
169	Length of the largest subarray with contiguous elements	5458
170	Subarray Product Less Than K LeetCode Solution	5444
171	First Unique Character in a String LeetCode Solution	5439
172	String Compression	5436
173	Trapping Rain Water Leetcode Solution	5433
174	Capacity To Ship Packages Within D Days Leetcode Solution	5404
175	Last Stone Weight	5403
176	Set Matrix Zeroes Leetcode Solution	5402
177	Word Ladder LeetCode Solution	5379
178	Subarray with Given Sum	5374
179	Find All Duplicates in an Array LeetCode Solution	5369
180	Palindrome Linked List Leetcode Solution	5368
181	Monotonic Array LeetCode Solution	5367
182	Find Smallest Missing Number in a Sorted Array	5351
183	Form Minimum Number from Given Sequence of D’s and I’s	5335
184	Repeated Substring Pattern	5327
185	Combinations Leetcode Solution	5284
186	Remove Duplicates from Sorted List II LeetCode Solution	5264
187	Reverse Words in a String III LeetCode Solution	5239
188	01 Matrix LeetCode Solution	5234
189	Same Tree LeetCode Solution	5225
190	Iterative Implementation of Quick Sort	5212
191	Valid Perfect Square Leetcode Solution	5211
192	Continuous Subarray Sum LeetCode Solution	5199
193	Single Element in a Sorted Array LeetCode Solution	5179
194	Break a Palindrome LeetCode Solution	5130
195	Remove Linked List Elements Leetcode Solution	5126
196	Prefix to Postfix Conversion	5119
197	Backspace String Compare	5115
198	Slowest Key Leetcode Solution	5111
199	Merge k Sorted Lists Leetcode Solution	5091
200	Combination Sum	5088
201	Relative Ranks Leetcode Solution	5057
202	Leetcode Permutations	5053
203	The K Weakest Rows in a Matrix Leetcode Solution	5014
204	Rotate List Leetcode Solution	5004
205	Find the Duplicate Element	5003
206	Maximum Product of Three Numbers LeetCode Solution	4990
207	Find Peak Element LeetCode Solution	4958
208	Second Most Repeated Word in a Sequence	4951
209	Insert Delete GetRandom O(1) Leetcode Solution	4940
210	Top K Frequent Elements LeetCode Solution	4933
211	Printing brackets in Matrix Chain Multiplication Problem	4930
212	Longest Common Subsequence LeetCode Solution	4928
213	Kth Largest Element in a Stream Leetcode Solution	4901
214	Palindrome Number	4882
215	Cuckoo sequence program	4878
216	Make The String Great Leetcode Solution	4858
217	Remove All Occurrences of a Substring LeetCode Solution	4857
218	Rearrange given Array in Maximum Minimum Form	4854
219	Container With Most Water LeetCode Solution	4849
220	Relative Sort Array Leetcode Solution	4839
221	Subarray Sum Equals k	4837
222	Convert a Number to Hexadecimal Leetcode Solution	4831
223	Max Area of Island	4827
224	Unique Paths II Leetcode Solution	4816
225	Delete Node in a Linked List Leetcode Solution	4798
226	Find Leaders in an Array	4796
227	Permutation in String Leetcode Solution	4791
228	Check If Two String Arrays are Equivalent Leetcode Solution	4780
229	Target Sum	4780
230	Generate all Binary Strings Without Consecutive 1’s	4777
231	Contains Duplicate LeetCode Solution	4774
232	Time Based Key-Value Store LeetCode Solution	4749
233	N-Queens LeetCode Solution	4744
234	Moving Average from Data Stream Leetcode Solution	4742
235	Arithmetic Expression Evaluation	4728
236	Given two unsorted arrays find all pairs whose sum is x	4704
237	Count Good Nodes in Binary Tree Leetcode Solution	4698
238	Find N Unique Integers Sum up to Zero Leetcode Solution	4694
239	Scramble String	4691
240	Letter Combinations of a Phone Number	4676
241	Number of Dice Rolls With Target Sum LeetCode Solution	4671
242	LRU Cache LeetCode Solution	4655
243	Next Permutation	4653
244	Construct Binary Tree from Given Inorder and Preorder Traversals	4632
245	Find Triplet in Array With a Given Sum	4625
246	Flipping an Image LeetCode Solution	4609
247	Stone Game LeetCode	4609
248	Minimum swaps required to bring all elements less than or equal to k together	4590
249	Number of Steps to Reduce a Number to Zero Leetcode Solution	4586
250	Check If N and Its Double Exist Leetcode Solution	4581
251	Reverse Only Letters LeetCode Solution	4578
252	Min Cost Climbing Stairs LeetCode Solution	4569
253	Remove Minimum Characters so that Two Strings Become Anagrams	4568
254	Prim’s Algorithm	4559
255	Find The Duplicate Number	4540
256	Stock Buy Sell to Maximize Profit	4539
257	Minimum Knight Moves LeetCode Solution	4533
258	Student Attendance Record I Leetcode Solution	4530
259	To Lower Case Leetcode Solution	4502
260	Top K Frequent Elements	4487
261	Minimum Operations to convert X to Y	4476
262	The kth Factor of n Leetcode Solution	4466
263	Smallest Positive Number Missing in an Unsorted Array	4456
264	License Key Formatting Leetcode Solution	4441
265	Reverse words in a string	4424
266	Maximum Subarray Sum using Divide and Conquer	4415
267	Min Stack	4399
268	Maximum Sum Increasing Subsequence	4388
269	Search Suggestions System LeetCode Solution	4371
270	Maximum Population Year LeetCode Solution	4368
271	Single Number	4350
272	Find the Number Occurring Odd Number of Times in an Array	4344
273	Sum of Subarray Ranges Leetcode Solution	4341
274	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4339
275	Find Words That Can Be Formed by Characters Leetcode Solution	4327
276	Reformat Date LeetCode Solution	4308
277	Top K Frequent Words LeetCode Solution	4304
278	Longest Common Subsequence	4289
279	Remove Nth Node From End of List Leetcode Solution	4269
