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	42379
2	Maximum occurring character in a string	19339
3	Plus One Leetcode Solution	18612
4	Valid Parentheses LeetCode Solution	18556
5	3Sum Leetcode Solution	16521
6	First Repeating Element	14748
7	Single Number Leetcode Solution	14477
8	Merge Sorted Arrays Leetcode Solution	14418
9	Count Primes Leetcode Solutions	14046
10	Pow(x, n) Leetcode Solution	13713
11	Sqrt(x) Leetcode Solution	13514
12	Meeting Rooms II LeetCode Solution	12685
13	Concatenation of Array LeetCode Solution	12353
14	Roman to Integer Leetcode Solution	11566
15	Search Insert Position Leetcode Solution	11360
16	Valid Palindrome Leetcode Solution	11350
17	Contains Duplicate II Leetcode Solution	11327
18	Palindrome Number LeetCode Solution	11199
19	Reverse Vowels of a String Leetcode Solution	10794
20	Jump Game Leetcode Solution	10769
21	Intersection of Two Arrays II Leetcode Solution	10646
22	Number of Good Pairs Leetcode Solution	10552
23	Remove Duplicates from Sorted Array Leetcode Solution	10493
24	Spiral Matrix LeetCode Solution	10449
25	Longest Substring Without Repeating Characters LeetCode Solution	10421
26	Kids With the Greatest Number of Candies Leetcode Solution	10396
27	House Robber Leetcode Solution	10331
28	Add Binary Leetcode Solution	10224
29	Maximum Subarray Leetcode Solution	9869
30	Find the Maximum Repeating Number in Array	9707
31	Number Of 1 bits	9556
32	Text Justification LeetCode Solution	9544
33	Jewels and Stones Leetcode Solution	9399
34	Power of Two Leetcode Solution	9248
35	Move Zeroes LeetCode Solution	9239
36	Longest Palindromic Substring LeetCode Solution	9237
37	Min Stack Leetcode Solution	9212
38	Permutations Leetcode Solution	9093
39	Shuffle String Leetcode Solution	8979
40	Word Search Leetcode Solution	8874
41	Third Maximum Number Leetcode Solution	8865
42	Find All Numbers Disappeared in an Array Leetcode Solution	8863
43	Next Permutation Leetcode Solution	8842
44	Daily Temperatures Leetcode Solution	8824
45	Median of Two Sorted Arrays LeetCode Solution	8756
46	Number of Islands LeetCode Solution	8708
47	Search in Rotated Sorted Array Leetcode Solution	8657
48	Kth Missing Positive Number Leetcode Solution	8640
49	Maximum Profit in Job Scheduling Leetcode Solution	8622
50	Longest Common Prefix Leetcode Solution	8589
51	Next Greater Element I Leetcode Solution	8553
52	Evaluation of Postfix Expression	8483
53	Frog Jump Leetcode Solution	8470
54	Find Minimum Distance Between Two Numbers in an Array	8331
55	Running Sum of 1d Array Leetcode Solution	8236
56	Rotate Image LeetCode Solution	8176
57	Multiply Strings Leetcode Solution	8159
58	Valid Anagram Leetcode Solution	8148
59	Combination Sum Leetcode Solution	8112
60	Can Place Flowers LeetCode Solution	8102
61	Shuffle the Array Leetcode Solution	8096
62	3Sum Closest LeetCode Solution	8058
63	Bulb Switcher LeetCode Solution	8048
64	House Robber II Leetcode Solution	8030
65	Count and Say Leetcode Solution	8008
66	Excel Sheet Column Title Leetcode Solution	7774
67	Koko Eating Bananas Leetcode Solution	7745
68	Isomorphic Strings Leetcode Solution	7739
69	Subarray and Subsequence	7733
70	Happy Number Leetcode Solution	7710
71	Count Pairs With Given Sum	7637
72	Missing Number Leetcode Solution	7630
73	Product of array except self	7628
74	Integer to Roman Leetcode Solution	7618
75	Majority Element Leetcode Solution	7591
76	Strobogrammatic Number LeetCode Solution	7568
77	Best Time to Buy and Sell Stock LeetCode Solution	7516
78	Rotate String LeetCode Solution	7511
79	Reverse String Without Temporary Variable	7490
80	Candy LeetCode Solution	7417
81	Find the Difference Leetcode Solution	7356
82	Is Subsequence Leetcode Solution	7350
83	Largest Number Leetcode Solution	7236
84	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7231
85	Find Common Characters Leetcode Solution	7230
86	String to Integer (atoi) LeetCode Solution	7161
87	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7153
88	Find the Duplicate Number LeetCode Solution	7144
89	Binary Search LeetCode Solution	7105
90	Expression Evaluation	7102
91	A Product Array Puzzle	7092
92	Set Matrix Zeroes	7076
93	Summary Ranges Leetcode Solution	7022
94	Subset Leetcode	7008
95	Sort Characters By Frequency LeetCode Solution	6925
96	Find the Town Judge Leetcode Solution	6922
97	Word Pattern LeetCode Solution	6898
98	Rabin Karp Algorithm	6896
99	Balanced Binary Tree Leetcode Solution	6893
100	Unique Paths Leetcode Solution	6845
101	Arranging Coins Leetcode Solution	6807
102	Find the Winner of the Circular Game LeetCode Solution	6785
103	String Compression LeetCode Solution	6751
104	Rearrange Positive and Negative Numbers Alternatively in Array	6728
105	Repeated Substring Pattern LeetCode Solution	6664
106	Asteroid Collision LeetCode Solution	6633
107	Smallest window in a string containing all characters of another string	6622
108	Group Anagrams LeetCode Solution	6602
109	Sort Colors LeetCode Solution	6583
110	Best Time to Buy and Sell Stock II Leetcode Solution	6449
111	Sort Array By Parity LeetCode Solution	6447
112	Page Replacement Algorithms in Operating Systems	6423
113	Zigzag Conversion LeetCode Solution	6400
114	Postfix to Infix Conversion	6396
115	Divide Two Integers Leetcode Solution	6340
116	Valid Palindrome II Leetcode Solution	6333
117	Sum of minimum and maximum elements of all subarrays of size k	6331
118	Matrix Chain Multiplication using Dynamic Programming	6315
119	Generate Parentheses Leetcode Solution	6253
120	Product of Array Except Self LeetCode Solution	6253
121	Kth largest element in an Array Leetcode Solutions	6238
122	Reverse Integer Leetcode Solution	6229
123	Assign Cookies Leetcode Solution	6220
124	Remove Duplicates from Sorted Array II Leetcode Solution	6170
125	Bus Routes Leetcode Solution	6125
126	Merge Two Sorted Lists Leetcode Solutions	6124
127	Pascal Triangle Leetcode	6120
128	Number of Provinces Leetcode Solution	6114
129	Length of Last Word Leetcode Solution	6094
130	H-Index Leetcode Solution	6084
131	Linked List Cycle II LeetCode Solution	6064
132	Decode String Leetcode Solution	6060
133	Convert array into Zig-Zag fashion	6013
134	Minimum Steps to reach target by a Knight	6007
135	Defanging an IP Address Leetcode Solution	5994
136	Optimal Account Balancing LeetCode Solution	5971
137	Employee Free Time LeetCode Solution	5967
