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	27751
2	Maximum occurring character in a string	15843
3	Plus One Leetcode Solution	13857
4	Valid Parentheses LeetCode Solution	13134
5	First Repeating Element	11427
6	3Sum Leetcode Solution	11302
7	Single Number Leetcode Solution	10834
8	Pow(x, n) Leetcode Solution	9506
9	Sqrt(x) Leetcode Solution	8974
10	Merge Sorted Arrays Leetcode Solution	8902
11	Meeting Rooms II LeetCode Solution	8846
12	Contains Duplicate II Leetcode Solution	8614
13	Search Insert Position Leetcode Solution	8098
14	Count Primes Leetcode Solutions	8020
15	Roman to Integer Leetcode Solution	7913
16	Concatenation of Array LeetCode Solution	7800
17	Valid Palindrome Leetcode Solution	7770
18	Reverse Vowels of a String Leetcode Solution	7707
19	Intersection of Two Arrays II Leetcode Solution	7671
20	Palindrome Number LeetCode Solution	7590
21	Find the Maximum Repeating Number in Array	7580
22	Jump Game Leetcode Solution	7167
23	Text Justification LeetCode Solution	7143
24	Kids With the Greatest Number of Candies Leetcode Solution	7066
25	Number of Good Pairs Leetcode Solution	6983
26	Add Binary Leetcode Solution	6949
27	House Robber Leetcode Solution	6930
28	Spiral Matrix LeetCode Solution	6873
29	Number Of 1 bits	6609
30	Find All Numbers Disappeared in an Array Leetcode Solution	6574
31	Longest Palindromic Substring LeetCode Solution	6543
32	Running Sum of 1d Array Leetcode Solution	6480
33	Kth Missing Positive Number Leetcode Solution	6451
34	Shuffle String Leetcode Solution	6415
35	Find Minimum Distance Between Two Numbers in an Array	6285
36	Permutations Leetcode Solution	6273
37	Power of Two Leetcode Solution	6273
38	Next Permutation Leetcode Solution	6214
39	Maximum Profit in Job Scheduling Leetcode Solution	6181
40	Longest Common Prefix Leetcode Solution	6171
41	Jewels and Stones Leetcode Solution	6158
42	Maximum Subarray Leetcode Solution	6133
43	Word Search Leetcode Solution	6030
44	Frog Jump Leetcode Solution	6020
45	Third Maximum Number Leetcode Solution	6008
46	Longest Substring Without Repeating Characters LeetCode Solution	5997
47	Reverse String Without Temporary Variable	5974
48	Number of Islands LeetCode Solution	5893
49	Bulb Switcher LeetCode Solution	5853
50	Daily Temperatures Leetcode Solution	5852
51	Combination Sum Leetcode Solution	5828
52	Move Zeroes LeetCode Solution	5818
53	Next Greater Element I Leetcode Solution	5766
54	Rotate Image LeetCode Solution	5743
55	Min Stack Leetcode Solution	5732
56	Strobogrammatic Number LeetCode Solution	5705
57	3Sum Closest LeetCode Solution	5681
58	Shuffle the Array Leetcode Solution	5628
59	Can Place Flowers LeetCode Solution	5625
60	Subarray and Subsequence	5595
61	Missing Number Leetcode Solution	5566
62	Search in Rotated Sorted Array Leetcode Solution	5561
63	Multiply Strings Leetcode Solution	5554
64	Count Pairs With Given Sum	5455
65	Excel Sheet Column Title Leetcode Solution	5421
66	Integer to Roman Leetcode Solution	5353
67	House Robber II Leetcode Solution	5339
68	Count and Say Leetcode Solution	5337
69	Product of array except self	5294
70	Median of Two Sorted Arrays LeetCode Solution	5279
71	Koko Eating Bananas Leetcode Solution	5233
72	Isomorphic Strings Leetcode Solution	5217
73	Largest Number Leetcode Solution	5185
74	String to Integer (atoi) LeetCode Solution	5184
75	Remove Duplicates from Sorted Array Leetcode Solution	5184
76	Find the Difference Leetcode Solution	5084
77	Set Matrix Zeroes	4983
78	Smallest window in a string containing all characters of another string	4944
79	Balanced Binary Tree Leetcode Solution	4933
80	How Many Numbers Are Smaller Than the Current Number Leetcode Solution	4912
81	Find Common Characters Leetcode Solution	4891
82	Valid Anagram Leetcode Solution	4888
83	Summary Ranges Leetcode Solution	4822
84	Happy Number Leetcode Solution	4796
85	Candy LeetCode Solution	4740
86	Subtract the Product and Sum of Digits of an Integer Leetcode Solution	4739
87	Majority Element Leetcode Solution	4730
88	Evaluation of Postfix Expression	4726
89	Rearrange Positive and Negative Numbers Alternatively in Array	4716
90	Linked List Cycle II LeetCode Solution	4712
91	Is Subsequence Leetcode Solution	4703
92	Unique Paths Leetcode Solution	4687
93	Arranging Coins Leetcode Solution	4681
94	Subset Leetcode	4519
95	Word Pattern LeetCode Solution	4497
96	Repeated Substring Pattern LeetCode Solution	4481
97	Sort Colors LeetCode Solution	4475
98	Zigzag Conversion LeetCode Solution	4446
99	Rotate String LeetCode Solution	4433
100	Reverse Integer Leetcode Solution	4404
101	Sum of minimum and maximum elements of all subarrays of size k	4400
102	Sort Array By Parity LeetCode Solution	4396
103	Find the Winner of the Circular Game LeetCode Solution	4347
104	String Compression LeetCode Solution	4333
105	Valid Palindrome II Leetcode Solution	4316
106	Bus Routes Leetcode Solution	4314
107	Asteroid Collision LeetCode Solution	4313
108	Find the Town Judge Leetcode Solution	4299
109	Find the Duplicate Number LeetCode Solution	4272
110	Sort Characters By Frequency LeetCode Solution	4254
111	Pascal Triangle Leetcode	4230
112	Best Time to Buy and Sell Stock II Leetcode Solution	4225
113	Merge Two Sorted Lists Leetcode Solutions	4218
