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	34189
2	Maximum occurring character in a string	17777
3	Plus One Leetcode Solution	16513
4	Valid Parentheses LeetCode Solution	15950
5	3Sum Leetcode Solution	13518
6	First Repeating Element	13203
7	Single Number Leetcode Solution	12252
8	Pow(x, n) Leetcode Solution	11690
9	Sqrt(x) Leetcode Solution	11414
10	Merge Sorted Arrays Leetcode Solution	11205
11	Meeting Rooms II LeetCode Solution	11072
12	Concatenation of Array LeetCode Solution	10479
13	Contains Duplicate II Leetcode Solution	10011
14	Roman to Integer Leetcode Solution	9876
15	Count Primes Leetcode Solutions	9813
16	Search Insert Position Leetcode Solution	9659
17	Palindrome Number LeetCode Solution	9654
18	Valid Palindrome Leetcode Solution	9461
19	Reverse Vowels of a String Leetcode Solution	9266
20	Jump Game Leetcode Solution	8994
21	Intersection of Two Arrays II Leetcode Solution	8862
22	Kids With the Greatest Number of Candies Leetcode Solution	8715
23	House Robber Leetcode Solution	8662
24	Number of Good Pairs Leetcode Solution	8633
25	Spiral Matrix LeetCode Solution	8613
26	Find the Maximum Repeating Number in Array	8561
27	Text Justification LeetCode Solution	8521
28	Add Binary Leetcode Solution	8508
29	Longest Substring Without Repeating Characters LeetCode Solution	8308
30	Number Of 1 bits	8058
31	Longest Palindromic Substring LeetCode Solution	8010
32	Jewels and Stones Leetcode Solution	7984
33	Power of Two Leetcode Solution	7944
34	Maximum Subarray Leetcode Solution	7838
35	Permutations Leetcode Solution	7720
36	Shuffle String Leetcode Solution	7664
37	Find All Numbers Disappeared in an Array Leetcode Solution	7622
38	Daily Temperatures Leetcode Solution	7540
39	Min Stack Leetcode Solution	7515
40	Maximum Profit in Job Scheduling Leetcode Solution	7424
41	Next Permutation Leetcode Solution	7403
42	Kth Missing Positive Number Leetcode Solution	7394
43	Longest Common Prefix Leetcode Solution	7354
44	Frog Jump Leetcode Solution	7346
45	Move Zeroes LeetCode Solution	7337
46	Number of Islands LeetCode Solution	7332
47	Running Sum of 1d Array Leetcode Solution	7312
48	Word Search Leetcode Solution	7293
49	Third Maximum Number Leetcode Solution	7217
50	Find Minimum Distance Between Two Numbers in an Array	7138
51	Rotate Image LeetCode Solution	7003
52	Bulb Switcher LeetCode Solution	6966
53	Remove Duplicates from Sorted Array Leetcode Solution	6964
54	Next Greater Element I Leetcode Solution	6956
55	Median of Two Sorted Arrays LeetCode Solution	6954
56	Combination Sum Leetcode Solution	6947
57	Shuffle the Array Leetcode Solution	6910
58	Can Place Flowers LeetCode Solution	6908
59	3Sum Closest LeetCode Solution	6831
60	Multiply Strings Leetcode Solution	6789
61	Search in Rotated Sorted Array Leetcode Solution	6776
62	House Robber II Leetcode Solution	6744
63	Count and Say Leetcode Solution	6696
64	Reverse String Without Temporary Variable	6664
65	Missing Number Leetcode Solution	6647
66	Strobogrammatic Number LeetCode Solution	6645
67	Valid Anagram Leetcode Solution	6583
68	Subarray and Subsequence	6543
69	Isomorphic Strings Leetcode Solution	6447
70	Excel Sheet Column Title Leetcode Solution	6447
71	Integer to Roman Leetcode Solution	6441
72	Evaluation of Postfix Expression	6397
73	Count Pairs With Given Sum	6386
74	Koko Eating Bananas Leetcode Solution	6382
75	Product of array except self	6321
76	Rotate String LeetCode Solution	6285
77	Find the Difference Leetcode Solution	6204
78	String to Integer (atoi) LeetCode Solution	6193
79	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	6150
80	Largest Number Leetcode Solution	6105
81	Candy LeetCode Solution	6050
82	Majority Element Leetcode Solution	6041
83	Happy Number Leetcode Solution	6008
84	Set Matrix Zeroes	5940
85	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	5928
86	Find Common Characters Leetcode Solution	5902
87	Balanced Binary Tree Leetcode Solution	5891
88	Is Subsequence Leetcode Solution	5851
89	Summary Ranges Leetcode Solution	5801
90	Smallest window in a string containing all characters of another string	5748
91	Find the Town Judge Leetcode Solution	5738
92	Arranging Coins Leetcode Solution	5721
93	Word Pattern LeetCode Solution	5721
94	Unique Paths Leetcode Solution	5711
95	Subset Leetcode	5694
96	Rearrange Positive and Negative Numbers Alternatively in Array	5627
97	Sort Colors LeetCode Solution	5596
98	Binary Search LeetCode Solution	5541
99	Sort Characters By Frequency LeetCode Solution	5539
100	String Compression LeetCode Solution	5525
101	Asteroid Collision LeetCode Solution	5494
102	Best Time to Buy and Sell Stock LeetCode Solution	5466
103	Repeated Substring Pattern LeetCode Solution	5463
104	Find the Winner of the Circular Game LeetCode Solution	5446
105	Find the Duplicate Number LeetCode Solution	5428
106	Sort Array By Parity LeetCode Solution	5400
107	Reverse Integer Leetcode Solution	5372
108	Linked List Cycle II LeetCode Solution	5359
109	Valid Palindrome II Leetcode Solution	5354
110	Best Time to Buy and Sell Stock II Leetcode Solution	5334
111	Sum of minimum and maximum elements of all subarrays of size k	5307
112	A Product Array Puzzle	5300
113	Product of Array Except Self LeetCode Solution	5283
114	Rabin Karp Algorithm	5283
115	Zigzag Conversion LeetCode Solution	5253
116	Expression Evaluation	5248
117	Divide Two Integers Leetcode Solution	5236
118	Bus Routes Leetcode Solution	5194
119	Group Anagrams LeetCode Solution	5179
120	Employee Free Time LeetCode Solution	5155
121	Merge Two Sorted Lists Leetcode Solutions	5141
122	Matrix Chain Multiplication using Dynamic Programming	5078
123	First element occurring k times in an array	5073
124	Pascal Triangle Leetcode	5071
125	Minimum Cost For Tickets Leetcode Solution	5039
126	Postfix to Infix Conversion	5021
127	Page Replacement Algorithms in Operating Systems	5013
128	Build Array From Permutation Leetcode Solution	4988
129	Length of Last Word Leetcode Solution	4981
130	Kth largest element in an Array Leetcode Solutions	4973
131	Minimum Steps to reach target by a Knight	4946
132	Number of Provinces Leetcode Solution	4939
133	Increasing Triplet Subsequence LeetCode Solution	4929
134	Optimal Account Balancing LeetCode Solution	4904
135	Assign Cookies Leetcode Solution	4881
136	H-Index Leetcode Solution	4879
137	Implementation of Deque using Doubly Linked List	4866
138	Decode String Leetcode Solution	4849
