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	33773
2	Maximum occurring character in a string	17686
3	Plus One Leetcode Solution	16434
4	Valid Parentheses LeetCode Solution	15812
5	3Sum Leetcode Solution	13396
6	First Repeating Element	13130
7	Single Number Leetcode Solution	12184
8	Pow(x, n) Leetcode Solution	11617
9	Sqrt(x) Leetcode Solution	11322
10	Merge Sorted Arrays Leetcode Solution	11078
11	Meeting Rooms II LeetCode Solution	10929
12	Concatenation of Array LeetCode Solution	10347
13	Contains Duplicate II Leetcode Solution	9932
14	Roman to Integer Leetcode Solution	9773
15	Count Primes Leetcode Solutions	9735
16	Palindrome Number LeetCode Solution	9567
17	Search Insert Position Leetcode Solution	9558
18	Valid Palindrome Leetcode Solution	9365
19	Reverse Vowels of a String Leetcode Solution	9196
20	Jump Game Leetcode Solution	8894
21	Intersection of Two Arrays II Leetcode Solution	8801
22	Kids With the Greatest Number of Candies Leetcode Solution	8654
23	House Robber Leetcode Solution	8600
24	Number of Good Pairs Leetcode Solution	8557
25	Spiral Matrix LeetCode Solution	8556
26	Find the Maximum Repeating Number in Array	8482
27	Text Justification LeetCode Solution	8474
28	Add Binary Leetcode Solution	8427
29	Longest Substring Without Repeating Characters LeetCode Solution	8186
30	Number Of 1 bits	7993
31	Longest Palindromic Substring LeetCode Solution	7950
32	Jewels and Stones Leetcode Solution	7931
33	Power of Two Leetcode Solution	7863
34	Maximum Subarray Leetcode Solution	7747
35	Permutations Leetcode Solution	7663
36	Shuffle String Leetcode Solution	7613
37	Find All Numbers Disappeared in an Array Leetcode Solution	7565
38	Daily Temperatures Leetcode Solution	7481
39	Min Stack Leetcode Solution	7427
40	Kth Missing Positive Number Leetcode Solution	7357
41	Maximum Profit in Job Scheduling Leetcode Solution	7347
42	Next Permutation Leetcode Solution	7335
43	Frog Jump Leetcode Solution	7293
44	Running Sum of 1d Array Leetcode Solution	7283
45	Longest Common Prefix Leetcode Solution	7278
46	Move Zeroes LeetCode Solution	7263
47	Number of Islands LeetCode Solution	7260
48	Word Search Leetcode Solution	7243
49	Third Maximum Number Leetcode Solution	7159
50	Find Minimum Distance Between Two Numbers in an Array	7098
51	Rotate Image LeetCode Solution	6950
52	Bulb Switcher LeetCode Solution	6903
53	Combination Sum Leetcode Solution	6891
54	Next Greater Element I Leetcode Solution	6882
55	Median of Two Sorted Arrays LeetCode Solution	6862
56	Can Place Flowers LeetCode Solution	6836
57	Shuffle the Array Leetcode Solution	6835
58	Remove Duplicates from Sorted Array Leetcode Solution	6828
59	3Sum Closest LeetCode Solution	6787
60	Multiply Strings Leetcode Solution	6742
61	Search in Rotated Sorted Array Leetcode Solution	6697
62	House Robber II Leetcode Solution	6676
63	Reverse String Without Temporary Variable	6628
64	Count and Say Leetcode Solution	6622
65	Strobogrammatic Number LeetCode Solution	6602
66	Missing Number Leetcode Solution	6598
67	Valid Anagram Leetcode Solution	6500
68	Subarray and Subsequence	6476
69	Excel Sheet Column Title Leetcode Solution	6422
70	Integer to Roman Leetcode Solution	6400
71	Isomorphic Strings Leetcode Solution	6375
72	Count Pairs With Given Sum	6347
73	Evaluation of Postfix Expression	6340
74	Koko Eating Bananas Leetcode Solution	6308
75	Product of array except self	6260
76	Rotate String LeetCode Solution	6243
77	String to Integer (atoi) LeetCode Solution	6157
78	Find the Difference Leetcode Solution	6151
79	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	6104
80	Largest Number Leetcode Solution	6037
81	Candy LeetCode Solution	5982
82	Majority Element Leetcode Solution	5976
83	Happy Number Leetcode Solution	5943
84	Set Matrix Zeroes	5885
85	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	5862
86	Balanced Binary Tree Leetcode Solution	5848
87	Find Common Characters Leetcode Solution	5846
88	Is Subsequence Leetcode Solution	5789
89	Summary Ranges Leetcode Solution	5770
90	Smallest window in a string containing all characters of another string	5721
91	Arranging Coins Leetcode Solution	5692
92	Find the Town Judge Leetcode Solution	5690
93	Word Pattern LeetCode Solution	5654
94	Unique Paths Leetcode Solution	5635
95	Subset Leetcode	5612
96	Rearrange Positive and Negative Numbers Alternatively in Array	5581
97	Sort Colors LeetCode Solution	5561
98	String Compression LeetCode Solution	5484
99	Sort Characters By Frequency LeetCode Solution	5484
100	Binary Search LeetCode Solution	5469
101	Asteroid Collision LeetCode Solution	5427
102	Repeated Substring Pattern LeetCode Solution	5417
103	Find the Winner of the Circular Game LeetCode Solution	5398
104	Find the Duplicate Number LeetCode Solution	5386
105	Best Time to Buy and Sell Stock LeetCode Solution	5382
106	Linked List Cycle II LeetCode Solution	5338
107	Reverse Integer Leetcode Solution	5333
108	Sort Array By Parity LeetCode Solution	5333
109	Valid Palindrome II Leetcode Solution	5297
110	Best Time to Buy and Sell Stock II Leetcode Solution	5263
111	Sum of minimum and maximum elements of all subarrays of size k	5263
112	Product of Array Except Self LeetCode Solution	5233
113	A Product Array Puzzle	5233
114	Rabin Karp Algorithm	5223
115	Zigzag Conversion LeetCode Solution	5217
116	Divide Two Integers Leetcode Solution	5175
117	Expression Evaluation	5163
118	Bus Routes Leetcode Solution	5154
119	Group Anagrams LeetCode Solution	5108
120	Employee Free Time LeetCode Solution	5100
121	Merge Two Sorted Lists Leetcode Solutions	5094
122	First element occurring k times in an array	5039
123	Pascal Triangle Leetcode	5019
124	Minimum Cost For Tickets Leetcode Solution	4983
125	Matrix Chain Multiplication using Dynamic Programming	4970
126	Build Array From Permutation Leetcode Solution	4958
127	Postfix to Infix Conversion	4953
128	Page Replacement Algorithms in Operating Systems	4938
129	Length of Last Word Leetcode Solution	4925
130	Kth largest element in an Array Leetcode Solutions	4918
131	Number of Provinces Leetcode Solution	4891
132	Minimum Steps to reach target by a Knight	4889
133	Increasing Triplet Subsequence LeetCode Solution	4884
134	Optimal Account Balancing LeetCode Solution	4851
135	H-Index Leetcode Solution	4833
136	Implementation of Deque using Doubly Linked List	4826
137	Assign Cookies Leetcode Solution	4823
138	Decode String Leetcode Solution	4801