138	Minimum Cost For Tickets Leetcode Solution	5922
139	First element occurring k times in an array	5887
140	Find the Row with Maximum Number of 1’s	5856
141	Build Array From Permutation Leetcode Solution	5842
142	Pascal’s Triangle II Leetcode Solution	5840
143	Prefix to Infix Conversion	5820
144	Find First and Last Position of Element in Sorted Array Leetcode Solution	5772
145	Increasing Triplet Subsequence LeetCode Solution	5768
146	Implementation of Deque using Doubly Linked List	5759
147	Island Perimeter Leetcode Solution	5713
148	Robot Room Cleaner Leetcode Solution	5707
149	Majority Element II Leetcode Solution	5672
150	Bellman Ford Algorithm	5648
151	Max Consecutive Ones Leetcode Solution	5646
152	Find Pair with Given Difference	5642
153	K-th Smallest Element in a Sorted Matrix	5629
154	Merge Sorted Array LeetCode Solution	5625
155	Swap Nodes in Pairs Leetcode Solutions	5621
156	Check if the Elements of an Array are Consecutive	5604
157	Fibonacci Number LeetCode Solution	5584
158	Guess Number Higher or Lower LeetCode Solution	5549
159	Design Parking System Leetcode Solution	5546
160	KMP Algorithm	5540
161	Find the Missing Number	5539
162	First negative integer in every window of size k	5508
163	Add Two Numbers II Leetcode Solution	5497
164	Delete middle element of a stack	5488
165	OSI Model	5485
166	Coin Change 2 Leetcode Solution	5470
167	Lemonade Change Leetcode Solution	5466
168	Subarray Sum Equals K LeetCode Solution	5462
169	Length of the largest subarray with contiguous elements	5457
170	Subarray Product Less Than K LeetCode Solution	5443
171	First Unique Character in a String LeetCode Solution	5438
172	String Compression	5435
173	Trapping Rain Water Leetcode Solution	5429
174	Capacity To Ship Packages Within D Days Leetcode Solution	5403
175	Last Stone Weight	5402
176	Set Matrix Zeroes Leetcode Solution	5401
177	Word Ladder LeetCode Solution	5378
178	Subarray with Given Sum	5373
179	Find All Duplicates in an Array LeetCode Solution	5369
180	Palindrome Linked List Leetcode Solution	5367
181	Monotonic Array LeetCode Solution	5365
182	Find Smallest Missing Number in a Sorted Array	5350
183	Form Minimum Number from Given Sequence of D’s and I’s	5334
184	Repeated Substring Pattern	5326
185	Combinations Leetcode Solution	5283
186	Remove Duplicates from Sorted List II LeetCode Solution	5263
187	Reverse Words in a String III LeetCode Solution	5238
188	01 Matrix LeetCode Solution	5233
189	Same Tree LeetCode Solution	5224
190	Iterative Implementation of Quick Sort	5211
191	Valid Perfect Square Leetcode Solution	5210
192	Continuous Subarray Sum LeetCode Solution	5198
193	Single Element in a Sorted Array LeetCode Solution	5178
194	Break a Palindrome LeetCode Solution	5128
195	Remove Linked List Elements Leetcode Solution	5125
196	Prefix to Postfix Conversion	5118
197	Backspace String Compare	5114
198	Slowest Key Leetcode Solution	5110
199	Merge k Sorted Lists Leetcode Solution	5090
200	Combination Sum	5087
201	Relative Ranks Leetcode Solution	5056
202	Leetcode Permutations	5050
203	The K Weakest Rows in a Matrix Leetcode Solution	5013
204	Rotate List Leetcode Solution	5004
205	Find the Duplicate Element	5002
206	Maximum Product of Three Numbers LeetCode Solution	4989
207	Find Peak Element LeetCode Solution	4957
208	Second Most Repeated Word in a Sequence	4950
209	Insert Delete GetRandom O(1) Leetcode Solution	4939
210	Top K Frequent Elements LeetCode Solution	4930
211	Printing brackets in Matrix Chain Multiplication Problem	4929
212	Longest Common Subsequence LeetCode Solution	4928
213	Kth Largest Element in a Stream Leetcode Solution	4899
214	Palindrome Number	4882
215	Cuckoo sequence program	4877
216	Make The String Great Leetcode Solution	4857
217	Remove All Occurrences of a Substring LeetCode Solution	4856
218	Rearrange given Array in Maximum Minimum Form	4853
219	Container With Most Water LeetCode Solution	4848
220	Relative Sort Array Leetcode Solution	4838
221	Subarray Sum Equals k	4836
222	Convert a Number to Hexadecimal Leetcode Solution	4830
223	Max Area of Island	4826
224	Unique Paths II Leetcode Solution	4816
225	Delete Node in a Linked List Leetcode Solution	4797
226	Find Leaders in an Array	4793
227	Permutation in String Leetcode Solution	4790
228	Check If Two String Arrays are Equivalent Leetcode Solution	4780
229	Target Sum	4779
230	Generate all Binary Strings Without Consecutive 1’s	4776
231	Contains Duplicate LeetCode Solution	4774
232	Time Based Key-Value Store LeetCode Solution	4748
233	N-Queens LeetCode Solution	4743
234	Moving Average from Data Stream Leetcode Solution	4741
235	Arithmetic Expression Evaluation	4727
236	Given two unsorted arrays find all pairs whose sum is x	4703
237	Count Good Nodes in Binary Tree Leetcode Solution	4697
238	Find N Unique Integers Sum up to Zero Leetcode Solution	4693
239	Scramble String	4690
240	Letter Combinations of a Phone Number	4675
241	Number of Dice Rolls With Target Sum LeetCode Solution	4669
242	LRU Cache LeetCode Solution	4654
243	Next Permutation	4652
244	Construct Binary Tree from Given Inorder and Preorder Traversals	4631
245	Find Triplet in Array With a Given Sum	4623
246	Flipping an Image LeetCode Solution	4608
247	Stone Game LeetCode	4608
248	Minimum swaps required to bring all elements less than or equal to k together	4589
249	Number of Steps to Reduce a Number to Zero Leetcode Solution	4585
250	Check If N and Its Double Exist Leetcode Solution	4581
251	Reverse Only Letters LeetCode Solution	4577
252	Min Cost Climbing Stairs LeetCode Solution	4568
253	Remove Minimum Characters so that Two Strings Become Anagrams	4567
254	Prim’s Algorithm	4558
255	Find The Duplicate Number	4539
256	Stock Buy Sell to Maximize Profit	4538
257	Minimum Knight Moves LeetCode Solution	4532
258	Student Attendance Record I Leetcode Solution	4529
259	To Lower Case Leetcode Solution	4501
260	Top K Frequent Elements	4486
261	Minimum Operations to convert X to Y	4475
262	The kth Factor of n Leetcode Solution	4464
263	Smallest Positive Number Missing in an Unsorted Array	4455
264	License Key Formatting Leetcode Solution	4440
265	Reverse words in a string	4422
266	Maximum Subarray Sum using Divide and Conquer	4414
267	Min Stack	4398
268	Maximum Sum Increasing Subsequence	4387
269	Search Suggestions System LeetCode Solution	4371
270	Maximum Population Year LeetCode Solution	4367