139	Fibonacci Number LeetCode Solution	4831
140	Defanging an IP Address Leetcode Solution	4804
141	Generate Parentheses Leetcode Solution	4779
142	Robot Room Cleaner Leetcode Solution	4751
143	Remove Duplicates from Sorted Array II Leetcode Solution	4749
144	First Unique Character in a String LeetCode Solution	4746
145	Convert array into Zig-Zag fashion	4740
146	Subarray with Given Sum	4660
147	Swap Nodes in Pairs Leetcode Solutions	4640
148	Find Smallest Missing Number in a Sorted Array	4637
149	Pascal’s Triangle II Leetcode Solution	4634
150	Subarray Product Less Than K LeetCode Solution	4605
151	Check if the Elements of an Array are Consecutive	4605
152	Island Perimeter Leetcode Solution	4604
153	Bellman Ford Algorithm	4597
154	Guess Number Higher or Lower LeetCode Solution	4582
155	Length of the largest subarray with contiguous elements	4573
156	K-th Smallest Element in a Sorted Matrix	4568
157	KMP Algorithm	4559
158	Prefix to Infix Conversion	4558
159	Find the Missing Number	4532
160	Add Two Numbers II Leetcode Solution	4528
161	Find First and Last Position of Element in Sorted Array Leetcode Solution	4513
162	Coin Change 2 Leetcode Solution	4508
163	Last Stone Weight	4502
164	Max Consecutive Ones Leetcode Solution	4495
165	Lemonade Change Leetcode Solution	4493
166	Reverse Words in a String III LeetCode Solution	4487
167	Form Minimum Number from Given Sequence of D’s and I’s	4482
168	Majority Element II Leetcode Solution	4454
169	Capacity To Ship Packages Within D Days Leetcode Solution	4443
170	OSI Model	4440
171	Design Parking System Leetcode Solution	4431
172	First negative integer in every window of size k	4403
173	Find Pair with Given Difference	4403
174	Combinations Leetcode Solution	4400
175	String Compression	4379
176	Backspace String Compare	4362
177	Palindrome Linked List Leetcode Solution	4353
178	Remove Linked List Elements Leetcode Solution	4351
179	Delete middle element of a stack	4351
180	Iterative Implementation of Quick Sort	4351
181	Find All Duplicates in an Array LeetCode Solution	4339
182	Trapping Rain Water Leetcode Solution	4338
183	Remove Duplicates from Sorted List II LeetCode Solution	4331
184	Repeated Substring Pattern	4266
185	Word Ladder LeetCode Solution	4248
186	Break a Palindrome LeetCode Solution	4240
187	Subarray Sum Equals K LeetCode Solution	4231
188	Same Tree LeetCode Solution	4211
189	Monotonic Array LeetCode Solution	4204
190	Remove All Occurrences of a Substring LeetCode Solution	4200
191	Slowest Key Leetcode Solution	4192
192	Merge Sorted Array LeetCode Solution	4156
193	Continuous Subarray Sum LeetCode Solution	4151
194	Merge k Sorted Lists Leetcode Solution	4141
195	01 Matrix LeetCode Solution	4141
196	Find the Row with Maximum Number of 1’s	4118
197	Make The String Great Leetcode Solution	4108
198	Leetcode Permutations	4077
199	Find Peak Element LeetCode Solution	4067
200	Convert a Number to Hexadecimal Leetcode Solution	4060
201	Time Based Key-Value Store LeetCode Solution	4045
202	Second Most Repeated Word in a Sequence	4043
203	Number of Dice Rolls With Target Sum LeetCode Solution	4037
204	Rearrange given Array in Maximum Minimum Form	4032
205	The K Weakest Rows in a Matrix Leetcode Solution	4031
206	Valid Perfect Square Leetcode Solution	4020
207	Single Element in a Sorted Array LeetCode Solution	4009
208	Moving Average from Data Stream Leetcode Solution	4003
209	Delete Node in a Linked List Leetcode Solution	4002
210	Find N Unique Integers Sum up to Zero Leetcode Solution	4001
211	Kth Largest Element in a Stream Leetcode Solution	3997
212	Printing brackets in Matrix Chain Multiplication Problem	3997
213	Insert Delete GetRandom O(1) Leetcode Solution	3996
214	Target Sum	3992
215	Combination Sum	3984
216	Rotate List Leetcode Solution	3978
217	Find the Duplicate Element	3939
218	Top K Frequent Elements LeetCode Solution	3936
219	Max Area of Island	3933
220	Check If Two String Arrays are Equivalent Leetcode Solution	3930
221	Longest Common Subsequence LeetCode Solution	3928
222	Generate all Binary Strings Without Consecutive 1’s	3928
223	Subarray Sum Equals k	3925
224	Palindrome Number	3912
225	Maximum Product of Three Numbers LeetCode Solution	3902
226	Cuckoo sequence program	3899
227	Prefix to Postfix Conversion	3887
228	Reverse Only Letters LeetCode Solution	3876
229	LRU Cache LeetCode Solution	3864
230	Minimum Knight Moves LeetCode Solution	3853
231	Relative Sort Array Leetcode Solution	3848
232	Relative Ranks Leetcode Solution	3843
233	Find Leaders in an Array	3835
234	Number of Steps to Reduce a Number to Zero Leetcode Solution	3820
235	Find Triplet in Array With a Given Sum	3818
236	Flipping an Image LeetCode Solution	3814
237	Scramble String	3813
238	Letter Combinations of a Phone Number	3811
239	Count Good Nodes in Binary Tree Leetcode Solution	3809
240	Maximum Population Year LeetCode Solution	3777
241	Permutation in String Leetcode Solution	3767
242	Smallest Positive Number Missing in an Unsorted Array	3765
243	Unique Paths II Leetcode Solution	3760
244	The kth Factor of n Leetcode Solution	3745
245	Check If N and Its Double Exist Leetcode Solution	3724
246	Set Matrix Zeroes Leetcode Solution	3717
247	Stock Buy Sell to Maximize Profit	3717
248	Minimum swaps required to bring all elements less than or equal to k together	3705
249	N-Queens LeetCode Solution	3697
250	Top K Frequent Elements	3697
251	To Lower Case Leetcode Solution	3691
252	Arithmetic Expression Evaluation	3691
253	Maximum Subarray Sum using Divide and Conquer	3690
254	Given two unsorted arrays find all pairs whose sum is x	3687
255	Remove Minimum Characters so that Two Strings Become Anagrams	3685
256	Minimum Operations to convert X to Y	3684
257	Search Suggestions System LeetCode Solution	3657
258	Sum of Subarray Ranges Leetcode Solution	3632
259	Min Cost Climbing Stairs LeetCode Solution	3623
260	Student Attendance Record I Leetcode Solution	3621
261	Remove Duplicates from Sorted List LeetCode Solution	3574
262	Top K Frequent Words LeetCode Solution	3572
263	License Key Formatting Leetcode Solution	3572
264	Find the Number Occurring Odd Number of Times in an Array	3569
265	Maximize Distance to Closest Person LeetCode Solution	3563
266	Maximum Sum Increasing Subsequence	3562
267	Reformat Date LeetCode Solution	3527
268	Stone Game LeetCode	3520
269	Construct Binary Tree from Given Inorder and Preorder Traversals	3519
