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	38040
2	Maximum occurring character in a string	18439
3	Plus One Leetcode Solution	17435
4	Valid Parentheses LeetCode Solution	17076
5	3Sum Leetcode Solution	14856
6	First Repeating Element	13839
7	Single Number Leetcode Solution	13155
8	Count Primes Leetcode Solutions	12886
9	Merge Sorted Arrays Leetcode Solution	12493
10	Pow(x, n) Leetcode Solution	12484
11	Sqrt(x) Leetcode Solution	12283
12	Meeting Rooms II LeetCode Solution	11706
13	Concatenation of Array LeetCode Solution	11373
14	Roman to Integer Leetcode Solution	10639
15	Contains Duplicate II Leetcode Solution	10561
16	Palindrome Number LeetCode Solution	10369
17	Search Insert Position Leetcode Solution	10320
18	Valid Palindrome Leetcode Solution	10202
19	Reverse Vowels of a String Leetcode Solution	9846
20	Jump Game Leetcode Solution	9805
21	Intersection of Two Arrays II Leetcode Solution	9588
22	Number of Good Pairs Leetcode Solution	9544
23	Kids With the Greatest Number of Candies Leetcode Solution	9439
24	Spiral Matrix LeetCode Solution	9416
25	House Robber Leetcode Solution	9358
26	Longest Substring Without Repeating Characters LeetCode Solution	9290
27	Add Binary Leetcode Solution	9215
28	Find the Maximum Repeating Number in Array	9046
29	Text Justification LeetCode Solution	8900
30	Maximum Subarray Leetcode Solution	8682
31	Number Of 1 bits	8662
32	Longest Palindromic Substring LeetCode Solution	8650
33	Remove Duplicates from Sorted Array Leetcode Solution	8552
34	Jewels and Stones Leetcode Solution	8511
35	Power of Two Leetcode Solution	8431
36	Permutations Leetcode Solution	8361
37	Min Stack Leetcode Solution	8225
38	Shuffle String Leetcode Solution	8223
39	Find All Numbers Disappeared in an Array Leetcode Solution	8176
40	Move Zeroes LeetCode Solution	8098
41	Daily Temperatures Leetcode Solution	8037
42	Next Permutation Leetcode Solution	8005
43	Word Search Leetcode Solution	8000
44	Number of Islands LeetCode Solution	7979
45	Kth Missing Positive Number Leetcode Solution	7929
46	Maximum Profit in Job Scheduling Leetcode Solution	7903
47	Median of Two Sorted Arrays LeetCode Solution	7891
48	Longest Common Prefix Leetcode Solution	7858
49	Frog Jump Leetcode Solution	7819
50	Third Maximum Number Leetcode Solution	7757
51	Running Sum of 1d Array Leetcode Solution	7677
52	Find Minimum Distance Between Two Numbers in an Array	7635
53	Next Greater Element I Leetcode Solution	7613
54	Search in Rotated Sorted Array Leetcode Solution	7541
55	Can Place Flowers LeetCode Solution	7507
56	Rotate Image LeetCode Solution	7487
57	Shuffle the Array Leetcode Solution	7415
58	Multiply Strings Leetcode Solution	7404
59	Combination Sum Leetcode Solution	7393
60	Bulb Switcher LeetCode Solution	7349
61	3Sum Closest LeetCode Solution	7330
62	Valid Anagram Leetcode Solution	7254
63	House Robber II Leetcode Solution	7241
64	Count and Say Leetcode Solution	7220
65	Missing Number Leetcode Solution	7060
66	Subarray and Subsequence	7057
67	Evaluation of Postfix Expression	7028
68	Reverse String Without Temporary Variable	7009
69	Isomorphic Strings Leetcode Solution	6997
70	Strobogrammatic Number LeetCode Solution	6994
71	Excel Sheet Column Title Leetcode Solution	6959
72	Koko Eating Bananas Leetcode Solution	6952
73	Integer to Roman Leetcode Solution	6933
74	Product of array except self	6914
75	Count Pairs With Given Sum	6845
76	Rotate String LeetCode Solution	6839
77	Majority Element Leetcode Solution	6708
78	Happy Number Leetcode Solution	6668
79	Find the Difference Leetcode Solution	6658
80	String to Integer (atoi) LeetCode Solution	6642
81	Candy LeetCode Solution	6625
82	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	6609
83	Find Common Characters Leetcode Solution	6554
84	Largest Number Leetcode Solution	6543
85	Is Subsequence Leetcode Solution	6496
86	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	6434
87	Set Matrix Zeroes	6410
88	Balanced Binary Tree Leetcode Solution	6336
89	Best Time to Buy and Sell Stock LeetCode Solution	6306
90	Subset Leetcode	6303
91	Summary Ranges Leetcode Solution	6302
92	Word Pattern LeetCode Solution	6281
93	Find the Town Judge Leetcode Solution	6259
94	Unique Paths Leetcode Solution	6205
95	Arranging Coins Leetcode Solution	6148
96	Find the Duplicate Number LeetCode Solution	6146
97	Smallest window in a string containing all characters of another string	6144
98	Binary Search LeetCode Solution	6127
99	Sort Characters By Frequency LeetCode Solution	6115
100	Rearrange Positive and Negative Numbers Alternatively in Array	6112
101	Sort Colors LeetCode Solution	6095
102	Find the Winner of the Circular Game LeetCode Solution	6034
103	String Compression LeetCode Solution	6030
104	A Product Array Puzzle	6028
105	Asteroid Collision LeetCode Solution	6002
106	Repeated Substring Pattern LeetCode Solution	5978
107	Expression Evaluation	5954
108	Rabin Karp Algorithm	5949
109	Zigzag Conversion LeetCode Solution	5823
110	Best Time to Buy and Sell Stock II Leetcode Solution	5813
111	Valid Palindrome II Leetcode Solution	5803
112	Sort Array By Parity LeetCode Solution	5788
113	Sum of minimum and maximum elements of all subarrays of size k	5757
114	Group Anagrams LeetCode Solution	5756
115	Divide Two Integers Leetcode Solution	5723
116	Product of Array Except Self LeetCode Solution	5707
117	Reverse Integer Leetcode Solution	5701
118	Linked List Cycle II LeetCode Solution	5655
119	Page Replacement Algorithms in Operating Systems	5592
120	Bus Routes Leetcode Solution	5578
121	Merge Two Sorted Lists Leetcode Solutions	5545
122	Pascal Triangle Leetcode	5522
123	Matrix Chain Multiplication using Dynamic Programming	5520
124	Postfix to Infix Conversion	5511
125	Kth largest element in an Array Leetcode Solutions	5507
126	Employee Free Time LeetCode Solution	5494
127	Length of Last Word Leetcode Solution	5478
128	Assign Cookies Leetcode Solution	5465
129	Generate Parentheses Leetcode Solution	5445
130	Number of Provinces Leetcode Solution	5438
131	Minimum Cost For Tickets Leetcode Solution	5428
132	First element occurring k times in an array	5395
133	Remove Duplicates from Sorted Array II Leetcode Solution	5392
134	Minimum Steps to reach target by a Knight	5380
135	H-Index Leetcode Solution	5377
136	Decode String Leetcode Solution	5376
137	Optimal Account Balancing LeetCode Solution	5372
138	Build Array From Permutation Leetcode Solution	5367
