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	43267
2	Maximum occurring character in a string	19608
3	Plus One Leetcode Solution	19021
4	Valid Parentheses LeetCode Solution	18963
5	3Sum Leetcode Solution	16889
6	Merge Sorted Arrays Leetcode Solution	15034
7	First Repeating Element	15004
8	Single Number Leetcode Solution	14682
9	Count Primes Leetcode Solutions	14463
10	Pow(x, n) Leetcode Solution	14081
11	Sqrt(x) Leetcode Solution	13909
12	Meeting Rooms II LeetCode Solution	13029
13	Concatenation of Array LeetCode Solution	12611
14	Roman to Integer Leetcode Solution	11786
15	Valid Palindrome Leetcode Solution	11671
16	Search Insert Position Leetcode Solution	11607
17	Contains Duplicate II Leetcode Solution	11603
18	Palindrome Number LeetCode Solution	11425
19	Remove Duplicates from Sorted Array Leetcode Solution	11211
20	Jump Game Leetcode Solution	11040
21	Reverse Vowels of a String Leetcode Solution	11012
22	Intersection of Two Arrays II Leetcode Solution	10908
23	Longest Substring Without Repeating Characters LeetCode Solution	10815
24	Number of Good Pairs Leetcode Solution	10765
25	Spiral Matrix LeetCode Solution	10688
26	Kids With the Greatest Number of Candies Leetcode Solution	10639
27	House Robber Leetcode Solution	10545
28	Add Binary Leetcode Solution	10468
29	Maximum Subarray Leetcode Solution	10097
30	Number Of 1 bits	9906
31	Find the Maximum Repeating Number in Array	9844
32	Text Justification LeetCode Solution	9688
33	Jewels and Stones Leetcode Solution	9606
34	Move Zeroes LeetCode Solution	9582
35	Min Stack Leetcode Solution	9457
36	Power of Two Leetcode Solution	9430
37	Longest Palindromic Substring LeetCode Solution	9386
38	Permutations Leetcode Solution	9244
39	Shuffle String Leetcode Solution	9244
40	Third Maximum Number Leetcode Solution	9134
41	Word Search Leetcode Solution	9095
42	Find All Numbers Disappeared in an Array Leetcode Solution	9081
43	Daily Temperatures Leetcode Solution	9049
44	Next Permutation Leetcode Solution	9031
45	Evaluation of Postfix Expression	9016
46	Median of Two Sorted Arrays LeetCode Solution	9001
47	Search in Rotated Sorted Array Leetcode Solution	8970
48	Number of Islands LeetCode Solution	8897
49	Kth Missing Positive Number Leetcode Solution	8838
50	Maximum Profit in Job Scheduling Leetcode Solution	8815
51	Longest Common Prefix Leetcode Solution	8810
52	Next Greater Element I Leetcode Solution	8735
53	Frog Jump Leetcode Solution	8620
54	Find Minimum Distance Between Two Numbers in an Array	8479
55	Valid Anagram Leetcode Solution	8449
56	Rotate Image LeetCode Solution	8390
57	Running Sum of 1d Array Leetcode Solution	8388
58	Multiply Strings Leetcode Solution	8339
59	Shuffle the Array Leetcode Solution	8328
60	Can Place Flowers LeetCode Solution	8284
61	Combination Sum Leetcode Solution	8274
62	Count and Say Leetcode Solution	8246
63	House Robber II Leetcode Solution	8229
64	3Sum Closest LeetCode Solution	8201
65	Bulb Switcher LeetCode Solution	8173
66	Excel Sheet Column Title Leetcode Solution	7982
67	Best Time to Buy and Sell Stock LeetCode Solution	7950
68	Koko Eating Bananas Leetcode Solution	7950
69	Isomorphic Strings Leetcode Solution	7915
70	Happy Number Leetcode Solution	7906
71	Subarray and Subsequence	7897
72	Majority Element Leetcode Solution	7821
73	Count Pairs With Given Sum	7798
74	Integer to Roman Leetcode Solution	7784
75	Missing Number Leetcode Solution	7769
76	Product of array except self	7736
77	Strobogrammatic Number LeetCode Solution	7690
78	Rotate String LeetCode Solution	7689
79	Candy LeetCode Solution	7681
80	Reverse String Without Temporary Variable	7598
81	Is Subsequence Leetcode Solution	7551
82	A Product Array Puzzle	7524
83	Find the Difference Leetcode Solution	7518
84	Find the Duplicate Number LeetCode Solution	7467
85	Largest Number Leetcode Solution	7451
86	Find Common Characters Leetcode Solution	7431
87	Expression Evaluation	7431
88	Binary Search LeetCode Solution	7430
89	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	7367
90	String to Integer (atoi) LeetCode Solution	7295
91	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	7286
92	Subset Leetcode	7224
93	Set Matrix Zeroes	7182
94	Summary Ranges Leetcode Solution	7173
95	Sort Characters By Frequency LeetCode Solution	7123
96	Rabin Karp Algorithm	7106
97	Word Pattern LeetCode Solution	7091
98	Balanced Binary Tree Leetcode Solution	7089
99	Find the Town Judge Leetcode Solution	7068
100	Unique Paths Leetcode Solution	7006
101	Arranging Coins Leetcode Solution	6996
102	Find the Winner of the Circular Game LeetCode Solution	6981
103	String Compression LeetCode Solution	6894
104	Rearrange Positive and Negative Numbers Alternatively in Array	6884
105	Asteroid Collision LeetCode Solution	6852
106	Repeated Substring Pattern LeetCode Solution	6801
107	Group Anagrams LeetCode Solution	6791
108	Smallest window in a string containing all characters of another string	6743
109	Postfix to Infix Conversion	6738
110	Page Replacement Algorithms in Operating Systems	6724
111	Sort Colors LeetCode Solution	6718
112	Matrix Chain Multiplication using Dynamic Programming	6662
113	Best Time to Buy and Sell Stock II Leetcode Solution	6646
114	Sort Array By Parity LeetCode Solution	6582
115	Zigzag Conversion LeetCode Solution	6549
116	Divide Two Integers Leetcode Solution	6508
117	Valid Palindrome II Leetcode Solution	6483
118	Generate Parentheses Leetcode Solution	6468
119	Kth largest element in an Array Leetcode Solutions	6464
120	Sum of minimum and maximum elements of all subarrays of size k	6458
121	Reverse Integer Leetcode Solution	6392
122	Remove Duplicates from Sorted Array II Leetcode Solution	6374
123	Assign Cookies Leetcode Solution	6373
124	Product of Array Except Self LeetCode Solution	6352
125	Length of Last Word Leetcode Solution	6315
126	Bus Routes Leetcode Solution	6287
127	Decode String Leetcode Solution	6273
128	Merge Two Sorted Lists Leetcode Solutions	6257
129	Number of Provinces Leetcode Solution	6245
130	Pascal Triangle Leetcode	6242
131	H-Index Leetcode Solution	6238
132	Find the Row with Maximum Number of 1’s	6219
133	Linked List Cycle II LeetCode Solution	6180
134	Convert array into Zig-Zag fashion	6154
135	Minimum Cost For Tickets Leetcode Solution	6147
136	Minimum Steps to reach target by a Knight	6143
137	Defanging an IP Address Leetcode Solution	6114
138	Optimal Account Balancing LeetCode Solution	6112