139	Fibonacci Number LeetCode Solution	4799
140	Defanging an IP Address Leetcode Solution	4771
141	Robot Room Cleaner Leetcode Solution	4720
142	First Unique Character in a String LeetCode Solution	4710
143	Generate Parentheses Leetcode Solution	4705
144	Convert array into Zig-Zag fashion	4686
145	Remove Duplicates from Sorted Array II Leetcode Solution	4674
146	Subarray with Given Sum	4613
147	Find Smallest Missing Number in a Sorted Array	4606
148	Swap Nodes in Pairs Leetcode Solutions	4584
149	Island Perimeter Leetcode Solution	4567
150	Check if the Elements of an Array are Consecutive	4562
151	Subarray Product Less Than K LeetCode Solution	4561
152	Pascal’s Triangle II Leetcode Solution	4560
153	Bellman Ford Algorithm	4540
154	Length of the largest subarray with contiguous elements	4537
155	Guess Number Higher or Lower LeetCode Solution	4529
156	K-th Smallest Element in a Sorted Matrix	4527
157	Prefix to Infix Conversion	4522
158	Add Two Numbers II Leetcode Solution	4483
159	Coin Change 2 Leetcode Solution	4476
160	Find the Missing Number	4476
161	Last Stone Weight	4472
162	Find First and Last Position of Element in Sorted Array Leetcode Solution	4460
163	KMP Algorithm	4458
164	Reverse Words in a String III LeetCode Solution	4456
165	Max Consecutive Ones Leetcode Solution	4435
166	Lemonade Change Leetcode Solution	4428
167	Form Minimum Number from Given Sequence of D’s and I’s	4423
168	Majority Element II Leetcode Solution	4389
169	OSI Model	4384
170	Design Parking System Leetcode Solution	4380
171	Capacity To Ship Packages Within D Days Leetcode Solution	4376
172	Combinations Leetcode Solution	4345
173	First negative integer in every window of size k	4344
174	Find Pair with Given Difference	4344
175	Backspace String Compare	4322
176	Remove Linked List Elements Leetcode Solution	4319
177	String Compression	4319
178	Palindrome Linked List Leetcode Solution	4295
179	Trapping Rain Water Leetcode Solution	4291
180	Find All Duplicates in an Array LeetCode Solution	4291
181	Iterative Implementation of Quick Sort	4287
182	Delete middle element of a stack	4270
183	Remove Duplicates from Sorted List II LeetCode Solution	4258
184	Repeated Substring Pattern	4229
185	Break a Palindrome LeetCode Solution	4200
186	Word Ladder LeetCode Solution	4198
187	Same Tree LeetCode Solution	4187
188	Remove All Occurrences of a Substring LeetCode Solution	4171
189	Monotonic Array LeetCode Solution	4160
190	Subarray Sum Equals K LeetCode Solution	4148
191	Slowest Key Leetcode Solution	4148
192	Merge Sorted Array LeetCode Solution	4107
193	Continuous Subarray Sum LeetCode Solution	4089
194	Merge k Sorted Lists Leetcode Solution	4087
195	01 Matrix LeetCode Solution	4087
196	Make The String Great Leetcode Solution	4077
197	Find the Row with Maximum Number of 1’s	4059
198	Convert a Number to Hexadecimal Leetcode Solution	4029
199	Leetcode Permutations	4018
200	Second Most Repeated Word in a Sequence	4014
201	Find Peak Element LeetCode Solution	4006
202	Number of Dice Rolls With Target Sum LeetCode Solution	4006
203	The K Weakest Rows in a Matrix Leetcode Solution	3998
204	Rearrange given Array in Maximum Minimum Form	3990
205	Time Based Key-Value Store LeetCode Solution	3987
206	Find N Unique Integers Sum up to Zero Leetcode Solution	3978
207	Moving Average from Data Stream Leetcode Solution	3976
208	Valid Perfect Square Leetcode Solution	3971
209	Kth Largest Element in a Stream Leetcode Solution	3965
210	Insert Delete GetRandom O(1) Leetcode Solution	3956
211	Single Element in a Sorted Array LeetCode Solution	3954
212	Delete Node in a Linked List Leetcode Solution	3954
213	Printing brackets in Matrix Chain Multiplication Problem	3948
214	Target Sum	3947
215	Combination Sum	3943
216	Rotate List Leetcode Solution	3937
217	Subarray Sum Equals k	3899
218	Generate all Binary Strings Without Consecutive 1’s	3893
219	Check If Two String Arrays are Equivalent Leetcode Solution	3892
220	Find the Duplicate Element	3891
221	Max Area of Island	3887
222	Top K Frequent Elements LeetCode Solution	3884
223	Longest Common Subsequence LeetCode Solution	3871
224	Palindrome Number	3864
225	Maximum Product of Three Numbers LeetCode Solution	3860
226	Reverse Only Letters LeetCode Solution	3846
227	Cuckoo sequence program	3843
228	Prefix to Postfix Conversion	3828
229	LRU Cache LeetCode Solution	3809
230	Minimum Knight Moves LeetCode Solution	3807
231	Relative Sort Array Leetcode Solution	3801
232	Relative Ranks Leetcode Solution	3795
233	Find Leaders in an Array	3793
234	Find Triplet in Array With a Given Sum	3789
235	Flipping an Image LeetCode Solution	3779
236	Number of Steps to Reduce a Number to Zero Leetcode Solution	3778
237	Scramble String	3764
238	Count Good Nodes in Binary Tree Leetcode Solution	3760
239	Maximum Population Year LeetCode Solution	3738
240	Letter Combinations of a Phone Number	3736
241	Permutation in String Leetcode Solution	3731
242	Smallest Positive Number Missing in an Unsorted Array	3731
243	Unique Paths II Leetcode Solution	3715
244	The kth Factor of n Leetcode Solution	3699
245	Check If N and Its Double Exist Leetcode Solution	3695
246	Stock Buy Sell to Maximize Profit	3673
247	Minimum swaps required to bring all elements less than or equal to k together	3656
248	To Lower Case Leetcode Solution	3652
249	Maximum Subarray Sum using Divide and Conquer	3652
250	Remove Minimum Characters so that Two Strings Become Anagrams	3651
251	Top K Frequent Elements	3649
252	N-Queens LeetCode Solution	3648
253	Minimum Operations to convert X to Y	3646
254	Given two unsorted arrays find all pairs whose sum is x	3642
255	Arithmetic Expression Evaluation	3641
256	Search Suggestions System LeetCode Solution	3624
257	Set Matrix Zeroes Leetcode Solution	3624
258	Sum of Subarray Ranges Leetcode Solution	3588
259	Student Attendance Record I Leetcode Solution	3583
260	Min Cost Climbing Stairs LeetCode Solution	3576
261	Find the Number Occurring Odd Number of Times in an Array	3544
262	Maximize Distance to Closest Person LeetCode Solution	3540
263	Top K Frequent Words LeetCode Solution	3540
264	Remove Duplicates from Sorted List LeetCode Solution	3537
265	License Key Formatting Leetcode Solution	3536
266	Maximum Sum Increasing Subsequence	3511
267	Reformat Date LeetCode Solution	3495
268	Stone Game LeetCode	3466
269	Next Permutation	3456