280	Minimum Path Sum Leetcode Solution	4263
281	N-th Tribonacci Number Leetcode Solution	4234
282	Reverse individual words	4228
283	Intersection of Two Arrays	4228
284	Maximum Depth of Binary Tree Leetcode Solution	4223
285	Reveal Cards In Increasing Order Leetcode Solution	4203
286	Evaluate Division	4201
287	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4199
288	BFS for Disconnected Graph	4199
289	Maximize Distance to Closest Person LeetCode Solution	4185
290	Last Stone Weight II LeetCode Solution	4183
291	House Robber	4179
292	Remove Duplicates from Sorted List LeetCode Solution	4176
293	Best Time to Buy and Sell Stock III Leetcode Solution	4175
294	Minimum Characters to be Added at Front to Make String Palindrome	4165
295	Diagonal Traverse LeetCode Solution	4152
296	Find any one of the multiple repeating elements in read only array	4134
297	Count of index pairs with equal elements in an array	4126
298	Design A Leaderboard Leetcode Solution	4124
299	Find if Path Exists in Graph Leetcode Solution	4123
300	Count Number of Occurrences in a Sorted Array	4116
301	Length of Longest valid Substring	4112
302	Sort Elements by Frequency of Occurrences	4109
303	Most Frequent Element in an Array	4104
304	Binary Tree Inorder Traversal LeetCode Solution	4103
305	Minimum number of Merge Operations to make an Array Palindrome	4065
306	Implement a stack using single queue	4061
307	Range Sum Query 2D – Immutable Leetcode Solution	4055
308	Find the Closest Palindrome number	4029
309	Brightest Position on Street LeetCode Solution	4027
310	Maximum Size Subarray Sum Equals k Leetcode Solution	4016
311	Find Leaves of Binary Tree LeetCode Solution	4004
312	Mobile Numeric Keypad Problem	3999
313	Partition Array Into Three Parts With Equal Sum Leetcode Solution	3987
314	Invalid Transactions LeetCode Solution	3983
315	Reverse Nodes in k-Group LeetCode Solution	3980
316	Reverse Bits	3976
317	Spiral Matrix II Leetcode Solution	3972
318	Special Positions in a Binary Matrix Leetcode Solution	3966
319	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3966
320	Remove All Ones With Row and Column Flips Leetcode Solution	3964
321	Shortest Word Distance Leetcode Solution	3958
322	Symmetric Tree Leetcode Solution	3953
323	Sort Array By Parity II Leetcode Solution	3953
324	Sudoku Solver	3944
325	Arrange given Numbers to Form the Biggest Number II	3931
326	Diagonal Traversal LeetCode Solution	3922
327	Paint House LeetCode Solution	3919
328	One Edit Distance LeetCode Solution	3905
329	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3887
330	Maximum Subarray	3887
331	Find Duplicates in an Array in Most Efficient Way	3873
332	Remove Invalid Parentheses Leetcode Solution	3870
333	Rank Transform of an Array Leetcode Solution	3868
334	Jump Game	3865
335	Split Linked List in Parts Leetcode Solution	3853
336	Partition Labels LeetCode Solution	3847
337	Unique Paths	3846
338	Construct BST from its given Level Order Traversal	3842
339	Minimum Moves to Equal Array Elements Leetcode Solution	3841
340	Alien Dictionary LeetCode Solution	3839
341	Hamming Distance Leetcode Solution	3826
342	Largest Rectangle in Histogram LeetCode Solution	3822
343	Round Robin Scheduling	3810
344	Tug of War	3799
345	Minimum operation to make all elements equal in array	3798
346	Bitwise AND of Numbers Range LeetCode Solution	3797
347	Maximal Square	3796
348	Least Number of Unique Integers after K Removals Leetcode Solution	3793
349	Minimum Depth of Binary Tree Leetcode Solution	3788
350	Dijkstra Algorithm	3788
351	Find Winner on a Tic Tac Toe Game Leetcode Solution	3786
352	Range Sum of BST LeetCode Solution	3784
353	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3784
354	The Celebrity Problem	3783
355	Next Permutation LeetCode Solution	3772
356	Pair of Positive Negative Values in an Array	3764
357	Maximum Circular Subarray Sum	3763
358	String Matching in an Array Leetcode Solution	3762
359	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3759
360	Check whether Strings are K Distance Apart or Not	3748
361	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3745
362	Smallest Subarray with k Distinct Numbers	3742
363	Given an Array of Pairs Find all Symmetric Pairs in it	3725
364	Merge Two Sorted Linked Lists	3725
365	Minimum Time Visiting All Points Leetcode Solution	3719
366	Minimum Cost to Hire K Workers	3717
367	Count of Triplets With Sum Less than Given Value	3717
368	Clone Graph LeetCode Solution	3711
369	Longest Common Prefix using Trie	3710
370	K Empty Slots LeetCode	3705
371	Transpose Graph	3700
372	Next Greater Element III LeetCode Solution	3695
373	Sort a stack using a temporary stack	3688
374	Check if a given array contains duplicate elements within k distance from each other	3681
375	Regular Expression Matching Regular Expression Matching LeetCode Solution	3679
376	Find minimum difference between any two elements	3679
377	Implementation of Deque using circular array	3675
378	Minimize Maximum Pair Sum in Array LeetCode Solution	3672
379	Robot Bounded In Circle LeetCode Solution	3665
380	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3663
381	Ugly Number II LeetCode Solution	3658
382	Unique Paths III LeetCode Solution	3648
383	Postfix to Prefix Conversion	3641
384	Non-decreasing Array LeetCode Solution	3633
385	Substring with Concatenation of All Words Leetcode Solution	3626
386	Validate Stack Sequences LeetCode Solution	3624