139	Prefix to Infix Conversion	6102
140	Employee Free Time LeetCode Solution	6099
141	Pascal’s Triangle II Leetcode Solution	6004
142	Find First and Last Position of Element in Sorted Array Leetcode Solution	5974
143	First element occurring k times in an array	5974
144	Increasing Triplet Subsequence LeetCode Solution	5957
145	Build Array From Permutation Leetcode Solution	5935
146	Implementation of Deque using Doubly Linked List	5911
147	Merge Sorted Array LeetCode Solution	5907
148	Majority Element II Leetcode Solution	5892
149	Island Perimeter Leetcode Solution	5870
150	Robot Room Cleaner Leetcode Solution	5869
151	Bellman Ford Algorithm	5836
152	Max Consecutive Ones Leetcode Solution	5801
153	Find Pair with Given Difference	5783
154	Swap Nodes in Pairs Leetcode Solutions	5782
155	Check if the Elements of an Array are Consecutive	5763
156	OSI Model	5747
157	Guess Number Higher or Lower LeetCode Solution	5738
158	K-th Smallest Element in a Sorted Matrix	5738
159	Add Two Numbers II Leetcode Solution	5704
160	Set Matrix Zeroes Leetcode Solution	5703
161	Fibonacci Number LeetCode Solution	5698
162	KMP Algorithm	5689
163	First negative integer in every window of size k	5674
164	Find the Missing Number	5663
165	Subarray Sum Equals K LeetCode Solution	5662
166	Design Parking System Leetcode Solution	5661
167	Lemonade Change Leetcode Solution	5645
168	Trapping Rain Water Leetcode Solution	5644
169	Delete middle element of a stack	5621
170	First Unique Character in a String LeetCode Solution	5600
171	Word Ladder LeetCode Solution	5587
172	Coin Change 2 Leetcode Solution	5580
173	Subarray Product Less Than K LeetCode Solution	5576
174	Find All Duplicates in an Array LeetCode Solution	5569
175	String Compression	5559
176	Length of the largest subarray with contiguous elements	5555
177	Monotonic Array LeetCode Solution	5543
178	Capacity To Ship Packages Within D Days Leetcode Solution	5538
179	Last Stone Weight	5535
180	Subarray with Given Sum	5529
181	Palindrome Linked List Leetcode Solution	5525
182	Find Smallest Missing Number in a Sorted Array	5460
183	Repeated Substring Pattern	5453
184	Form Minimum Number from Given Sequence of D’s and I’s	5444
185	Combinations Leetcode Solution	5424
186	Remove Duplicates from Sorted List II LeetCode Solution	5412
187	01 Matrix LeetCode Solution	5412
188	Single Element in a Sorted Array LeetCode Solution	5385
189	Prefix to Postfix Conversion	5360
190	Reverse Words in a String III LeetCode Solution	5345
191	Valid Perfect Square Leetcode Solution	5340
192	Continuous Subarray Sum LeetCode Solution	5339
193	Same Tree LeetCode Solution	5314
194	Iterative Implementation of Quick Sort	5312
195	Break a Palindrome LeetCode Solution	5280
196	Combination Sum	5280
197	Remove Linked List Elements Leetcode Solution	5250
198	Merge k Sorted Lists Leetcode Solution	5248
199	Leetcode Permutations	5227
200	Slowest Key Leetcode Solution	5224
201	Relative Ranks Leetcode Solution	5203
202	Backspace String Compare	5194
203	Top K Frequent Elements LeetCode Solution	5173
204	Rotate List Leetcode Solution	5156
205	Maximum Product of Three Numbers LeetCode Solution	5148
206	Insert Delete GetRandom O(1) Leetcode Solution	5145
207	Find Peak Element LeetCode Solution	5124
208	Find the Duplicate Element	5117
209	Container With Most Water LeetCode Solution	5110
210	The K Weakest Rows in a Matrix Leetcode Solution	5104
211	Printing brackets in Matrix Chain Multiplication Problem	5060
212	Contains Duplicate LeetCode Solution	5050
213	Longest Common Subsequence LeetCode Solution	5041
214	Cuckoo sequence program	5039
215	Second Most Repeated Word in a Sequence	5020
216	Kth Largest Element in a Stream Leetcode Solution	5018
217	Palindrome Number	5006
218	Remove All Occurrences of a Substring LeetCode Solution	4984
219	Make The String Great Leetcode Solution	4974
220	Relative Sort Array Leetcode Solution	4968
221	Subarray Sum Equals k	4965
222	Permutation in String Leetcode Solution	4964
223	Rearrange given Array in Maximum Minimum Form	4954
224	Max Area of Island	4948
225	Unique Paths II Leetcode Solution	4942
226	Convert a Number to Hexadecimal Leetcode Solution	4918
227	Generate all Binary Strings Without Consecutive 1’s	4914
228	Delete Node in a Linked List Leetcode Solution	4907
229	Arithmetic Expression Evaluation	4903
230	Find Leaders in an Array	4903
231	Target Sum	4887
232	Construct Binary Tree from Given Inorder and Preorder Traversals	4877
233	Check If Two String Arrays are Equivalent Leetcode Solution	4872
234	N-Queens LeetCode Solution	4858
235	Time Based Key-Value Store LeetCode Solution	4858
236	Moving Average from Data Stream Leetcode Solution	4846
237	Scramble String	4840
238	Number of Dice Rolls With Target Sum LeetCode Solution	4819
239	Count Good Nodes in Binary Tree Leetcode Solution	4819
240	LRU Cache LeetCode Solution	4811
241	Next Permutation	4808
242	Letter Combinations of a Phone Number	4806
243	Given two unsorted arrays find all pairs whose sum is x	4789
244	Find N Unique Integers Sum up to Zero Leetcode Solution	4786
245	Check If N and Its Double Exist Leetcode Solution	4780
246	Stone Game LeetCode	4751
247	Find Triplet in Array With a Given Sum	4751
248	Number of Steps to Reduce a Number to Zero Leetcode Solution	4723
249	Flipping an Image LeetCode Solution	4717
250	Minimum swaps required to bring all elements less than or equal to k together	4712
251	Prim’s Algorithm	4704
252	Reverse Only Letters LeetCode Solution	4698
253	Stock Buy Sell to Maximize Profit	4669
254	Remove Minimum Characters so that Two Strings Become Anagrams	4665
255	Min Cost Climbing Stairs LeetCode Solution	4661
256	Find The Duplicate Number	4650
257	Top K Frequent Elements	4649
258	Minimum Knight Moves LeetCode Solution	4638
259	Student Attendance Record I Leetcode Solution	4638
260	Min Stack	4609
261	To Lower Case Leetcode Solution	4582
262	Smallest Positive Number Missing in an Unsorted Array	4571
263	The kth Factor of n Leetcode Solution	4568
264	Minimum Operations to convert X to Y	4565
265	License Key Formatting Leetcode Solution	4543
266	Reverse words in a string	4541
267	Maximum Sum Increasing Subsequence	4539
268	Maximum Subarray Sum using Divide and Conquer	4532
269	Single Number	4523
270	Maximum Population Year LeetCode Solution	4503
271	Search Suggestions System LeetCode Solution	4471