139	Increasing Triplet Subsequence LeetCode Solution	5318
140	Convert array into Zig-Zag fashion	5304
141	Defanging an IP Address Leetcode Solution	5274
142	Implementation of Deque using Doubly Linked List	5256
143	Fibonacci Number LeetCode Solution	5200
144	Pascal’s Triangle II Leetcode Solution	5161
145	Robot Room Cleaner Leetcode Solution	5140
146	Swap Nodes in Pairs Leetcode Solutions	5108
147	Island Perimeter Leetcode Solution	5103
148	KMP Algorithm	5101
149	Bellman Ford Algorithm	5090
150	First Unique Character in a String LeetCode Solution	5041
151	Prefix to Infix Conversion	5022
152	K-th Smallest Element in a Sorted Matrix	5014
153	Check if the Elements of an Array are Consecutive	5010
154	Max Consecutive Ones Leetcode Solution	5008
155	Subarray with Given Sum	4973
156	Length of the largest subarray with contiguous elements	4970
157	OSI Model	4970
158	Guess Number Higher or Lower LeetCode Solution	4967
159	Find First and Last Position of Element in Sorted Array Leetcode Solution	4963
160	Find Smallest Missing Number in a Sorted Array	4940
161	Find the Missing Number	4938
162	Find Pair with Given Difference	4925
163	Subarray Product Less Than K LeetCode Solution	4920
164	Last Stone Weight	4913
165	Add Two Numbers II Leetcode Solution	4909
166	Majority Element II Leetcode Solution	4906
167	Lemonade Change Leetcode Solution	4905
168	Coin Change 2 Leetcode Solution	4898
169	Design Parking System Leetcode Solution	4897
170	Subarray Sum Equals K LeetCode Solution	4871
171	Reverse Words in a String III LeetCode Solution	4860
172	Delete middle element of a stack	4856
173	Capacity To Ship Packages Within D Days Leetcode Solution	4852
174	First negative integer in every window of size k	4850
175	Find the Row with Maximum Number of 1’s	4833
176	Form Minimum Number from Given Sequence of D’s and I’s	4829
177	String Compression	4815
178	Palindrome Linked List Leetcode Solution	4784
179	Trapping Rain Water Leetcode Solution	4777
180	Find All Duplicates in an Array LeetCode Solution	4753
181	Combinations Leetcode Solution	4743
182	Word Ladder LeetCode Solution	4730
183	Repeated Substring Pattern	4686
184	Iterative Implementation of Quick Sort	4682
185	Merge Sorted Array LeetCode Solution	4681
186	Remove Duplicates from Sorted List II LeetCode Solution	4675
187	Backspace String Compare	4674
188	Remove Linked List Elements Leetcode Solution	4673
189	Same Tree LeetCode Solution	4658
190	Break a Palindrome LeetCode Solution	4651
191	Monotonic Array LeetCode Solution	4642
192	Continuous Subarray Sum LeetCode Solution	4619
193	01 Matrix LeetCode Solution	4597
194	Single Element in a Sorted Array LeetCode Solution	4535
195	Merge k Sorted Lists Leetcode Solution	4535
196	Slowest Key Leetcode Solution	4524
197	Valid Perfect Square Leetcode Solution	4507
198	Remove All Occurrences of a Substring LeetCode Solution	4502
199	Leetcode Permutations	4502
200	Set Matrix Zeroes Leetcode Solution	4448
201	Insert Delete GetRandom O(1) Leetcode Solution	4441
202	Second Most Repeated Word in a Sequence	4440
203	Rearrange given Array in Maximum Minimum Form	4439
204	Combination Sum	4434
205	Find Peak Element LeetCode Solution	4428
206	Make The String Great Leetcode Solution	4421
207	The K Weakest Rows in a Matrix Leetcode Solution	4410
208	Rotate List Leetcode Solution	4395
209	Kth Largest Element in a Stream Leetcode Solution	4390
210	Relative Ranks Leetcode Solution	4389
211	Palindrome Number	4389
212	Printing brackets in Matrix Chain Multiplication Problem	4389
213	Convert a Number to Hexadecimal Leetcode Solution	4377
214	Longest Common Subsequence LeetCode Solution	4375
215	Time Based Key-Value Store LeetCode Solution	4375
216	Relative Sort Array Leetcode Solution	4348
217	Find the Duplicate Element	4340
218	Subarray Sum Equals k	4334
219	Find N Unique Integers Sum up to Zero Leetcode Solution	4332
220	Cuckoo sequence program	4332
221	Top K Frequent Elements LeetCode Solution	4324
222	Delete Node in a Linked List Leetcode Solution	4323
223	Number of Dice Rolls With Target Sum LeetCode Solution	4316
224	Max Area of Island	4316
225	Target Sum	4312
226	Moving Average from Data Stream Leetcode Solution	4290
227	Prefix to Postfix Conversion	4288
228	Generate all Binary Strings Without Consecutive 1’s	4288
229	Permutation in String Leetcode Solution	4267
230	Maximum Product of Three Numbers LeetCode Solution	4260
231	LRU Cache LeetCode Solution	4252
232	Find Leaders in an Array	4235
233	Check If Two String Arrays are Equivalent Leetcode Solution	4231
234	N-Queens LeetCode Solution	4200
235	Letter Combinations of a Phone Number	4198
236	Minimum Knight Moves LeetCode Solution	4187
237	Count Good Nodes in Binary Tree Leetcode Solution	4180
238	Unique Paths II Leetcode Solution	4175
239	Reverse Only Letters LeetCode Solution	4169
240	Find Triplet in Array With a Given Sum	4155
241	Scramble String	4154
242	Number of Steps to Reduce a Number to Zero Leetcode Solution	4149
243	Arithmetic Expression Evaluation	4146
244	Flipping an Image LeetCode Solution	4102
245	Stock Buy Sell to Maximize Profit	4078
246	Given two unsorted arrays find all pairs whose sum is x	4077
247	Minimum swaps required to bring all elements less than or equal to k together	4066
248	To Lower Case Leetcode Solution	4064
249	Check If N and Its Double Exist Leetcode Solution	4060
250	Remove Minimum Characters so that Two Strings Become Anagrams	4059
251	The kth Factor of n Leetcode Solution	4041
252	Maximum Population Year LeetCode Solution	4039
253	Min Cost Climbing Stairs LeetCode Solution	4032
254	Smallest Positive Number Missing in an Unsorted Array	4032
255	Student Attendance Record I Leetcode Solution	4027
256	Top K Frequent Elements	4019
257	Minimum Operations to convert X to Y	4010
258	Container With Most Water LeetCode Solution	4002
259	License Key Formatting Leetcode Solution	3988
260	Construct Binary Tree from Given Inorder and Preorder Traversals	3978
261	Next Permutation	3976
262	Search Suggestions System LeetCode Solution	3964
263	Prim’s Algorithm	3953
264	Maximum Subarray Sum using Divide and Conquer	3950
265	Stone Game LeetCode	3940
266	Reverse words in a string	3915
267	Maximum Sum Increasing Subsequence	3915
268	Find the Number Occurring Odd Number of Times in an Array	3904
269	Sum of Subarray Ranges Leetcode Solution	3903
270	Contains Duplicate LeetCode Solution	3868