270	Next Permutation	3500
271	Prim’s Algorithm	3477
272	Most Frequent Element in an Array	3464
273	Find if Path Exists in Graph Leetcode Solution	3463
274	Minimum Characters to be Added at Front to Make String Palindrome	3447
275	Arrange given Numbers to Form the Biggest Number II	3445
276	Container With Most Water LeetCode Solution	3443
277	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	3440
278	Reverse words in a string	3438
279	Min Stack	3437
280	Minimum Path Sum Leetcode Solution	3435
281	Find any one of the multiple repeating elements in read only array	3433
282	Reverse individual words	3429
283	Implement a stack using single queue	3425
284	Count of index pairs with equal elements in an array	3410
285	Sort Elements by Frequency of Occurrences	3408
286	Design A Leaderboard Leetcode Solution	3404
287	BFS for Disconnected Graph	3399
288	Diagonal Traverse LeetCode Solution	3396
289	Evaluate Division	3393
290	Intersection of Two Arrays	3392
291	Maximum Depth of Binary Tree Leetcode Solution	3359
292	Spiral Matrix II Leetcode Solution	3356
293	Find Words That Can Be Formed by Characters Leetcode Solution	3355
294	Find The Duplicate Number	3343
295	Count Number of Occurrences in a Sorted Array	3340
296	Diagonal Traversal LeetCode Solution	3326
297	Special Array With X Elements Greater Than or Equal X Leetcode Solution	3322
298	Invalid Transactions LeetCode Solution	3316
299	Minimum number of Merge Operations to make an Array Palindrome	3316
300	Contains Duplicate LeetCode Solution	3304
301	Reveal Cards In Increasing Order Leetcode Solution	3304
302	House Robber	3292
303	Length of Longest valid Substring	3292
304	Best Time to Buy and Sell Stock III Leetcode Solution	3289
305	Longest Common Subsequence	3278
306	Least Number of Unique Integers after K Removals Leetcode Solution	3267
307	Remove Nth Node From End of List Leetcode Solution	3260
308	Last Stone Weight II LeetCode Solution	3252
309	Symmetric Tree Leetcode Solution	3241
310	Single Number	3239
311	Brightest Position on Street LeetCode Solution	3236
312	Maximum Size Subarray Sum Equals k Leetcode Solution	3231
313	Find Leaves of Binary Tree LeetCode Solution	3207
314	Special Positions in a Binary Matrix Leetcode Solution	3204
315	Robot Bounded In Circle LeetCode Solution	3201
316	Sudoku Solver	3196
317	Find the Closest Palindrome number	3184
318	Partition Labels LeetCode Solution	3177
319	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3174
320	Alien Dictionary LeetCode Solution	3170
321	N-th Tribonacci Number Leetcode Solution	3170
322	Construct BST from its given Level Order Traversal	3170
323	The Celebrity Problem	3170
324	Binary Tree Inorder Traversal LeetCode Solution	3163
325	Shortest Word Distance Leetcode Solution	3163
326	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3154
327	Range Sum Query 2D – Immutable Leetcode Solution	3145
328	Reverse Bits	3139
329	One Edit Distance LeetCode Solution	3136
330	Check whether Strings are K Distance Apart or Not	3122
331	Next Greater Element III LeetCode Solution	3116
332	Mobile Numeric Keypad Problem	3114
333	Invert Binary Tree LeetCode Solution	3111
334	Jump Game	3101
335	Count of Triplets With Sum Less than Given Value	3099
336	Round Robin Scheduling	3092
337	Find Duplicates in an Array in Most Efficient Way	3092
338	Next Permutation LeetCode Solution	3078
339	Pair of Positive Negative Values in an Array	3064
340	Remove All Ones With Row and Column Flips Leetcode Solution	3057
341	Sort Array By Parity II Leetcode Solution	3049
342	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3048
343	Find Winner on a Tic Tac Toe Game Leetcode Solution	3047
344	Clone Graph LeetCode Solution	3041
345	Minimum operation to make all elements equal in array	3034
346	Remove Invalid Parentheses Leetcode Solution	3027
347	Largest Rectangle in Histogram LeetCode Solution	3026
348	Regular Expression Matching Regular Expression Matching LeetCode Solution	3026
349	Partition Array Into Three Parts With Equal Sum Leetcode Solution	3022
350	Painting Fence Algorithm	3011
351	Merge Two Sorted Linked Lists	3009
352	Minimum Time Visiting All Points Leetcode Solution	2994
353	Find the First and Second Smallest Elements	2984
354	Maximal Square	2975
355	Find Top K (or Most Frequent) Numbers in a Stream	2970
356	Rank Transform of an Array Leetcode Solution	2968
357	Minimum Moves to Equal Array Elements Leetcode Solution	2965
358	Check if a given array contains duplicate elements within k distance from each other	2960
359	Find minimum difference between any two elements	2960
360	Reverse Nodes in k-Group LeetCode Solution	2959
361	Combination Sum IV LeetCode Solution	2959
362	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	2957
363	Tug of War	2957
364	Find the subarray with least average	2956
365	Sort a stack using a temporary stack	2955
366	Longest subarray not having more than K distinct elements	2952
367	String Matching in an Array Leetcode Solution	2943
368	Longest subsequence such that difference between adjacents is one	2937
369	Maximum Circular Subarray Sum	2932
370	Unique Paths	2928
371	Paint House LeetCode Solution	2924
372	Bitwise AND of Numbers Range LeetCode Solution	2924
373	Minimum Depth of Binary Tree Leetcode Solution	2924
374	Range Sum of BST LeetCode Solution	2923
375	K Empty Slots LeetCode	2920
376	LRU Cache Implementation	2920
377	Number of Smaller Elements on Right Side	2920
378	Design Browser History LeetCode Solution	2918
379	Maximum Number of Occurrences of a Substring Leetcode Solution	2916
380	Minimum Cost to Hire K Workers	2902
381	Longest Palindrome can be Formed by Removing or Rearranging Characters	2900
382	Path With Maximum Minimum Value LeetCode Solution	2897
383	Longest Common Prefix using Trie	2896
384	Dijkstra Algorithm	2896
385	Find the Smallest Divisor given a Threshold Leetcode Solution	2895
386	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	2892
387	Sliding Window Technique	2892
388	Smallest Subarray with k Distinct Numbers	2890
389	Ugly Number II LeetCode Solution	2889
390	Missing Element in Sorted Array LeetCode Solution	2888
391	LRU Cache Leetcode Solution	2884
392	Find Maximum Level sum in Binary Tree	2877
393	Minimize Maximum Pair Sum in Array LeetCode Solution	2874
394	Permutation Sequence LeetCode Solution	2872
395	Graph Valid Tree LeetCode Solution	2872