114	Product of Array Except Self LeetCode Solution	4203
115	Employee Free Time LeetCode Solution	4194
116	First element occurring k times in an array	4182
117	Fibonacci Number LeetCode Solution	4160
118	Minimum Cost For Tickets Leetcode Solution	4135
119	A Product Array Puzzle	4124
120	Build Array From Permutation Leetcode Solution	4123
121	Divide Two Integers Leetcode Solution	4106
122	Binary Search LeetCode Solution	4088
123	Subarray with Given Sum	4068
124	Implementation of Deque using Doubly Linked List	4052
125	Kth largest element in an Array Leetcode Solutions	4051
126	Expression Evaluation	4037
127	Number of Provinces Leetcode Solution	4031
128	Best Time to Buy and Sell Stock LeetCode Solution	4031
129	Minimum Steps to reach target by a Knight	4020
130	Find Smallest Missing Number in a Sorted Array	4020
131	Increasing Triplet Subsequence LeetCode Solution	3992
132	Decode String Leetcode Solution	3989
133	Optimal Account Balancing LeetCode Solution	3988
134	Rabin Karp Algorithm	3972
135	Length of Last Word Leetcode Solution	3961
136	Postfix to Infix Conversion	3942
137	Check if the Elements of an Array are Consecutive	3909
138	H-Index Leetcode Solution	3905
139	First Unique Character in a String LeetCode Solution	3900
140	Find the Missing Number	3894
141	Matrix Chain Multiplication using Dynamic Programming	3874
142	Robot Room Cleaner Leetcode Solution	3855
143	Defanging an IP Address Leetcode Solution	3839
144	Subarray Product Less Than K LeetCode Solution	3794
145	Convert array into Zig-Zag fashion	3786
146	Page Replacement Algorithms in Operating Systems	3785
147	K-th Smallest Element in a Sorted Matrix	3784
148	Pascal’s Triangle II Leetcode Solution	3767
149	Bellman Ford Algorithm	3766
150	Form Minimum Number from Given Sequence of D’s and I’s	3756
151	Find First and Last Position of Element in Sorted Array Leetcode Solution	3723
152	Coin Change 2 Leetcode Solution	3720
153	Remove Linked List Elements Leetcode Solution	3717
154	Length of the largest subarray with contiguous elements	3705
155	Swap Nodes in Pairs Leetcode Solutions	3690
156	Backspace String Compare	3683
157	Reverse Words in a String III LeetCode Solution	3680
158	Capacity To Ship Packages Within D Days Leetcode Solution	3679
159	Prefix to Infix Conversion	3675
160	Lemonade Change Leetcode Solution	3673
161	Group Anagrams LeetCode Solution	3670
162	Guess Number Higher or Lower LeetCode Solution	3634
163	Design Parking System Leetcode Solution	3622
164	OSI Model	3622
165	Combinations Leetcode Solution	3616
166	Island Perimeter Leetcode Solution	3612
167	Iterative Implementation of Quick Sort	3612
168	Add Two Numbers II Leetcode Solution	3596
169	Majority Element II Leetcode Solution	3576
170	First negative integer in every window of size k	3558
171	Find Pair with Given Difference	3557
172	Assign Cookies Leetcode Solution	3553
173	Palindrome Linked List Leetcode Solution	3540
174	Remove All Occurrences of a Substring LeetCode Solution	3533
175	Repeated Substring Pattern	3533
176	Trapping Rain Water Leetcode Solution	3520
177	KMP Algorithm	3499
178	Max Consecutive Ones Leetcode Solution	3489
179	Last Stone Weight	3472
180	String Compression	3463
181	Remove Duplicates from Sorted Array II Leetcode Solution	3459
182	Remove Duplicates from Sorted List II LeetCode Solution	3457
183	Delete middle element of a stack	3455
184	Break a Palindrome LeetCode Solution	3437
185	Rearrange given Array in Maximum Minimum Form	3428
186	Find All Duplicates in an Array LeetCode Solution	3387
187	Generate Parentheses Leetcode Solution	3374
188	Same Tree LeetCode Solution	3365
189	Continuous Subarray Sum LeetCode Solution	3363
190	Convert a Number to Hexadecimal Leetcode Solution	3350
191	Monotonic Array LeetCode Solution	3342
192	Find N Unique Integers Sum up to Zero Leetcode Solution	3339
193	Find Leaders in an Array	3323
194	Delete Node in a Linked List Leetcode Solution	3319
195	The K Weakest Rows in a Matrix Leetcode Solution	3318
196	01 Matrix LeetCode Solution	3312
197	Moving Average from Data Stream Leetcode Solution	3311
198	Word Ladder LeetCode Solution	3304
199	Printing brackets in Matrix Chain Multiplication Problem	3263
200	Find Triplet in Array With a Given Sum	3252
201	Second Most Repeated Word in a Sequence	3236
202	Palindrome Number	3234
203	Smallest Positive Number Missing in an Unsorted Array	3231
204	Find Peak Element LeetCode Solution	3215
205	Target Sum	3215
206	Time Based Key-Value Store LeetCode Solution	3201
207	Subarray Sum Equals k	3198
208	Number of Steps to Reduce a Number to Zero Leetcode Solution	3196
209	Valid Perfect Square Leetcode Solution	3168
210	Combination Sum	3154
211	Slowest Key Leetcode Solution	3150
212	Find the Duplicate Element	3145
213	Reverse Only Letters LeetCode Solution	3143
214	Generate all Binary Strings Without Consecutive 1’s	3138
215	Rotate List Leetcode Solution	3136
216	Permutation in String Leetcode Solution	3126
217	Insert Delete GetRandom O(1) Leetcode Solution	3120
218	Leetcode Permutations	3120
219	Minimum Operations to convert X to Y	3115
220	Max Area of Island	3115
221	Check If Two String Arrays are Equivalent Leetcode Solution	3112
222	Minimum Knight Moves LeetCode Solution	3104