387	Invert Binary Tree LeetCode Solution	3624
388	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3618
389	Invert Binary Tree LeetCode Solution	3616
390	Sliding Window Technique	3609
391	Permutation Sequence LeetCode Solution	3606
392	Longest Substring with At Most K Distinct Characters LeetCode Solution	3603
393	Longest subarray not having more than K distinct elements	3603
394	Graph Valid Tree LeetCode Solution	3594
395	Find the Smallest Divisor given a Threshold Leetcode Solution	3591
396	Find duplicates in a given array when elements are not limited to a range	3591
397	Missing Element in Sorted Array LeetCode Solution	3590
398	LRU Cache Implementation	3589
399	Kth Smallest Element in a BST Leetcode Solution	3584
400	Find the subarray with least average	3584
401	Stack Permutations (Check if an array is stack permutation of other)	3582
402	Design Browser History LeetCode Solution	3581
403	Find the First and Second Smallest Elements	3581
404	Longest subsequence such that difference between adjacents is one	3578
405	First Circular Tour to Visit all the Petrol Bunks	3578
406	Number of Islands II LeetCode Solution	3575
407	Find Top K (or Most Frequent) Numbers in a Stream	3573
408	Path With Maximum Minimum Value LeetCode Solution	3572
409	Find Maximum Level sum in Binary Tree	3564
410	Kruskal Algorithm	3564
411	Stone Game II Leetcode	3563
412	Common elements in all rows of a given matrix	3562
413	Word Search	3559
414	Toeplitz Matrix	3559
415	Queries for counts of array elements with values in given range	3558
416	K Closest Points to Origin Leetcode Solution	3556
417	Sequences of given length where every element is more than or equal to twice of previous	3553
418	Combination Sum IV LeetCode Solution	3551
419	Snakes and Ladders LeetCode Solution	3539
420	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3538
421	Partition List Leetcode Solution	3537
422	Integer Break LeetCode Solution	3534
423	Recursion	3534
424	Number Complement Leetcode Solution	3530
425	Search a 2D Matrix II Leetcode Solution	3528
426	Number of Smaller Elements on Right Side	3524
427	Painting Fence Algorithm	3523
428	Max stack	3519
429	Maximum Number of Occurrences of a Substring Leetcode Solution	3512
430	Find the Peak Element from an Array	3497
431	3 Sum	3492
432	Longest Palindrome can be Formed by Removing or Rearranging Characters	3491
433	Odd Even Linked List Leetcode Solution	3489
434	Minesweeper LeetCode Solution	3484
435	Sort elements by frequency	3483
436	Top View of Binary Tree	3478
437	Priority Queue using doubly linked list	3473
438	LRU Cache Leetcode Solution	3469
439	Maximum Consecutive Numbers Present in an Array	3465
440	Nth Catalan Number	3465
441	Consecutive Characters LeetCode Solution	3464
442	Insert Interval Leetcode Solution	3462
443	Search in a Binary Search Tree Leetcode Solution	3462
444	Can Make Arithmetic Progression From Sequence Leetcode Solution	3461
445	Rearrange array such that even positioned are greater than odd	3459
446	Check if Two given Strings are Isomorphic to each other	3455
447	Find Minimum in Rotated Sorted Array II LeetCode Solution	3445
448	Flood Fill LeetCode	3440
449	Expression Contains Redundant Bracket or Not	3409
450	Distance of nearest cell having 1 in a binary matrix	3399
451	Design a stack that supports getMin() in O(1) time and O(1) extra space	3398
452	Shortest Palindrome	3397
453	Number of Closed Islands Leetcode Solution	3394
454	Kth Non-repeating Character	3393
455	High Five LeetCode Solution	3389
456	Replace Elements with Greatest Element on Right Side Leetcode Solution	3385
457	Move All the Zeros to the End of the Given Array	3384
458	Decompress Run-Length Encoded List Leetcode Solution	3382
459	Minimum Absolute Difference in BST Leetcode Solution	3382
460	Find a Peak Element II LeetCode Solution	3378
461	4Sum	3377
462	Sliding Window Maximum LeetCode Solution	3369
463	Check If Array Pairs Are Divisible by k LeetCode Solution	3368
464	Gold Mine Problem	3361
465	Spiral Matrix III LeetCode Solution	3360
466	Insert into a Binary Search Tree Leetcode Solution	3360
467	Integer to English words	3354
468	Tiling Problem	3344
469	Minimum Path Sum	3343
470	N queen problem	3340
471	Restore IP Addresses Leetcode Solution	3336
472	Queries for GCD of all numbers of an array except elements in a given range	3332
473	Binary Tree Maximum Path Sum LeetCode Solution	3328
474	Balanced Expression with Replacement	3328
475	Sorting array using Stacks	3322
476	Longest Common Prefix using Sorting	3322
477	Convert Sorted Array to Binary Search Tree Leetcode Solution	3319
478	Coin Change Problem	3318
479	Find All Possible Recipes from Given Supplies LeetCode Solution	3314
480	Trapping Rain Water LeetCode Solution	3309
481	Best Time to Buy and Sell Stock	3308
482	Count items common to both the lists but with different prices	3303
483	Sort Colors	3300
484	Majority Element	3299
485	Priority Queue in C++	3295
486	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3294
487	Find Pythagorean Triplets from Array	3292
488	Sliding Window Median Leetcode Solution	3288
489	Fibonacci Number LeetCode Solution	3285
490	Evaluate Reverse Polish Notation LeetCode Solution	3285
491	Cells with Odd Values in a Matrix LeetCode Solution	3285
492	Palindrome Substring Queries	3285
493	Number of Days Between Two Dates LeetCode Solution	3275
494	The Stock Span Problem	3270