396	Integer Break LeetCode Solution	2872
397	First Circular Tour to Visit all the Petrol Bunks	2872
398	Hamming Distance Leetcode Solution	2871
399	Non-decreasing Array LeetCode Solution	2870
400	Split Linked List in Parts Leetcode Solution	2866
401	Common elements in all rows of a given matrix	2866
402	Number of Islands II LeetCode Solution	2863
403	Insert Interval Leetcode Solution	2859
404	Find the Peak Element from an Array	2850
405	Consecutive Characters LeetCode Solution	2839
406	Minimum Time to Collect All Apples in a Tree LeetCode Solution	2834
407	Given an Array of Pairs Find all Symmetric Pairs in it	2828
408	Queries for counts of array elements with values in given range	2828
409	Unique Paths III LeetCode Solution	2822
410	Transpose Graph	2822
411	K Closest Points to Origin Leetcode Solution	2818
412	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	2818
413	Find duplicates in a given array when elements are not limited to a range	2814
414	Invert Binary Tree LeetCode Solution	2813
415	Number of Closed Islands Leetcode Solution	2806
416	Max stack	2799
417	Priority Queue using doubly linked list	2799
418	Implementation of Deque using circular array	2791
419	Minesweeper LeetCode Solution	2780
420	Move All the Zeros to the End of the Given Array	2777
421	Stone Game II Leetcode	2773
422	Maximum Consecutive Numbers Present in an Array	2766
423	Sort elements by frequency	2761
424	Decompress Run-Length Encoded List Leetcode Solution	2759
425	Convert Sorted Array to Binary Search Tree LeetCode Solutions	2753
426	Replace Elements with Greatest Element on Right Side Leetcode Solution	2749
427	Odd Even Linked List Leetcode Solution	2745
428	Top View of Binary Tree	2745
429	Stack Permutations (Check if an array is stack permutation of other)	2744
430	Nth Catalan Number	2744
431	Expression Contains Redundant Bracket or Not	2743
432	Restore IP Addresses Leetcode Solution	2742
433	Word Search	2742
434	Design a stack that supports getMin() in O(1) time and O(1) extra space	2741
435	Toeplitz Matrix	2734
436	Binary Tree Maximum Path Sum LeetCode Solution	2731
437	Is Graph Bipartite? LeetCode Solution	2730
438	Sorting array using Stacks	2724
439	Longest Common Prefix using Sorting	2716
440	Partition List Leetcode Solution	2715
441	Kth Smallest Element in a BST Leetcode Solution	2713
442	Can Make Arithmetic Progression From Sequence Leetcode Solution	2713
443	Snakes and Ladders LeetCode Solution	2711
444	Priority Queue in C++	2709
445	Maximum Subarray	2709
446	Integer to English words	2704
447	Validate Stack Sequences LeetCode Solution	2695
448	Reverse a linked list	2695
449	Gold Mine Problem	2694
450	Path Sum II LeetCode Solution	2693
451	Rearrange array such that even positioned are greater than odd	2692
452	Vertical Order Traversal of Binary Tree LeetCode Solution	2682
453	Flood Fill LeetCode	2681
454	Recursion	2679
455	Minimum Absolute Difference in BST Leetcode Solution	2672
456	Count Submatrices With All Ones LeetCode Solution	2671
457	Palindrome Substring Queries	2670
458	Kth Non-repeating Character	2664
459	Multiplication of Two Matrices	2658
460	Sequences of given length where every element is more than or equal to twice of previous	2655
461	Number of Days Between Two Dates LeetCode Solution	2654
462	Find a Peak Element II LeetCode Solution	2653
463	Search a 2D Matrix II Leetcode Solution	2647
464	Longest Substring with At Most K Distinct Characters LeetCode Solution	2646
465	Number Complement Leetcode Solution	2643
466	Cells with Odd Values in a Matrix LeetCode Solution	2640
467	How to Implement Stack Using Priority Queue or Heap?	2638
468	Find a Fixed Point in a Given Array	2636
469	Longest Increasing Path in a Matrix LeetCode Solution	2632
470	Minimum Path Sum	2626
471	Find All Possible Recipes from Given Supplies LeetCode Solution	2623
472	Queries for GCD of all numbers of an array except elements in a given range	2618
473	Reorder Data in Log Files LeetCode Solution	2613
474	Majority Element	2613
475	Intersection of Two Linked Lists LeetCode Solution	2612
476	Shortest Completing Word Leetcode Solution	2605
477	Convert Sorted Array to Binary Search Tree Leetcode Solution	2605
478	Distance of nearest cell having 1 in a binary matrix	2605
479	Search in a Binary Search Tree Leetcode Solution	2604
480	Kruskal Algorithm	2604
481	Best Time to Buy and Sell Stock	2595
482	Detect a loop in the Linked List	2595
483	Trapping Rain Water LeetCode Solution	2591
484	Insert into a Binary Search Tree Leetcode Solution	2578
485	Scramble String LeetCode Solution	2576
486	Find Pythagorean Triplets from Array	2575
487	Design Hit Counter LeetCode Solution	2572
488	4Sum	2571
489	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	2569
490	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	2568
491	Merge Two Binary Trees LeetCode Solution	2566
492	Shortest Palindrome	2566
493	High Five LeetCode Solution	2563
494	Largest rectangular sub-matrix whose sum is 0	2563
495	The Stock Span Problem	2561
496	Find Median from Data Stream LeetCode Solution	2558
497	Tiling Problem	2556
498	Balanced Expression with Replacement	2553
499	Insert Node in the Sorted Linked List	2549
500	Generate all Binary Strings from Given Pattern	2548
501	Postfix to Prefix Conversion	2547
502	Check if Two given Strings are Isomorphic to each other	2545
503	Implement Trie (Prefix Tree) Leetcode Solution	2541
504	Divide Chocolate LeetCode Solution	2539
505	Custom Sort String Leetcode Solution	2535
506	Find Minimum in Rotated Sorted Array II LeetCode Solution	2534
507	Check If Array Pairs Are Divisible by k LeetCode Solution	2525
508	Race Car LeetCode Solution	2516
509	Guess Number Higher or Lower II	2516
510	Longest Common Prefix using Divide and Conquer	2515
511	Pancake Sorting Problem	2515
512	Camelcase Matching Leetcode Solution	2514
513	Kth ancestor of a node in binary tree	2510
514	Interval Tree	2510
515	Find the Minimum Element in a Sorted and Rotated Array	2503
516	The Maze III LeetCode Solution	2502
517	Substring with Concatenation of All Words Leetcode Solution	2498
518	Evaluate Reverse Polish Notation LeetCode Solution	2498
519	Largest Subarray with Equal Number of 0’s and 1’s	2497
520	Palindrome Permutation LeetCode Solution	2495
521	Count subarrays having total distinct elements same as original array	2495
522	Spiral Matrix III LeetCode Solution	2493
523	Print all Palindromic Partitions of a String	2493