223	Merge k Sorted Lists Leetcode Solution	3102
224	Sum of Subarray Ranges Leetcode Solution	3100
225	Kth Largest Element in a Stream Leetcode Solution	3084
226	Unique Paths II Leetcode Solution	3080
227	Cuckoo sequence program	3080
228	Find the Row with Maximum Number of 1’s	3080
229	Top K Frequent Elements LeetCode Solution	3078
230	Maximum Product of Three Numbers LeetCode Solution	3076
231	Letter Combinations of a Phone Number	3076
232	Number of Dice Rolls With Target Sum LeetCode Solution	3058
233	Make The String Great Leetcode Solution	3058
234	Relative Sort Array Leetcode Solution	3042
235	Stock Buy Sell to Maximize Profit	3035
236	Minimum swaps required to bring all elements less than or equal to k together	3026
237	Subarray Sum Equals K LeetCode Solution	3024
238	LRU Cache LeetCode Solution	3024
239	Remove Minimum Characters so that Two Strings Become Anagrams	3024
240	Check If N and Its Double Exist Leetcode Solution	3000
241	Merge Sorted Array LeetCode Solution	2997
242	Count Good Nodes in Binary Tree Leetcode Solution	2995
243	Scramble String	2989
244	Maximize Distance to Closest Person LeetCode Solution	2981
245	Maximum Population Year LeetCode Solution	2980
246	Prefix to Postfix Conversion	2975
247	Longest Common Subsequence LeetCode Solution	2973
248	Arrange given Numbers to Form the Biggest Number II	2965
249	Find the Number Occurring Odd Number of Times in an Array	2956
250	Single Element in a Sorted Array LeetCode Solution	2954
251	Maximum Subarray Sum using Divide and Conquer	2944
252	Top K Frequent Elements	2941
253	Remove Duplicates from Sorted List LeetCode Solution	2937
254	Minimum Characters to be Added at Front to Make String Palindrome	2930
255	Relative Ranks Leetcode Solution	2923
256	Most Frequent Element in an Array	2915
257	Top K Frequent Words LeetCode Solution	2914
258	Sort Elements by Frequency of Occurrences	2912
259	License Key Formatting Leetcode Solution	2901
260	Given two unsorted arrays find all pairs whose sum is x	2886
261	Min Cost Climbing Stairs LeetCode Solution	2881
262	Maximum Sum Increasing Subsequence	2876
263	N-Queens LeetCode Solution	2869
264	Reverse individual words	2867
265	The kth Factor of n Leetcode Solution	2855
266	Search Suggestions System LeetCode Solution	2852
267	Flipping an Image LeetCode Solution	2851
268	Minimum Path Sum Leetcode Solution	2842
269	Intersection of Two Arrays	2841
270	Find any one of the multiple repeating elements in read only array	2817
271	Next Permutation	2800
272	Student Attendance Record I Leetcode Solution	2794
273	Count of index pairs with equal elements in an array	2785
274	To Lower Case Leetcode Solution	2751
275	Design A Leaderboard Leetcode Solution	2747
276	Spiral Matrix II Leetcode Solution	2745
277	Maximum Depth of Binary Tree Leetcode Solution	2739
278	Find if Path Exists in Graph Leetcode Solution	2737
279	Implement a stack using single queue	2732
280	Diagonal Traversal LeetCode Solution	2723
281	Check whether Strings are K Distance Apart or Not	2711
282	Arithmetic Expression Evaluation	2704
283	Reformat Date LeetCode Solution	2698
284	Length of Longest valid Substring	2696
285	Diagonal Traverse LeetCode Solution	2692
286	Pairs of Songs With Total Durations Divisible by 60 LeetCode Solution	2683
287	Count Number of Occurrences in a Sorted Array	2680
288	Evaluate Division	2679
289	Robot Bounded In Circle LeetCode Solution	2677
290	Maximum Size Subarray Sum Equals k Leetcode Solution	2669
291	BFS for Disconnected Graph	2664
292	Minimum number of Merge Operations to make an Array Palindrome	2659
293	Best Time to Buy and Sell Stock III Leetcode Solution	2656
294	Prim’s Algorithm	2648
295	Brightest Position on Street LeetCode Solution	2636
296	Stone Game LeetCode	2630
297	Next Greater Element III LeetCode Solution	2625
298	The Celebrity Problem	2624
299	Reverse words in a string	2601
300	Symmetric Tree Leetcode Solution	2596
301	Count of Triplets With Sum Less than Given Value	2589
302	Find Words That Can Be Formed by Characters Leetcode Solution	2585
303	Sudoku Solver	2583
304	Invalid Transactions LeetCode Solution	2577
305	Min Stack	2577
306	One Edit Distance LeetCode Solution	2564
307	Find Leaves of Binary Tree LeetCode Solution	2560
308	Find the Closest Palindrome number	2556
309	Special Array With X Elements Greater Than or Equal X Leetcode Solution	2547
310	Set Matrix Zeroes Leetcode Solution	2537
311	Longest Common Subsequence	2531
312	Find the First and Second Smallest Elements	2527
313	House Robber	2519
314	Shortest Word Distance Leetcode Solution	2513
315	Find Duplicates in an Array in Most Efficient Way	2506
316	Alien Dictionary LeetCode Solution	2494
317	Lowest Common Ancestor of a Binary Tree Leetcode Solution	2478
318	Regular Expression Matching Regular Expression Matching LeetCode Solution	2477
319	Find The Duplicate Number	2473
320	Partition Labels LeetCode Solution	2472
321	Painting Fence Algorithm	2472
322	Binary Tree Zigzag Level Order Traversal LeetCode Solution	2465
323	Pair of Positive Negative Values in an Array	2463
324	Find Top K (or Most Frequent) Numbers in a Stream	2458
325	Jump Game	2458
326	Tug of War	2453
327	Minimum operation to make all elements equal in array	2446