271	Top K Frequent Words LeetCode Solution	3865
272	Min Stack	3856
273	Find The Duplicate Number	3852
274	Remove Duplicates from Sorted List LeetCode Solution	3842
275	Reformat Date LeetCode Solution	3828
276	Maximize Distance to Closest Person LeetCode Solution	3816
277	Special Array With X Elements Greater Than or Equal X Leetcode Solution	3805
278	Find Words That Can Be Formed by Characters Leetcode Solution	3775
279	BFS for Disconnected Graph	3772
280	Minimum Characters to be Added at Front to Make String Palindrome	3767
281	Maximum Depth of Binary Tree Leetcode Solution	3766
282	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	3763
283	Reverse individual words	3756
284	Find any one of the multiple repeating elements in read only array	3755
285	Evaluate Division	3748
286	Most Frequent Element in an Array	3744
287	Minimum Path Sum Leetcode Solution	3732
288	Diagonal Traverse LeetCode Solution	3731
289	Find if Path Exists in Graph Leetcode Solution	3719
290	Implement a stack using single queue	3715
291	Design A Leaderboard Leetcode Solution	3709
292	Count of index pairs with equal elements in an array	3706
293	Best Time to Buy and Sell Stock III Leetcode Solution	3699
294	Sort Elements by Frequency of Occurrences	3699
295	Reveal Cards In Increasing Order Leetcode Solution	3690
296	Intersection of Two Arrays	3678
297	House Robber	3675
298	Single Number	3673
299	Last Stone Weight II LeetCode Solution	3670
300	Arrange given Numbers to Form the Biggest Number II	3667
301	Longest Common Subsequence	3662
302	Count Number of Occurrences in a Sorted Array	3651
303	Remove Nth Node From End of List Leetcode Solution	3649
304	Minimum number of Merge Operations to make an Array Palindrome	3638
305	Length of Longest valid Substring	3634
306	Spiral Matrix II Leetcode Solution	3623
307	N-th Tribonacci Number Leetcode Solution	3619
308	Reverse Bits	3581
309	Diagonal Traversal LeetCode Solution	3577
310	Invalid Transactions LeetCode Solution	3568
311	Range Sum Query 2D – Immutable Leetcode Solution	3567
312	Binary Tree Inorder Traversal LeetCode Solution	3563
313	Symmetric Tree Leetcode Solution	3558
314	Sudoku Solver	3558
315	Find Leaves of Binary Tree LeetCode Solution	3544
316	Maximum Size Subarray Sum Equals k Leetcode Solution	3521
317	Shortest Word Distance Leetcode Solution	3511
318	Special Positions in a Binary Matrix Leetcode Solution	3507
319	Alien Dictionary LeetCode Solution	3502
320	Find the Closest Palindrome number	3499
321	Least Number of Unique Integers after K Removals Leetcode Solution	3495
322	Brightest Position on Street LeetCode Solution	3493
323	Mobile Numeric Keypad Problem	3466
324	Construct BST from its given Level Order Traversal	3462
325	One Edit Distance LeetCode Solution	3459
326	Jump Game	3455
327	Sort Array By Parity II Leetcode Solution	3453
328	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3445
329	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3437
330	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3437
331	Partition Array Into Three Parts With Equal Sum Leetcode Solution	3435
332	Remove All Ones With Row and Column Flips Leetcode Solution	3434
333	Partition Labels LeetCode Solution	3431
334	Remove Invalid Parentheses Leetcode Solution	3424
335	Find Duplicates in an Array in Most Efficient Way	3422
336	The Celebrity Problem	3415
337	Round Robin Scheduling	3408
338	Check whether Strings are K Distance Apart or Not	3402
339	Next Greater Element III LeetCode Solution	3397
340	Robot Bounded In Circle LeetCode Solution	3391
341	Rank Transform of an Array Leetcode Solution	3385
342	Find Winner on a Tic Tac Toe Game Leetcode Solution	3383
343	Largest Rectangle in Histogram LeetCode Solution	3369
344	Clone Graph LeetCode Solution	3368
345	Reverse Nodes in k-Group LeetCode Solution	3354
346	Paint House LeetCode Solution	3351
347	Pair of Positive Negative Values in an Array	3348
348	Next Permutation LeetCode Solution	3345
349	Minimum operation to make all elements equal in array	3343
350	Invert Binary Tree LeetCode Solution	3334
351	Count of Triplets With Sum Less than Given Value	3334
352	Unique Paths	3319
353	Minimum Moves to Equal Array Elements Leetcode Solution	3315
354	Maximum Circular Subarray Sum	3312
355	Tug of War	3308
356	Regular Expression Matching Regular Expression Matching LeetCode Solution	3300
357	Longest subarray not having more than K distinct elements	3298
358	Range Sum of BST LeetCode Solution	3296
359	Minimum Cost to Hire K Workers	3296
360	Minimum Depth of Binary Tree Leetcode Solution	3295
361	Minimum Time Visiting All Points Leetcode Solution	3294
362	String Matching in an Array Leetcode Solution	3284
363	Maximal Square	3283
364	Merge Two Sorted Linked Lists	3277
365	Bitwise AND of Numbers Range LeetCode Solution	3270
366	Painting Fence Algorithm	3267
367	K Empty Slots LeetCode	3267
368	Check if a given array contains duplicate elements within k distance from each other	3264
369	Find Top K (or Most Frequent) Numbers in a Stream	3263
370	Smallest Subarray with k Distinct Numbers	3262
371	Hamming Distance Leetcode Solution	3258
372	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	3253
373	Find minimum difference between any two elements	3252
374	Longest Common Prefix using Trie	3245
375	Dijkstra Algorithm	3245
376	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	3238
377	Split Linked List in Parts Leetcode Solution	3231
378	Find the subarray with least average	3230
379	Minimum Time to Collect All Apples in a Tree LeetCode Solution	3224
380	Number of Smaller Elements on Right Side	3222
381	Longest subsequence such that difference between adjacents is one	3220
382	Maximum Subarray	3220
383	Non-decreasing Array LeetCode Solution	3219
384	Number of Islands II LeetCode Solution	3213
385	Sliding Window Technique	3211
386	Find the First and Second Smallest Elements	3210
387	Find Maximum Level sum in Binary Tree	3208
388	Combination Sum IV LeetCode Solution	3206
389	Sort a stack using a temporary stack	3205
390	Transpose Graph	3204
391	Design Browser History LeetCode Solution	3202
392	Permutation Sequence LeetCode Solution	3202
393	Common elements in all rows of a given matrix	3196
394	First Circular Tour to Visit all the Petrol Bunks	3182
395	Minimize Maximum Pair Sum in Array LeetCode Solution	3178
396	Find the Smallest Divisor given a Threshold Leetcode Solution	3176