524	Check if Array Contains Contiguous Integers With Duplicates Allowed	2492
525	Letter Case Permutation	2490
526	Sliding Window Maximum LeetCode Solution	2477
527	Sort Colors	2473
528	Sieve of Eratosthenes	2470
529	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	2468
530	LCS (Longest Common Subsequence) of three strings	2467
531	Count Possible Triangles	2465
532	Find the first Repeating Number in a Given Array	2463
533	Merge Overlapping Intervals	2462
534	Convert BST to Min Heap	2459
535	Maximum Sum of Non Consecutive Elements	2459
536	Sliding Window Median Leetcode Solution	2457
537	Analyze User Website Visit Pattern LeetCode Solution	2456
538	Fibonacci numbers	2454
539	Sort an array according to the order defined by another array	2446
540	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	2445
541	3 Sum	2435
542	How to Create Mergable Stack?	2432
543	Minimum Bracket Reversals	2431
544	Find a Sorted Subsequence of size 3	2427
545	Decode String	2423
546	Longest Repeated Subsequence	2420
547	Maximum Length of Chain Pairs	2418
548	Edit Distance LeetCode Solution	2415
549	Coin Change Problem	2411
550	Minimum Jumps to Reach Home LeetCode Solution	2409
551	Iterative Method to find Height of Binary Tree	2408
552	Maximum Element in an Array which is Increasing and then Decreasing	2408
553	Minimum Height Trees	2406
554	Group Anagrams	2405
555	Jump Game IV LeetCode Solution	2403
556	Perfect Squares LeetCode Solution	2402
557	Longest Substring with At Least K Repeating Characters LeetCode Solution	2399
558	Maximum Number of Ways to Partition an Array LeetCode Solution	2397
559	Implement Two Stacks in an Array	2396
560	N queen problem	2393
561	Path Crossing Leetcode Solution	2389
562	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2383
563	Recover Binary Search Tree Leetcode Solution	2381
564	Different Ways to Add Parentheses Leetcode Solution	2379
565	Find the Lost Element From a Duplicated Array	2378
566	Number of Distinct Islands Leetcode Solution	2377
567	Decode Ways	2376
568	Find maximum length Snake sequence	2374
569	K-th Distinct Element in an Array	2369
570	Fibonacci Number LeetCode Solution	2363
571	Shifting Letters LeetCode Solution	2363
572	Build an Array With Stack Operations Leetcode Solution	2361
573	Subarrays with K Different Integers Leetcode Solution	2350
574	Champagne Tower LeetCode Solution	2349
575	Rectangle Overlap LeetCode Solution	2348
576	Nearest Exit from Entrance in Maze LeetCode Solution	2343
577	Subset sum problem	2338
578	Sorted Linked List to Balanced BST	2336
579	Most Stones Removed with Same Row or Column LeetCode Solution	2332
580	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	2328
581	Find if an Expression has Duplicate Parenthesis or Not	2328
582	Contains Duplicate	2325
583	Count items common to both the lists but with different prices	2323
584	First missing positive	2322
585	Find the two Numbers with Odd Occurrences in an Unsorted Array	2319
586	Palindrome Partitioning Leetcode Solution	2311
587	Valid Boomerang Leetcode Solution	2309
588	Sort a stack using recursion	2308
589	Find Largest Value in Each Tree Row LeetCode Solution	2302
590	Queue based approach for first non-repeating character in a stream	2301
591	Minimum Height Trees LeetCode Solution	2298
592	Monotonic Array Leetcode Solution	2297
593	Possible Bipartition LeetCode Solution	2294
594	Design a Stack With Increment Operation Leetcode Solution	2285
595	Number of Equivalent Domino Pairs Leetcode Solution	2285
596	Palindrome Permutations of a String	2282
597	Palindromic Substrings Leetcode Solution	2281
598	Sliding Window Maximum	2277
599	Contiguous Array LeetCode Solution	2272
600	Merge Overlapping Intervals II	2269
601	Sort a String According to Another String	2266
602	Distance Between Bus Stops Leetcode Solution	2263
603	Reorder an Array According to the Given Indexes	2261
604	Rearrange Spaces Between Words Leetcode Solution	2255
605	Word Break	2255
606	Find the Town Judge LeetCode Solution	2254
607	Maximum Frequency Stack Leetcode Solution	2249
608	Merge Two Balanced Binary Search Trees	2246
609	Best Meeting Point LeetCode Solution	2243
610	Detect Capital Leetcode Solution	2236
611	Number of palindromic paths in a matrix	2234
612	Morris Traversal	2230
613	Recover Binary Search Tree	2225
614	Valid Parentheses Leetcode Solution	2224
615	Find the Subarray of given length with Least Average	2222
616	Swapping Nodes in a Linked List Leetcode Solution	2221
617	Maximum sum rectangle in a 2D matrix	2221
618	Perform String Shifts Leetcode	2217
619	Maximum Depth of N-ary Tree Leetcode Solution	2215
620	Find Median from data Stream	2210
621	Caesar Cipher	2209
622	Construction of Longest Increasing Subsequence (N log N)	2200
623	Maximum Score After Splitting a String Leetcode Solution	2193
624	Check if the given array can represent Level Order Traversal of Binary Search Tree	2191
625	Maximum Product of Splitted Binary Tree LeetCode Solution	2189
626	Minimum number of jumps to reach end	2189
627	Merge K Sorted Arrays and Print Sorted Output	2184
628	Queue using Stacks	2181
629	All Possible Full Binary Trees LeetCode Solution	2178
630	Maximize Elements Using Another Array	2171
631	Brick Wall LeetCode Solution	2170
632	Pair with given product	2170
633	A Space Optimized DP solution for 0-1 Knapsack Problem	2168
634	Reach a Number LeetCode Solution	2167
635	Smallest Good Base	2167
636	Implement strStr() LeetCode Solution	2165
637	Binary Tree zigzag level order Traversal	2163
638	Find First and Last Position of Element in Sorted Array LeetCode Solution	2160
639	Find the First Circular Tour that visits all the Petrol Pumps	2157
640	Palindrome Permutation	2155
641	Mean of Array After Removing Some Elements Leetcode Solution	2152
642	Word Pattern	2151
643	My Calendar I LeetCode Solution	2140
644	Split Array Into Consecutive Subsequences	2134
645	Maximum Number of Chocolates to be Distributed Equally Among k Students	2133
646	Valid Sudoku	2128
647	Check if a Linked list of Strings form a Palindrome	2122
648	How to Efficiently Implement k Stacks in a Single Array?	2119
649	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2112
650	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2110
651	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2108
652	Find all pairs (a, b) in an array such that a % b = k	2108