328	Single Number	2437
329	Invert Binary Tree LeetCode Solution	2432
330	Number of Smaller Elements on Right Side	2428
331	Construct Binary Tree from Given Inorder and Preorder Traversals	2414
332	Find minimum difference between any two elements	2413
333	Find Winner on a Tic Tac Toe Game Leetcode Solution	2400
334	Longest subarray not having more than K distinct elements	2398
335	Sort Array By Parity II Leetcode Solution	2393
336	LRU Cache Leetcode Solution	2387
337	Mobile Numeric Keypad Problem	2385
338	Minimum Time Visiting All Points Leetcode Solution	2383
339	Largest Rectangle in Histogram LeetCode Solution	2382
340	Merge Two Sorted Linked Lists	2382
341	Remove Nth Node From End of List Leetcode Solution	2381
342	Maximal Square	2379
343	Round Robin Scheduling	2378
344	Common elements in all rows of a given matrix	2376
345	N-th Tribonacci Number Leetcode Solution	2375
346	Partition Array Into Three Parts With Equal Sum Leetcode Solution	2370
347	Rank Transform of an Array Leetcode Solution	2369
348	Best Time to Buy and Sell Stock with Cooldown Leetcode Solution	2363
349	Container With Most Water LeetCode Solution	2355
350	Clone Graph LeetCode Solution	2352
351	Find Index of Closing Bracket for a Given Opening Bracket in an Expression	2350
352	Integer Break LeetCode Solution	2347
353	Reverse Bits	2347
354	Path With Maximum Minimum Value LeetCode Solution	2345
355	Minimum Depth of Binary Tree Leetcode Solution	2344
356	Combination Sum IV LeetCode Solution	2343
357	Reveal Cards In Increasing Order Leetcode Solution	2341
358	Least Number of Unique Integers after K Removals Leetcode Solution	2338
359	Check if a given array contains duplicate elements within k distance from each other	2337
360	First Circular Tour to Visit all the Petrol Bunks	2337
361	Find Maximum Level sum in Binary Tree	2333
362	Longest Palindrome can be Formed by Removing or Rearranging Characters	2333
363	Find the subarray with least average	2330
364	Minimum Cost to Hire K Workers	2330
365	Unique Paths	2320
366	Longest subsequence such that difference between adjacents is one	2318
367	Design Browser History LeetCode Solution	2317
368	Binary Tree Inorder Traversal LeetCode Solution	2314
369	Minimize Maximum Pair Sum in Array LeetCode Solution	2314
370	Minimum Moves to Equal Array Elements Leetcode Solution	2313
371	Sort a stack using a temporary stack	2312
372	Next Permutation LeetCode Solution	2308
373	Number of Closed Islands Leetcode Solution	2305
374	Find the Smallest Divisor given a Threshold Leetcode Solution	2298
375	Find the Peak Element from an Array	2296
376	Last Stone Weight II LeetCode Solution	2295
377	Remove Invalid Parentheses Leetcode Solution	2294
378	Longest Common Prefix using Sorting	2286
379	Stone Game II Leetcode	2283
380	Range Sum Query 2D – Immutable Leetcode Solution	2276
381	Consecutive Characters LeetCode Solution	2275
382	Maximum Length of a Concatenated String with Unique Characters Leetcode Solution	2274
383	LRU Cache Implementation	2268
384	Remove All Ones With Row and Column Flips Leetcode Solution	2265
385	Permutation Sequence LeetCode Solution	2264
386	K Empty Slots LeetCode	2264
387	Move All the Zeros to the End of the Given Array	2262
388	Sliding Window Technique	2259
389	Missing Element in Sorted Array LeetCode Solution	2257
390	Find duplicates in a given array when elements are not limited to a range	2257
391	Graph Valid Tree LeetCode Solution	2256
392	Maximum Circular Subarray Sum	2256
393	String Matching in an Array Leetcode Solution	2250
394	Smallest Subarray with k Distinct Numbers	2249
395	Longest Common Prefix using Trie	2241
396	Max stack	2232
397	Design a stack that supports getMin() in O(1) time and O(1) extra space	2232
398	Top View of Binary Tree	2230
399	Range Sum of BST LeetCode Solution	2228
400	Expression Contains Redundant Bracket or Not	2223
401	Dijkstra Algorithm	2222
402	Transpose Graph	2216
403	K Closest Points to Origin Leetcode Solution	2211
404	Find the Minimum Element in a Sorted and Rotated Array	2209
405	Maximum Number of Occurrences of a Substring Leetcode Solution	2207
406	Count Submatrices With All Ones LeetCode Solution	2206
407	Non-decreasing Array LeetCode Solution	2206
408	Decompress Run-Length Encoded List Leetcode Solution	2205
409	Maximum Consecutive Numbers Present in an Array	2203
410	Sorting array using Stacks	2203
411	Find a Fixed Point in a Given Array	2200
412	Queries for counts of array elements with values in given range	2197
413	Ugly Number II LeetCode Solution	2196
414	Sort elements by frequency	2196
415	Multiplication of Two Matrices	2196
416	Nth Catalan Number	2193
417	Number of Islands II LeetCode Solution	2191
418	Implementation of Deque using circular array	2191
419	Detect a loop in the Linked List	2190
420	Insert Interval Leetcode Solution	2186
421	Split Linked List in Parts Leetcode Solution	2183
422	Snakes and Ladders LeetCode Solution	2181
423	Vertical Order Traversal of Binary Tree LeetCode Solution	2176
424	Longest Increasing Path in a Matrix LeetCode Solution	2175
425	Hamming Distance Leetcode Solution	2172
426	Kth Non-repeating Character	2171
427	Given an Array of Pairs Find all Symmetric Pairs in it	2165
428	Binary Tree Maximum Path Sum LeetCode Solution	2163