397	LRU Cache Implementation	3176
398	Ugly Number II LeetCode Solution	3175
399	Maximum Number of Occurrences of a Substring Leetcode Solution	3172
400	Missing Element in Sorted Array LeetCode Solution	3172
401	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	3171
402	Given an Array of Pairs Find all Symmetric Pairs in it	3171
403	Implementation of Deque using circular array	3164
404	Longest Substring with At Most K Distinct Characters LeetCode Solution	3161
405	Integer Break LeetCode Solution	3160
406	Unique Paths III LeetCode Solution	3158
407	Invert Binary Tree LeetCode Solution	3154
408	Path With Maximum Minimum Value LeetCode Solution	3154
409	Queries for counts of array elements with values in given range	3146
410	Graph Valid Tree LeetCode Solution	3144
411	Longest Palindrome can be Formed by Removing or Rearranging Characters	3141
412	LRU Cache Leetcode Solution	3140
413	Priority Queue using doubly linked list	3131
414	Convert Sorted Array to Binary Search Tree LeetCode Solutions	3118
415	Find the Peak Element from an Array	3113
416	Find duplicates in a given array when elements are not limited to a range	3112
417	Stone Game II Leetcode	3112
418	K Closest Points to Origin Leetcode Solution	3102
419	Word Search	3096
420	Minesweeper LeetCode Solution	3089
421	Consecutive Characters LeetCode Solution	3085
422	Max stack	3083
423	Top View of Binary Tree	3083
424	Insert Interval Leetcode Solution	3078
425	Maximum Consecutive Numbers Present in an Array	3076
426	Toeplitz Matrix	3074
427	Kth Smallest Element in a BST Leetcode Solution	3065
428	Partition List Leetcode Solution	3057
429	Replace Elements with Greatest Element on Right Side Leetcode Solution	3057
430	Decompress Run-Length Encoded List Leetcode Solution	3056
431	Odd Even Linked List Leetcode Solution	3054
432	Validate Stack Sequences LeetCode Solution	3050
433	Can Make Arithmetic Progression From Sequence Leetcode Solution	3049
434	Stack Permutations (Check if an array is stack permutation of other)	3049
435	Design a stack that supports getMin() in O(1) time and O(1) extra space	3045
436	Snakes and Ladders LeetCode Solution	3044
437	Sort elements by frequency	3042
438	Restore IP Addresses Leetcode Solution	3041
439	Expression Contains Redundant Bracket or Not	3038
440	Binary Tree Maximum Path Sum LeetCode Solution	3036
441	Kruskal Algorithm	3027
442	Minimum Absolute Difference in BST Leetcode Solution	3023
443	Number of Closed Islands Leetcode Solution	3021
444	Nth Catalan Number	3019
445	Search in a Binary Search Tree Leetcode Solution	3010
446	Sequences of given length where every element is more than or equal to twice of previous	3007
447	Priority Queue in C++	3002
448	Search a 2D Matrix II Leetcode Solution	3001
449	Rearrange array such that even positioned are greater than odd	2998
450	Flood Fill LeetCode	2997
451	Recursion	2994
452	Move All the Zeros to the End of the Given Array	2994
453	Substring with Concatenation of All Words Leetcode Solution	2991
454	Sorting array using Stacks	2984
455	Longest Common Prefix using Sorting	2975
456	Kth Non-repeating Character	2974
457	Is Graph Bipartite? LeetCode Solution	2966
458	Find Minimum in Rotated Sorted Array II LeetCode Solution	2964
459	Postfix to Prefix Conversion	2964
460	Integer to English words	2963
461	Find a Peak Element II LeetCode Solution	2962
462	Palindrome Substring Queries	2961
463	Gold Mine Problem	2959
464	Number Complement Leetcode Solution	2953
465	Vertical Order Traversal of Binary Tree LeetCode Solution	2952
466	Path Sum II LeetCode Solution	2950
467	Distance of nearest cell having 1 in a binary matrix	2950
468	Check if Two given Strings are Isomorphic to each other	2941
469	Insert into a Binary Search Tree Leetcode Solution	2925
470	Reverse a linked list	2919
471	Number of Days Between Two Dates LeetCode Solution	2917
472	Convert Sorted Array to Binary Search Tree Leetcode Solution	2910
473	Minimum Path Sum	2909
474	How to Implement Stack Using Priority Queue or Heap?	2907
475	Majority Element	2907
476	Find All Possible Recipes from Given Supplies LeetCode Solution	2906
477	Queries for GCD of all numbers of an array except elements in a given range	2906
478	Best Time to Buy and Sell Stock	2900
479	4Sum	2896
480	3 Sum	2894
481	Cells with Odd Values in a Matrix LeetCode Solution	2890
482	Shortest Completing Word Leetcode Solution	2890
483	Multiplication of Two Matrices	2885
484	Balanced Expression with Replacement	2882
485	Shortest Palindrome	2877
486	Find Pythagorean Triplets from Array	2877
487	Count Submatrices With All Ones LeetCode Solution	2873
488	Find a Fixed Point in a Given Array	2873
489	Tiling Problem	2871
490	Trapping Rain Water LeetCode Solution	2871
491	Intersection of Two Linked Lists LeetCode Solution	2869
492	Longest Increasing Path in a Matrix LeetCode Solution	2868
493	Scramble String LeetCode Solution	2865
494	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	2862
495	High Five LeetCode Solution	2857
496	Design Hit Counter LeetCode Solution	2857
497	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	2853
498	The Stock Span Problem	2853
499	Check If Array Pairs Are Divisible by k LeetCode Solution	2850
500	Kth ancestor of a node in binary tree	2846
501	Sliding Window Maximum LeetCode Solution	2844
502	Find Median from Data Stream LeetCode Solution	2834
503	Custom Sort String Leetcode Solution	2827
504	Sort Colors	2827
505	Interval Tree	2822
506	Implement Trie (Prefix Tree) Leetcode Solution	2821
507	Reorder Data in Log Files LeetCode Solution	2820
508	Largest rectangular sub-matrix whose sum is 0	2819
509	Spiral Matrix III LeetCode Solution	2815
510	Camelcase Matching Leetcode Solution	2814
511	Find the first Repeating Number in a Given Array	2805
512	Insert Node in the Sorted Linked List	2804
513	Sliding Window Median Leetcode Solution	2801
514	Generate all Binary Strings from Given Pattern	2800
515	Detect a loop in the Linked List	2796
516	Sieve of Eratosthenes	2788
517	Evaluate Reverse Polish Notation LeetCode Solution	2786
518	Sort an array according to the order defined by another array	2785
519	Pancake Sorting Problem	2781
520	Divide Chocolate LeetCode Solution	2779
521	Merge Two Binary Trees LeetCode Solution	2779
522	Count subarrays having total distinct elements same as original array	2766
523	Letter Case Permutation	2751
524	Analyze User Website Visit Pattern LeetCode Solution	2748