495	Vertical Order Traversal of Binary Tree LeetCode Solution	3266
496	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3263
497	Interval Tree	3255
498	Sort an array according to the order defined by another array	3253
499	Reverse a linked list	3247
500	Is Graph Bipartite? LeetCode Solution	3246
501	Path Sum II LeetCode Solution	3237
502	Largest rectangular sub-matrix whose sum is 0	3235
503	Pancake Sorting Problem	3231
504	Camelcase Matching Leetcode Solution	3214
505	Find the first Repeating Number in a Given Array	3214
506	Different Ways to Add Parentheses Leetcode Solution	3209
507	How to Implement Stack Using Priority Queue or Heap?	3209
508	Queue using Stacks	3208
509	Kth ancestor of a node in binary tree	3206
510	Custom Sort String Leetcode Solution	3204
511	Intersection of Two Linked Lists LeetCode Solution	3203
512	Shortest Completing Word Leetcode Solution	3201
513	Design Hit Counter LeetCode Solution	3197
514	Sieve of Eratosthenes	3191
515	Longest Increasing Path in a Matrix LeetCode Solution	3190
516	Divide Chocolate LeetCode Solution	3188
517	Find Median from Data Stream LeetCode Solution	3181
518	Multiplication of Two Matrices	3177
519	Check if Array Contains Contiguous Integers With Duplicates Allowed	3176
520	Find a Fixed Point in a Given Array	3176
521	Scramble String LeetCode Solution	3174
522	Analyze User Website Visit Pattern LeetCode Solution	3170
523	Count subarrays having total distinct elements same as original array	3169
524	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3168
525	Subset sum problem	3168
526	Detect a loop in the Linked List	3161
527	Perfect Squares LeetCode Solution	3154
528	Fibonacci numbers	3153
529	Count Submatrices With All Ones LeetCode Solution	3145
530	Queue based approach for first non-repeating character in a stream	3138
531	Group Anagrams	3134
532	Implement Trie (Prefix Tree) Leetcode Solution	3133
533	Number of Distinct Islands Leetcode Solution	3131
534	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3126
535	Reorder Data in Log Files LeetCode Solution	3125
536	Path Crossing Leetcode Solution	3121
537	Monotonic Array Leetcode Solution	3117
538	Valid Boomerang Leetcode Solution	3115
539	Generate all Binary Strings from Given Pattern	3114
540	Find the Lost Element From a Duplicated Array	3108
541	Champagne Tower LeetCode Solution	3105
542	Longest Common Prefix using Divide and Conquer	3103
543	Insert Node in the Sorted Linked List	3102
544	Maximum Sum of Non Consecutive Elements	3095
545	Construction of Longest Increasing Subsequence (N log N)	3087
546	Minimum Height Trees	3087
547	How to Create Mergable Stack?	3085
548	Merge Overlapping Intervals	3079
549	Nearest Exit from Entrance in Maze LeetCode Solution	3074
550	Sort a stack using recursion	3072
551	Race Car LeetCode Solution	3068
552	Decode Ways	3067
553	Find if an Expression has Duplicate Parenthesis or Not	3067
554	Shifting Letters LeetCode Solution	3066
555	Palindrome Permutation LeetCode Solution	3065
556	Build an Array With Stack Operations Leetcode Solution	3061
557	Count Possible Triangles	3057
558	First missing positive	3053
559	Recover Binary Search Tree	3052
560	Find a Sorted Subsequence of size 3	3048
561	Find maximum length Snake sequence	3047
562	Decode String	3047
563	Binary Tree zigzag level order Traversal	3046
564	Merge Two Binary Trees LeetCode Solution	3043
565	Smallest Good Base	3043
566	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3040
567	Sliding Window Maximum	3036
568	LCS (Longest Common Subsequence) of three strings	3034
569	Most Stones Removed with Same Row or Column LeetCode Solution	3031
570	Minimum Bracket Reversals	3028
571	Number of Equivalent Domino Pairs Leetcode Solution	3026
572	Print all Palindromic Partitions of a String	3026
573	Letter Case Permutation	3020
574	Morris Traversal	3018
575	Rectangle Overlap LeetCode Solution	3015
576	Minimum Height Trees LeetCode Solution	3011
577	Maximum Element in an Array which is Increasing and then Decreasing	3009
578	Largest Subarray with Equal Number of 0’s and 1’s	3007
579	Palindrome Partitioning Leetcode Solution	3005
580	Recover Binary Search Tree Leetcode Solution	3003
581	Implement strStr() LeetCode Solution	3000
582	Distance Between Bus Stops Leetcode Solution	3000
583	Minimum number of jumps to reach end	2996
584	Maximum Number of Ways to Partition an Array LeetCode Solution	2993
585	Longest Substring with At Least K Repeating Characters LeetCode Solution	2993
586	Guess Number Higher or Lower II	2982
587	Maximum Length of Chain Pairs	2980
588	Design a Stack With Increment Operation Leetcode Solution	2979
589	K-th Distinct Element in an Array	2979
590	Find the Town Judge LeetCode Solution	2978
591	Reorder an Array According to the Given Indexes	2978
592	Longest Repeated Subsequence	2977
593	Best Time to Buy and Sell Stock IV LeetCode Solution	2966
594	Contiguous Array LeetCode Solution	2964
595	Implement Two Stacks in an Array	2959
596	Maximum Depth of N-ary Tree Leetcode Solution	2957
597	Mean of Array After Removing Some Elements Leetcode Solution	2949
598	Design Skiplist LeetCode Solution	2942
599	Jump Game IV LeetCode Solution	2941
600	Find the two Numbers with Odd Occurrences in an Unsorted Array	2940
601	All Possible Full Binary Trees LeetCode Solution	2938
602	Maximize Elements Using Another Array	2938
603	Subarrays with K Different Integers Leetcode Solution	2937