429	How to Implement Stack Using Priority Queue or Heap?	2163
430	Reverse a linked list	2153
431	Replace Elements with Greatest Element on Right Side Leetcode Solution	2149
432	Can Make Arithmetic Progression From Sequence Leetcode Solution	2146
433	Integer to English words	2144
434	Number of Days Between Two Dates LeetCode Solution	2143
435	Guess Number Higher or Lower II	2143
436	Path Sum II LeetCode Solution	2136
437	Priority Queue using doubly linked list	2131
438	Merge Two Binary Trees LeetCode Solution	2128
439	Minimum Time to Collect All Apples in a Tree LeetCode Solution	2126
440	Sequences of given length where every element is more than or equal to twice of previous	2124
441	Paint House LeetCode Solution	2121
442	Majority Element	2121
443	Insert Node in the Sorted Linked List	2112
444	Largest Subarray with Equal Number of 0’s and 1’s	2111
445	Shortest Completing Word Leetcode Solution	2110
446	Minimum Path Sum	2110
447	Minesweeper LeetCode Solution	2108
448	Queries for GCD of all numbers of an array except elements in a given range	2107
449	Kth Smallest Element in a BST Leetcode Solution	2106
450	Search a 2D Matrix II Leetcode Solution	2102
451	Restore IP Addresses Leetcode Solution	2093
452	Minimum Number of Steps to Make Two Strings Anagram Leetcode Solutions	2089
453	Invert Binary Tree LeetCode Solution	2087
454	Convert Sorted Array to Binary Search Tree Leetcode Solution	2075
455	Contains Duplicate LeetCode Solution	2074
456	Minimum Absolute Difference in BST Leetcode Solution	2073
457	Iterative Method to find Height of Binary Tree	2073
458	Partition List Leetcode Solution	2071
459	Stack Permutations (Check if an array is stack permutation of other)	2070
460	Find a Peak Element II LeetCode Solution	2069
461	The Stock Span Problem	2065
462	Odd Even Linked List Leetcode Solution	2064
463	Best Time to Buy and Sell Stock	2062
464	Intersection of Two Linked Lists LeetCode Solution	2056
465	Flood Fill LeetCode	2054
466	Find All Possible Recipes from Given Supplies LeetCode Solution	2051
467	Word Search	2051
468	Unique Paths III LeetCode Solution	2050
469	Reorder Data in Log Files LeetCode Solution	2048
470	Minimum Number of Taps to Open to Water a Garden LeetCode Solution	2048
471	Palindrome Substring Queries	2048
472	Find Median from Data Stream LeetCode Solution	2047
473	Pancake Sorting Problem	2046
474	Count subarrays having total distinct elements same as original array	2045
475	Convert Sorted Array to Binary Search Tree LeetCode Solutions	2044
476	Is Graph Bipartite? LeetCode Solution	2041
477	Gold Mine Problem	2041
478	Letter Case Permutation	2039
479	Maximum Sum of Non Consecutive Elements	2039
480	Search in a Binary Search Tree Leetcode Solution	2037
481	Longest Common Prefix using Divide and Conquer	2037
482	Priority Queue in C++	2034
483	Race Car LeetCode Solution	2033
484	Number Complement Leetcode Solution	2031
485	Scramble String LeetCode Solution	2030
486	Rearrange array such that even positioned are greater than odd	2030
487	Generate all Binary Strings from Given Pattern	2027
488	Count Possible Triangles	2025
489	Reverse Nodes in k-Group LeetCode Solution	2023
490	The Maze III LeetCode Solution	2023
491	Design Hit Counter LeetCode Solution	2018
492	Implement Trie (Prefix Tree) Leetcode Solution	2011
493	Toeplitz Matrix	2007
494	Find Pythagorean Triplets from Array	1993
495	Convert BST to Min Heap	1985
496	Distance of nearest cell having 1 in a binary matrix	1975
497	Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest	1974
498	Cells with Odd Values in a Matrix LeetCode Solution	1969
499	Implement Two Stacks in an Array	1969
500	Number of Subsequences That Satisfy the Given Sum Condition LeetCode solution	1966
501	Find the first Repeating Number in a Given Array	1966
502	Shortest Palindrome	1963
503	Best Time to Buy and Sell Stock with Transaction Fee Leetcode Solution	1961
504	Recursion	1958
505	Kth ancestor of a node in binary tree	1957
506	Kruskal Algorithm	1953
507	Print all Palindromic Partitions of a String	1952
508	Minimum Jumps to Reach Home LeetCode Solution	1945
509	Maximum Subarray	1944
510	Palindrome Permutation LeetCode Solution	1940
511	Evaluate Reverse Polish Notation LeetCode Solution	1935
512	Bitwise AND of Numbers Range LeetCode Solution	1935
513	Divide Chocolate LeetCode Solution	1931
514	Group Anagrams	1931
515	Minimum Bracket Reversals	1930
516	Trapping Rain Water LeetCode Solution	1925
517	Longest Repeated Subsequence	1924
518	Postfix to Prefix Conversion	1924
519	Validate Stack Sequences LeetCode Solution	1923
520	Interval Tree	1923
521	How to Create Mergable Stack?	1922
522	Find Minimum in Rotated Sorted Array II LeetCode Solution	1920
523	Sieve of Eratosthenes	1912
524	Insert into a Binary Search Tree Leetcode Solution	1911
525	Check if Array Contains Contiguous Integers With Duplicates Allowed	1910
526	Minimum Height Trees	1910
527	Tiling Problem	1907
528	Balanced Expression with Replacement	1905
529	Longest Substring with At Least K Repeating Characters LeetCode Solution	1896
530	Maximum Length of Chain Pairs	1894
531	Jump Game IV LeetCode Solution	1892
532	Contains Duplicate	1892
533	LCS (Longest Common Subsequence) of three strings	1885