525	Perfect Squares LeetCode Solution	2747
526	Check if Array Contains Contiguous Integers With Duplicates Allowed	2747
527	How to Create Mergable Stack?	2747
528	Fibonacci Number LeetCode Solution	2741
529	Coin Change Problem	2739
530	Different Ways to Add Parentheses Leetcode Solution	2737
531	Print all Palindromic Partitions of a String	2736
532	Fibonacci numbers	2735
533	Longest Common Prefix using Divide and Conquer	2735
534	Minimum Bracket Reversals	2733
535	Guess Number Higher or Lower II	2731
536	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	2730
537	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	2728
538	N queen problem	2726
539	Maximum Sum of Non Consecutive Elements	2726
540	Count Possible Triangles	2721
541	Palindrome Permutation LeetCode Solution	2720
542	Race Car LeetCode Solution	2718
543	Minimum Height Trees	2708
544	LCS (Longest Common Subsequence) of three strings	2705
545	Merge Overlapping Intervals	2705
546	The Maze III LeetCode Solution	2702
547	Largest Subarray with Equal Number of 0’s and 1’s	2700
548	Number of Distinct Islands Leetcode Solution	2697
549	Subset sum problem	2696
550	Decode String	2691
551	Path Crossing Leetcode Solution	2680
552	Count items common to both the lists but with different prices	2679
553	Group Anagrams	2675
554	Longest Substring with At Least K Repeating Characters LeetCode Solution	2674
555	Maximum Number of Ways to Partition an Array LeetCode Solution	2672
556	Find maximum length Snake sequence	2665
557	Maximum Element in an Array which is Increasing and then Decreasing	2664
558	Find a Sorted Subsequence of size 3	2661
559	Maximum Length of Chain Pairs	2658
560	Recover Binary Search Tree Leetcode Solution	2655
561	Longest Repeated Subsequence	2655
562	Find the Minimum Element in a Sorted and Rotated Array	2655
563	Queue based approach for first non-repeating character in a stream	2654
564	Shifting Letters LeetCode Solution	2650
565	Champagne Tower LeetCode Solution	2645
566	First missing positive	2645
567	Build an Array With Stack Operations Leetcode Solution	2644
568	Convert BST to Min Heap	2638
569	Find the two Numbers with Odd Occurrences in an Unsorted Array	2631
570	Minimum Jumps to Reach Home LeetCode Solution	2629
571	Find if an Expression has Duplicate Parenthesis or Not	2627
572	Minimum Height Trees LeetCode Solution	2625
573	Sort a stack using recursion	2621
574	Nearest Exit from Entrance in Maze LeetCode Solution	2620
575	Iterative Method to find Height of Binary Tree	2615
576	Decode Ways	2615
577	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	2614
578	Find the Lost Element From a Duplicated Array	2614
579	Number of Equivalent Domino Pairs Leetcode Solution	2612
580	Edit Distance LeetCode Solution	2609
581	Valid Boomerang Leetcode Solution	2609
582	Palindrome Partitioning Leetcode Solution	2607
583	K-th Distinct Element in an Array	2607
584	Sliding Window Maximum	2605
585	Implement Two Stacks in an Array	2604
586	Jump Game IV LeetCode Solution	2602
587	Rectangle Overlap LeetCode Solution	2601
588	Contains Duplicate	2600
589	Contiguous Array LeetCode Solution	2599
590	Most Stones Removed with Same Row or Column LeetCode Solution	2575
591	Subarrays with K Different Integers Leetcode Solution	2573
592	Queue using Stacks	2569
593	Reorder an Array According to the Given Indexes	2564
594	Distance Between Bus Stops Leetcode Solution	2562
595	Morris Traversal	2562
596	Monotonic Array Leetcode Solution	2552
597	Recover Binary Search Tree	2550
598	Design a Stack With Increment Operation Leetcode Solution	2544
599	Minimum number of jumps to reach end	2542
600	Find the Town Judge LeetCode Solution	2537
601	Word Break	2535
602	Construction of Longest Increasing Subsequence (N log N)	2532
603	Palindrome Permutations of a String	2529
604	Sort a String According to Another String	2528
605	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2525
606	Rearrange Spaces Between Words Leetcode Solution	2525
607	Maximum Depth of N-ary Tree Leetcode Solution	2520
608	Sorted Linked List to Balanced BST	2519
609	Palindromic Substrings Leetcode Solution	2507
610	Possible Bipartition LeetCode Solution	2504
611	Number of palindromic paths in a matrix	2502
612	Maximum Score After Splitting a String Leetcode Solution	2496
613	Best Meeting Point LeetCode Solution	2495
614	Smallest Good Base	2493
615	Find Largest Value in Each Tree Row LeetCode Solution	2490
616	Merge Overlapping Intervals II	2490
617	Reach a Number LeetCode Solution	2489
618	Implement strStr() LeetCode Solution	2488
619	Valid Parentheses Leetcode Solution	2483
620	Merge Two Balanced Binary Search Trees	2475
621	Mean of Array After Removing Some Elements Leetcode Solution	2473
622	Maximize Elements Using Another Array	2470
623	All Possible Full Binary Trees LeetCode Solution	2465
624	Maximum sum rectangle in a 2D matrix	2465
625	Maximum Product of Splitted Binary Tree LeetCode Solution	2461
626	Check if the given array can represent Level Order Traversal of Binary Search Tree	2460
627	Binary Tree zigzag level order Traversal	2460
628	Maximum Frequency Stack Leetcode Solution	2453
629	Valid Sudoku	2452
630	Best Time to Buy and Sell Stock IV LeetCode Solution	2449
631	Find the Subarray of given length with Least Average	2449
632	Find the First Circular Tour that visits all the Petrol Pumps	2447
633	Swapping Nodes in a Linked List Leetcode Solution	2445
634	Perform String Shifts Leetcode	2445
635	Design Skiplist LeetCode Solution	2443
636	A Space Optimized DP solution for 0-1 Knapsack Problem	2433
637	Detect Capital Leetcode Solution	2432
638	Caesar Cipher	2431
639	Find Median from data Stream	2423
640	Brick Wall LeetCode Solution	2419
641	Find all pairs (a, b) in an array such that a % b = k	2413
642	Pair with given product	2409
643	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2408
644	Word Pattern	2406
645	Count pair with Given Sum	2405
646	Merge K Sorted Arrays and Print Sorted Output	2403
647	My Calendar I LeetCode Solution	2399
648	Palindrome Permutation	2392
649	Convert Sorted List to Binary Search Tree	2392
650	Check for Balanced Parentheses in an Expression	2391
651	Find First and Last Position of Element in Sorted Array LeetCode Solution	2383
652	Binary Tree Right Side View LeetCode Solution	2364
653	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2356