270	Construct Binary Tree from Given Inorder and Preorder Traversals	3444
271	Find if Path Exists in Graph Leetcode Solution	3434
272	Most Frequent Element in an Array	3427
273	Arrange given Numbers to Form the Biggest Number II	3421
274	Prim’s Algorithm	3417
275	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	3397
276	Reverse individual words	3396
277	Min Stack	3390
278	Minimum Characters to be Added at Front to Make String Palindrome	3390
279	Minimum Path Sum Leetcode Solution	3387
280	Find any one of the multiple repeating elements in read only array	3380
281	Container With Most Water LeetCode Solution	3379
282	Implement a stack using single queue	3379
283	Design A Leaderboard Leetcode Solution	3377
284	Diagonal Traverse LeetCode Solution	3377
285	Sort Elements by Frequency of Occurrences	3371
286	Count of index pairs with equal elements in an array	3368
287	Reverse words in a string	3364
288	Intersection of Two Arrays	3357
289	BFS for Disconnected Graph	3350
290	Evaluate Division	3346
291	Spiral Matrix II Leetcode Solution	3326
292	Maximum Depth of Binary Tree Leetcode Solution	3313
293	Find Words That Can Be Formed by Characters Leetcode Solution	3305
294	Diagonal Traversal LeetCode Solution	3300
295	Special Array With X Elements Greater Than or Equal X Leetcode Solution	3297
296	Count Number of Occurrences in a Sorted Array	3293
297	Invalid Transactions LeetCode Solution	3284
298	Minimum number of Merge Operations to make an Array Palindrome	3276
299	Length of Longest valid Substring	3269
300	Find The Duplicate Number	3265
301	Reveal Cards In Increasing Order Leetcode Solution	3253
302	Best Time to Buy and Sell Stock III Leetcode Solution	3251
303	Contains Duplicate LeetCode Solution	3245
304	Longest Common Subsequence	3243
305	House Robber	3243
306	Least Number of Unique Integers after K Removals Leetcode Solution	3231
307	Symmetric Tree Leetcode Solution	3214
308	Remove Nth Node From End of List Leetcode Solution	3206
309	Last Stone Weight II LeetCode Solution	3196
310	Maximum Size Subarray Sum Equals k Leetcode Solution	3194
311	Single Number	3187
312	Brightest Position on Street LeetCode Solution	3185
313	Robot Bounded In Circle LeetCode Solution	3178
314	Special Positions in a Binary Matrix Leetcode Solution	3174
315	Find Leaves of Binary Tree LeetCode Solution	3162
316	Partition Labels LeetCode Solution	3152
317	Sudoku Solver	3152
318	Binary Tree Zigzag Level Order Traversal LeetCode Solution	3143
319	Construct BST from its given Level Order Traversal	3141
320	N-th Tribonacci Number Leetcode Solution	3136
321	The Celebrity Problem	3132
322	Alien Dictionary LeetCode Solution	3129
323	Shortest Word Distance Leetcode Solution	3127
324	Find the Closest Palindrome number	3124
325	Binary Tree Inorder Traversal LeetCode Solution	3121
326	Lowest Common Ancestor of a Binary Tree Leetcode Solution	3112
327	Range Sum Query 2D – Immutable Leetcode Solution	3104
328	Reverse Bits	3098
329	Invert Binary Tree LeetCode Solution	3096
330	Next Greater Element III LeetCode Solution	3094
331	One Edit Distance LeetCode Solution	3089
332	Check whether Strings are K Distance Apart or Not	3081
333	Mobile Numeric Keypad Problem	3072
334	Count of Triplets With Sum Less than Given Value	3065
335	Find Duplicates in an Array in Most Efficient Way	3063
336	Round Robin Scheduling	3047
337	Jump Game	3046
338	Pair of Positive Negative Values in an Array	3038
339	Next Permutation LeetCode Solution	3030
340	Remove All Ones With Row and Column Flips Leetcode Solution	3012
341	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	3008
342	Regular Expression Matching Regular Expression Matching LeetCode Solution	3005
343	Clone Graph LeetCode Solution	3003
344	Find Winner on a Tic Tac Toe Game Leetcode Solution	3000
345	Sort Array By Parity II Leetcode Solution	3000
346	Minimum operation to make all elements equal in array	3000
347	Remove Invalid Parentheses Leetcode Solution	2995
348	Largest Rectangle in Histogram LeetCode Solution	2994
349	Painting Fence Algorithm	2986
350	Merge Two Sorted Linked Lists	2978
351	Partition Array Into Three Parts With Equal Sum Leetcode Solution	2972
352	Find the First and Second Smallest Elements	2957
353	Minimum Time Visiting All Points Leetcode Solution	2956
354	Find Top K (or Most Frequent) Numbers in a Stream	2941
355	Combination Sum IV LeetCode Solution	2935
356	Minimum Moves to Equal Array Elements Leetcode Solution	2933
357	Maximal Square	2933
358	Rank Transform of an Array Leetcode Solution	2929
359	Tug of War	2927
360	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	2926
361	Check if a given array contains duplicate elements within k distance from each other	2918
362	Find the subarray with least average	2918
363	Sort a stack using a temporary stack	2916
364	Longest subarray not having more than K distinct elements	2910
365	Find minimum difference between any two elements	2908
366	Reverse Nodes in k-Group LeetCode Solution	2904
367	Longest subsequence such that difference between adjacents is one	2900
368	Number of Smaller Elements on Right Side	2898
369	String Matching in an Array Leetcode Solution	2896
370	K Empty Slots LeetCode	2890
371	Range Sum of BST LeetCode Solution	2887
372	Unique Paths	2886
373	LRU Cache Implementation	2886
374	Maximum Circular Subarray Sum	2884
375	Minimum Depth of Binary Tree Leetcode Solution	2882
376	Maximum Number of Occurrences of a Substring Leetcode Solution	2877
377	Bitwise AND of Numbers Range LeetCode Solution	2877
378	Find the Smallest Divisor given a Threshold Leetcode Solution	2870
379	Path With Maximum Minimum Value LeetCode Solution	2869
380	Longest Palindrome can be Formed by Removing or Rearranging Characters	2867
381	Paint House LeetCode Solution	2865
382	Longest Common Prefix using Trie	2865
383	Design Browser History LeetCode Solution	2862
384	Minimum Cost to Hire K Workers	2862
385	LRU Cache Leetcode Solution	2856
386	Sliding Window Technique	2856
387	Missing Element in Sorted Array LeetCode Solution	2852
388	Find Maximum Level sum in Binary Tree	2849
389	Integer Break LeetCode Solution	2848
390	Ugly Number II LeetCode Solution	2847
391	Smallest Subarray with k Distinct Numbers	2847
392	Dijkstra Algorithm	2847
393	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	2846
394	Minimize Maximum Pair Sum in Array LeetCode Solution	2839
395	First Circular Tour to Visit all the Petrol Bunks	2837