604	The Maze III LeetCode Solution	2937
605	Check for Balanced Parentheses in an Expression	2936
606	Valid Parentheses Leetcode Solution	2935
607	Rearrange Spaces Between Words Leetcode Solution	2931
608	Sort a String According to Another String	2928
609	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2925
610	Maximum sum rectangle in a 2D matrix	2914
611	Contains Duplicate	2913
612	Minimum Jumps to Reach Home LeetCode Solution	2899
613	Boolean Parenthesization Problem	2887
614	Word Break	2880
615	Convert BST to Min Heap	2878
616	Palindrome Permutations of a String	2878
617	Count pair with Given Sum	2877
618	Perform String Shifts Leetcode	2875
619	Iterative Method to find Height of Binary Tree	2872
620	Valid Sudoku	2864
621	Maximum Score After Splitting a String Leetcode Solution	2862
622	Possible Bipartition LeetCode Solution	2857
623	Edit Distance LeetCode Solution	2855
624	Find the Minimum Element in a Sorted and Rotated Array	2854
625	Find the First Circular Tour that visits all the Petrol Pumps	2843
626	Maximum Product of Splitted Binary Tree LeetCode Solution	2842
627	A Space Optimized DP solution for 0-1 Knapsack Problem	2840
628	Reach a Number LeetCode Solution	2833
629	Best Meeting Point LeetCode Solution	2822
630	Number of palindromic paths in a matrix	2818
631	Merge Two Balanced Binary Search Trees	2816
632	Find Largest Value in Each Tree Row LeetCode Solution	2805
633	Find the Subarray of given length with Least Average	2804
634	Segregate 0s and 1s in an Array	2802
635	Sorted Linked List to Balanced BST	2800
636	Merge Overlapping Intervals II	2800
637	Count Sub Islands LeetCode Solution	2793
638	Brick Wall LeetCode Solution	2792
639	Check if the given array can represent Level Order Traversal of Binary Search Tree	2791
640	My Calendar I LeetCode Solution	2790
641	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2785
642	Swapping Nodes in a Linked List Leetcode Solution	2783
643	Caesar Cipher	2783
644	Heap Sort	2781
645	Level order Traversal in Spiral Form	2775
646	Palindromic Substrings Leetcode Solution	2767
647	Find Median from data Stream	2761
648	Construct BST from given Preorder Traversal	2758
649	Merge K Sorted Arrays and Print Sorted Output	2753
650	Palindrome Permutation	2751
651	Pair with given product	2750
652	All Unique Triplets that Sum up to a Given Value	2749
653	Word Pattern	2744
654	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2736
655	Maximize Sum of Array after K Negations Leetcode Solution	2727
656	Find all triplets with zero sum	2727
657	Find First and Last Position of Element in Sorted Array LeetCode Solution	2726
658	Print Fibonacci sequence using 2 variables	2716
659	Find whether a subarray is in form of a mountain or not	2715
660	Validate Binary Search Tree	2715
661	Maximum Frequency Stack Leetcode Solution	2705
662	Find all pairs (a, b) in an array such that a % b = k	2704
663	Huffman Coding	2701
664	Count Distinct Elements in Every Window of Size K	2699
665	Bubble sort using two Stacks	2694
666	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2694
667	Convert Sorted List to Binary Search Tree	2691
668	Queries on Probability of Even or Odd Number in given Ranges	2687
669	Minimum time required to rot all oranges	2686
670	Add two numbers	2685
671	Partition Problem	2685
672	Isomorphic Strings LeetCode Solution	2682
673	Counting Bits	2680
674	Longest Subarray Having Count of 1s One More than Count of 0s	2679
675	Find four elements that sum to a given value (Hashmap)	2677
676	Length of Longest Fibonacci Subsequence	2673
677	How to Efficiently Implement k Stacks in a Single Array?	2671
678	Split Array Into Consecutive Subsequences	2670
679	Sort 0s 1s and 2s in an Array	2670
680	Largest Sum Contiguous Subarray	2669
681	Binary Tree Right Side View LeetCode Solution	2666
682	Detect Capital Leetcode Solution	2662
683	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2656
684	Rotate Array	2645
685	Range Sum Query 2D – Immutable LeetCode Solution	2644
686	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2642
687	Print all subarrays with 0 sum	2637
688	Remove brackets from an algebraic string containing + and – operators	2637
689	Count Good Nodes in Binary Tree LeetCode Solution	2636
690	Minimum Swaps to Group All 1’s Together Leetcode Solution	2636
691	Populating Next Right Pointers in Each Node Leetcode Solution	2633
692	Remove Palindromic Subsequences Leetcode Solution	2633
693	Partition to K Equal Sum Subsets Leetcode Solution	2630
694	Count ways to reach the nth stair using step 1, 2 or 3	2626
695	Populating Next Right Pointers in Each Node	2623
696	Binary Tree to Binary Search Tree Conversion	2621
697	Merge Two Sorted Lists Leetcode	2620
698	String comparison containing wildcards	2616
699	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2608
700	Find pairs with given sum such that elements of pair are in different rows	2608
701	Arithmetic Slices II – Subsequence LeetCode Solution	2605
702	Maximum Number of Chocolates to be Distributed Equally Among k Students	2587
703	Minimum Sum Path in a Triangle	2583
704	Happy Number	2581
705	Alien Dictionary	2572
706	Check if a Linked list of Strings form a Palindrome	2570
707	Concatenation of Array LeetCode Solution	2569
708	Queue Reconstruction by Height	2569
709	Web Crawler LeetCode Solution	2567
710	Inorder Successor of a node in Binary Tree	2563