271	Single Number	4349
272	Find the Number Occurring Odd Number of Times in an Array	4343
273	Sum of Subarray Ranges Leetcode Solution	4340
274	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4338
275	Find Words That Can Be Formed by Characters Leetcode Solution	4326
276	Reformat Date LeetCode Solution	4307
277	Top K Frequent Words LeetCode Solution	4303
278	Longest Common Subsequence	4288
279	Remove Nth Node From End of List Leetcode Solution	4268
280	Minimum Path Sum Leetcode Solution	4261
281	N-th Tribonacci Number Leetcode Solution	4233
282	Reverse individual words	4227
283	Intersection of Two Arrays	4227
284	Maximum Depth of Binary Tree Leetcode Solution	4221
285	Reveal Cards In Increasing Order Leetcode Solution	4201
286	Evaluate Division	4200
287	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4198
288	BFS for Disconnected Graph	4198
289	Maximize Distance to Closest Person LeetCode Solution	4184
290	Last Stone Weight II LeetCode Solution	4182
291	House Robber	4178
292	Remove Duplicates from Sorted List LeetCode Solution	4175
293	Best Time to Buy and Sell Stock III Leetcode Solution	4174
294	Minimum Characters to be Added at Front to Make String Palindrome	4164
295	Diagonal Traverse LeetCode Solution	4151
296	Find any one of the multiple repeating elements in read only array	4133
297	Count of index pairs with equal elements in an array	4125
298	Design A Leaderboard Leetcode Solution	4123
299	Find if Path Exists in Graph Leetcode Solution	4122
300	Count Number of Occurrences in a Sorted Array	4115
301	Length of Longest valid Substring	4111
302	Sort Elements by Frequency of Occurrences	4107
303	Binary Tree Inorder Traversal LeetCode Solution	4103
304	Most Frequent Element in an Array	4103
305	Minimum number of Merge Operations to make an Array Palindrome	4064
306	Implement a stack using single queue	4060
307	Range Sum Query 2D – Immutable Leetcode Solution	4054
308	Find the Closest Palindrome number	4028
309	Brightest Position on Street LeetCode Solution	4026
310	Maximum Size Subarray Sum Equals k Leetcode Solution	4015
311	Find Leaves of Binary Tree LeetCode Solution	4003
312	Mobile Numeric Keypad Problem	3998
313	Partition Array Into Three Parts With Equal Sum Leetcode Solution	3986
314	Invalid Transactions LeetCode Solution	3981
315	Reverse Nodes in k-Group LeetCode Solution	3979
316	Reverse Bits	3974
317	Spiral Matrix II Leetcode Solution	3971
318	Special Positions in a Binary Matrix Leetcode Solution	3966
319	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3965
320	Remove All Ones With Row and Column Flips Leetcode Solution	3963
321	Shortest Word Distance Leetcode Solution	3957
322	Symmetric Tree Leetcode Solution	3952
323	Sort Array By Parity II Leetcode Solution	3952
324	Sudoku Solver	3943
325	Arrange given Numbers to Form the Biggest Number II	3929
326	Diagonal Traversal LeetCode Solution	3921
327	Paint House LeetCode Solution	3918
328	One Edit Distance LeetCode Solution	3904
329	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3886
330	Maximum Subarray	3886
331	Find Duplicates in an Array in Most Efficient Way	3872
332	Remove Invalid Parentheses Leetcode Solution	3870
333	Rank Transform of an Array Leetcode Solution	3867
334	Jump Game	3865
335	Split Linked List in Parts Leetcode Solution	3852
336	Partition Labels LeetCode Solution	3846
337	Unique Paths	3845
338	Construct BST from its given Level Order Traversal	3842
339	Minimum Moves to Equal Array Elements Leetcode Solution	3840
340	Alien Dictionary LeetCode Solution	3839
341	Hamming Distance Leetcode Solution	3825
342	Largest Rectangle in Histogram LeetCode Solution	3821
343	Round Robin Scheduling	3809
344	Tug of War	3798
345	Minimum operation to make all elements equal in array	3797
346	Bitwise AND of Numbers Range LeetCode Solution	3795
347	Maximal Square	3795
348	Least Number of Unique Integers after K Removals Leetcode Solution	3791
349	Minimum Depth of Binary Tree Leetcode Solution	3787
350	Dijkstra Algorithm	3787
351	Find Winner on a Tic Tac Toe Game Leetcode Solution	3785
352	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3783
353	Range Sum of BST LeetCode Solution	3782
354	The Celebrity Problem	3782
355	Next Permutation LeetCode Solution	3771
356	Pair of Positive Negative Values in an Array	3763
357	Maximum Circular Subarray Sum	3762
358	String Matching in an Array Leetcode Solution	3761
359	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3758
360	Check whether Strings are K Distance Apart or Not	3746
361	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3744
362	Smallest Subarray with k Distinct Numbers	3740
363	Given an Array of Pairs Find all Symmetric Pairs in it	3724
364	Merge Two Sorted Linked Lists	3724
365	Minimum Time Visiting All Points Leetcode Solution	3718
366	Minimum Cost to Hire K Workers	3716
367	Count of Triplets With Sum Less than Given Value	3716
368	Clone Graph LeetCode Solution	3710
369	Longest Common Prefix using Trie	3709
370	K Empty Slots LeetCode	3704
371	Transpose Graph	3699
372	Next Greater Element III LeetCode Solution	3694
373	Sort a stack using a temporary stack	3687
374	Check if a given array contains duplicate elements within k distance from each other	3680
375	Regular Expression Matching Regular Expression Matching LeetCode Solution	3678
376	Find minimum difference between any two elements	3678
377	Implementation of Deque using circular array	3674
378	Minimize Maximum Pair Sum in Array LeetCode Solution	3671
379	Robot Bounded In Circle LeetCode Solution	3664
380	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3662
381	Ugly Number II LeetCode Solution	3656
382	Unique Paths III LeetCode Solution	3647
383	Postfix to Prefix Conversion	3640
384	Non-decreasing Array LeetCode Solution	3632
385	Substring with Concatenation of All Words Leetcode Solution	3625
386	Validate Stack Sequences LeetCode Solution	3624
387	Invert Binary Tree LeetCode Solution	3623
388	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3617
389	Invert Binary Tree LeetCode Solution	3615
390	Sliding Window Technique	3608
391	Permutation Sequence LeetCode Solution	3605
392	Longest Substring with At Most K Distinct Characters LeetCode Solution	3602
393	Longest subarray not having more than K distinct elements	3602
394	Graph Valid Tree LeetCode Solution	3593
395	Find the Smallest Divisor given a Threshold Leetcode Solution	3590