653	Binary Tree Right Side View LeetCode Solution	2104
654	Populating Next Right Pointers in Each Node Leetcode Solution	2104
655	Count pair with Given Sum	2103
656	Convert Sorted List to Binary Search Tree	2103
657	Check if String Follows Order of Characters by a Pattern or not	2093
658	Minimum Sum Path in a Triangle	2090
659	Add two numbers	2084
660	Web Crawler LeetCode Solution	2082
661	Remove brackets from an algebraic string containing + and – operators	2082
662	Largest Sum Contiguous Subarray	2082
663	Best Time to Buy and Sell Stock IV LeetCode Solution	2077
664	Huffman Coding	2077
665	Design Skiplist LeetCode Solution	2072
666	Length of Longest Fibonacci Subsequence	2070
667	Count ways to reach the nth stair using step 1, 2 or 3	2067
668	Segregate 0s and 1s in an Array	2061
669	Minimum Swaps to Group All 1’s Together Leetcode Solution	2060
670	Print all subarrays with 0 sum	2060
671	Print Fibonacci sequence using 2 variables	2060
672	Find whether a subarray is in form of a mountain or not	2057
673	Concatenation of Array LeetCode Solution	2056
674	Count Sub Islands LeetCode Solution	2051
675	Minimum time required to rot all oranges	2050
676	Arithmetic Slices II – Subsequence LeetCode Solution	2045
677	Populating Next Right Pointers in Each Node	2043
678	Longest Subarray Having Count of 1s One More than Count of 0s	2039
679	Construct BST from given Preorder Traversal	2039
680	Find Maximum of Minimum for Every Window Size in a Given Array	2031
681	Partition to K Equal Sum Subsets Leetcode Solution	2027
682	All Unique Triplets that Sum up to a Given Value	2027
683	Find four elements that sum to a given value (Hashmap)	2026
684	Elements Appear more than N/K times in Array	2025
685	Sort 0s 1s and 2s in an Array	2024
686	Counting Bits	2022
687	Isomorphic Strings LeetCode Solution	2021
688	Remove Palindromic Subsequences Leetcode Solution	2018
689	Level order Traversal in Spiral Form	2016
690	Range Sum Query 2D – Immutable LeetCode Solution	2015
691	Swap Kth Node from beginning with Kth Node from End	2010
692	Finding K closest element	2008
693	Partition Problem	2008
694	Count Distinct Elements in Every Window of Size K	2000
695	Validate Binary Search Tree	1997
696	Find all triplets with zero sum	1996
697	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	1994
698	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	1991
699	Check for Balanced Parentheses in an Expression	1990
700	Heap Sort	1989
701	Maximize Sum of Array after K Negations Leetcode Solution	1986
702	Bubble sort using two Stacks	1984
703	Difference Array \| Range update query in O(1)	1974
704	Nested List Weight Sum II LeetCode Solution	1957
705	Count Minimum Steps to Get the given Array	1955
706	Find All Pairs With a Given Difference	1953
707	Find Duplicate Subtrees	1948
708	String comparison containing wildcards	1946
709	Contiguous Array Leetcode	1935
710	Binary Tree to Binary Search Tree Conversion	1932
711	MiniMax Algorithm	1929
712	Maximum Distance in Array	1926
713	Happy Number	1926
714	Linked List Cycle	1926
715	Rearrange an Array Such that arr[i] is equal to i	1922
716	Reorder Array Using Given Indexes	1916
717	Reverse Nodes in K-Group	1914
718	Maximum Product Subarray II	1914
719	Increasing Subsequence of Length three with Maximum Product	1914
720	Merge K Sorted Linked Lists	1912
721	Sum Root to Leaf Numbers LeetCode Solution	1908
722	Inorder Successor of a node in Binary Tree	1899
723	Parallel Courses II LeetCode Solution	1898
724	Symmetric Tree	1897
725	Root to Leaf path with target sum Leetcode Solutions	1894
726	Container with Most Water	1891
727	Maximum difference between two elements such as larger element comes after smaller	1891
728	Longest Increasing Subsequence	1890
729	Merge Two Sorted Lists Leetcode	1888
730	Alien Dictionary	1885
731	Check if Two Expressions With Brackets are Same	1883
732	Rotate Array	1881
733	Check if any two intervals overlap among a given set of intervals	1880
734	An Interesting Method to generate Binary Numbers from 1 to n	1879
735	Minimum Distance Between BST Nodes Leetcode Solution	1878
736	Queue Reconstruction by Height	1878
737	Union and Intersection of two Linked Lists	1873
738	Iterative Depth First Traversal of Graph	1868
739	Longest Common Prefix Using Binary Search II	1868
740	K maximum sums of overlapping contiguous sub-arrays	1866
741	Flatten 2D Vector LeetCode Solution	1862
742	Count Good Nodes in Binary Tree LeetCode Solution	1860
743	Find pairs with given sum such that elements of pair are in different rows	1860
744	Minimum Swaps to Make Strings Equal Leetcode Solution	1859
745	Delete Nth node from the end of the given linked list	1859
746	Climbing stairs	1858
747	Score of Parenthesis LeetCode Solution	1855
748	Minimum Cost to Move Chips to The Same Position LeetCode Solution	1850
749	Substring With Concatenation Of All Words	1847
750	Queries on Probability of Even or Odd Number in given Ranges	1845
751	Find the first repeating element in an array of integers	1841
752	Smallest Range II Leetcode Solution	1839
753	Kill Process LeetCode Solution	1837
754	Breadth First Search (BFS) for a Graph	1835
755	Find subarray with given sum (Handles Negative Numbers)	1832
756	Print a Binary Tree in Vertical Order	1832
757	Delete Nodes and Return Forest Leetcode Solution	1830
758	Longest Common Prefix Word by Word Matching	1829
759	Merging Intervals	1818
760	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	1817
761	Iterative Preorder Traversal	1815
762	Remove duplicates from sorted array	1811
763	Check if a queue can be sorted into another queue using a stack	1809
764	New 21 Game	1807
765	Minimum Size Subarray Sum	1786
766	Peak Index in a Mountain Array LeetCode Solution	1784
767	Valid Parenthesis String	1784
768	Range LCM Queries	1781
769	Maximum size subarray sum equals k	1781
770	Find K Closest Elements LeetCode Solution	1780
771	Vertical sum in a given binary tree	1775
772	Sorting a K Sorted Array	1774
773	Friends Of Appropriate Ages LeetCode Solution	1771
774	Find Maximum Sum Possible Equal Sum of Three Stacks	1766
775	Construct Binary Tree from given Parent Array representation	1764
776	Sort Array by Increasing Frequency Leetcode Solution	1761
777	Find the Difference Leetcode Solution	1761
778	Matrix Chain Multiplication	1760
779	Verify Preorder Serialization of a Binary Tree	1758
780	Find Sum of all unique sub-array sum for a given array	1750