711	Partition Equal Subset Sum	2563
712	Find Duplicate Subtrees	2558
713	Topological Sorting	2550
714	Contiguous Array Leetcode	2549
715	Difference Array \| Range update query in O(1)	2547
716	Breadth First Search (BFS) for a Graph	2545
717	Find All Pairs With a Given Difference	2542
718	Swap Kth Node from beginning with Kth Node from End	2541
719	Increasing Subsequence of Length three with Maximum Product	2540
720	Check if String Follows Order of Characters by a Pattern or not	2533
721	Root to Leaf path with target sum Leetcode Solutions	2524
722	Remove duplicates from sorted array	2517
723	Longest Common Prefix Using Binary Search II	2517
724	Reverse Nodes in K-Group	2513
725	Elements Appear more than N/K times in Array	2509
726	Maximum Product Subarray II	2507
727	Maximum Distance in Array	2499
728	Container with Most Water	2494
729	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2493
730	Minimum Swaps to Make Strings Equal Leetcode Solution	2491
731	Climbing stairs	2488
732	Count Minimum Steps to Get the given Array	2480
733	Sum Root to Leaf Numbers LeetCode Solution	2478
734	An Interesting Method to generate Binary Numbers from 1 to n	2471
735	Parallel Courses II LeetCode Solution	2470
736	Substring With Concatenation Of All Words	2468
737	Finding K closest element	2467
738	Check if all levels of two Binary Tree are anagrams or not	2464
739	Symmetric Tree	2463
740	Pancake Sorting	2461
741	Delete Nodes and Return Forest Leetcode Solution	2458
742	Longest Increasing Subsequence	2457
743	Deletion in a Binary Tree	2454
744	Score of Parenthesis LeetCode Solution	2451
745	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2450
746	Delete Nth node from the end of the given linked list	2448
747	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2443
748	Given a binary tree, how do you remove all the half nodes?	2443
749	Boundary Traversal of binary tree	2437
750	Iterative Depth First Traversal of Graph	2435
751	Find the first repeating element in an array of integers	2434
752	MiniMax Algorithm	2433
753	Linked List Cycle	2426
754	Sort Array by Increasing Frequency Leetcode Solution	2425
755	Merge K Sorted Linked Lists	2425
756	Union and Intersection of two Linked Lists	2422
757	Non-overlapping sum of two sets	2422
758	Find K Closest Elements LeetCode Solution	2419
759	Kill Process LeetCode Solution	2417
760	Longest Common Prefix Word by Word Matching	2416
761	Minimum Size Subarray Sum	2414
762	Count pairs from two linked lists whose sum is equal to a given value	2413
763	Iterative Preorder Traversal	2408
764	Construct Binary Tree from given Parent Array representation	2407
765	New 21 Game	2402
766	Rearrange an Array Such that arr[i] is equal to i	2400
767	Find Maximum of Minimum for Every Window Size in a Given Array	2400
768	Level of Each node in a Tree from source node	2399
769	Verify Preorder Serialization of a Binary Tree	2398
770	Minimum Remove to Make Valid Parentheses LeetCode Solution	2393
771	Level order traversal using two Queues	2388
772	Check if a queue can be sorted into another queue using a stack	2384
773	Nested List Weight Sum II LeetCode Solution	2383
774	BFS vs DFS for Binary Tree	2377
775	Reservoir Sampling	2373
776	Merging Intervals	2371
777	Find the Difference Leetcode Solution	2369
778	Valid Anagrams	2361
779	Maximum Product Subarray	2360
780	Maximum size subarray sum equals k	2359
781	Matrix Chain Multiplication	2356
782	Range LCM Queries	2354
783	Remove Duplicates from Sorted List II	2351
784	Reorder Array Using Given Indexes	2349
785	Flatten Binary Tree to Linked List LeetCode Solution	2348
786	Palindrome Partitioning	2347
787	Smallest Range II Leetcode Solution	2344
788	Print a Binary Tree in Vertical Order	2342
789	K maximum sums of overlapping contiguous sub-arrays	2338
790	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2336
791	Super Ugly Number	2333
792	Vertical sum in a given binary tree	2332
793	Defanging an IP Address LeetCode Solution	2325
794	Friends Of Appropriate Ages LeetCode Solution	2319
795	Valid Triangle Number LeetCode Solution	2308
796	Balanced Binary Tree	2308
797	Check if Two Expressions With Brackets are Same	2307
798	Maximum difference between two elements such as larger element comes after smaller	2304
799	Missing Number	2298
800	Check if any two intervals overlap among a given set of intervals	2297
801	The Painter’s Partition Problem	2297
802	Minimum Distance Between BST Nodes Leetcode Solution	2294
803	Flatten 2D Vector LeetCode Solution	2292
804	Find subarray with given sum (Handles Negative Numbers)	2292
805	Create Maximum Number	2292
806	Number Of Longest Increasing Subsequence	2291
807	Largest Submatrix With Rearrangements LeetCode Solution	2288
808	Find Three Element From Different Three Arrays Such That a + b + c = sum	2284
809	Employee Importance LeetCode Solution	2283
810	Find Maximum Sum Possible Equal Sum of Three Stacks	2281
811	Find K Length Subarray of Maximum Average	2281
812	Check if a given array can represent Preorder Traversal of Binary Search Tree	2279
813	Lowest Common Ancestor	2279
814	Count number of triplets with product equal to given number	2276
815	Unique Binary Search Trees LeetCode Solution	2273
816	Check if two nodes are on the same path in a Tree	2259
817	Find Peak Element	2259
818	Peak Index in a Mountain Array LeetCode Solution	2257