396	Find duplicates in a given array when elements are not limited to a range	3590
397	Missing Element in Sorted Array LeetCode Solution	3589
398	LRU Cache Implementation	3588
399	Kth Smallest Element in a BST Leetcode Solution	3583
400	Find the subarray with least average	3583
401	Stack Permutations (Check if an array is stack permutation of other)	3581
402	Design Browser History LeetCode Solution	3580
403	Find the First and Second Smallest Elements	3579
404	Longest subsequence such that difference between adjacents is one	3577
405	First Circular Tour to Visit all the Petrol Bunks	3577
406	Number of Islands II LeetCode Solution	3574
407	Find Top K (or Most Frequent) Numbers in a Stream	3572
408	Path With Maximum Minimum Value LeetCode Solution	3571
409	Find Maximum Level sum in Binary Tree	3563
410	Kruskal Algorithm	3563
411	Stone Game II Leetcode	3562
412	Common elements in all rows of a given matrix	3561
413	Queries for counts of array elements with values in given range	3558
414	Word Search	3558
415	Toeplitz Matrix	3558
416	K Closest Points to Origin Leetcode Solution	3555
417	Sequences of given length where every element is more than or equal to twice of previous	3552
418	Combination Sum IV LeetCode Solution	3550
419	Snakes and Ladders LeetCode Solution	3538
420	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3537
421	Partition List Leetcode Solution	3535
422	Integer Break LeetCode Solution	3533
423	Recursion	3533
424	Number Complement Leetcode Solution	3529
425	Search a 2D Matrix II Leetcode Solution	3525
426	Number of Smaller Elements on Right Side	3523
427	Painting Fence Algorithm	3522
428	Max stack	3518
429	Maximum Number of Occurrences of a Substring Leetcode Solution	3511
430	Find the Peak Element from an Array	3496
431	3 Sum	3491
432	Longest Palindrome can be Formed by Removing or Rearranging Characters	3490
433	Odd Even Linked List Leetcode Solution	3489
434	Minesweeper LeetCode Solution	3483
435	Sort elements by frequency	3482
436	Top View of Binary Tree	3477
437	Priority Queue using doubly linked list	3472
438	LRU Cache Leetcode Solution	3468
439	Maximum Consecutive Numbers Present in an Array	3464
440	Nth Catalan Number	3464
441	Consecutive Characters LeetCode Solution	3463
442	Insert Interval Leetcode Solution	3461
443	Search in a Binary Search Tree Leetcode Solution	3461
444	Can Make Arithmetic Progression From Sequence Leetcode Solution	3460
445	Rearrange array such that even positioned are greater than odd	3458
446	Check if Two given Strings are Isomorphic to each other	3454
447	Find Minimum in Rotated Sorted Array II LeetCode Solution	3444
448	Flood Fill LeetCode	3439
449	Expression Contains Redundant Bracket or Not	3407
450	Distance of nearest cell having 1 in a binary matrix	3398
451	Design a stack that supports getMin() in O(1) time and O(1) extra space	3397
452	Shortest Palindrome	3396
453	Number of Closed Islands Leetcode Solution	3393
454	Kth Non-repeating Character	3392
455	High Five LeetCode Solution	3388
456	Replace Elements with Greatest Element on Right Side Leetcode Solution	3385
457	Move All the Zeros to the End of the Given Array	3383
458	Decompress Run-Length Encoded List Leetcode Solution	3381
459	Minimum Absolute Difference in BST Leetcode Solution	3381
460	Find a Peak Element II LeetCode Solution	3377
461	4Sum	3374
462	Sliding Window Maximum LeetCode Solution	3368
463	Check If Array Pairs Are Divisible by k LeetCode Solution	3367
464	Gold Mine Problem	3360
465	Spiral Matrix III LeetCode Solution	3359
466	Insert into a Binary Search Tree Leetcode Solution	3359
467	Integer to English words	3353
468	Tiling Problem	3343
469	Minimum Path Sum	3342
470	N queen problem	3339
471	Restore IP Addresses Leetcode Solution	3335
472	Queries for GCD of all numbers of an array except elements in a given range	3331
473	Binary Tree Maximum Path Sum LeetCode Solution	3327
474	Balanced Expression with Replacement	3327
475	Sorting array using Stacks	3321
476	Longest Common Prefix using Sorting	3321
477	Convert Sorted Array to Binary Search Tree Leetcode Solution	3318
478	Coin Change Problem	3317
479	Find All Possible Recipes from Given Supplies LeetCode Solution	3313
480	Best Time to Buy and Sell Stock	3307
481	Trapping Rain Water LeetCode Solution	3306
482	Count items common to both the lists but with different prices	3302
483	Sort Colors	3299
484	Majority Element	3298
485	Priority Queue in C++	3294
486	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3293
487	Find Pythagorean Triplets from Array	3291
488	Sliding Window Median Leetcode Solution	3287
489	Fibonacci Number LeetCode Solution	3284
490	Evaluate Reverse Polish Notation LeetCode Solution	3284
491	Cells with Odd Values in a Matrix LeetCode Solution	3284
492	Palindrome Substring Queries	3284
493	Number of Days Between Two Dates LeetCode Solution	3274
494	The Stock Span Problem	3269
495	Vertical Order Traversal of Binary Tree LeetCode Solution	3266
496	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3262
497	Interval Tree	3254
498	Sort an array according to the order defined by another array	3250
499	Reverse a linked list	3246
500	Is Graph Bipartite? LeetCode Solution	3245
501	Path Sum II LeetCode Solution	3236
502	Largest rectangular sub-matrix whose sum is 0	3234
503	Pancake Sorting Problem	3230
504	Camelcase Matching Leetcode Solution	3213
505	Find the first Repeating Number in a Given Array	3213
506	Different Ways to Add Parentheses Leetcode Solution	3208
507	How to Implement Stack Using Priority Queue or Heap?	3208
508	Queue using Stacks	3207
509	Kth ancestor of a node in binary tree	3205
510	Intersection of Two Linked Lists LeetCode Solution	3202
511	Custom Sort String Leetcode Solution	3202
512	Shortest Completing Word Leetcode Solution	3200
513	Design Hit Counter LeetCode Solution	3194
514	Sieve of Eratosthenes	3190
515	Longest Increasing Path in a Matrix LeetCode Solution	3189
516	Divide Chocolate LeetCode Solution	3187
517	Find Median from Data Stream LeetCode Solution	3180
518	Multiplication of Two Matrices	3176
519	Find a Fixed Point in a Given Array	3175
520	Check if Array Contains Contiguous Integers With Duplicates Allowed	3174
521	Scramble String LeetCode Solution	3173
522	Analyze User Website Visit Pattern LeetCode Solution	3169
523	Count subarrays having total distinct elements same as original array	3168