396	Insert Interval Leetcode Solution	2836
397	Common elements in all rows of a given matrix	2833
398	Permutation Sequence LeetCode Solution	2829
399	Non-decreasing Array LeetCode Solution	2829
400	Hamming Distance Leetcode Solution	2829
401	Graph Valid Tree LeetCode Solution	2826
402	Split Linked List in Parts Leetcode Solution	2823
403	Find the Peak Element from an Array	2823
404	Number of Islands II LeetCode Solution	2818
405	Consecutive Characters LeetCode Solution	2809
406	Given an Array of Pairs Find all Symmetric Pairs in it	2801
407	Queries for counts of array elements with values in given range	2793
408	Minimum Time to Collect All Apples in a Tree LeetCode Solution	2791
409	Transpose Graph	2785
410	K Closest Points to Origin Leetcode Solution	2783
411	Unique Paths III LeetCode Solution	2777
412	Invert Binary Tree LeetCode Solution	2769
413	Number of Closed Islands Leetcode Solution	2769
414	Max stack	2766
415	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	2765
416	Find duplicates in a given array when elements are not limited to a range	2765
417	Priority Queue using doubly linked list	2765
418	Minesweeper LeetCode Solution	2756
419	Stone Game II Leetcode	2744
420	Implementation of Deque using circular array	2740
421	Move All the Zeros to the End of the Given Array	2737
422	Sort elements by frequency	2731
423	Decompress Run-Length Encoded List Leetcode Solution	2725
424	Maximum Consecutive Numbers Present in an Array	2721
425	Design a stack that supports getMin() in O(1) time and O(1) extra space	2717
426	Replace Elements with Greatest Element on Right Side Leetcode Solution	2710
427	Is Graph Bipartite? LeetCode Solution	2709
428	Odd Even Linked List Leetcode Solution	2708
429	Convert Sorted Array to Binary Search Tree LeetCode Solutions	2708
430	Word Search	2707
431	Nth Catalan Number	2702
432	Top View of Binary Tree	2700
433	Stack Permutations (Check if an array is stack permutation of other)	2697
434	Expression Contains Redundant Bracket or Not	2697
435	Binary Tree Maximum Path Sum LeetCode Solution	2693
436	Restore IP Addresses Leetcode Solution	2691
437	Snakes and Ladders LeetCode Solution	2687
438	Sorting array using Stacks	2683
439	Longest Common Prefix using Sorting	2682
440	Partition List Leetcode Solution	2678
441	Can Make Arithmetic Progression From Sequence Leetcode Solution	2676
442	Integer to English words	2666
443	Kth Smallest Element in a BST Leetcode Solution	2665
444	Gold Mine Problem	2665
445	Toeplitz Matrix	2665
446	Path Sum II LeetCode Solution	2664
447	Priority Queue in C++	2664
448	Reverse a linked list	2662
449	Rearrange array such that even positioned are greater than odd	2657
450	Validate Stack Sequences LeetCode Solution	2653
451	Maximum Subarray	2652
452	Count Submatrices With All Ones LeetCode Solution	2647
453	Recursion	2645
454	Flood Fill LeetCode	2640
455	Vertical Order Traversal of Binary Tree LeetCode Solution	2636
456	Multiplication of Two Matrices	2634
457	Kth Non-repeating Character	2629
458	Find a Peak Element II LeetCode Solution	2628
459	Number of Days Between Two Dates LeetCode Solution	2627
460	Palindrome Substring Queries	2624
461	Minimum Absolute Difference in BST Leetcode Solution	2623
462	Sequences of given length where every element is more than or equal to twice of previous	2619
463	Number Complement Leetcode Solution	2611
464	How to Implement Stack Using Priority Queue or Heap?	2608
465	Find a Fixed Point in a Given Array	2608
466	Cells with Odd Values in a Matrix LeetCode Solution	2603
467	Longest Increasing Path in a Matrix LeetCode Solution	2601
468	Search a 2D Matrix II Leetcode Solution	2596
469	Queries for GCD of all numbers of an array except elements in a given range	2590
470	Find All Possible Recipes from Given Supplies LeetCode Solution	2587
471	Minimum Path Sum	2581
472	Reorder Data in Log Files LeetCode Solution	2580
473	Longest Substring with At Most K Distinct Characters LeetCode Solution	2576
474	Distance of nearest cell having 1 in a binary matrix	2576
475	Majority Element	2572
476	Shortest Completing Word Leetcode Solution	2571
477	Search in a Binary Search Tree Leetcode Solution	2569
478	Convert Sorted Array to Binary Search Tree Leetcode Solution	2569
479	Intersection of Two Linked Lists LeetCode Solution	2563
480	Detect a loop in the Linked List	2562
481	Kruskal Algorithm	2561
482	Trapping Rain Water LeetCode Solution	2548
483	Best Time to Buy and Sell Stock	2544
484	Scramble String LeetCode Solution	2543
485	Find Pythagorean Triplets from Array	2543
486	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	2542
487	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	2541
488	High Five LeetCode Solution	2539
489	Shortest Palindrome	2537
490	Insert into a Binary Search Tree Leetcode Solution	2533
491	Largest rectangular sub-matrix whose sum is 0	2531
492	Find Median from Data Stream LeetCode Solution	2527
493	Merge Two Binary Trees LeetCode Solution	2527
494	Tiling Problem	2526
495	Design Hit Counter LeetCode Solution	2523
496	The Stock Span Problem	2519
497	Generate all Binary Strings from Given Pattern	2517
498	Balanced Expression with Replacement	2514
499	Insert Node in the Sorted Linked List	2513
500	4Sum	2512
501	Implement Trie (Prefix Tree) Leetcode Solution	2507
502	Check If Array Pairs Are Divisible by k LeetCode Solution	2503
503	Postfix to Prefix Conversion	2503
504	Divide Chocolate LeetCode Solution	2501
505	Find Minimum in Rotated Sorted Array II LeetCode Solution	2496
506	Custom Sort String Leetcode Solution	2496
507	Longest Common Prefix using Divide and Conquer	2491
508	Race Car LeetCode Solution	2490
509	Guess Number Higher or Lower II	2489
510	Find the Minimum Element in a Sorted and Rotated Array	2488
511	Camelcase Matching Leetcode Solution	2482
512	Pancake Sorting Problem	2482
513	Check if Two given Strings are Isomorphic to each other	2481
514	The Maze III LeetCode Solution	2479
515	Evaluate Reverse Polish Notation LeetCode Solution	2473
516	Largest Subarray with Equal Number of 0’s and 1’s	2473
517	Kth ancestor of a node in binary tree	2471
518	Spiral Matrix III LeetCode Solution	2470
519	Letter Case Permutation	2467
520	Count subarrays having total distinct elements same as original array	2466
521	Print all Palindromic Partitions of a String	2466
522	Substring with Concatenation of All Words Leetcode Solution	2460