272	Remove Nth Node From End of List Leetcode Solution	4455
273	Top K Frequent Words LeetCode Solution	4451
274	Longest Common Subsequence	4442
275	Special Array With X Elements Greater Than or Equal X Leetcode Solution	4440
276	Reformat Date LeetCode Solution	4438
277	Find Words That Can Be Formed by Characters Leetcode Solution	4428
278	Find the Number Occurring Odd Number of Times in an Array	4426
279	Sum of Subarray Ranges Leetcode Solution	4423
280	Boolean Parenthesization Problem	4407
281	Minimum Path Sum Leetcode Solution	4380
282	Maximum Depth of Binary Tree Leetcode Solution	4362
283	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	4360
284	BFS for Disconnected Graph	4355
285	Reveal Cards In Increasing Order Leetcode Solution	4349
286	N-th Tribonacci Number Leetcode Solution	4342
287	Intersection of Two Arrays	4313
288	Reverse individual words	4311
289	House Robber	4296
290	Diagonal Traverse LeetCode Solution	4289
291	Minimum Characters to be Added at Front to Make String Palindrome	4289
292	Last Stone Weight II LeetCode Solution	4280
293	Evaluate Division	4277
294	Remove Duplicates from Sorted List LeetCode Solution	4275
295	Maximize Distance to Closest Person LeetCode Solution	4270
296	Best Time to Buy and Sell Stock III Leetcode Solution	4266
297	Find any one of the multiple repeating elements in read only array	4256
298	Binary Tree Inorder Traversal LeetCode Solution	4250
299	Design A Leaderboard Leetcode Solution	4246
300	Find if Path Exists in Graph Leetcode Solution	4244
301	Count Number of Occurrences in a Sorted Array	4237
302	Count of index pairs with equal elements in an array	4231
303	Sort Elements by Frequency of Occurrences	4229
304	Length of Longest valid Substring	4219
305	Maximum Size Subarray Sum Equals k Leetcode Solution	4214
306	Most Frequent Element in an Array	4187
307	Range Sum Query 2D – Immutable Leetcode Solution	4178
308	Minimum number of Merge Operations to make an Array Palindrome	4177
309	Reverse Nodes in k-Group LeetCode Solution	4164
310	Implement a stack using single queue	4163
311	Brightest Position on Street LeetCode Solution	4141
312	Mobile Numeric Keypad Problem	4137
313	Find the Closest Palindrome number	4130
314	Sudoku Solver	4127
315	Find Leaves of Binary Tree LeetCode Solution	4123
316	Remove All Ones With Row and Column Flips Leetcode Solution	4118
317	Reverse Bits	4101
318	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	4099
319	Spiral Matrix II Leetcode Solution	4090
320	Invalid Transactions LeetCode Solution	4086
321	Partition Array Into Three Parts With Equal Sum Leetcode Solution	4082
322	Special Positions in a Binary Matrix Leetcode Solution	4077
323	Symmetric Tree Leetcode Solution	4058
324	Shortest Word Distance Leetcode Solution	4056
325	Split Linked List in Parts Leetcode Solution	4043
326	Sort Array By Parity II Leetcode Solution	4043
327	Paint House LeetCode Solution	4042
328	Maximum Subarray	4041
329	Diagonal Traversal LeetCode Solution	4021
330	Arrange given Numbers to Form the Biggest Number II	4018
331	One Edit Distance LeetCode Solution	4010
332	Find Duplicates in an Array in Most Efficient Way	3993
333	Remove Invalid Parentheses Leetcode Solution	3984
334	Largest Rectangle in Histogram LeetCode Solution	3982
335	Jump Game	3972
336	Rank Transform of an Array Leetcode Solution	3969
337	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3965
338	Round Robin Scheduling	3963
339	Dijkstra Algorithm	3961
340	Unique Paths	3958
341	Hamming Distance Leetcode Solution	3951
342	Partition Labels LeetCode Solution	3950
343	Minimum Moves to Equal Array Elements Leetcode Solution	3936
344	Alien Dictionary LeetCode Solution	3935
345	Maximal Square	3918
346	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3904
347	Construct BST from its given Level Order Traversal	3904
348	String Matching in an Array Leetcode Solution	3902
349	Range Sum of BST LeetCode Solution	3901
350	Find Winner on a Tic Tac Toe Game Leetcode Solution	3900
351	Tug of War	3894
352	Bitwise AND of Numbers Range LeetCode Solution	3893
353	Minimum operation to make all elements equal in array	3891
354	Next Permutation LeetCode Solution	3886
355	The Celebrity Problem	3880
356	Minimum Depth of Binary Tree Leetcode Solution	3878
357	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3877
358	Least Number of Unique Integers after K Removals Leetcode Solution	3874
359	Pair of Positive Negative Values in an Array	3856
360	Longest Common Prefix using Trie	3853
361	Merge Two Sorted Linked Lists	3849
362	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3836
363	Maximum Circular Subarray Sum	3834
364	Smallest Subarray with k Distinct Numbers	3829
365	Given an Array of Pairs Find all Symmetric Pairs in it	3827
366	Minimum Time Visiting All Points Leetcode Solution	3825
367	Postfix to Prefix Conversion	3824
368	Unique Paths III LeetCode Solution	3820
369	Check whether Strings are K Distance Apart or Not	3820
370	Transpose Graph	3816
371	Minimum Cost to Hire K Workers	3815
372	K Empty Slots LeetCode	3813
373	Validate Stack Sequences LeetCode Solution	3804
374	Clone Graph LeetCode Solution	3802
375	Robot Bounded In Circle LeetCode Solution	3798
376	Count of Triplets With Sum Less than Given Value	3797
377	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3794
378	Find minimum difference between any two elements	3785
379	Next Greater Element III LeetCode Solution	3783
380	Check if a given array contains duplicate elements within k distance from each other	3781
381	Substring with Concatenation of All Words Leetcode Solution	3780
382	Ugly Number II LeetCode Solution	3771
383	Invert Binary Tree LeetCode Solution	3769
384	Regular Expression Matching Regular Expression Matching LeetCode Solution	3764
385	Sort a stack using a temporary stack	3763
386	Implementation of Deque using circular array	3759
387	Longest Substring with At Most K Distinct Characters LeetCode Solution	3757
388	Minimize Maximum Pair Sum in Array LeetCode Solution	3756
389	Kruskal Algorithm	3750
390	Recursion	3742
391	Invert Binary Tree LeetCode Solution	3740
392	Permutation Sequence LeetCode Solution	3732
393	Non-decreasing Array LeetCode Solution	3727
394	Graph Valid Tree LeetCode Solution	3720
395	Design Browser History LeetCode Solution	3708
396	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3706
397	Sliding Window Technique	3703
398	LRU Cache Implementation	3701