654	Populating Next Right Pointers in Each Node Leetcode Solution	2353
655	Huffman Coding	2353
656	Add two numbers	2353
657	Segregate 0s and 1s in an Array	2346
658	Construct BST from given Preorder Traversal	2346
659	Split Array Into Consecutive Subsequences	2341
660	Level order Traversal in Spiral Form	2335
661	How to Efficiently Implement k Stacks in a Single Array?	2333
662	All Unique Triplets that Sum up to a Given Value	2330
663	Largest Sum Contiguous Subarray	2329
664	Length of Longest Fibonacci Subsequence	2329
665	Print Fibonacci sequence using 2 variables	2328
666	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2328
667	Count ways to reach the nth stair using step 1, 2 or 3	2325
668	Count Sub Islands LeetCode Solution	2324
669	Find whether a subarray is in form of a mountain or not	2319
670	Maximum Number of Chocolates to be Distributed Equally Among k Students	2316
671	Web Crawler LeetCode Solution	2312
672	Check if a Linked list of Strings form a Palindrome	2312
673	Minimum time required to rot all oranges	2309
674	Arithmetic Slices II – Subsequence LeetCode Solution	2307
675	Find all triplets with zero sum	2306
676	Longest Subarray Having Count of 1s One More than Count of 0s	2301
677	Counting Bits	2301
678	Print all subarrays with 0 sum	2299
679	Remove brackets from an algebraic string containing + and – operators	2296
680	Validate Binary Search Tree	2296
681	Isomorphic Strings LeetCode Solution	2293
682	Partition to K Equal Sum Subsets Leetcode Solution	2293
683	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	2292
684	Populating Next Right Pointers in Each Node	2292
685	Minimum Sum Path in a Triangle	2289
686	Sort 0s 1s and 2s in an Array	2289
687	Find four elements that sum to a given value (Hashmap)	2285
688	Minimum Swaps to Group All 1’s Together Leetcode Solution	2276
689	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	2274
690	Count Distinct Elements in Every Window of Size K	2272
691	Partition Problem	2260
692	Swap Kth Node from beginning with Kth Node from End	2256
693	Concatenation of Array LeetCode Solution	2255
694	Remove Palindromic Subsequences Leetcode Solution	2251
695	Heap Sort	2249
696	Bubble sort using two Stacks	2248
697	Check if String Follows Order of Characters by a Pattern or not	2248
698	Range Sum Query 2D – Immutable LeetCode Solution	2244
699	Maximize Sum of Array after K Negations Leetcode Solution	2234
700	Elements Appear more than N/K times in Array	2228
701	Happy Number	2225
702	Binary Tree to Binary Search Tree Conversion	2221
703	Finding K closest element	2206
704	Count Minimum Steps to Get the given Array	2205
705	String comparison containing wildcards	2200
706	Count Good Nodes in Binary Tree LeetCode Solution	2198
707	Difference Array \| Range update query in O(1)	2193
708	Rotate Array	2183
709	Maximum Product Subarray II	2177
710	Find All Pairs With a Given Difference	2176
711	Inorder Successor of a node in Binary Tree	2175
712	Maximum Distance in Array	2170
713	Increasing Subsequence of Length three with Maximum Product	2169
714	Find Maximum of Minimum for Every Window Size in a Given Array	2167
715	Contiguous Array Leetcode	2166
716	Sum Root to Leaf Numbers LeetCode Solution	2164
717	Find Duplicate Subtrees	2159
718	Queries on Probability of Even or Odd Number in given Ranges	2158
719	Container with Most Water	2157
720	Rearrange an Array Such that arr[i] is equal to i	2156
721	Nested List Weight Sum II LeetCode Solution	2154
722	An Interesting Method to generate Binary Numbers from 1 to n	2153
723	Linked List Cycle	2152
724	Find pairs with given sum such that elements of pair are in different rows	2152
725	MiniMax Algorithm	2146
726	Merge Two Sorted Lists Leetcode	2145
727	Breadth First Search (BFS) for a Graph	2133
728	Reverse Nodes in K-Group	2132
729	Iterative Depth First Traversal of Graph	2130
730	Longest Common Prefix Using Binary Search II	2128
731	Score of Parenthesis LeetCode Solution	2124
732	Queue Reconstruction by Height	2123
733	Symmetric Tree	2123
734	Climbing stairs	2123
735	Longest Increasing Subsequence	2122
736	Reorder Array Using Given Indexes	2120
737	Parallel Courses II LeetCode Solution	2119
738	Minimum Swaps to Make Strings Equal Leetcode Solution	2109
739	Remove duplicates from sorted array	2107
740	Minimum Cost to Move Chips to The Same Position LeetCode Solution	2106
741	Substring With Concatenation Of All Words	2105
742	Alien Dictionary	2102
743	Delete Nodes and Return Forest Leetcode Solution	2101
744	Merge K Sorted Linked Lists	2101
745	Root to Leaf path with target sum Leetcode Solutions	2099
746	Iterative Preorder Traversal	2089
747	Check if Two Expressions With Brackets are Same	2089
748	Delete Nth node from the end of the given linked list	2084
749	Union and Intersection of two Linked Lists	2082
750	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	2080
751	Deletion in a Binary Tree	2080
752	Kill Process LeetCode Solution	2077
753	Longest Common Prefix Word by Word Matching	2068
754	Check if a queue can be sorted into another queue using a stack	2066
755	Minimum Number of Arrows to Burst Balloons LeetCode Solution	2063
756	Merging Intervals	2062
757	Smallest Range II Leetcode Solution	2057
758	K maximum sums of overlapping contiguous sub-arrays	2057
759	Minimum Distance Between BST Nodes Leetcode Solution	2054
760	Maximum size subarray sum equals k	2054
761	Check if any two intervals overlap among a given set of intervals	2053
762	Range LCM Queries	2049
763	Find the first repeating element in an array of integers	2048
764	Flatten 2D Vector LeetCode Solution	2047
765	Print a Binary Tree in Vertical Order	2042
766	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	2041
767	New 21 Game	2039
768	Non-overlapping sum of two sets	2038
769	Find subarray with given sum (Handles Negative Numbers)	2037
770	Minimum Size Subarray Sum	2035
771	Maximum difference between two elements such as larger element comes after smaller	2029
772	Find K Closest Elements LeetCode Solution	2028
773	Partition Equal Subset Sum	2028
774	Verify Preorder Serialization of a Binary Tree	2016
775	Construct Binary Tree from given Parent Array representation	2013
776	Maximum Product Subarray	2013
777	Matrix Chain Multiplication	2009
778	Sort Array by Increasing Frequency Leetcode Solution	2008
779	Find the Difference Leetcode Solution	2008
780	Vertical sum in a given binary tree	2008
781	Reservoir Sampling	2002