523	Check if Array Contains Contiguous Integers With Duplicates Allowed	2457
524	Interval Tree	2456
525	Palindrome Permutation LeetCode Solution	2451
526	Sort Colors	2441
527	Sliding Window Maximum LeetCode Solution	2439
528	Sieve of Eratosthenes	2437
529	Sliding Window Median Leetcode Solution	2435
530	LCS (Longest Common Subsequence) of three strings	2435
531	Count Possible Triangles	2434
532	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	2433
533	Convert BST to Min Heap	2431
534	Analyze User Website Visit Pattern LeetCode Solution	2430
535	Merge Overlapping Intervals	2427
536	Find the first Repeating Number in a Given Array	2424
537	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	2418
538	Maximum Sum of Non Consecutive Elements	2406
539	Sort an array according to the order defined by another array	2402
540	Minimum Bracket Reversals	2401
541	Fibonacci numbers	2401
542	Find a Sorted Subsequence of size 3	2400
543	How to Create Mergable Stack?	2398
544	Edit Distance LeetCode Solution	2390
545	Maximum Length of Chain Pairs	2388
546	Decode String	2386
547	Coin Change Problem	2386
548	3 Sum	2384
549	Minimum Jumps to Reach Home LeetCode Solution	2383
550	Jump Game IV LeetCode Solution	2381
551	Longest Repeated Subsequence	2380
552	Iterative Method to find Height of Binary Tree	2380
553	Maximum Number of Ways to Partition an Array LeetCode Solution	2367
554	Implement Two Stacks in an Array	2367
555	Group Anagrams	2365
556	Minimum Height Trees	2365
557	Perfect Squares LeetCode Solution	2363
558	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	2357
559	Maximum Element in an Array which is Increasing and then Decreasing	2356
560	N queen problem	2349
561	Longest Substring with At Least K Repeating Characters LeetCode Solution	2348
562	Path Crossing Leetcode Solution	2348
563	Number of Distinct Islands Leetcode Solution	2347
564	Find the Lost Element From a Duplicated Array	2347
565	Shifting Letters LeetCode Solution	2346
566	Different Ways to Add Parentheses Leetcode Solution	2341
567	Find maximum length Snake sequence	2341
568	Recover Binary Search Tree Leetcode Solution	2338
569	Build an Array With Stack Operations Leetcode Solution	2326
570	K-th Distinct Element in an Array	2326
571	Decode Ways	2325
572	Fibonacci Number LeetCode Solution	2317
573	Rectangle Overlap LeetCode Solution	2314
574	Subarrays with K Different Integers Leetcode Solution	2311
575	Champagne Tower LeetCode Solution	2311
576	Sorted Linked List to Balanced BST	2308
577	Nearest Exit from Entrance in Maze LeetCode Solution	2307
578	Subset sum problem	2300
579	Contains Duplicate	2296
580	Most Stones Removed with Same Row or Column LeetCode Solution	2295
581	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	2293
582	Find if an Expression has Duplicate Parenthesis or Not	2290
583	Count items common to both the lists but with different prices	2287
584	Find the two Numbers with Odd Occurrences in an Unsorted Array	2281
585	Find Largest Value in Each Tree Row LeetCode Solution	2277
586	First missing positive	2273
587	Possible Bipartition LeetCode Solution	2271
588	Monotonic Array Leetcode Solution	2270
589	Palindrome Partitioning Leetcode Solution	2269
590	Queue based approach for first non-repeating character in a stream	2267
591	Valid Boomerang Leetcode Solution	2266
592	Sort a stack using recursion	2264
593	Design a Stack With Increment Operation Leetcode Solution	2262
594	Number of Equivalent Domino Pairs Leetcode Solution	2255
595	Sliding Window Maximum	2254
596	Minimum Height Trees LeetCode Solution	2253
597	Palindrome Permutations of a String	2250
598	Contiguous Array LeetCode Solution	2244
599	Sort a String According to Another String	2237
600	Palindromic Substrings Leetcode Solution	2232
601	Find the Town Judge LeetCode Solution	2230
602	Merge Overlapping Intervals II	2224
603	Detect Capital Leetcode Solution	2222
604	Reorder an Array According to the Given Indexes	2222
605	Maximum Frequency Stack Leetcode Solution	2221
606	Rearrange Spaces Between Words Leetcode Solution	2220
607	Merge Two Balanced Binary Search Trees	2218
608	Distance Between Bus Stops Leetcode Solution	2212
609	Word Break	2212
610	Best Meeting Point LeetCode Solution	2211
611	Number of palindromic paths in a matrix	2193
612	Morris Traversal	2191
613	Maximum sum rectangle in a 2D matrix	2191
614	Swapping Nodes in a Linked List Leetcode Solution	2188
615	Valid Parentheses Leetcode Solution	2185
616	Perform String Shifts Leetcode	2183
617	Find the Subarray of given length with Least Average	2183
618	Caesar Cipher	2168
619	Maximum Product of Splitted Binary Tree LeetCode Solution	2166
620	Find Median from data Stream	2164
621	Maximum Depth of N-ary Tree Leetcode Solution	2161
622	Check if the given array can represent Level Order Traversal of Binary Search Tree	2161
623	Merge K Sorted Arrays and Print Sorted Output	2161
624	Recover Binary Search Tree	2158
625	All Possible Full Binary Trees LeetCode Solution	2155
626	Maximum Score After Splitting a String Leetcode Solution	2153
627	Construction of Longest Increasing Subsequence (N log N)	2152
628	Maximize Elements Using Another Array	2139
629	A Space Optimized DP solution for 0-1 Knapsack Problem	2139
630	Brick Wall LeetCode Solution	2138
631	Minimum number of jumps to reach end	2137
632	Queue using Stacks	2135
633	Reach a Number LeetCode Solution	2133
634	Smallest Good Base	2133
635	Find First and Last Position of Element in Sorted Array LeetCode Solution	2131
636	Pair with given product	2129
637	Palindrome Permutation	2124
638	Mean of Array After Removing Some Elements Leetcode Solution	2123
639	Find the First Circular Tour that visits all the Petrol Pumps	2123
640	Binary Tree zigzag level order Traversal	2123
641	Word Pattern	2122
642	Implement strStr() LeetCode Solution	2116
643	Maximum Number of Chocolates to be Distributed Equally Among k Students	2112
644	My Calendar I LeetCode Solution	2108
645	Valid Sudoku	2107
646	Split Array Into Consecutive Subsequences	2097
647	Check if a Linked list of Strings form a Palindrome	2097
648	How to Efficiently Implement k Stacks in a Single Array?	2079
649	Find all pairs (a, b) in an array such that a % b = k	2075
650	Binary Tree Right Side View LeetCode Solution	2074
651	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	2074
652	Populating Next Right Pointers in Each Node Leetcode Solution	2073