399	Find the subarray with least average	3699
400	Word Search	3699
401	Missing Element in Sorted Array LeetCode Solution	3695
402	Kth Smallest Element in a BST Leetcode Solution	3694
403	Toeplitz Matrix	3686
404	Longest subsequence such that difference between adjacents is one	3685
405	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3684
406	Stack Permutations (Check if an array is stack permutation of other)	3684
407	Find the Smallest Divisor given a Threshold Leetcode Solution	3679
408	Longest subarray not having more than K distinct elements	3679
409	Find duplicates in a given array when elements are not limited to a range	3676
410	Partition List Leetcode Solution	3670
411	Find the First and Second Smallest Elements	3670
412	Path With Maximum Minimum Value LeetCode Solution	3669
413	3 Sum	3664
414	Number of Islands II LeetCode Solution	3654
415	Common elements in all rows of a given matrix	3653
416	Stone Game II Leetcode	3653
417	Find Top K (or Most Frequent) Numbers in a Stream	3652
418	K Closest Points to Origin Leetcode Solution	3645
419	Max stack	3641
420	Find Maximum Level sum in Binary Tree	3638
421	First Circular Tour to Visit all the Petrol Bunks	3636
422	Queries for counts of array elements with values in given range	3634
423	Number Complement Leetcode Solution	3631
424	Sequences of given length where every element is more than or equal to twice of previous	3626
425	Combination Sum IV LeetCode Solution	3624
426	Number of Smaller Elements on Right Side	3622
427	Maximum Number of Occurrences of a Substring Leetcode Solution	3619
428	Integer Break LeetCode Solution	3618
429	Search a 2D Matrix II Leetcode Solution	3617
430	Snakes and Ladders LeetCode Solution	3615
431	Minesweeper LeetCode Solution	3614
432	Top View of Binary Tree	3614
433	Priority Queue using doubly linked list	3610
434	Nth Catalan Number	3591
435	LRU Cache Leetcode Solution	3590
436	Painting Fence Algorithm	3588
437	Find the Peak Element from an Array	3588
438	Can Make Arithmetic Progression From Sequence Leetcode Solution	3580
439	Odd Even Linked List Leetcode Solution	3579
440	Sort elements by frequency	3571
441	Longest Palindrome can be Formed by Removing or Rearranging Characters	3571
442	Find Minimum in Rotated Sorted Array II LeetCode Solution	3564
443	Insert Interval Leetcode Solution	3564
444	High Five LeetCode Solution	3562
445	Check if Two given Strings are Isomorphic to each other	3557
446	Rearrange array such that even positioned are greater than odd	3549
447	Flood Fill LeetCode	3543
448	Maximum Consecutive Numbers Present in an Array	3540
449	Search in a Binary Search Tree Leetcode Solution	3535
450	Consecutive Characters LeetCode Solution	3532
451	Shortest Palindrome	3524
452	Sliding Window Maximum LeetCode Solution	3518
453	Distance of nearest cell having 1 in a binary matrix	3518
454	Design a stack that supports getMin() in O(1) time and O(1) extra space	3504
455	4Sum	3504
456	Fibonacci Number LeetCode Solution	3499
457	Tiling Problem	3495
458	Expression Contains Redundant Bracket or Not	3491
459	Move All the Zeros to the End of the Given Array	3489
460	Count items common to both the lists but with different prices	3485
461	Spiral Matrix III LeetCode Solution	3478
462	Minimum Absolute Difference in BST Leetcode Solution	3477
463	Replace Elements with Greatest Element on Right Side Leetcode Solution	3474
464	Number of Closed Islands Leetcode Solution	3473
465	Gold Mine Problem	3470
466	Find a Peak Element II LeetCode Solution	3463
467	Kth Non-repeating Character	3463
468	Check If Array Pairs Are Divisible by k LeetCode Solution	3462
469	Insert into a Binary Search Tree Leetcode Solution	3459
470	Decompress Run-Length Encoded List Leetcode Solution	3457
471	Integer to English words	3453
472	Queries for GCD of all numbers of an array except elements in a given range	3446
473	Restore IP Addresses Leetcode Solution	3438
474	Minimum Path Sum	3438
475	N queen problem	3438
476	Evaluate Reverse Polish Notation LeetCode Solution	3437
477	Trapping Rain Water LeetCode Solution	3435
478	Longest Common Prefix using Sorting	3432
479	Coin Change Problem	3432
480	Balanced Expression with Replacement	3427
481	Interval Tree	3420
482	Convert Sorted Array to Binary Search Tree Leetcode Solution	3414
483	Find All Possible Recipes from Given Supplies LeetCode Solution	3413
484	Sliding Window Median Leetcode Solution	3412
485	Sorting array using Stacks	3409
486	Binary Tree Maximum Path Sum LeetCode Solution	3406
487	Sort an array according to the order defined by another array	3401
488	Sort Colors	3391
489	Cells with Odd Values in a Matrix LeetCode Solution	3390
490	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	3381
491	Majority Element	3380
492	Best Time to Buy and Sell Stock	3376
493	Find Pythagorean Triplets from Array	3373
494	Vertical Order Traversal of Binary Tree LeetCode Solution	3370
495	Palindrome Substring Queries	3370
496	Number of Days Between Two Dates LeetCode Solution	3367
497	Reverse a linked list	3365
498	Priority Queue in C++	3362
499	Path Sum II LeetCode Solution	3347
500	The Stock Span Problem	3345
501	Subset sum problem	3345
502	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	3344
503	Find Median from Data Stream LeetCode Solution	3338
504	Queue using Stacks	3325
505	Is Graph Bipartite? LeetCode Solution	3322
506	Camelcase Matching Leetcode Solution	3318
507	Largest rectangular sub-matrix whose sum is 0	3315
508	Intersection of Two Linked Lists LeetCode Solution	3311
509	Sieve of Eratosthenes	3306
510	Design Hit Counter LeetCode Solution	3304
511	How to Implement Stack Using Priority Queue or Heap?	3304
512	Kth ancestor of a node in binary tree	3302
513	Find the first Repeating Number in a Given Array	3302
514	Custom Sort String Leetcode Solution	3299
515	Fibonacci numbers	3299
516	Pancake Sorting Problem	3295
517	Different Ways to Add Parentheses Leetcode Solution	3293
518	Multiplication of Two Matrices	3284
519	Analyze User Website Visit Pattern LeetCode Solution	3282
520	Divide Chocolate LeetCode Solution	3280
521	Longest Increasing Path in a Matrix LeetCode Solution	3277
522	Shortest Completing Word Leetcode Solution	3276
523	Path Crossing Leetcode Solution	3267
524	Scramble String LeetCode Solution	3264
525	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	3263
526	Count Submatrices With All Ones LeetCode Solution	3256