524	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3167
525	Subset sum problem	3167
526	Detect a loop in the Linked List	3159
527	Perfect Squares LeetCode Solution	3153
528	Fibonacci numbers	3151
529	Count Submatrices With All Ones LeetCode Solution	3144
530	Queue based approach for first non-repeating character in a stream	3137
531	Group Anagrams	3133
532	Number of Distinct Islands Leetcode Solution	3131
533	Implement Trie (Prefix Tree) Leetcode Solution	3131
534	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3125
535	Reorder Data in Log Files LeetCode Solution	3124
536	Path Crossing Leetcode Solution	3120
537	Monotonic Array Leetcode Solution	3116
538	Valid Boomerang Leetcode Solution	3114
539	Generate all Binary Strings from Given Pattern	3112
540	Find the Lost Element From a Duplicated Array	3107
541	Champagne Tower LeetCode Solution	3105
542	Longest Common Prefix using Divide and Conquer	3103
543	Insert Node in the Sorted Linked List	3101
544	Maximum Sum of Non Consecutive Elements	3094
545	Construction of Longest Increasing Subsequence (N log N)	3086
546	Minimum Height Trees	3086
547	How to Create Mergable Stack?	3084
548	Merge Overlapping Intervals	3078
549	Nearest Exit from Entrance in Maze LeetCode Solution	3073
550	Sort a stack using recursion	3072
551	Race Car LeetCode Solution	3067
552	Decode Ways	3066
553	Shifting Letters LeetCode Solution	3065
554	Find if an Expression has Duplicate Parenthesis or Not	3065
555	Palindrome Permutation LeetCode Solution	3064
556	Build an Array With Stack Operations Leetcode Solution	3060
557	Count Possible Triangles	3056
558	First missing positive	3052
559	Recover Binary Search Tree	3051
560	Find a Sorted Subsequence of size 3	3047
561	Find maximum length Snake sequence	3046
562	Decode String	3046
563	Binary Tree zigzag level order Traversal	3045
564	Merge Two Binary Trees LeetCode Solution	3042
565	Smallest Good Base	3042
566	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3040
567	Sliding Window Maximum	3035
568	LCS (Longest Common Subsequence) of three strings	3033
569	Most Stones Removed with Same Row or Column LeetCode Solution	3030
570	Minimum Bracket Reversals	3027
571	Number of Equivalent Domino Pairs Leetcode Solution	3025
572	Print all Palindromic Partitions of a String	3025
573	Letter Case Permutation	3019
574	Morris Traversal	3017
575	Rectangle Overlap LeetCode Solution	3014
576	Minimum Height Trees LeetCode Solution	3011
577	Maximum Element in an Array which is Increasing and then Decreasing	3007
578	Largest Subarray with Equal Number of 0’s and 1’s	3006
579	Palindrome Partitioning Leetcode Solution	3004
580	Recover Binary Search Tree Leetcode Solution	3002
581	Implement strStr() LeetCode Solution	3000
582	Distance Between Bus Stops Leetcode Solution	2999
583	Minimum number of jumps to reach end	2995
584	Maximum Number of Ways to Partition an Array LeetCode Solution	2992
585	Longest Substring with At Least K Repeating Characters LeetCode Solution	2992
586	Guess Number Higher or Lower II	2981
587	K-th Distinct Element in an Array	2979
588	Maximum Length of Chain Pairs	2979
589	Design a Stack With Increment Operation Leetcode Solution	2978
590	Find the Town Judge LeetCode Solution	2977
591	Reorder an Array According to the Given Indexes	2977
592	Longest Repeated Subsequence	2976
593	Best Time to Buy and Sell Stock IV LeetCode Solution	2965
594	Contiguous Array LeetCode Solution	2963
595	Implement Two Stacks in an Array	2958
596	Maximum Depth of N-ary Tree Leetcode Solution	2956
597	Mean of Array After Removing Some Elements Leetcode Solution	2948
598	Jump Game IV LeetCode Solution	2941
599	Design Skiplist LeetCode Solution	2941
600	Find the two Numbers with Odd Occurrences in an Unsorted Array	2939
601	All Possible Full Binary Trees LeetCode Solution	2937
602	The Maze III LeetCode Solution	2937
603	Maximize Elements Using Another Array	2937
604	Subarrays with K Different Integers Leetcode Solution	2936
605	Valid Parentheses Leetcode Solution	2934
606	Check for Balanced Parentheses in an Expression	2933
607	Rearrange Spaces Between Words Leetcode Solution	2930
608	Sort a String According to Another String	2927
609	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2924
610	Maximum sum rectangle in a 2D matrix	2913
611	Contains Duplicate	2912
612	Minimum Jumps to Reach Home LeetCode Solution	2898
613	Boolean Parenthesization Problem	2883
614	Word Break	2879
615	Convert BST to Min Heap	2877
616	Palindrome Permutations of a String	2877
617	Perform String Shifts Leetcode	2874
618	Count pair with Given Sum	2873
619	Iterative Method to find Height of Binary Tree	2870
620	Valid Sudoku	2863
621	Maximum Score After Splitting a String Leetcode Solution	2861
622	Possible Bipartition LeetCode Solution	2856
623	Edit Distance LeetCode Solution	2854
624	Find the Minimum Element in a Sorted and Rotated Array	2853
625	Find the First Circular Tour that visits all the Petrol Pumps	2842
626	Maximum Product of Splitted Binary Tree LeetCode Solution	2841
627	A Space Optimized DP solution for 0-1 Knapsack Problem	2839
628	Reach a Number LeetCode Solution	2832
629	Best Meeting Point LeetCode Solution	2821
630	Number of palindromic paths in a matrix	2817
631	Merge Two Balanced Binary Search Trees	2815
632	Find Largest Value in Each Tree Row LeetCode Solution	2804
633	Find the Subarray of given length with Least Average	2802
634	Segregate 0s and 1s in an Array	2799
635	Sorted Linked List to Balanced BST	2799
636	Merge Overlapping Intervals II	2797
637	Count Sub Islands LeetCode Solution	2792
638	Brick Wall LeetCode Solution	2790
639	Check if the given array can represent Level Order Traversal of Binary Search Tree	2790
640	My Calendar I LeetCode Solution	2789
641	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2783
642	Swapping Nodes in a Linked List Leetcode Solution	2783
643	Caesar Cipher	2782
644	Heap Sort	2780
645	Level order Traversal in Spiral Form	2774
646	Palindromic Substrings Leetcode Solution	2766
647	Find Median from data Stream	2760
648	Construct BST from given Preorder Traversal	2757
649	Merge K Sorted Arrays and Print Sorted Output	2752
650	Palindrome Permutation	2750
651	Pair with given product	2749
652	All Unique Triplets that Sum up to a Given Value	2748
653	Word Pattern	2743
654	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2735