781	Minimum Number of Arrows to Burst Balloons LeetCode Solution	1744
782	Count pairs from two linked lists whose sum is equal to a given value	1744
783	Minimum Remove to Make Valid Parentheses LeetCode Solution	1741
784	Find K Length Subarray of Maximum Average	1741
785	Check if a given array can represent Preorder Traversal of Binary Search Tree	1740
786	Non-overlapping sum of two sets	1737
787	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	1734
788	Defanging an IP Address LeetCode Solution	1734
789	Reservoir Sampling	1732
790	Maximum Product Subarray	1730
791	Find Three Element From Different Three Arrays Such That a + b + c = sum	1729
792	Valid Anagrams	1725
793	Boolean Parenthesization Problem	1723
794	Deletion in a Binary Tree	1721
795	The Painter’s Partition Problem	1720
796	Remove Duplicates from Sorted List II	1719
797	Flatten Binary Tree to Linked List LeetCode Solution	1717
798	Number of siblings of a given Node in n-ary Tree	1717
799	Sum of f(a[i], a[j]) over all pairs in an array of n integers	1713
800	Print All Distinct Elements of a Given Integer Array	1713
801	Boundary Traversal of binary tree	1711
802	Given a binary tree, how do you remove all the half nodes?	1707
803	Employee Importance LeetCode Solution	1699
804	Find the largest multiple of 3	1698
805	Isomorphic Strings	1697
806	Unique Binary Search Trees	1694
807	Partition Equal Subset Sum	1690
808	Check Completeness of a Binary Tree LeetCode Solution	1689
809	Count and Say	1688
810	Closest Leaf in a Binary Tree LeetCode Solution	1686
811	Count number of triplets with product equal to given number	1683
812	Pancake Sorting	1681
813	Median of Two Sorted Arrays	1679
814	Level of Each node in a Tree from source node	1679
815	Infix to Postfix	1674
816	Level order traversal using two Queues	1673
817	Largest BST Subtree LeetCode Solution	1672
818	Print all triplets in sorted array that form AP	1671
819	Tree Traversal (Preorder, Inorder & Postorder)	1671
820	Find Peak Element	1670
821	Distinct Subsequences	1668
822	Products of ranges in an array	1667
823	Hamming Distance	1667
824	Third Maximum Number Leetcode Solution	1662
825	Maximum subsequence sum such that no three are consecutive	1660
826	Find Element Using Binary Search in Sorted Array	1660
827	Longest Palindromic Subsequence	1654
828	Bold Words in String LeetCode Solution	1652
829	Subset Sum Problem in O(sum) space	1652
830	Find distance between two nodes of a Binary Tree	1650
831	Unique Binary Search Trees LeetCode Solution	1649
832	Largest divisible pairs subset	1644
833	Array Nesting Leetcode Solution	1642
834	Create Maximum Number	1639
835	Find Nth Node	1638
836	Palindrome Partitioning	1636
837	BFS vs DFS for Binary Tree	1636
838	Super Ugly Number	1633
839	Find Common Characters Leetcode Solution	1631
840	Valid Number	1627
841	Four Elements that Sum to Given	1627
842	Largest Submatrix With Rearrangements LeetCode Solution	1625
843	Kth Smallest Element in a Sorted Matrix LeetCode Solution	1618
844	Minimum insertions to form a palindrome with permutations allowed	1615
845	Binary array after M range toggle operations	1614
846	Missing Number	1614
847	Maximum number of segments of lengths a, b and c	1613
848	Serialize and Deserialize Binary Tree LeetCode Solution	1606
849	Valid Triangle Number LeetCode Solution	1605
850	Lowest Common Ancestor	1605
851	Compare Strings by Frequency of the Smallest Character Leetcode Solution	1604
852	Transform a BST to Greater sum Tree	1603
853	Maximum Population Year LeetCode Solution	1600
854	Shuffle an Array	1599
855	Newman-Conway Sequence	1596
856	Sort Elements by Frequency II	1596
857	Check if two nodes are on the same path in a Tree	1591
858	Number Of Longest Increasing Subsequence	1591
859	Next Greater Element in an Array	1590
860	Find Smallest Range Containing Elements from k Lists	1587
861	Binary Tree Longest Consecutive Sequence LeetCode Solution	1580
862	Sentence Screen Fitting LeetCode Solution	1579
863	Insert Delete GetRandom	1578
864	Trapping Rain Water II LeetCode Solution	1577
865	Balanced Binary Tree	1577
866	Next Greater Element II LeetCode Solution	1574
867	Integer to Roman	1570
868	Averages of Levels in Binary Tree	1569
869	Maximum Sum of 3 Non-Overlapping Subarrays	1568
870	Minimum sum of squares of character counts in a given string after removing k characters	1555
871	Path Sum	1555
872	Arrange given numbers to form the biggest number	1554
873	First Bad Version	1554
874	Largest subarray with equal number of 0s and 1s	1553
875	Encoded String With Shortest Length LeetCode Solution	1551
876	Check if all levels of two Binary Tree are anagrams or not	1551
877	Merging Two Sorted Arrays	1551
878	Closest Binary Search Tree Value Leetcode Solution	1550
879	Height of a generic tree from parent array	1548
880	Stone Game IV LeetCode Solution	1545
881	Merge Two Sorted Arrays	1542
882	Valid Triangle Number LeetCode Solution	1541
883	Stone Game IV LeetCode Solution	1538
884	Topological Sorting	1538
885	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	1534
886	Kth Smallest Number in Multiplication Table Leetcode Solution	1534
887	Contiguous Array	1530
888	Count Primes in Ranges	1528
889	Permutations of a Given String Using STL	1528
890	Red-Black Tree Introduction	1527
891	Lower Case To Upper Case	1525
892	Range Minimum Query (Square Root Decomposition and Sparse Table)	1517
893	Reorganize String	1513
894	Diameter of N-Ary Tree LeetCode Solution	1507
895	Print Right View of a Binary Tree	1504
896	Bottom View of a Binary Tree	1502
897	Friends Pairing Problem	1500
898	Find minimum number of merge operations to make an array palindrome	1500
899	Find unique character in a string	1500
900	Iterative Postorder Traversal Using Two Stacks	1498
901	Maximum difference between first and last indexes of an element in array	1496
902	Orderly Queue LeetCode Solution	1494
903	Find Largest d in Array such that a + b + c = d	1493
904	Level Order Traversal of Binary Tree	1492
905	Find Minimum In Rotated Sorted Array	1490
906	Minimum Swaps To Make Sequences Increasing LeetCode Solution	1489
907	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	1485
908	Diagonal Traversal of Binary Tree	1481
909	Longest Bitonic Subsequence	1479
910	Constant time range add operation on an array	1476
911	Swap Nodes In Pairs	1473
912	Total Hamming Distance LeetCode Solution	1471