534	Maximum Element in an Array which is Increasing and then Decreasing	1885
535	Check If Array Pairs Are Divisible by k LeetCode Solution	1881
536	Different Ways to Add Parentheses Leetcode Solution	1878
537	Find the two Numbers with Odd Occurrences in an Unsorted Array	1877
538	Coin Change Problem	1876
539	Determine Whether Matrix Can Be Obtained By Rotation LeetCode Solution	1874
540	Decode String	1874
541	N queen problem	1870
542	Sort an array according to the order defined by another array	1869
543	Recover Binary Search Tree Leetcode Solution	1868
544	Sorted Linked List to Balanced BST	1867
545	Champagne Tower LeetCode Solution	1866
546	Fibonacci numbers	1866
547	Merge Overlapping Intervals	1862
548	Find a Sorted Subsequence of size 3	1861
549	High Five LeetCode Solution	1858
550	Find the Lost Element From a Duplicated Array	1858
551	Subarrays with K Different Integers Leetcode Solution	1857
552	Edit Distance LeetCode Solution	1848
553	Check if Two given Strings are Isomorphic to each other	1841
554	Decode Ways	1837
555	Build an Array With Stack Operations Leetcode Solution	1836
556	Spiral Matrix III LeetCode Solution	1834
557	Sort Colors	1831
558	Number of Distinct Islands Leetcode Solution	1827
559	Palindrome Permutations of a String	1824
560	Substring with Concatenation of All Words Leetcode Solution	1823
561	4Sum	1823
562	Merge Overlapping Intervals II	1822
563	K-th Distinct Element in an Array	1820
564	Analyze User Website Visit Pattern LeetCode Solution	1818
565	Find if an Expression has Duplicate Parenthesis or Not	1804
566	Reorder an Array According to the Given Indexes	1794
567	Maximum Depth of N-ary Tree Leetcode Solution	1791
568	Sliding Window Median Leetcode Solution	1790
569	Swapping Nodes in a Linked List Leetcode Solution	1790
570	Queue based approach for first non-repeating character in a stream	1790
571	Subset sum problem	1790
572	Rectangle Overlap LeetCode Solution	1789
573	Largest rectangular sub-matrix whose sum is 0	1787
574	Custom Sort String Leetcode Solution	1786
575	Find the Subarray of given length with Least Average	1783
576	Nearest Exit from Entrance in Maze LeetCode Solution	1779
577	Design a Stack With Increment Operation Leetcode Solution	1779
578	Maximum Number of Chocolates to be Distributed Equally Among k Students	1776
579	Merge Two Balanced Binary Search Trees	1768
580	Possible Bipartition LeetCode Solution	1766
581	Sliding Window Maximum	1764
582	Monotonic Array Leetcode Solution	1763
583	Find Largest Value in Each Tree Row LeetCode Solution	1762
584	Number of Equivalent Domino Pairs Leetcode Solution	1761
585	Detect Capital Leetcode Solution	1757
586	Camelcase Matching Leetcode Solution	1754
587	Make Two Arrays Equal by Reversing Sub-arrays Leetcode Solution	1752
588	Maximum sum rectangle in a 2D matrix	1752
589	Caesar Cipher	1749
590	Longest Substring with At Most K Distinct Characters LeetCode Solution	1747
591	Find maximum length Snake sequence	1747
592	First missing positive	1745
593	Palindromic Substrings Leetcode Solution	1738
594	Minimum Height Trees LeetCode Solution	1735
595	Maximize Elements Using Another Array	1725
596	Most Stones Removed with Same Row or Column LeetCode Solution	1723
597	Shifting Letters LeetCode Solution	1723
598	Find Maximum of Minimum for Every Window Size in a Given Array	1723
599	Maximum Product of Splitted Binary Tree LeetCode Solution	1720
600	Valid Boomerang Leetcode Solution	1719
601	Check if a Linked list of Strings form a Palindrome	1719
602	Distance Between Bus Stops Leetcode Solution	1712
603	Sliding Window Maximum LeetCode Solution	1709
604	Palindrome Partitioning Leetcode Solution	1706
605	Best Meeting Point LeetCode Solution	1705
606	3 Sum	1705
607	Sort a stack using recursion	1704
608	Sort a String According to Another String	1701
609	Contiguous Array LeetCode Solution	1690
610	Word Break	1690
611	Pair with given product	1688
612	A Space Optimized DP solution for 0-1 Knapsack Problem	1687
613	How to Efficiently Implement k Stacks in a Single Array?	1687
614	Brick Wall LeetCode Solution	1685
615	Maximum Frequency Stack Leetcode Solution	1685
616	Web Crawler LeetCode Solution	1678
617	Find all pairs (a, b) in an array such that a % b = k	1677
618	Populating Next Right Pointers in Each Node Leetcode Solution	1675
619	Minimum Sum Path in a Triangle	1674
620	Check if the given array can represent Level Order Traversal of Binary Search Tree	1674
621	Find Zeros to be Flipped so that Number of Consecutive 1’s is Maximized	1673
622	Perfect Squares LeetCode Solution	1671
623	Palindrome Permutation	1669
624	Perform String Shifts Leetcode	1669
625	Number of palindromic paths in a matrix	1668
626	Merge K Sorted Arrays and Print Sorted Output	1668
627	Check if String Follows Order of Characters by a Pattern or not	1667
628	Find the First Circular Tour that visits all the Petrol Pumps	1665
629	Elements Appear more than N/K times in Array	1663
630	Partition Problem	1662
631	Binary Tree zigzag level order Traversal	1657
632	Rearrange Spaces Between Words Leetcode Solution	1651
633	Split Array Into Consecutive Subsequences	1651
634	Count pair with Given Sum	1650
635	Find Median from data Stream	1646