819	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2257
820	Closest Leaf in a Binary Tree LeetCode Solution	2256
821	Minimum insertions to form a palindrome with permutations allowed	2251
822	Array Nesting Leetcode Solution	2250
823	Valid Triangle Number LeetCode Solution	2245
824	Third Maximum Number Leetcode Solution	2241
825	Maximum subsequence sum such that no three are consecutive	2241
826	Find distance between two nodes of a Binary Tree	2241
827	Find Common Characters Leetcode Solution	2238
828	Find Smallest Range Containing Elements from k Lists	2236
829	Hamming Distance	2236
830	Check Completeness of a Binary Tree LeetCode Solution	2235
831	Largest BST Subtree LeetCode Solution	2234
832	Iterative Postorder Traversal Using Two Stacks	2229
833	Distinct Subsequences	2226
834	Print all triplets in sorted array that form AP	2224
835	First Bad Version	2224
836	Find Sum of all unique sub-array sum for a given array	2222
837	Print All Distinct Elements of a Given Integer Array	2219
838	Products of ranges in an array	2218
839	Sorting a K Sorted Array	2218
840	Newman-Conway Sequence	2216
841	Arrange given numbers to form the biggest number	2214
842	Sort Elements by Frequency II	2213
843	Merging Two Sorted Arrays	2213
844	Valid Parenthesis String	2212
845	Maximum number of segments of lengths a, b and c	2209
846	Largest divisible pairs subset	2208
847	Find Element Using Binary Search in Sorted Array	2207
848	Number of siblings of a given Node in n-ary Tree	2204
849	Tree Traversal (Preorder, Inorder & Postorder)	2202
850	Bottom View of a Binary Tree	2197
851	Longest Palindromic Subsequence	2196
852	Path Sum	2190
853	Stone Game IV LeetCode Solution	2177
854	Find the largest multiple of 3	2177
855	Lower Case To Upper Case	2176
856	Largest subarray with equal number of 0s and 1s	2171
857	Diagonal Traversal of Binary Tree	2168
858	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2165
859	Print Right View of a Binary Tree	2164
860	Four Elements that Sum to Given	2164
861	Merge Two Sorted Arrays	2161
862	Contiguous Array	2160
863	Binary array after M range toggle operations	2157
864	Range Sum Query using Sparse Table	2156
865	Count and Say	2156
866	Stone Game IV LeetCode Solution	2155
867	Shuffle an Array	2155
868	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2152
869	Segment Tree	2151
870	Subset Sum Problem in O(sum) space	2142
871	Median of Two Sorted Arrays	2142
872	Unique Binary Search Trees	2138
873	Isomorphic Strings	2138
874	Permutations of a Given String Using STL	2136
875	Encoded String With Shortest Length LeetCode Solution	2132
876	Find Largest d in Array such that a + b + c = d	2131
877	Longest Bitonic Subsequence	2130
878	Averages of Levels in Binary Tree	2125
879	Find Nth Node	2119
880	Next Greater Element in an Array	2117
881	Red-Black Tree Introduction	2112
882	Maximum Sum of 3 Non-Overlapping Subarrays	2112
883	Valid Number	2112
884	Infix to Postfix	2111
885	Closest Binary Search Tree Value Leetcode Solution	2104
886	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2104
887	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2103
888	Height of a generic tree from parent array	2098
889	Maximum Product Subarray	2098
890	Find unique character in a string	2098
891	Friends Pairing Problem	2095
892	Transform a BST to Greater sum Tree	2093
893	Count Primes in Ranges	2088
894	Orderly Queue LeetCode Solution	2087
895	Trapping Rain Water II LeetCode Solution	2075
896	Maximum Population Year LeetCode Solution	2074
897	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2071
898	Valid Perfect Square LeetCode Solution	2067
899	Binary Tree Longest Consecutive Sequence LeetCode Solution	2063
900	Bold Words in String LeetCode Solution	2062
901	Write a function to get the intersection point of two Linked Lists	2057
902	Serialize and Deserialize Binary Tree	2052
903	Binary Search Tree Delete Operation	2050
904	Range Minimum Query (Square Root Decomposition and Sparse Table)	2049
905	Minimum sum of squares of character counts in a given string after removing k characters	2049
906	Shuffle a given Array	2043
907	Sentence Screen Fitting LeetCode Solution	2040
908	Insert Delete GetRandom	2034
909	The Number of Weak Characters in the Game LeetCode Solution	2031
910	Kth Smallest Number in Multiplication Table Leetcode Solution	2031
911	Diameter of N-Ary Tree LeetCode Solution	2029
912	Swap Nodes In Pairs	2025
913	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2024
914	Next greater element	2019
915	Convert BST into a Min-Heap without using array	2016
916	Lowest Common Ancestor in Binary Search Tree	2009
917	Reorganize String	2009
918	K’th Largest Element in BST when modification to BST is not allowed	2005
919	Integer to Roman	1997
920	Maximum Product Subarray	1991
921	Find Minimum In Rotated Sorted Array	1990
922	Edit Distance	1981
923	Array Queries for multiply replacements and product	1979
924	Advantages of BST over Hash Table	1978
925	Next Greater Element II LeetCode Solution	1977
926	Total Hamming Distance LeetCode Solution	1971
927	Queries on XOR of greatest odd divisor of the range	1964
928	Constant time range add operation on an array	1961
929	Koko Eating Bananas LeetCode Solution	1960
930	Check if an Array is Stack Sortable	1956
931	Serialize and Deserialize Binary Tree LeetCode Solution	1950
932	Longest Increasing Consecutive Subsequence	1950