653	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	2072
654	Convert Sorted List to Binary Search Tree	2072
655	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	2067
656	Count pair with Given Sum	2063
657	Minimum Sum Path in a Triangle	2061
658	Check if String Follows Order of Characters by a Pattern or not	2060
659	Add two numbers	2055
660	Web Crawler LeetCode Solution	2053
661	Remove brackets from an algebraic string containing + and – operators	2048
662	Huffman Coding	2048
663	Largest Sum Contiguous Subarray	2042
664	Minimum Swaps to Group All 1’s Together Leetcode Solution	2041
665	Design Skiplist LeetCode Solution	2041
666	Concatenation of Array LeetCode Solution	2031
667	Find whether a subarray is in form of a mountain or not	2031
668	Best Time to Buy and Sell Stock IV LeetCode Solution	2030
669	Count ways to reach the nth stair using step 1, 2 or 3	2026
670	Print all subarrays with 0 sum	2025
671	Segregate 0s and 1s in an Array	2024
672	Print Fibonacci sequence using 2 variables	2023
673	Count Sub Islands LeetCode Solution	2021
674	Arithmetic Slices II – Subsequence LeetCode Solution	2021
675	Length of Longest Fibonacci Subsequence	2019
676	Minimum time required to rot all oranges	2016
677	Populating Next Right Pointers in Each Node	2006
678	Partition to K Equal Sum Subsets Leetcode Solution	2004
679	Longest Subarray Having Count of 1s One More than Count of 0s	2004
680	Find Maximum of Minimum for Every Window Size in a Given Array	2003
681	Sort 0s 1s and 2s in an Array	1999
682	Elements Appear more than N/K times in Array	1997
683	Construct BST from given Preorder Traversal	1993
684	Level order Traversal in Spiral Form	1993
685	Find four elements that sum to a given value (Hashmap)	1989
686	Isomorphic Strings LeetCode Solution	1988
687	Range Sum Query 2D – Immutable LeetCode Solution	1988
688	All Unique Triplets that Sum up to a Given Value	1988
689	Finding K closest element	1982
690	Swap Kth Node from beginning with Kth Node from End	1981
691	Partition Problem	1974
692	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	1971
693	Count Distinct Elements in Every Window of Size K	1971
694	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	1963
695	Validate Binary Search Tree	1956
696	Find all triplets with zero sum	1955
697	Heap Sort	1955
698	Remove Palindromic Subsequences Leetcode Solution	1953
699	Maximize Sum of Array after K Negations Leetcode Solution	1946
700	Check for Balanced Parentheses in an Expression	1945
701	Bubble sort using two Stacks	1943
702	Counting Bits	1940
703	Difference Array \| Range update query in O(1)	1935
704	Nested List Weight Sum II LeetCode Solution	1930
705	Find All Pairs With a Given Difference	1929
706	Find Duplicate Subtrees	1921
707	Count Minimum Steps to Get the given Array	1909
708	Contiguous Array Leetcode	1903
709	Rearrange an Array Such that arr[i] is equal to i	1901
710	MiniMax Algorithm	1899
711	Binary Tree to Binary Search Tree Conversion	1898
712	String comparison containing wildcards	1898
713	Linked List Cycle	1896
714	Maximum Distance in Array	1888
715	Maximum Product Subarray II	1888
716	Reorder Array Using Given Indexes	1884
717	Merge K Sorted Linked Lists	1882
718	Sum Root to Leaf Numbers LeetCode Solution	1880
719	Parallel Courses II LeetCode Solution	1880
720	Root to Leaf path with target sum Leetcode Solutions	1877
721	Reverse Nodes in K-Group	1874
722	Increasing Subsequence of Length three with Maximum Product	1871
723	Check if Two Expressions With Brackets are Same	1869
724	Maximum difference between two elements such as larger element comes after smaller	1867
725	Happy Number	1865
726	Longest Increasing Subsequence	1861
727	Merge Two Sorted Lists Leetcode	1860
728	Inorder Successor of a node in Binary Tree	1858
729	Check if any two intervals overlap among a given set of intervals	1858
730	Symmetric Tree	1857
731	Container with Most Water	1854
732	Alien Dictionary	1853
733	Minimum Distance Between BST Nodes Leetcode Solution	1851
734	Flatten 2D Vector LeetCode Solution	1848
735	An Interesting Method to generate Binary Numbers from 1 to n	1840
736	Longest Common Prefix Using Binary Search II	1840
737	K maximum sums of overlapping contiguous sub-arrays	1839
738	Rotate Array	1837
739	Union and Intersection of two Linked Lists	1833
740	Queue Reconstruction by Height	1831
741	Iterative Depth First Traversal of Graph	1827
742	Score of Parenthesis LeetCode Solution	1826
743	Minimum Swaps to Make Strings Equal Leetcode Solution	1821
744	Delete Nth node from the end of the given linked list	1821
745	Count Good Nodes in Binary Tree LeetCode Solution	1820
746	Find pairs with given sum such that elements of pair are in different rows	1819
747	Minimum Cost to Move Chips to The Same Position LeetCode Solution	1818
748	Queries on Probability of Even or Odd Number in given Ranges	1812
749	Kill Process LeetCode Solution	1807
750	Find the first repeating element in an array of integers	1807
751	Smallest Range II Leetcode Solution	1803
752	Climbing stairs	1803
753	Delete Nodes and Return Forest Leetcode Solution	1800
754	Longest Common Prefix Word by Word Matching	1798
755	Find subarray with given sum (Handles Negative Numbers)	1796
756	Substring With Concatenation Of All Words	1796
757	Print a Binary Tree in Vertical Order	1795
758	Breadth First Search (BFS) for a Graph	1794
759	Merging Intervals	1781
760	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	1779
761	Check if a queue can be sorted into another queue using a stack	1774
762	New 21 Game	1773
763	Remove duplicates from sorted array	1770
764	Peak Index in a Mountain Array LeetCode Solution	1766
765	Iterative Preorder Traversal	1765
766	Valid Parenthesis String	1764
767	Maximum size subarray sum equals k	1752
768	Minimum Size Subarray Sum	1751
769	Range LCM Queries	1743
770	Find K Closest Elements LeetCode Solution	1742
771	Sorting a K Sorted Array	1739
772	Sort Array by Increasing Frequency Leetcode Solution	1738
773	Find the Difference Leetcode Solution	1736
774	Find Maximum Sum Possible Equal Sum of Three Stacks	1733
775	Verify Preorder Serialization of a Binary Tree	1731
776	Friends Of Appropriate Ages LeetCode Solution	1730
777	Matrix Chain Multiplication	1730
778	Construct Binary Tree from given Parent Array representation	1729
779	Vertical sum in a given binary tree	1727
780	Count pairs from two linked lists whose sum is equal to a given value	1722