913	Reverse a Path in BST using Queue	1469
914	Valid Perfect Square LeetCode Solution	1467
915	Serialize and Deserialize Binary Tree	1466
916	Binary Search Tree Delete Operation	1464
917	Next greater element	1462
918	Largest Plus Sign Leetcode Solution	1461
919	Koko Eating Bananas LeetCode Solution	1457
920	Range Sum Query using Sparse Table	1451
921	Count the Pairs at Same Distance as in English Alphabets	1450
922	Segment Tree	1448
923	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	1443
924	Best Meeting Point LeetCode Solution	1443
925	Maximum Product Subarray	1439
926	Binary Search Tree Search and Insertion	1430
927	Valid Tic-Tac-Toe State LeetCode Solution	1429
928	Longest Substring Without Repeating Characters Leetcode Solution	1426
929	A program to check if a binary tree is BST or not	1424
930	Edit Distance	1424
931	Maximum Product Subarray	1421
932	Advantages of BST over Hash Table	1420
933	Find the smallest binary digit multiple of given number	1419
934	The Number of Weak Characters in the Game LeetCode Solution	1410
935	Maximum difference between frequency of two elements such that element having greater frequency is also greater	1400
936	Convert BST into a Min-Heap without using array	1400
937	Maximum Sum Increasing Subsequence	1399
938	Group Shifted Strings Leetcode Solution	1398
939	Shuffle a given Array	1397
940	Longest Increasing Consecutive Subsequence	1390
941	Design Add and Search Words Data Structure LeetCode Solution	1386
942	Array Queries for multiply replacements and product	1386
943	K’th Largest element in BST using constant extra space	1379
944	Image Overlap LeetCode Solution	1378
945	Greatest Sum Divisible by Three LeetCode Solution	1377
946	Priority Queue	1377
947	Dividing Array into Pairs With Sum Divisible by K	1374
948	Print Next Greater Number of Q queries	1371
949	Design Underground System Leetcode Solution	1368
950	Print n terms of Newman-Conway Sequence	1366
951	Write a function to get the intersection point of two Linked Lists	1365
952	Collect maximum points in a grid using two traversals	1365
953	Find the node with minimum value in a Binary Search Tree	1362
954	Construct Complete Binary Tree from its Linked List Representation	1359
955	Range Queries for Longest Correct Bracket Subsequence	1358
956	Factorial Trailing Zeroes LeetCode Solution	1349
957	Check if an Array is Stack Sortable	1349
958	Merge Sort	1349
959	Insert into a Sorted Circular Linked List LeetCode Solution	1344
960	Queries on XOR of greatest odd divisor of the range	1343
961	Swim in Rising Water LeetCode Solution	1341
962	Guess The Word	1341
963	Form Minimum Number From Given Sequence	1340
964	Lowest Common Ancestor in Binary Search Tree	1340
965	Sorted Array to Balanced BST	1330
966	Numbers with prime frequencies greater than or equal to k	1329
967	Print modified array after multiple array range increment operations	1326
968	Power of Two	1326
969	Find postorder traversal of BST from preorder traversal	1325
970	Clone a Binary Tree with Random Pointers	1325
971	K’th Largest Element in BST when modification to BST is not allowed	1323
972	Maximum Array from Two given Arrays Keeping Order Same	1319
973	Write Code to Determine if Two Trees are Identical	1317
974	Moving Stones Until Consecutive Leetcode Solution	1315
975	Form minimum number from given sequence	1315
976	Longest Common Prefix using Character by Character Matching	1314
977	Excel Sheet Column Number LeetCode Solution	1313
978	Print all Possible Ways to Break a String in Bracket Form	1310
979	Queries for Number of Distinct Elements in a Subarray	1305
980	Merge Sorted Array	1303
981	Check for Palindrome after every character replacement Query	1299
982	K Empty Slots	1290
983	Count and Toggle Queries on a Binary Array	1288
984	Check if each internal node of a BST has exactly one child	1279
985	Cutting a Rod	1278
986	Count even length binary sequences with same sum of first and second half bits	1275
987	Decrease Elements To Make Array Zigzag LeetCode Solution	1274
988	Search in Sorted Rotated Array	1270
989	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1269
990	Find Maximum Depth of Nested Parenthesis in a String	1266
991	Number of elements less than or equal to a given number in a given subarray	1262
992	Closest Binary Search Tree Value II LeetCode Solution	1258
993	Find maximum average subarray of k length	1256
994	Check if X can give change to every person in the Queue	1255
995	Queries for Decimal Values of Subarrays of a Binary Array	1253
996	Number of Orders in the Backlog Leetcode Solution	1248
997	Binary Search Tree	1248
998	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1246
999	Kth Smallest Element in a BST	1244
1000	Print Ancestors of a Given Binary Tree Node Without Recursion	1242
1001	Count Pairs Whose Products Exist in Array	1237
1002	Minimum Moves to Equal Array Elements LeetCode Solution	1235
1003	Unique Paths II	1235
1004	Merge two BSTs with limited extra space	1235
1005	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1221
1006	Regular Expression Matching	1221
1007	Symmetric Tree LeetCode Solution Leetcode Solution	1214
1008	Sum of Left Leaves LeetCode Solution	1209
1009	Shortest Unsorted Continuous Subarray LeetCode Solution	1202
1010	Maximum weight transformation of a given string	1202
1011	How to print maximum number of A’s using given four keys	1200
1012	Graph Cloning	1194
1013	Random Pick Index LeetCode Solution	1182
1014	Maximum Depth Of Binary Tree	1176
1015	Palindrome Partitioning	1175
1016	Excel Sheet Column Title LeetCode Solution	1172
1017	Search an Element in Sorted Rotated Array	1158
1018	Data Structure Designing	1148
1019	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1147
1020	Check given array of size n can represent BST of n levels or not	1142
1021	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1141
1022	Iterative method to find ancestors of a given binary tree	1133
1023	Next Greater Element I Leetcode Solution	1107
1024	Maximum Binary Tree	1103
1025	Binary Tree to Binary Search Tree Conversion using STL set	1080
1026	Find k-th smallest element in BST (Order Statistics in BST)	1070
1027	Find the Town Judge LeetCode Solution	1065
1028	Print Maximum Length Chain of Pairs	1020
1029	Peeking Iterator LeetCode Solution	1012
1030	Flatten Binary Tree to Linked List LeetCode Solution	999
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	988