655	Maximize Sum of Array after K Negations Leetcode Solution	2726
656	Find First and Last Position of Element in Sorted Array LeetCode Solution	2725
657	Find all triplets with zero sum	2725
658	Print Fibonacci sequence using 2 variables	2715
659	Find whether a subarray is in form of a mountain or not	2714
660	Validate Binary Search Tree	2714
661	Maximum Frequency Stack Leetcode Solution	2704
662	Find all pairs (a, b) in an array such that a % b = k	2702
663	Huffman Coding	2700
664	Count Distinct Elements in Every Window of Size K	2698
665	Bubble sort using two Stacks	2693
666	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2693
667	Convert Sorted List to Binary Search Tree	2689
668	Queries on Probability of Even or Odd Number in given Ranges	2686
669	Minimum time required to rot all oranges	2685
670	Add two numbers	2684
671	Partition Problem	2684
672	Isomorphic Strings LeetCode Solution	2681
673	Counting Bits	2679
674	Longest Subarray Having Count of 1s One More than Count of 0s	2678
675	Find four elements that sum to a given value (Hashmap)	2676
676	Length of Longest Fibonacci Subsequence	2672
677	How to Efficiently Implement k Stacks in a Single Array?	2670
678	Split Array Into Consecutive Subsequences	2669
679	Sort 0s 1s and 2s in an Array	2668
680	Largest Sum Contiguous Subarray	2667
681	Binary Tree Right Side View LeetCode Solution	2665
682	Detect Capital Leetcode Solution	2661
683	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2655
684	Rotate Array	2644
685	Range Sum Query 2D – Immutable LeetCode Solution	2643
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	2641
687	Minimum Swaps to Group All 1’s Together Leetcode Solution	2636
688	Print all subarrays with 0 sum	2636
689	Remove brackets from an algebraic string containing + and – operators	2636
690	Count Good Nodes in Binary Tree LeetCode Solution	2635
691	Populating Next Right Pointers in Each Node Leetcode Solution	2632
692	Remove Palindromic Subsequences Leetcode Solution	2632
693	Partition to K Equal Sum Subsets Leetcode Solution	2629
694	Count ways to reach the nth stair using step 1, 2 or 3	2625
695	Populating Next Right Pointers in Each Node	2622
696	Binary Tree to Binary Search Tree Conversion	2620
697	Merge Two Sorted Lists Leetcode	2619
698	String comparison containing wildcards	2615
699	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2607
700	Find pairs with given sum such that elements of pair are in different rows	2607
701	Arithmetic Slices II – Subsequence LeetCode Solution	2604
702	Maximum Number of Chocolates to be Distributed Equally Among k Students	2586
703	Minimum Sum Path in a Triangle	2582
704	Happy Number	2579
705	Alien Dictionary	2570
706	Check if a Linked list of Strings form a Palindrome	2569
707	Concatenation of Array LeetCode Solution	2568
708	Queue Reconstruction by Height	2568
709	Web Crawler LeetCode Solution	2566
710	Partition Equal Subset Sum	2562
711	Inorder Successor of a node in Binary Tree	2561
712	Find Duplicate Subtrees	2557
713	Topological Sorting	2549
714	Contiguous Array Leetcode	2547
715	Difference Array \| Range update query in O(1)	2546
716	Breadth First Search (BFS) for a Graph	2544
717	Find All Pairs With a Given Difference	2541
718	Swap Kth Node from beginning with Kth Node from End	2540
719	Increasing Subsequence of Length three with Maximum Product	2538
720	Check if String Follows Order of Characters by a Pattern or not	2532
721	Root to Leaf path with target sum Leetcode Solutions	2523
722	Remove duplicates from sorted array	2516
723	Longest Common Prefix Using Binary Search II	2515
724	Reverse Nodes in K-Group	2511
725	Elements Appear more than N/K times in Array	2508
726	Maximum Product Subarray II	2506
727	Maximum Distance in Array	2498
728	Container with Most Water	2493
729	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2492
730	Minimum Swaps to Make Strings Equal Leetcode Solution	2490
731	Climbing stairs	2487
732	Count Minimum Steps to Get the given Array	2479
733	Sum Root to Leaf Numbers LeetCode Solution	2478
734	An Interesting Method to generate Binary Numbers from 1 to n	2470
735	Parallel Courses II LeetCode Solution	2469
736	Substring With Concatenation Of All Words	2467
737	Finding K closest element	2466
738	Check if all levels of two Binary Tree are anagrams or not	2463
739	Symmetric Tree	2462
740	Pancake Sorting	2460
741	Delete Nodes and Return Forest Leetcode Solution	2457
742	Longest Increasing Subsequence	2455
743	Deletion in a Binary Tree	2453
744	Score of Parenthesis LeetCode Solution	2450
745	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2449
746	Delete Nth node from the end of the given linked list	2447
747	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2442
748	Given a binary tree, how do you remove all the half nodes?	2442
749	Boundary Traversal of binary tree	2436
750	Iterative Depth First Traversal of Graph	2434
751	Find the first repeating element in an array of integers	2433
752	MiniMax Algorithm	2432
753	Linked List Cycle	2425
754	Sort Array by Increasing Frequency Leetcode Solution	2424
755	Merge K Sorted Linked Lists	2424
756	Union and Intersection of two Linked Lists	2421
757	Non-overlapping sum of two sets	2421
758	Find K Closest Elements LeetCode Solution	2418
759	Kill Process LeetCode Solution	2416
760	Longest Common Prefix Word by Word Matching	2416
761	Count pairs from two linked lists whose sum is equal to a given value	2413
762	Minimum Size Subarray Sum	2413
763	Iterative Preorder Traversal	2407
764	Construct Binary Tree from given Parent Array representation	2406
765	New 21 Game	2401
766	Rearrange an Array Such that arr[i] is equal to i	2399
767	Find Maximum of Minimum for Every Window Size in a Given Array	2399
768	Level of Each node in a Tree from source node	2398
769	Verify Preorder Serialization of a Binary Tree	2397
770	Minimum Remove to Make Valid Parentheses LeetCode Solution	2392
771	Level order traversal using two Queues	2387
772	Check if a queue can be sorted into another queue using a stack	2383
773	Nested List Weight Sum II LeetCode Solution	2382
774	BFS vs DFS for Binary Tree	2376
775	Reservoir Sampling	2372
776	Merging Intervals	2370
777	Find the Difference Leetcode Solution	2368
778	Valid Anagrams	2359
779	Maximum Product Subarray	2358
780	Maximum size subarray sum equals k	2358
781	Matrix Chain Multiplication	2355