781	Find Sum of all unique sub-array sum for a given array	1719
782	Find K Length Subarray of Maximum Average	1716
783	Check if a given array can represent Preorder Traversal of Binary Search Tree	1712
784	Minimum Number of Arrows to Burst Balloons LeetCode Solution	1710
785	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	1709
786	Reservoir Sampling	1704
787	Defanging an IP Address LeetCode Solution	1702
788	Find Three Element From Different Three Arrays Such That a + b + c = sum	1699
789	Minimum Remove to Make Valid Parentheses LeetCode Solution	1698
790	Maximum Product Subarray	1698
791	Valid Anagrams	1697
792	Remove Duplicates from Sorted List II	1697
793	Non-overlapping sum of two sets	1696
794	Sum of f(a[i], a[j]) over all pairs in an array of n integers	1695
795	Flatten Binary Tree to Linked List LeetCode Solution	1688
796	The Painter’s Partition Problem	1684
797	Boolean Parenthesization Problem	1683
798	Given a binary tree, how do you remove all the half nodes?	1682
799	Print All Distinct Elements of a Given Integer Array	1679
800	Employee Importance LeetCode Solution	1678
801	Find the largest multiple of 3	1677
802	Number of siblings of a given Node in n-ary Tree	1676
803	Boundary Traversal of binary tree	1674
804	Unique Binary Search Trees	1667
805	Deletion in a Binary Tree	1664
806	Closest Leaf in a Binary Tree LeetCode Solution	1661
807	Partition Equal Subset Sum	1658
808	Print all triplets in sorted array that form AP	1654
809	Median of Two Sorted Arrays	1653
810	Level order traversal using two Queues	1648
811	Products of ranges in an array	1647
812	Infix to Postfix	1647
813	Check Completeness of a Binary Tree LeetCode Solution	1646
814	Count and Say	1645
815	Isomorphic Strings	1645
816	Level of Each node in a Tree from source node	1643
817	Third Maximum Number Leetcode Solution	1641
818	Tree Traversal (Preorder, Inorder & Postorder)	1641
819	Count number of triplets with product equal to given number	1640
820	Find Peak Element	1639
821	Pancake Sorting	1639
822	Largest BST Subtree LeetCode Solution	1636
823	Distinct Subsequences	1634
824	Find Element Using Binary Search in Sorted Array	1634
825	Hamming Distance	1632
826	Bold Words in String LeetCode Solution	1631
827	Maximum subsequence sum such that no three are consecutive	1630
828	Subset Sum Problem in O(sum) space	1627
829	Unique Binary Search Trees LeetCode Solution	1624
830	Find distance between two nodes of a Binary Tree	1618
831	Longest Palindromic Subsequence	1617
832	Largest divisible pairs subset	1616
833	Create Maximum Number	1613
834	Find Nth Node	1611
835	Palindrome Partitioning	1605
836	Super Ugly Number	1604
837	Array Nesting Leetcode Solution	1599
838	Find Common Characters Leetcode Solution	1597
839	Valid Number	1596
840	Largest Submatrix With Rearrangements LeetCode Solution	1594
841	Four Elements that Sum to Given	1591
842	Missing Number	1590
843	Kth Smallest Element in a Sorted Matrix LeetCode Solution	1587
844	BFS vs DFS for Binary Tree	1586
845	Minimum insertions to form a palindrome with permutations allowed	1581
846	Serialize and Deserialize Binary Tree LeetCode Solution	1579
847	Binary array after M range toggle operations	1579
848	Valid Triangle Number LeetCode Solution	1571
849	Maximum number of segments of lengths a, b and c	1571
850	Transform a BST to Greater sum Tree	1569
851	Sort Elements by Frequency II	1568
852	Lowest Common Ancestor	1567
853	Compare Strings by Frequency of the Smallest Character Leetcode Solution	1566
854	Check if two nodes are on the same path in a Tree	1566
855	Shuffle an Array	1566
856	Find Smallest Range Containing Elements from k Lists	1561
857	Newman-Conway Sequence	1561
858	Maximum Population Year LeetCode Solution	1558
859	Number Of Longest Increasing Subsequence	1557
860	Binary Tree Longest Consecutive Sequence LeetCode Solution	1556
861	Next Greater Element in an Array	1554
862	Next Greater Element II LeetCode Solution	1553
863	Sentence Screen Fitting LeetCode Solution	1551
864	Integer to Roman	1547
865	Insert Delete GetRandom	1542
866	Balanced Binary Tree	1542
867	Averages of Levels in Binary Tree	1542
868	Trapping Rain Water II LeetCode Solution	1535
869	Closest Binary Search Tree Value Leetcode Solution	1530
870	Maximum Sum of 3 Non-Overlapping Subarrays	1530
871	Largest subarray with equal number of 0s and 1s	1525
872	Minimum sum of squares of character counts in a given string after removing k characters	1522
873	Valid Triangle Number LeetCode Solution	1521
874	Path Sum	1521
875	Height of a generic tree from parent array	1520
876	Encoded String With Shortest Length LeetCode Solution	1518
877	Merge Two Sorted Arrays	1517
878	Stone Game IV LeetCode Solution	1513
879	Merging Two Sorted Arrays	1512
880	Topological Sorting	1511
881	Stone Game IV LeetCode Solution	1509
882	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	1509
883	Kth Smallest Number in Multiplication Table Leetcode Solution	1507
884	Check if all levels of two Binary Tree are anagrams or not	1507
885	First Bad Version	1501
886	Permutations of a Given String Using STL	1497
887	Arrange given numbers to form the biggest number	1496
888	Lower Case To Upper Case	1496
889	Count Primes in Ranges	1491
890	Red-Black Tree Introduction	1487
891	Range Minimum Query (Square Root Decomposition and Sparse Table)	1486
892	Contiguous Array	1485
893	Find minimum number of merge operations to make an array palindrome	1482
894	Reorganize String	1478
895	Diameter of N-Ary Tree LeetCode Solution	1473
896	Find unique character in a string	1472
897	Iterative Postorder Traversal Using Two Stacks	1471
898	Print Right View of a Binary Tree	1469
899	Friends Pairing Problem	1469
900	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	1468
901	Find Minimum In Rotated Sorted Array	1466
902	Level Order Traversal of Binary Tree	1465
903	Maximum difference between first and last indexes of an element in array	1464
904	Orderly Queue LeetCode Solution	1460
905	Find Largest d in Array such that a + b + c = d	1460
906	Diagonal Traversal of Binary Tree	1454
907	Bottom View of a Binary Tree	1449
908	Minimum Swaps To Make Sequences Increasing LeetCode Solution	1448
909	Reverse a Path in BST using Queue	1445
910	Swap Nodes In Pairs	1445
911	Binary Search Tree Delete Operation	1444
912	Constant time range add operation on an array	1443
913	Longest Bitonic Subsequence	1441