782	Friends Of Appropriate Ages LeetCode Solution	2001
783	Defanging an IP Address LeetCode Solution	1999
784	Boundary Traversal of binary tree	1995
785	Minimum Remove to Make Valid Parentheses LeetCode Solution	1988
786	Find Maximum Sum Possible Equal Sum of Three Stacks	1988
787	Check if a given array can represent Preorder Traversal of Binary Search Tree	1975
788	Sorting a K Sorted Array	1974
789	Flatten Binary Tree to Linked List LeetCode Solution	1972
790	The Painter’s Partition Problem	1971
791	Valid Parenthesis String	1970
792	Valid Anagrams	1968
793	Find K Length Subarray of Maximum Average	1968
794	Pancake Sorting	1964
795	Peak Index in a Mountain Array LeetCode Solution	1962
796	Find Three Element From Different Three Arrays Such That a + b + c = sum	1959
797	Boolean Parenthesization Problem	1958
798	Level order traversal using two Queues	1953
799	Find Sum of all unique sub-array sum for a given array	1947
800	Palindrome Partitioning	1944
801	Count pairs from two linked lists whose sum is equal to a given value	1942
802	BFS vs DFS for Binary Tree	1937
803	Sum of f(a[i], a[j]) over all pairs in an array of n integers	1932
804	Given a binary tree, how do you remove all the half nodes?	1930
805	Remove Duplicates from Sorted List II	1928
806	Number of siblings of a given Node in n-ary Tree	1928
807	Largest Submatrix With Rearrangements LeetCode Solution	1927
808	Check Completeness of a Binary Tree LeetCode Solution	1923
809	Check if all levels of two Binary Tree are anagrams or not	1921
810	Valid Triangle Number LeetCode Solution	1918
811	Count number of triplets with product equal to given number	1918
812	Super Ugly Number	1918
813	Employee Importance LeetCode Solution	1916
814	Third Maximum Number Leetcode Solution	1911
815	Hamming Distance	1905
816	Unique Binary Search Trees LeetCode Solution	1902
817	Isomorphic Strings	1902
818	Kth Smallest Element in a Sorted Matrix LeetCode Solution	1901
819	Number Of Longest Increasing Subsequence	1901
820	Tree Traversal (Preorder, Inorder & Postorder)	1899
821	Longest Palindromic Subsequence	1898
822	Lowest Common Ancestor	1897
823	Print All Distinct Elements of a Given Integer Array	1894
824	Level of Each node in a Tree from source node	1891
825	Create Maximum Number	1890
826	Count and Say	1888
827	Balanced Binary Tree	1886
828	Largest divisible pairs subset	1885
829	Products of ranges in an array	1885
830	Find Peak Element	1885
831	Find Element Using Binary Search in Sorted Array	1885
832	Unique Binary Search Trees	1882
833	Array Nesting Leetcode Solution	1880
834	Find distance between two nodes of a Binary Tree	1880
835	Largest BST Subtree LeetCode Solution	1878
836	Print all triplets in sorted array that form AP	1878
837	Closest Leaf in a Binary Tree LeetCode Solution	1877
838	Maximum subsequence sum such that no three are consecutive	1877
839	Find the largest multiple of 3	1872
840	Median of Two Sorted Arrays	1872
841	Find Common Characters Leetcode Solution	1870
842	Check if two nodes are on the same path in a Tree	1864
843	Distinct Subsequences	1862
844	Minimum insertions to form a palindrome with permutations allowed	1861
845	Bold Words in String LeetCode Solution	1852
846	Arrange given numbers to form the biggest number	1852
847	Maximum number of segments of lengths a, b and c	1849
848	Topological Sorting	1849
849	Find Smallest Range Containing Elements from k Lists	1848
850	Newman-Conway Sequence	1847
851	Infix to Postfix	1847
852	Binary array after M range toggle operations	1843
853	Subset Sum Problem in O(sum) space	1842
854	Valid Number	1833
855	Four Elements that Sum to Given	1832
856	Merging Two Sorted Arrays	1830
857	Find Nth Node	1827
858	Compare Strings by Frequency of the Smallest Character Leetcode Solution	1825
859	Shuffle an Array	1825
860	Next Greater Element in an Array	1820
861	Maximum Population Year LeetCode Solution	1818
862	Sort Elements by Frequency II	1817
863	Lower Case To Upper Case	1811
864	First Bad Version	1804
865	Transform a BST to Greater sum Tree	1803
866	Missing Number	1801
867	Path Sum	1796
868	Insert Delete GetRandom	1795
869	Contiguous Array	1793
870	Stone Game IV LeetCode Solution	1789
871	Maximum Sum of 3 Non-Overlapping Subarrays	1788
872	Sentence Screen Fitting LeetCode Solution	1785
873	Largest subarray with equal number of 0s and 1s	1785
874	Averages of Levels in Binary Tree	1784
875	Binary Tree Longest Consecutive Sequence LeetCode Solution	1781
876	Encoded String With Shortest Length LeetCode Solution	1780
877	Bottom View of a Binary Tree	1778
878	Stone Game IV LeetCode Solution	1777
879	Print Right View of a Binary Tree	1775
880	Merge Two Sorted Arrays	1774
881	Valid Triangle Number LeetCode Solution	1773
882	Count Primes in Ranges	1770
883	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	1769
884	Find Largest d in Array such that a + b + c = d	1769
885	Minimum sum of squares of character counts in a given string after removing k characters	1766
886	Trapping Rain Water II LeetCode Solution	1765
887	Height of a generic tree from parent array	1765
888	Red-Black Tree Introduction	1760
889	Minimum Swaps To Make Sequences Increasing LeetCode Solution	1758
890	Closest Binary Search Tree Value Leetcode Solution	1756
891	Kth Smallest Number in Multiplication Table Leetcode Solution	1755
892	Iterative Postorder Traversal Using Two Stacks	1748
893	Integer to Roman	1747
894	Permutations of a Given String Using STL	1746
895	Longest Bitonic Subsequence	1743
896	Find unique character in a string	1743
897	Range Minimum Query (Square Root Decomposition and Sparse Table)	1738
898	Next Greater Element II LeetCode Solution	1736
899	Valid Perfect Square LeetCode Solution	1734
900	Friends Pairing Problem	1732
901	Serialize and Deserialize Binary Tree LeetCode Solution	1731
902	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	1724
903	Segment Tree	1724
904	Diagonal Traversal of Binary Tree	1718
905	Reorganize String	1714
906	Diameter of N-Ary Tree LeetCode Solution	1712
907	Range Sum Query using Sparse Table	1707
908	Binary Search Tree Delete Operation	1707
909	Orderly Queue LeetCode Solution	1702
910	Next greater element	1697
911	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	1692
912	Maximum difference between frequency of two elements such that element having greater frequency is also greater	1692
913	Swap Nodes In Pairs	1692