527	Perfect Squares LeetCode Solution	3255
528	Count subarrays having total distinct elements same as original array	3250
529	Find a Fixed Point in a Given Array	3250
530	Group Anagrams	3249
531	Monotonic Array Leetcode Solution	3247
532	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	3247
533	Check if Array Contains Contiguous Integers With Duplicates Allowed	3246
534	Implement Trie (Prefix Tree) Leetcode Solution	3234
535	Queue based approach for first non-repeating character in a stream	3229
536	Detect a loop in the Linked List	3228
537	Shifting Letters LeetCode Solution	3217
538	Number of Distinct Islands Leetcode Solution	3206
539	Merge Overlapping Intervals	3206
540	Minimum Height Trees	3206
541	Reorder Data in Log Files LeetCode Solution	3205
542	Construction of Longest Increasing Subsequence (N log N)	3200
543	How to Create Mergable Stack?	3199
544	Generate all Binary Strings from Given Pattern	3195
545	Nearest Exit from Entrance in Maze LeetCode Solution	3194
546	Champagne Tower LeetCode Solution	3190
547	Valid Boomerang Leetcode Solution	3190
548	Race Car LeetCode Solution	3184
549	Longest Common Prefix using Divide and Conquer	3184
550	Decode Ways	3173
551	Implement strStr() LeetCode Solution	3171
552	Insert Node in the Sorted Linked List	3171
553	Sort a stack using recursion	3170
554	Find the Lost Element From a Duplicated Array	3170
555	Maximum Sum of Non Consecutive Elements	3169
556	Binary Tree zigzag level order Traversal	3164
557	Sliding Window Maximum	3163
558	Maximum Element in an Array which is Increasing and then Decreasing	3156
559	Find if an Expression has Duplicate Parenthesis or Not	3150
560	Morris Traversal	3148
561	First missing positive	3148
562	Most Stones Removed with Same Row or Column LeetCode Solution	3146
563	Number of Equivalent Domino Pairs Leetcode Solution	3140
564	Recover Binary Search Tree	3140
565	Palindrome Permutation LeetCode Solution	3136
566	Build an Array With Stack Operations Leetcode Solution	3136
567	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	3134
568	Count Possible Triangles	3133
569	LCS (Longest Common Subsequence) of three strings	3128
570	Find a Sorted Subsequence of size 3	3128
571	Smallest Good Base	3123
572	Best Time to Buy and Sell Stock IV LeetCode Solution	3122
573	Find maximum length Snake sequence	3122
574	Merge Two Binary Trees LeetCode Solution	3121
575	Rectangle Overlap LeetCode Solution	3117
576	Decode String	3116
577	Design Skiplist LeetCode Solution	3114
578	Letter Case Permutation	3110
579	Minimum Bracket Reversals	3107
580	Contiguous Array LeetCode Solution	3101
581	Longest Substring with At Least K Repeating Characters LeetCode Solution	3100
582	Palindrome Partitioning Leetcode Solution	3094
583	Minimum Height Trees LeetCode Solution	3093
584	Recover Binary Search Tree Leetcode Solution	3092
585	Distance Between Bus Stops Leetcode Solution	3090
586	Guess Number Higher or Lower II	3090
587	Print all Palindromic Partitions of a String	3087
588	All Possible Full Binary Trees LeetCode Solution	3077
589	Largest Subarray with Equal Number of 0’s and 1’s	3077
590	Minimum number of jumps to reach end	3074
591	Maximum Number of Ways to Partition an Array LeetCode Solution	3073
592	Longest Repeated Subsequence	3072
593	Maximum Depth of N-ary Tree Leetcode Solution	3069
594	Find the Town Judge LeetCode Solution	3068
595	Design a Stack With Increment Operation Leetcode Solution	3064
596	K-th Distinct Element in an Array	3060
597	Maximum Length of Chain Pairs	3055
598	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	3053
599	Find the two Numbers with Odd Occurrences in an Unsorted Array	3049
600	Reorder an Array According to the Given Indexes	3049
601	Check for Balanced Parentheses in an Expression	3035
602	Implement Two Stacks in an Array	3034
603	The Maze III LeetCode Solution	3032
604	Subarrays with K Different Integers Leetcode Solution	3021
605	Rearrange Spaces Between Words Leetcode Solution	3020
606	Sort a String According to Another String	3020
607	Mean of Array After Removing Some Elements Leetcode Solution	3018
608	Valid Parentheses Leetcode Solution	3015
609	Maximize Elements Using Another Array	3015
610	Maximum Score After Splitting a String Leetcode Solution	3014
611	Jump Game IV LeetCode Solution	3010
612	Maximum sum rectangle in a 2D matrix	3002
613	Count pair with Given Sum	2992
614	Contains Duplicate	2985
615	Minimum Jumps to Reach Home LeetCode Solution	2968
616	Perform String Shifts Leetcode	2964
617	Convert BST to Min Heap	2963
618	Word Break	2963
619	Valid Sudoku	2961
620	Possible Bipartition LeetCode Solution	2954
621	Edit Distance LeetCode Solution	2949
622	Find the First Circular Tour that visits all the Petrol Pumps	2948
623	Palindrome Permutations of a String	2947
624	Iterative Method to find Height of Binary Tree	2943
625	Find the Minimum Element in a Sorted and Rotated Array	2941
626	A Space Optimized DP solution for 0-1 Knapsack Problem	2938
627	Heap Sort	2933
628	Reach a Number LeetCode Solution	2926
629	Maximum Product of Splitted Binary Tree LeetCode Solution	2916
630	Best Meeting Point LeetCode Solution	2913
631	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2911
632	Find Largest Value in Each Tree Row LeetCode Solution	2910
633	Merge Two Balanced Binary Search Trees	2908
634	Count Sub Islands LeetCode Solution	2897
635	Palindromic Substrings Leetcode Solution	2897
636	Number of palindromic paths in a matrix	2889
637	Merge Overlapping Intervals II	2886
638	Sorted Linked List to Balanced BST	2885
639	Brick Wall LeetCode Solution	2877
640	My Calendar I LeetCode Solution	2877
641	Palindrome Permutation	2876
642	Find the Subarray of given length with Least Average	2876
643	Find First and Last Position of Element in Sorted Array LeetCode Solution	2875
644	Segregate 0s and 1s in an Array	2874
645	All Unique Triplets that Sum up to a Given Value	2871
646	Caesar Cipher	2868
647	Swapping Nodes in a Linked List Leetcode Solution	2862
648	Check if the given array can represent Level Order Traversal of Binary Search Tree	2859
649	Construct BST from given Preorder Traversal	2857
650	Huffman Coding	2851
651	Level order Traversal in Spiral Form	2849
652	Find Median from data Stream	2849
653	Pair with given product	2839
654	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2833
655	Partition Problem	2831