782	Range LCM Queries	2353
783	Remove Duplicates from Sorted List II	2351
784	Reorder Array Using Given Indexes	2348
785	Flatten Binary Tree to Linked List LeetCode Solution	2346
786	Palindrome Partitioning	2346
787	Smallest Range II Leetcode Solution	2343
788	Print a Binary Tree in Vertical Order	2341
789	K maximum sums of overlapping contiguous sub-arrays	2337
790	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2335
791	Super Ugly Number	2332
792	Vertical sum in a given binary tree	2331
793	Defanging an IP Address LeetCode Solution	2325
794	Friends Of Appropriate Ages LeetCode Solution	2318
795	Valid Triangle Number LeetCode Solution	2307
796	Balanced Binary Tree	2307
797	Check if Two Expressions With Brackets are Same	2306
798	Maximum difference between two elements such as larger element comes after smaller	2303
799	Missing Number	2297
800	Check if any two intervals overlap among a given set of intervals	2296
801	The Painter’s Partition Problem	2296
802	Minimum Distance Between BST Nodes Leetcode Solution	2294
803	Flatten 2D Vector LeetCode Solution	2291
804	Find subarray with given sum (Handles Negative Numbers)	2291
805	Create Maximum Number	2291
806	Number Of Longest Increasing Subsequence	2290
807	Largest Submatrix With Rearrangements LeetCode Solution	2287
808	Find Three Element From Different Three Arrays Such That a + b + c = sum	2283
809	Employee Importance LeetCode Solution	2282
810	Find Maximum Sum Possible Equal Sum of Three Stacks	2280
811	Find K Length Subarray of Maximum Average	2280
812	Check if a given array can represent Preorder Traversal of Binary Search Tree	2278
813	Lowest Common Ancestor	2278
814	Count number of triplets with product equal to given number	2274
815	Unique Binary Search Trees LeetCode Solution	2272
816	Check if two nodes are on the same path in a Tree	2258
817	Find Peak Element	2258
818	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2257
819	Peak Index in a Mountain Array LeetCode Solution	2256
820	Closest Leaf in a Binary Tree LeetCode Solution	2255
821	Array Nesting Leetcode Solution	2250
822	Minimum insertions to form a palindrome with permutations allowed	2250
823	Valid Triangle Number LeetCode Solution	2244
824	Third Maximum Number Leetcode Solution	2240
825	Maximum subsequence sum such that no three are consecutive	2240
826	Find distance between two nodes of a Binary Tree	2240
827	Find Common Characters Leetcode Solution	2236
828	Find Smallest Range Containing Elements from k Lists	2235
829	Hamming Distance	2235
830	Check Completeness of a Binary Tree LeetCode Solution	2234
831	Largest BST Subtree LeetCode Solution	2234
832	Iterative Postorder Traversal Using Two Stacks	2228
833	Distinct Subsequences	2225
834	Print all triplets in sorted array that form AP	2223
835	First Bad Version	2223
836	Find Sum of all unique sub-array sum for a given array	2221
837	Print All Distinct Elements of a Given Integer Array	2218
838	Products of ranges in an array	2217
839	Sorting a K Sorted Array	2216
840	Newman-Conway Sequence	2214
841	Arrange given numbers to form the biggest number	2213
842	Merging Two Sorted Arrays	2212
843	Valid Parenthesis String	2211
844	Sort Elements by Frequency II	2211
845	Maximum number of segments of lengths a, b and c	2208
846	Largest divisible pairs subset	2207
847	Find Element Using Binary Search in Sorted Array	2205
848	Number of siblings of a given Node in n-ary Tree	2203
849	Tree Traversal (Preorder, Inorder & Postorder)	2200
850	Bottom View of a Binary Tree	2196
851	Longest Palindromic Subsequence	2195
852	Path Sum	2189
853	Stone Game IV LeetCode Solution	2176
854	Find the largest multiple of 3	2176
855	Lower Case To Upper Case	2175
856	Largest subarray with equal number of 0s and 1s	2170
857	Diagonal Traversal of Binary Tree	2167
858	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2164
859	Print Right View of a Binary Tree	2163
860	Four Elements that Sum to Given	2163
861	Merge Two Sorted Arrays	2160
862	Contiguous Array	2159
863	Binary array after M range toggle operations	2156
864	Range Sum Query using Sparse Table	2155
865	Count and Say	2155
866	Stone Game IV LeetCode Solution	2154
867	Shuffle an Array	2154
868	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2151
869	Segment Tree	2150
870	Subset Sum Problem in O(sum) space	2141
871	Median of Two Sorted Arrays	2141
872	Unique Binary Search Trees	2138
873	Isomorphic Strings	2137
874	Permutations of a Given String Using STL	2136
875	Encoded String With Shortest Length LeetCode Solution	2131
876	Find Largest d in Array such that a + b + c = d	2130
877	Longest Bitonic Subsequence	2129
878	Averages of Levels in Binary Tree	2124
879	Find Nth Node	2118
880	Next Greater Element in an Array	2116
881	Red-Black Tree Introduction	2111
882	Maximum Sum of 3 Non-Overlapping Subarrays	2111
883	Valid Number	2111
884	Infix to Postfix	2110
885	Closest Binary Search Tree Value Leetcode Solution	2103
886	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2103
887	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2103
888	Height of a generic tree from parent array	2097
889	Maximum Product Subarray	2097
890	Find unique character in a string	2097
891	Friends Pairing Problem	2094
892	Transform a BST to Greater sum Tree	2092
893	Orderly Queue LeetCode Solution	2087
894	Count Primes in Ranges	2087
895	Trapping Rain Water II LeetCode Solution	2074
896	Maximum Population Year LeetCode Solution	2073
897	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2070
898	Valid Perfect Square LeetCode Solution	2067
899	Binary Tree Longest Consecutive Sequence LeetCode Solution	2062
900	Bold Words in String LeetCode Solution	2061
901	Write a function to get the intersection point of two Linked Lists	2056
902	Serialize and Deserialize Binary Tree	2051
903	Binary Search Tree Delete Operation	2049
904	Range Minimum Query (Square Root Decomposition and Sparse Table)	2048
905	Minimum sum of squares of character counts in a given string after removing k characters	2048
906	Shuffle a given Array	2042
907	Sentence Screen Fitting LeetCode Solution	2039
908	Insert Delete GetRandom	2032
909	The Number of Weak Characters in the Game LeetCode Solution	2030
910	Kth Smallest Number in Multiplication Table Leetcode Solution	2030
911	Diameter of N-Ary Tree LeetCode Solution	2028
912	Swap Nodes In Pairs	2024