636	Find the Town Judge LeetCode Solution	1645
637	Convert Sorted List to Binary Search Tree	1641
638	Morris Traversal	1637
639	Valid Sudoku	1637
640	Queue using Stacks	1624
641	Valid Parentheses Leetcode Solution	1616
642	Special Positions in a Binary Matrix Leetcode Solution	1616
643	Add two numbers	1614
644	My Calendar I LeetCode Solution	1612
645	Sort 0s 1s and 2s in an Array	1611
646	Find First and Last Position of Element in Sorted Array LeetCode Solution	1608
647	Construction of Longest Increasing Subsequence (N log N)	1605
648	Maximum Number of Ways to Partition an Array LeetCode Solution	1603
649	Maximum difference between two elements such as larger element comes after smaller	1602
650	Print Fibonacci sequence using 2 variables	1601
651	Huffman Coding	1600
652	Minimum Swaps to Group All 1’s Together Leetcode Solution	1599
653	All Unique Triplets that Sum up to a Given Value	1597
654	Print all subarrays with 0 sum	1594
655	Finding K closest element	1593
656	Word Pattern	1591
657	Construct BST from its given Level Order Traversal	1590
658	Partition to K Equal Sum Subsets Leetcode Solution	1589
659	Longest Subarray Having Count of 1s One More than Count of 0s	1587
660	Nested List Weight Sum II LeetCode Solution	1584
661	Remove Palindromic Subsequences Leetcode Solution	1584
662	Count items common to both the lists but with different prices	1583
663	Mean of Array After Removing Some Elements Leetcode Solution	1581
664	Reach a Number LeetCode Solution	1580
665	All Possible Full Binary Trees LeetCode Solution	1579
666	Reorder Array Using Given Indexes	1579
667	Count ways to reach the nth stair using step 1, 2 or 3	1578
668	Remove brackets from an algebraic string containing + and – operators	1576
669	Largest Sum Contiguous Subarray	1575
670	Recover Binary Search Tree	1575
671	Difference Array \| Range update query in O(1)	1570
672	Find whether a subarray is in form of a mountain or not	1570
673	Rearrange an Array Such that arr[i] is equal to i	1569
674	Minimum number of jumps to reach end	1568
675	Swap Kth Node from beginning with Kth Node from End	1568
676	Smallest Good Base	1565
677	Merge K Sorted Linked Lists	1554
678	Group Multiple Occurrence of Array Elements Ordered by first Occurrence	1549
679	Level order Traversal in Spiral Form	1547
680	Populating Next Right Pointers in Each Node	1547
681	Find All Pairs With a Given Difference	1547
682	Count Distinct Elements in Every Window of Size K	1546
683	MiniMax Algorithm	1546
684	Check if any two intervals overlap among a given set of intervals	1537
685	Count Minimum Steps to Get the given Array	1536
686	Lowest Common Ancestor of a Binary Search Tree Leetcode Solution	1535
687	Length of Longest Fibonacci Subsequence	1534
688	Maximum Product Subarray II	1533
689	Concatenation of Array LeetCode Solution	1528
690	Maximum Distance in Array	1525
691	Find four elements that sum to a given value (Hashmap)	1524
692	Minimum Distance Between BST Nodes Leetcode Solution	1523
693	Minimum time required to rot all oranges	1523
694	Find Duplicate Subtrees	1519
695	Construct BST from given Preorder Traversal	1518
696	Increasing Subsequence of Length three with Maximum Product	1516
697	Segregate 0s and 1s in an Array	1510
698	Linked List Cycle	1508
699	Bubble sort using two Stacks	1506
700	Count Sub Islands LeetCode Solution	1503
701	Rearrange Array such that arr[i] >= arr[j] if i is even and arr[i] <= arr[j] if i is odd and j < i	1503
702	Check for Balanced Parentheses in an Expression	1503
703	Counting Bits	1502
704	Validate Binary Search Tree	1502
705	Shortest Path in a Grid with Obstacles Elimination LeetCode Solution	1501
706	Flatten 2D Vector LeetCode Solution	1499
707	Check if Two Expressions With Brackets are Same	1496
708	Design Skiplist LeetCode Solution	1485
709	Fibonacci Number LeetCode Solution	1484
710	An Interesting Method to generate Binary Numbers from 1 to n	1483
711	Best Time to Buy and Sell Stock IV LeetCode Solution	1476
712	Binary Tree to Binary Search Tree Conversion	1465
713	Implement strStr() LeetCode Solution	1464
714	Find all triplets with zero sum	1461
715	Maximize Sum of Array after K Negations Leetcode Solution	1459
716	K maximum sums of overlapping contiguous sub-arrays	1459
717	Isomorphic Strings LeetCode Solution	1456
718	Smallest Range II Leetcode Solution	1456
719	Heap Sort	1456
720	Sorting a K Sorted Array	1453
721	Longest Common Prefix Using Binary Search II	1451
722	Binary Tree Right Side View LeetCode Solution	1447
723	Queue Reconstruction by Height	1446
724	Range Sum Query 2D – Immutable LeetCode Solution	1443
725	Inorder Successor of a node in Binary Tree	1440
726	Merge Two Sorted Lists Leetcode	1433
727	String comparison containing wildcards	1433
728	Delete Nth node from the end of the given linked list	1427
729	Find subarray with given sum (Handles Negative Numbers)	1424
730	Reverse Nodes in K-Group	1423
731	Union and Intersection of two Linked Lists	1421
732	Sum Root to Leaf Numbers LeetCode Solution	1420
733	Container with Most Water	1418
734	Symmetric Tree	1410
735	Contiguous Array Leetcode	1406
736	Minimum Swaps to Make Strings Equal Leetcode Solution	1405
737	Root to Leaf path with target sum Leetcode Solutions	1401