656	Word Pattern	2826
657	Maximize Sum of Array after K Negations Leetcode Solution	2822
658	Merge K Sorted Arrays and Print Sorted Output	2819
659	Find all triplets with zero sum	2810
660	Validate Binary Search Tree	2806
661	Count Distinct Elements in Every Window of Size K	2785
662	Isomorphic Strings LeetCode Solution	2784
663	Print Fibonacci sequence using 2 variables	2784
664	Find whether a subarray is in form of a mountain or not	2784
665	Maximum Frequency Stack Leetcode Solution	2781
666	Count Good Nodes in Binary Tree LeetCode Solution	2778
667	Bubble sort using two Stacks	2777
668	Detect Capital Leetcode Solution	2774
669	Minimum time required to rot all oranges	2773
670	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2772
671	Find all pairs (a, b) in an array such that a % b = k	2772
672	Queries on Probability of Even or Odd Number in given Ranges	2771
673	Add two numbers	2771
674	Counting Bits	2765
675	Longest Subarray Having Count of 1s One More than Count of 0s	2762
676	Range Sum Query 2D – Immutable LeetCode Solution	2760
677	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2760
678	Convert Sorted List to Binary Search Tree	2758
679	Alien Dictionary	2758
680	How to Efficiently Implement k Stacks in a Single Array?	2753
681	Binary Tree Right Side View LeetCode Solution	2749
682	Split Array Into Consecutive Subsequences	2748
683	Largest Sum Contiguous Subarray	2746
684	Find four elements that sum to a given value (Hashmap)	2745
685	Sort 0s 1s and 2s in an Array	2742
686	Length of Longest Fibonacci Subsequence	2740
687	Binary Tree to Binary Search Tree Conversion	2738
688	Breadth First Search (BFS) for a Graph	2735
689	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2734
690	Rotate Array	2731
691	Remove brackets from an algebraic string containing + and – operators	2730
692	Minimum Swaps to Group All 1’s Together Leetcode Solution	2724
693	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2723
694	Partition to K Equal Sum Subsets Leetcode Solution	2721
695	Print all subarrays with 0 sum	2715
696	Count ways to reach the nth stair using step 1, 2 or 3	2712
697	Maximum Number of Chocolates to be Distributed Equally Among k Students	2711
698	Merge Two Sorted Lists Leetcode	2700
699	Populating Next Right Pointers in Each Node Leetcode Solution	2695
700	Remove Palindromic Subsequences Leetcode Solution	2692
701	Populating Next Right Pointers in Each Node	2692
702	String comparison containing wildcards	2682
703	Find pairs with given sum such that elements of pair are in different rows	2681
704	Partition Equal Subset Sum	2680
705	Arithmetic Slices II – Subsequence LeetCode Solution	2677
706	Difference Array \| Range update query in O(1)	2669
707	Happy Number	2669
708	Topological Sorting	2664
709	Web Crawler LeetCode Solution	2663
710	Remove duplicates from sorted array	2662
711	Concatenation of Array LeetCode Solution	2656
712	Minimum Sum Path in a Triangle	2655
713	Queue Reconstruction by Height	2652
714	Inorder Successor of a node in Binary Tree	2649
715	Elements Appear more than N/K times in Array	2647
716	Check if a Linked list of Strings form a Palindrome	2639
717	Contiguous Array Leetcode	2636
718	Find All Pairs With a Given Difference	2635
719	Reverse Nodes in K-Group	2631
720	Find Duplicate Subtrees	2626
721	Root to Leaf path with target sum Leetcode Solutions	2625
722	Increasing Subsequence of Length three with Maximum Product	2612
723	Check if String Follows Order of Characters by a Pattern or not	2611
724	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2598
725	Swap Kth Node from beginning with Kth Node from End	2594
726	Longest Common Prefix Using Binary Search II	2590
727	Container with Most Water	2581
728	Climbing stairs	2579
729	Maximum Product Subarray II	2577
730	Score of Parenthesis LeetCode Solution	2576
731	Minimum Swaps to Make Strings Equal Leetcode Solution	2575
732	Count Minimum Steps to Get the given Array	2572
733	Finding K closest element	2570
734	Maximum Distance in Array	2569
735	Symmetric Tree	2567
736	Given a binary tree, how do you remove all the half nodes?	2565
737	Pancake Sorting	2564
738	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2557
739	Sum Root to Leaf Numbers LeetCode Solution	2551
740	Parallel Courses II LeetCode Solution	2550
741	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2550
742	An Interesting Method to generate Binary Numbers from 1 to n	2548
743	Deletion in a Binary Tree	2545
744	Check if all levels of two Binary Tree are anagrams or not	2543
745	Delete Nodes and Return Forest Leetcode Solution	2540
746	Construct Binary Tree from given Parent Array representation	2539
747	Longest Increasing Subsequence	2536
748	Find the first repeating element in an array of integers	2532
749	Substring With Concatenation Of All Words	2527
750	Delete Nth node from the end of the given linked list	2523
751	Count pairs from two linked lists whose sum is equal to a given value	2523
752	Boundary Traversal of binary tree	2521
753	Union and Intersection of two Linked Lists	2519
754	Kill Process LeetCode Solution	2516
755	MiniMax Algorithm	2516
756	Sort Array by Increasing Frequency Leetcode Solution	2509
757	Iterative Depth First Traversal of Graph	2508
758	Level order traversal using two Queues	2507
759	BFS vs DFS for Binary Tree	2506
760	Linked List Cycle	2505
761	Level of Each node in a Tree from source node	2505
762	Find K Closest Elements LeetCode Solution	2502
763	Minimum Size Subarray Sum	2499
764	Merge K Sorted Linked Lists	2497
765	Iterative Preorder Traversal	2488
766	Non-overlapping sum of two sets	2488
767	Valid Anagrams	2487
768	Minimum Remove to Make Valid Parentheses LeetCode Solution	2483
769	Find Maximum of Minimum for Every Window Size in a Given Array	2483
770	Rearrange an Array Such that arr[i] is equal to i	2482
771	Longest Common Prefix Word by Word Matching	2482
772	Nested List Weight Sum II LeetCode Solution	2469
773	Find the Difference Leetcode Solution	2465
774	Remove Duplicates from Sorted List II	2462
775	New 21 Game	2461
776	Matrix Chain Multiplication	2460
777	Merging Intervals	2460
778	Verify Preorder Serialization of a Binary Tree	2455
779	Check if a queue can be sorted into another queue using a stack	2451
780	Super Ugly Number	2450
781	Friends Of Appropriate Ages LeetCode Solution	2446
782	Maximum size subarray sum equals k	2444