914	Largest Plus Sign Leetcode Solution	1440
915	Valid Perfect Square LeetCode Solution	1439
916	Total Hamming Distance LeetCode Solution	1438
917	Next greater element	1435
918	Koko Eating Bananas LeetCode Solution	1434
919	Serialize and Deserialize Binary Tree	1431
920	Count the Pairs at Same Distance as in English Alphabets	1426
921	Best Meeting Point LeetCode Solution	1417
922	Range Sum Query using Sparse Table	1413
923	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	1412
924	Segment Tree	1408
925	Binary Search Tree Search and Insertion	1406
926	Edit Distance	1405
927	Maximum Product Subarray	1405
928	Valid Tic-Tac-Toe State LeetCode Solution	1399
929	Longest Substring Without Repeating Characters Leetcode Solution	1395
930	Maximum Product Subarray	1395
931	Find the smallest binary digit multiple of given number	1391
932	A program to check if a binary tree is BST or not	1387
933	Advantages of BST over Hash Table	1387
934	Convert BST into a Min-Heap without using array	1377
935	The Number of Weak Characters in the Game LeetCode Solution	1376
936	Group Shifted Strings Leetcode Solution	1371
937	Maximum difference between frequency of two elements such that element having greater frequency is also greater	1370
938	Maximum Sum Increasing Subsequence	1370
939	Shuffle a given Array	1368
940	Design Add and Search Words Data Structure LeetCode Solution	1363
941	K’th Largest element in BST using constant extra space	1362
942	Greatest Sum Divisible by Three LeetCode Solution	1361
943	Longest Increasing Consecutive Subsequence	1358
944	Array Queries for multiply replacements and product	1357
945	Image Overlap LeetCode Solution	1353
946	Priority Queue	1351
947	Write a function to get the intersection point of two Linked Lists	1349
948	Dividing Array into Pairs With Sum Divisible by K	1343
949	Design Underground System Leetcode Solution	1338
950	Collect maximum points in a grid using two traversals	1337
951	Construct Complete Binary Tree from its Linked List Representation	1333
952	Print Next Greater Number of Q queries	1333
953	Print n terms of Newman-Conway Sequence	1332
954	Range Queries for Longest Correct Bracket Subsequence	1332
955	Factorial Trailing Zeroes LeetCode Solution	1326
956	Insert into a Sorted Circular Linked List LeetCode Solution	1320
957	Queries on XOR of greatest odd divisor of the range	1320
958	Check if an Array is Stack Sortable	1320
959	Find the node with minimum value in a Binary Search Tree	1318
960	Swim in Rising Water LeetCode Solution	1315
961	Merge Sort	1315
962	Sorted Array to Balanced BST	1312
963	Lowest Common Ancestor in Binary Search Tree	1312
964	Find postorder traversal of BST from preorder traversal	1309
965	Form Minimum Number From Given Sequence	1309
966	Guess The Word	1307
967	Power of Two	1303
968	Print modified array after multiple array range increment operations	1302
969	Maximum Array from Two given Arrays Keeping Order Same	1297
970	Clone a Binary Tree with Random Pointers	1297
971	Form minimum number from given sequence	1294
972	Excel Sheet Column Number LeetCode Solution	1293
973	K’th Largest Element in BST when modification to BST is not allowed	1293
974	Print all Possible Ways to Break a String in Bracket Form	1289
975	Longest Common Prefix using Character by Character Matching	1288
976	Numbers with prime frequencies greater than or equal to k	1285
977	Queries for Number of Distinct Elements in a Subarray	1280
978	Moving Stones Until Consecutive Leetcode Solution	1276
979	Merge Sorted Array	1275
980	Count and Toggle Queries on a Binary Array	1263
981	K Empty Slots	1263
982	Write Code to Determine if Two Trees are Identical	1259
983	Check for Palindrome after every character replacement Query	1256
984	Decrease Elements To Make Array Zigzag LeetCode Solution	1255
985	Check if each internal node of a BST has exactly one child	1254
986	Search in Sorted Rotated Array	1252
987	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	1246
988	Count even length binary sequences with same sum of first and second half bits	1246
989	Cutting a Rod	1245
990	Find Maximum Depth of Nested Parenthesis in a String	1244
991	Number of elements less than or equal to a given number in a given subarray	1240
992	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1229
993	Number of Orders in the Backlog Leetcode Solution	1227
994	Closest Binary Search Tree Value II LeetCode Solution	1226
995	Find maximum average subarray of k length	1226
996	Check if X can give change to every person in the Queue	1222
997	Binary Search Tree	1222
998	Queries for Decimal Values of Subarrays of a Binary Array	1220
999	Minimum Moves to Equal Array Elements LeetCode Solution	1210
1000	Merge two BSTs with limited extra space	1207
1001	Unique Paths II	1204
1002	Count Pairs Whose Products Exist in Array	1203
1003	Print Ancestors of a Given Binary Tree Node Without Recursion	1200
1004	Kth Smallest Element in a BST	1193
1005	Symmetric Tree LeetCode Solution Leetcode Solution	1188
1006	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	1186
1007	Regular Expression Matching	1184
1008	Maximum weight transformation of a given string	1177
1009	Shortest Unsorted Continuous Subarray LeetCode Solution	1175
1010	Sum of Left Leaves LeetCode Solution	1172
1011	How to print maximum number of A’s using given four keys	1167
1012	Graph Cloning	1163
1013	Random Pick Index LeetCode Solution	1155
1014	Maximum Depth Of Binary Tree	1149
1015	Excel Sheet Column Title LeetCode Solution	1139
1016	Search an Element in Sorted Rotated Array	1132
1017	Palindrome Partitioning	1125
1018	Data Structure Designing	1112
1019	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	1111
1020	Check given array of size n can represent BST of n levels or not	1109
1021	Iterative method to find ancestors of a given binary tree	1105
1022	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	1103
1023	Maximum Binary Tree	1083
1024	Next Greater Element I Leetcode Solution	1075
1025	Binary Tree to Binary Search Tree Conversion using STL set	1053
1026	Find k-th smallest element in BST (Order Statistics in BST)	1050
1027	Find the Town Judge LeetCode Solution	1045
1028	Print Maximum Length Chain of Pairs	1001
1029	Peeking Iterator LeetCode Solution	980
1030	Flatten Binary Tree to Linked List LeetCode Solution	979
1031	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	961