913	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2022
914	Next greater element	2018
915	Convert BST into a Min-Heap without using array	2015
916	Lowest Common Ancestor in Binary Search Tree	2008
917	Reorganize String	2008
918	K’th Largest Element in BST when modification to BST is not allowed	2004
919	Integer to Roman	1996
920	Maximum Product Subarray	1990
921	Find Minimum In Rotated Sorted Array	1990
922	Edit Distance	1979
923	Array Queries for multiply replacements and product	1978
924	Advantages of BST over Hash Table	1977
925	Next Greater Element II LeetCode Solution	1976
926	Total Hamming Distance LeetCode Solution	1970
927	Queries on XOR of greatest odd divisor of the range	1963
928	Constant time range add operation on an array	1960
929	Koko Eating Bananas LeetCode Solution	1959
930	Check if an Array is Stack Sortable	1955
931	Longest Increasing Consecutive Subsequence	1950
932	Serialize and Deserialize Binary Tree LeetCode Solution	1949
933	Find the smallest binary digit multiple of given number	1947
934	Best Meeting Point LeetCode Solution	1944
935	Print n terms of Newman-Conway Sequence	1942
936	Maximum Sum Increasing Subsequence	1942
937	Level Order Traversal of Binary Tree	1940
938	Clone a Binary Tree with Random Pointers	1938
939	Power of Two	1936
940	K’th Largest element in BST using constant extra space	1932
941	Moving Stones Until Consecutive Leetcode Solution	1929
942	Image Overlap LeetCode Solution	1928
943	Reverse a Path in BST using Queue	1923
944	Numbers with prime frequencies greater than or equal to k	1922
945	Range Queries for Longest Correct Bracket Subsequence	1920
946	Design Underground System Leetcode Solution	1919
947	Write Code to Determine if Two Trees are Identical	1918
948	Number of Orders in the Backlog Leetcode Solution	1917
949	Greatest Sum Divisible by Three LeetCode Solution	1910
950	Count and Toggle Queries on a Binary Array	1910
951	Valid Tic-Tac-Toe State LeetCode Solution	1909
952	Check if X can give change to every person in the Queue	1906
953	A program to check if a binary tree is BST or not	1904
954	Print Next Greater Number of Q queries	1900
955	Find the node with minimum value in a Binary Search Tree	1899
956	Design Add and Search Words Data Structure LeetCode Solution	1895
957	Insert into a Sorted Circular Linked List LeetCode Solution	1890
958	Find minimum number of merge operations to make an array palindrome	1889
959	Closest Binary Search Tree Value II LeetCode Solution	1887
960	Form minimum number from given sequence	1887
961	Check for Palindrome after every character replacement Query	1886
962	Factorial Trailing Zeroes LeetCode Solution	1884
963	Check if each internal node of a BST has exactly one child	1884
964	Count the Pairs at Same Distance as in English Alphabets	1879
965	Merge two BSTs with limited extra space	1878
966	Number of elements less than or equal to a given number in a given subarray	1877
967	Maximum Array from Two given Arrays Keeping Order Same	1875
968	Queries for Decimal Values of Subarrays of a Binary Array	1873
969	Largest Plus Sign Leetcode Solution	1869
970	Collect maximum points in a grid using two traversals	1863
971	Merge Sort	1863
972	Maximum difference between first and last indexes of an element in array	1853
973	Dividing Array into Pairs With Sum Divisible by K	1852
974	Group Shifted Strings Leetcode Solution	1845
975	Priority Queue	1833
976	Merge Sorted Array	1832
977	Longest Substring Without Repeating Characters Leetcode Solution	1827
978	Print modified array after multiple array range increment operations	1824
979	Count even length binary sequences with same sum of first and second half bits	1823
980	Graph Cloning	1816
981	Cutting a Rod	1807
982	Print Ancestors of a Given Binary Tree Node Without Recursion	1799
983	Form Minimum Number From Given Sequence	1793
984	Swim in Rising Water LeetCode Solution	1784
985	Find maximum average subarray of k length	1784
986	Kth Smallest Element in a BST	1784
987	Count Pairs Whose Products Exist in Array	1782
988	Excel Sheet Column Number LeetCode Solution	1778
989	Minimum Moves to Equal Array Elements LeetCode Solution	1776
990	Unique Paths II	1766
991	Excel Sheet Column Title LeetCode Solution	1763
992	Binary Search Tree	1761
993	Guess The Word	1760
994	Decrease Elements To Make Array Zigzag LeetCode Solution	1756
995	Palindrome Partitioning	1755
996	Print all Possible Ways to Break a String in Bracket Form	1753
997	K Empty Slots	1752
998	Check given array of size n can represent BST of n levels or not	1748
999	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1747
1000	Binary Search Tree Search and Insertion	1746
1001	Longest Common Prefix using Character by Character Matching	1745
1002	Regular Expression Matching	1739
1003	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1736
1004	Sorted Array to Balanced BST	1730
1005	How to print maximum number of A’s using given four keys	1726
1006	Sum of Left Leaves LeetCode Solution	1711
1007	Find postorder traversal of BST from preorder traversal	1702
1008	Maximum weight transformation of a given string	1681
1009	Construct Complete Binary Tree from its Linked List Representation	1681
1010	Queries for Number of Distinct Elements in a Subarray	1671
1011	Find the Town Judge LeetCode Solution	1653
1012	Symmetric Tree LeetCode Solution Leetcode Solution	1648
1013	Iterative method to find ancestors of a given binary tree	1648
1014	Maximum Depth Of Binary Tree	1647
1015	Binary Tree to Binary Search Tree Conversion using STL set	1639
1016	Shortest Unsorted Continuous Subarray LeetCode Solution	1638
1017	Random Pick Index LeetCode Solution	1625
1018	Data Structure Designing	1621
1019	Search in Sorted Rotated Array	1613
1020	Find Maximum Depth of Nested Parenthesis in a String	1594
1021	Search an Element in Sorted Rotated Array	1576
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1553
1023	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1546
1024	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1541
1025	Next Greater Element I Leetcode Solution	1499
1026	Maximum Binary Tree	1485
1027	Print Maximum Length Chain of Pairs	1475
1028	Flatten Binary Tree to Linked List LeetCode Solution	1461
1029	Find k-th smallest element in BST (Order Statistics in BST)	1446
1030	Peeking Iterator LeetCode Solution	1423
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1409