783	Reservoir Sampling	2442
784	Flatten Binary Tree to Linked List LeetCode Solution	2438
785	Maximum Product Subarray	2435
786	Range LCM Queries	2432
787	Smallest Range II Leetcode Solution	2427
788	Print a Binary Tree in Vertical Order	2426
789	Palindrome Partitioning	2423
790	Reorder Array Using Given Indexes	2421
791	Balanced Binary Tree	2420
792	K maximum sums of overlapping contiguous sub-arrays	2415
793	Sum of f(a[i], a[j]) over all pairs in an array of n integers	2408
794	Missing Number	2407
795	Valid Triangle Number LeetCode Solution	2398
796	Vertical sum in a given binary tree	2397
797	Check if Two Expressions With Brackets are Same	2397
798	Defanging an IP Address LeetCode Solution	2391
799	Peak Index in a Mountain Array LeetCode Solution	2390
800	Check if any two intervals overlap among a given set of intervals	2389
801	Maximum difference between two elements such as larger element comes after smaller	2387
802	Create Maximum Number	2386
803	Minimum insertions to form a palindrome with permutations allowed	2380
804	Find Maximum Sum Possible Equal Sum of Three Stacks	2379
805	Minimum Distance Between BST Nodes Leetcode Solution	2372
806	Lowest Common Ancestor	2368
807	The Painter’s Partition Problem	2367
808	Find subarray with given sum (Handles Negative Numbers)	2364
809	Sorting a K Sorted Array	2361
810	Unique Binary Search Trees LeetCode Solution	2360
811	Check if a given array can represent Preorder Traversal of Binary Search Tree	2358
812	Find Three Element From Different Three Arrays Such That a + b + c = sum	2358
813	Number Of Longest Increasing Subsequence	2355
814	Valid Triangle Number LeetCode Solution	2354
815	Employee Importance LeetCode Solution	2351
816	Count number of triplets with product equal to given number	2351
817	Largest Submatrix With Rearrangements LeetCode Solution	2346
818	Flatten 2D Vector LeetCode Solution	2345
819	Find K Length Subarray of Maximum Average	2340
820	Hamming Distance	2339
821	Check Completeness of a Binary Tree LeetCode Solution	2335
822	Kth Smallest Element in a Sorted Matrix LeetCode Solution	2331
823	Array Nesting Leetcode Solution	2331
824	Iterative Postorder Traversal Using Two Stacks	2330
825	Closest Leaf in a Binary Tree LeetCode Solution	2329
826	Check if two nodes are on the same path in a Tree	2328
827	Merging Two Sorted Arrays	2327
828	Find Peak Element	2323
829	Third Maximum Number Leetcode Solution	2322
830	Find Common Characters Leetcode Solution	2321
831	First Bad Version	2318
832	Find distance between two nodes of a Binary Tree	2317
833	Tree Traversal (Preorder, Inorder & Postorder)	2315
834	Print All Distinct Elements of a Given Integer Array	2311
835	Valid Parenthesis String	2307
836	Find Element Using Binary Search in Sorted Array	2304
837	Products of ranges in an array	2300
838	Maximum difference between frequency of two elements such that element having greater frequency is also greater	2299
839	Maximum subsequence sum such that no three are consecutive	2299
840	Find Smallest Range Containing Elements from k Lists	2298
841	Newman-Conway Sequence	2298
842	Diagonal Traversal of Binary Tree	2297
843	Largest BST Subtree LeetCode Solution	2294
844	Print all triplets in sorted array that form AP	2293
845	Sort Elements by Frequency II	2293
846	Distinct Subsequences	2289
847	Find Sum of all unique sub-array sum for a given array	2288
848	Arrange given numbers to form the biggest number	2286
849	Bottom View of a Binary Tree	2280
850	Lower Case To Upper Case	2280
851	Maximum number of segments of lengths a, b and c	2279
852	Longest Palindromic Subsequence	2275
853	Largest divisible pairs subset	2272
854	Range Sum Query using Sparse Table	2265
855	Stone Game IV LeetCode Solution	2264
856	Path Sum	2260
857	Largest subarray with equal number of 0s and 1s	2259
858	Compare Strings by Frequency of the Smallest Character Leetcode Solution	2258
859	Stone Game IV LeetCode Solution	2257
860	Find Nth Node	2257
861	Print Right View of a Binary Tree	2256
862	Number of siblings of a given Node in n-ary Tree	2256
863	Segment Tree	2251
864	Contiguous Array	2240
865	Trapping Rain Water II LeetCode Solution	2238
866	Find the largest multiple of 3	2238
867	Longest Bitonic Subsequence	2235
868	Four Elements that Sum to Given	2234
869	Binary array after M range toggle operations	2232
870	Shuffle an Array	2232
871	Median of Two Sorted Arrays	2231
872	Merge Two Sorted Arrays	2230
873	Isomorphic Strings	2228
874	Count and Say	2221
875	Unique Binary Search Trees	2219
876	Subset Sum Problem in O(sum) space	2211
877	Permutations of a Given String Using STL	2205
878	Minimum Swaps To Make Sequences Increasing LeetCode Solution	2194
879	Find Largest d in Array such that a + b + c = d	2194
880	Red-Black Tree Introduction	2191
881	Maximum Product Subarray	2190
882	Infix to Postfix	2189
883	Encoded String With Shortest Length LeetCode Solution	2187
884	Valid Number	2185
885	Maximum Sum of 3 Non-Overlapping Subarrays	2184
886	Find unique character in a string	2183
887	Averages of Levels in Binary Tree	2182
888	Next Greater Element in an Array	2181
889	Maximum Population Year LeetCode Solution	2180
890	Friends Pairing Problem	2179
891	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	2172
892	Transform a BST to Greater sum Tree	2172
893	Closest Binary Search Tree Value Leetcode Solution	2164
894	Valid Perfect Square LeetCode Solution	2164
895	Height of a generic tree from parent array	2164
896	Insert Delete GetRandom	2163
897	Count Primes in Ranges	2162
898	Orderly Queue LeetCode Solution	2158
899	Write a function to get the intersection point of two Linked Lists	2158
900	Binary Search Tree Delete Operation	2142
901	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	2141
902	The Number of Weak Characters in the Game LeetCode Solution	2139
903	Range Minimum Query (Square Root Decomposition and Sparse Table)	2137
904	Bold Words in String LeetCode Solution	2131
905	Shuffle a given Array	2131
906	Binary Tree Longest Consecutive Sequence LeetCode Solution	2123
907	Serialize and Deserialize Binary Tree	2121
908	Sentence Screen Fitting LeetCode Solution	2119
909	Edit Distance	2116
910	Minimum sum of squares of character counts in a given string after removing k characters	2111
911	Kth Smallest Number in Multiplication Table Leetcode Solution	2105
912	Diameter of N-Ary Tree LeetCode Solution	2099