933	Find the smallest binary digit multiple of given number	1948
934	Best Meeting Point LeetCode Solution	1945
935	Print n terms of Newman-Conway Sequence	1943
936	Maximum Sum Increasing Subsequence	1943
937	Level Order Traversal of Binary Tree	1942
938	Clone a Binary Tree with Random Pointers	1939
939	Power of Two	1937
940	K’th Largest element in BST using constant extra space	1933
941	Moving Stones Until Consecutive Leetcode Solution	1930
942	Image Overlap LeetCode Solution	1928
943	Reverse a Path in BST using Queue	1924
944	Numbers with prime frequencies greater than or equal to k	1923
945	Range Queries for Longest Correct Bracket Subsequence	1921
946	Design Underground System Leetcode Solution	1920
947	Write Code to Determine if Two Trees are Identical	1919
948	Number of Orders in the Backlog Leetcode Solution	1918
949	Count and Toggle Queries on a Binary Array	1911
950	Greatest Sum Divisible by Three LeetCode Solution	1910
951	Valid Tic-Tac-Toe State LeetCode Solution	1910
952	Check if X can give change to every person in the Queue	1907
953	A program to check if a binary tree is BST or not	1905
954	Print Next Greater Number of Q queries	1901
955	Find the node with minimum value in a Binary Search Tree	1900
956	Design Add and Search Words Data Structure LeetCode Solution	1896
957	Insert into a Sorted Circular Linked List LeetCode Solution	1892
958	Find minimum number of merge operations to make an array palindrome	1891
959	Closest Binary Search Tree Value II LeetCode Solution	1888
960	Form minimum number from given sequence	1888
961	Check for Palindrome after every character replacement Query	1887
962	Factorial Trailing Zeroes LeetCode Solution	1885
963	Check if each internal node of a BST has exactly one child	1885
964	Count the Pairs at Same Distance as in English Alphabets	1881
965	Merge two BSTs with limited extra space	1879
966	Number of elements less than or equal to a given number in a given subarray	1878
967	Maximum Array from Two given Arrays Keeping Order Same	1876
968	Queries for Decimal Values of Subarrays of a Binary Array	1874
969	Largest Plus Sign Leetcode Solution	1870
970	Collect maximum points in a grid using two traversals	1864
971	Merge Sort	1864
972	Maximum difference between first and last indexes of an element in array	1854
973	Dividing Array into Pairs With Sum Divisible by K	1853
974	Group Shifted Strings Leetcode Solution	1846
975	Priority Queue	1835
976	Merge Sorted Array	1833
977	Longest Substring Without Repeating Characters Leetcode Solution	1828
978	Print modified array after multiple array range increment operations	1825
979	Count even length binary sequences with same sum of first and second half bits	1824
980	Graph Cloning	1817
981	Cutting a Rod	1808
982	Print Ancestors of a Given Binary Tree Node Without Recursion	1800
983	Form Minimum Number From Given Sequence	1794
984	Swim in Rising Water LeetCode Solution	1785
985	Find maximum average subarray of k length	1785
986	Kth Smallest Element in a BST	1785
987	Count Pairs Whose Products Exist in Array	1783
988	Excel Sheet Column Number LeetCode Solution	1779
989	Minimum Moves to Equal Array Elements LeetCode Solution	1777
990	Unique Paths II	1767
991	Excel Sheet Column Title LeetCode Solution	1763
992	Binary Search Tree	1762
993	Guess The Word	1761
994	Decrease Elements To Make Array Zigzag LeetCode Solution	1757
995	Palindrome Partitioning	1756
996	Print all Possible Ways to Break a String in Bracket Form	1754
997	K Empty Slots	1753
998	Check given array of size n can represent BST of n levels or not	1749
999	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1748
1000	Binary Search Tree Search and Insertion	1747
1001	Longest Common Prefix using Character by Character Matching	1745
1002	Regular Expression Matching	1740
1003	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1736
1004	Sorted Array to Balanced BST	1731
1005	How to print maximum number of A’s using given four keys	1727
1006	Sum of Left Leaves LeetCode Solution	1712
1007	Find postorder traversal of BST from preorder traversal	1702
1008	Maximum weight transformation of a given string	1682
1009	Construct Complete Binary Tree from its Linked List Representation	1682
1010	Queries for Number of Distinct Elements in a Subarray	1672
1011	Find the Town Judge LeetCode Solution	1653
1012	Iterative method to find ancestors of a given binary tree	1649
1013	Symmetric Tree LeetCode Solution Leetcode Solution	1648
1014	Maximum Depth Of Binary Tree	1648
1015	Binary Tree to Binary Search Tree Conversion using STL set	1640
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1639
1017	Random Pick Index LeetCode Solution	1626
1018	Data Structure Designing	1623
1019	Search in Sorted Rotated Array	1614
1020	Find Maximum Depth of Nested Parenthesis in a String	1595
1021	Search an Element in Sorted Rotated Array	1577
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1554
1023	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1547
1024	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1542
1025	Next Greater Element I Leetcode Solution	1500
1026	Maximum Binary Tree	1486
1027	Print Maximum Length Chain of Pairs	1476
1028	Flatten Binary Tree to Linked List LeetCode Solution	1462
1029	Find k-th smallest element in BST (Order Statistics in BST)	1447
1030	Peeking Iterator LeetCode Solution	1423
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1410