914	Level Order Traversal of Binary Tree	1678
915	Serialize and Deserialize Binary Tree	1675
916	Koko Eating Bananas LeetCode Solution	1673
917	Constant time range add operation on an array	1672
918	Find Minimum In Rotated Sorted Array	1672
919	Reverse a Path in BST using Queue	1664
920	Valid Tic-Tac-Toe State LeetCode Solution	1661
921	Maximum difference between first and last indexes of an element in array	1658
922	Best Meeting Point LeetCode Solution	1655
923	Total Hamming Distance LeetCode Solution	1653
924	Maximum Product Subarray	1653
925	Largest Plus Sign Leetcode Solution	1647
926	Advantages of BST over Hash Table	1647
927	Find the smallest binary digit multiple of given number	1644
928	Convert BST into a Min-Heap without using array	1644
929	The Number of Weak Characters in the Game LeetCode Solution	1637
930	Maximum Product Subarray	1636
931	Find minimum number of merge operations to make an array palindrome	1636
932	Array Queries for multiply replacements and product	1622
933	Maximum Sum Increasing Subsequence	1622
934	Longest Increasing Consecutive Subsequence	1620
935	Edit Distance	1618
936	A program to check if a binary tree is BST or not	1611
937	Count the Pairs at Same Distance as in English Alphabets	1611
938	Greatest Sum Divisible by Three LeetCode Solution	1607
939	Design Add and Search Words Data Structure LeetCode Solution	1606
940	Collect maximum points in a grid using two traversals	1606
941	Image Overlap LeetCode Solution	1604
942	Shuffle a given Array	1604
943	Print n terms of Newman-Conway Sequence	1603
944	Find the node with minimum value in a Binary Search Tree	1601
945	Write Code to Determine if Two Trees are Identical	1598
946	K’th Largest element in BST using constant extra space	1595
947	Dividing Array into Pairs With Sum Divisible by K	1595
948	Range Queries for Longest Correct Bracket Subsequence	1592
949	Group Shifted Strings Leetcode Solution	1591
950	Design Underground System Leetcode Solution	1589
951	Longest Substring Without Repeating Characters Leetcode Solution	1586
952	Factorial Trailing Zeroes LeetCode Solution	1585
953	Write a function to get the intersection point of two Linked Lists	1583
954	Check if an Array is Stack Sortable	1582
955	Print Next Greater Number of Q queries	1580
956	Moving Stones Until Consecutive Leetcode Solution	1575
957	Queries on XOR of greatest odd divisor of the range	1573
958	Merge Sort	1572
959	Insert into a Sorted Circular Linked List LeetCode Solution	1563
960	Clone a Binary Tree with Random Pointers	1558
961	Power of Two	1554
962	Binary Search Tree Search and Insertion	1552
963	K’th Largest Element in BST when modification to BST is not allowed	1551
964	Print modified array after multiple array range increment operations	1550
965	Lowest Common Ancestor in Binary Search Tree	1547
966	Swim in Rising Water LeetCode Solution	1546
967	Form Minimum Number From Given Sequence	1544
968	Numbers with prime frequencies greater than or equal to k	1539
969	Maximum Array from Two given Arrays Keeping Order Same	1535
970	Form minimum number from given sequence	1528
971	Guess The Word	1524
972	Priority Queue	1516
973	Closest Binary Search Tree Value II LeetCode Solution	1515
974	Count even length binary sequences with same sum of first and second half bits	1514
975	Check for Palindrome after every character replacement Query	1513
976	Cutting a Rod	1510
977	Check if X can give change to every person in the Queue	1506
978	Merge Sorted Array	1505
979	Check if each internal node of a BST has exactly one child	1496
980	Find maximum average subarray of k length	1496
981	Excel Sheet Column Number LeetCode Solution	1495
982	K Empty Slots	1489
983	Longest Common Prefix using Character by Character Matching	1489
984	Print all Possible Ways to Break a String in Bracket Form	1488
985	Construct Complete Binary Tree from its Linked List Representation	1484
986	Count and Toggle Queries on a Binary Array	1474
987	Queries for Decimal Values of Subarrays of a Binary Array	1474
988	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1473
989	Number of elements less than or equal to a given number in a given subarray	1471
990	Count Pairs Whose Products Exist in Array	1465
991	Minimum Moves to Equal Array Elements LeetCode Solution	1461
992	Queries for Number of Distinct Elements in a Subarray	1461
993	Sorted Array to Balanced BST	1460
994	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1452
995	Number of Orders in the Backlog Leetcode Solution	1452
996	Merge two BSTs with limited extra space	1451
997	Kth Smallest Element in a BST	1450
998	Find postorder traversal of BST from preorder traversal	1449
999	Print Ancestors of a Given Binary Tree Node Without Recursion	1447
1000	Binary Search Tree	1446
1001	Sum of Left Leaves LeetCode Solution	1441
1002	Decrease Elements To Make Array Zigzag LeetCode Solution	1439
1003	Unique Paths II	1438
1004	Search in Sorted Rotated Array	1438
1005	Regular Expression Matching	1426
1006	How to print maximum number of A’s using given four keys	1425
1007	Graph Cloning	1423
1008	Palindrome Partitioning	1423
1009	Excel Sheet Column Title LeetCode Solution	1415
1010	Check given array of size n can represent BST of n levels or not	1404
1011	Maximum weight transformation of a given string	1401
1012	Find Maximum Depth of Nested Parenthesis in a String	1397
1013	Shortest Unsorted Continuous Subarray LeetCode Solution	1396
1014	Symmetric Tree LeetCode Solution Leetcode Solution	1389
1015	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1374
1016	Random Pick Index LeetCode Solution	1371
1017	Maximum Depth Of Binary Tree	1367
1018	Data Structure Designing	1365
1019	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1341
1020	Iterative method to find ancestors of a given binary tree	1339
1021	Search an Element in Sorted Rotated Array	1331
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1328
1023	Find the Town Judge LeetCode Solution	1309
1024	Binary Tree to Binary Search Tree Conversion using STL set	1284
1025	Next Greater Element I Leetcode Solution	1255
1026	Maximum Binary Tree	1246
1027	Print Maximum Length Chain of Pairs	1213
1028	Find k-th smallest element in BST (Order Statistics in BST)	1209
1029	Peeking Iterator LeetCode Solution	1190
1030	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	1186
1031	Flatten Binary Tree to Linked List LeetCode Solution	1179