913	Reorganize String	2098
914	Swap Nodes In Pairs	2096
915	Find Minimum In Rotated Sorted Array	2093
916	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	2092
917	Convert BST into a Min-Heap without using array	2090
918	Lowest Common Ancestor in Binary Search Tree	2086
919	Next greater element	2085
920	Integer to Roman	2084
921	Maximum Product Subarray	2080
922	Next Greater Element II LeetCode Solution	2069
923	K’th Largest Element in BST when modification to BST is not allowed	2065
924	Find the smallest binary digit multiple of given number	2055
925	Total Hamming Distance LeetCode Solution	2054
926	Advantages of BST over Hash Table	2052
927	K’th Largest element in BST using constant extra space	2050
928	Array Queries for multiply replacements and product	2048
929	Koko Eating Bananas LeetCode Solution	2038
930	Queries on XOR of greatest odd divisor of the range	2035
931	Best Meeting Point LeetCode Solution	2033
932	Write Code to Determine if Two Trees are Identical	2033
933	Serialize and Deserialize Binary Tree LeetCode Solution	2029
934	Check if an Array is Stack Sortable	2026
935	Constant time range add operation on an array	2024
936	Print n terms of Newman-Conway Sequence	2023
937	Longest Increasing Consecutive Subsequence	2022
938	Level Order Traversal of Binary Tree	2019
939	Number of Orders in the Backlog Leetcode Solution	2016
940	Image Overlap LeetCode Solution	2008
941	Maximum Sum Increasing Subsequence	2006
942	Reverse a Path in BST using Queue	2005
943	Range Queries for Longest Correct Bracket Subsequence	2003
944	Clone a Binary Tree with Random Pointers	2002
945	Power of Two	2002
946	Moving Stones Until Consecutive Leetcode Solution	1998
947	Greatest Sum Divisible by Three LeetCode Solution	1995
948	Check if X can give change to every person in the Queue	1991
949	Design Underground System Leetcode Solution	1990
950	Find minimum number of merge operations to make an array palindrome	1984
951	A program to check if a binary tree is BST or not	1982
952	Numbers with prime frequencies greater than or equal to k	1981
953	Find the node with minimum value in a Binary Search Tree	1981
954	Valid Tic-Tac-Toe State LeetCode Solution	1980
955	Insert into a Sorted Circular Linked List LeetCode Solution	1979
956	Count and Toggle Queries on a Binary Array	1975
957	Design Add and Search Words Data Structure LeetCode Solution	1970
958	Form minimum number from given sequence	1968
959	Check if each internal node of a BST has exactly one child	1965
960	Print Next Greater Number of Q queries	1965
961	Maximum Array from Two given Arrays Keeping Order Same	1961
962	Closest Binary Search Tree Value II LeetCode Solution	1959
963	Factorial Trailing Zeroes LeetCode Solution	1949
964	Check for Palindrome after every character replacement Query	1948
965	Count the Pairs at Same Distance as in English Alphabets	1946
966	Number of elements less than or equal to a given number in a given subarray	1944
967	Merge two BSTs with limited extra space	1939
968	Queries for Decimal Values of Subarrays of a Binary Array	1938
969	Collect maximum points in a grid using two traversals	1937
970	Largest Plus Sign Leetcode Solution	1933
971	Graph Cloning	1926
972	Merge Sort	1925
973	Maximum difference between first and last indexes of an element in array	1924
974	Group Shifted Strings Leetcode Solution	1920
975	Merge Sorted Array	1919
976	Dividing Array into Pairs With Sum Divisible by K	1908
977	Priority Queue	1899
978	Longest Substring Without Repeating Characters Leetcode Solution	1894
979	Count even length binary sequences with same sum of first and second half bits	1889
980	Print modified array after multiple array range increment operations	1883
981	Print Ancestors of a Given Binary Tree Node Without Recursion	1880
982	Cutting a Rod	1871
983	Kth Smallest Element in a BST	1870
984	Form Minimum Number From Given Sequence	1859
985	Swim in Rising Water LeetCode Solution	1858
986	Excel Sheet Column Number LeetCode Solution	1858
987	Find maximum average subarray of k length	1853
988	Count Pairs Whose Products Exist in Array	1853
989	Guess The Word	1848
990	Unique Paths II	1842
991	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1841
992	Minimum Moves to Equal Array Elements LeetCode Solution	1841
993	Excel Sheet Column Title LeetCode Solution	1839
994	Binary Search Tree	1836
995	Print all Possible Ways to Break a String in Bracket Form	1831
996	How to print maximum number of A’s using given four keys	1823
997	Palindrome Partitioning	1822
998	Decrease Elements To Make Array Zigzag LeetCode Solution	1818
999	Check given array of size n can represent BST of n levels or not	1816
1000	Binary Search Tree Search and Insertion	1812
1001	K Empty Slots	1812
1002	Longest Common Prefix using Character by Character Matching	1806
1003	Sorted Array to Balanced BST	1794
1004	Regular Expression Matching	1794
1005	Sum of Left Leaves LeetCode Solution	1792
1006	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1781
1007	Find postorder traversal of BST from preorder traversal	1778
1008	Construct Complete Binary Tree from its Linked List Representation	1755
1009	Queries for Number of Distinct Elements in a Subarray	1737
1010	Maximum Depth Of Binary Tree	1737
1011	Maximum weight transformation of a given string	1733
1012	Find the Town Judge LeetCode Solution	1729
1013	Binary Tree to Binary Search Tree Conversion using STL set	1722
1014	Iterative method to find ancestors of a given binary tree	1718
1015	Symmetric Tree LeetCode Solution Leetcode Solution	1708
1016	Data Structure Designing	1700
1017	Shortest Unsorted Continuous Subarray LeetCode Solution	1699
1018	Random Pick Index LeetCode Solution	1690
1019	Search in Sorted Rotated Array	1680
1020	Find Maximum Depth of Nested Parenthesis in a String	1672
1021	Search an Element in Sorted Rotated Array	1653
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1622
1023	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1621
1024	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1611
1025	Next Greater Element I Leetcode Solution	1570
1026	Print Maximum Length Chain of Pairs	1566
1027	Maximum Binary Tree	1548
1028	Find k-th smallest element in BST (Order Statistics in BST)	1535
1029	Flatten Binary Tree to Linked List LeetCode Solution	1534
1030	Peeking Iterator LeetCode Solution	1499
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1475