738	Climbing stairs	1397
739	Print a Binary Tree in Vertical Order	1396
740	Longest Common Prefix Word by Word Matching	1393
741	Vertical sum in a given binary tree	1387
742	Delete Nodes and Return Forest Leetcode Solution	1383
743	Longest Increasing Subsequence	1382
744	Merging Intervals	1382
745	Minimum Cost to Move Chips to The Same Position LeetCode Solution	1380
746	Kill Process LeetCode Solution	1379
747	Count pairs from two linked lists whose sum is equal to a given value	1379
748	Valid Parenthesis String	1373
749	Alien Dictionary	1373
750	Find K Closest Elements LeetCode Solution	1372
751	Happy Number	1371
752	Parallel Courses II LeetCode Solution	1370
753	Iterative Depth First Traversal of Graph	1369
754	Queries on Probability of Even or Odd Number in given Ranges	1366
755	Unique Binary Search Trees	1365
756	Substring With Concatenation Of All Words	1364
757	Score of Parenthesis LeetCode Solution	1362
758	Serialize and Deserialize Binary Tree LeetCode Solution	1360
759	Path Crossing Leetcode Solution	1360
760	Peak Index in a Mountain Array LeetCode Solution	1359
761	New 21 Game	1357
762	Check if a queue can be sorted into another queue using a stack	1356
763	Find Maximum Sum Possible Equal Sum of Three Stacks	1355
764	Breadth First Search (BFS) for a Graph	1350
765	Find pairs with given sum such that elements of pair are in different rows	1349
766	Median of Two Sorted Arrays	1342
767	Maximum size subarray sum equals k	1338
768	Construct Binary Tree from given Parent Array representation	1335
769	Range LCM Queries	1334
770	Tree Traversal (Preorder, Inorder & Postorder)	1332
771	Find Nth Node	1324
772	Find the Difference Leetcode Solution	1323
773	Find the largest multiple of 3	1321
774	Minimum Size Subarray Sum	1321
775	Closest Leaf in a Binary Tree LeetCode Solution	1319
776	Maximum Score After Splitting a String Leetcode Solution	1319
777	Check if a given array can represent Preorder Traversal of Binary Search Tree	1318
778	Remove duplicates from sorted array	1317
779	Find Three Element From Different Three Arrays Such That a + b + c = sum	1317
780	Non-overlapping sum of two sets	1316
781	Rotate Array	1316
782	Find Sum of all unique sub-array sum for a given array	1313
783	Verify Preorder Serialization of a Binary Tree	1313
784	Matrix Chain Multiplication	1311
785	Boolean Parenthesization Problem	1307
786	Infix to Postfix	1306
787	Iterative Preorder Traversal	1304
788	Number of siblings of a given Node in n-ary Tree	1304
789	Print all triplets in sorted array that form AP	1303
790	Given a binary tree, how do you remove all the half nodes?	1303
791	Remove Duplicates from Sorted List II	1303
792	Find Element Using Binary Search in Sorted Array	1303
793	Find K Length Subarray of Maximum Average	1300
794	Find the first repeating element in an array of integers	1298
795	Count and Say	1296
796	Count Good Nodes in Binary Tree LeetCode Solution	1292
797	Maximum subsequence sum such that no three are consecutive	1292
798	Check Completeness of a Binary Tree LeetCode Solution	1288
799	Bold Words in String LeetCode Solution	1282
800	The Painter’s Partition Problem	1279
801	Construct Binary Tree from Preorder and Postorder Traversal LeetCode Solution	1277
802	Sort Array by Increasing Frequency Leetcode Solution	1277
803	Boundary Traversal of binary tree	1277
804	Partition Equal Subset Sum	1273
805	Sum of f(a[i], a[j]) over all pairs in an array of n integers	1272
806	Find Peak Element	1271
807	Reservoir Sampling	1269
808	Find distance between two nodes of a Binary Tree	1268
809	Maximum Product Subarray	1268
810	Friends Of Appropriate Ages LeetCode Solution	1266
811	Print All Distinct Elements of a Given Integer Array	1263
812	Hamming Distance	1263
813	Employee Importance LeetCode Solution	1260
814	Subset Sum Problem in O(sum) space	1259
815	Create Maximum Number	1259
816	Isomorphic Strings	1258
817	Longest Palindromic Subsequence	1247
818	Find Common Characters Leetcode Solution	1244
819	Products of ranges in an array	1244
820	Four Elements that Sum to Given	1244
821	Level order traversal using two Queues	1240
822	Valid Anagrams	1237
823	Transform a BST to Greater sum Tree	1237
824	Minimum Remove to Make Valid Parentheses LeetCode Solution	1235
825	Flatten Binary Tree to Linked List LeetCode Solution	1234
826	Missing Number	1234
827	Largest BST Subtree LeetCode Solution	1229
828	Valid Number	1228
829	Third Maximum Number Leetcode Solution	1226
830	Distinct Subsequences	1216
831	Next Greater Element II LeetCode Solution	1214
832	Filter Restaurants by Vegan-Friendly, Price and Distance Leetcode Solution	1211
833	Largest divisible pairs subset	1208
834	Merge Two Sorted Arrays	1206
835	Palindrome Partitioning	1204
836	Defanging an IP Address LeetCode Solution	1203
837	Binary array after M range toggle operations	1203
838	Minimum Number of Arrows to Burst Balloons LeetCode Solution	1202
839	Find minimum number of merge operations to make an array palindrome	1201
840	Sort Elements by Frequency II	1199
841	Pancake Sorting	1199
842	Kth Smallest Element in a Sorted Matrix LeetCode Solution	1198
843	Count number of triplets with product equal to given number	1192
844	Super Ugly Number	1188
845	Unique Binary Search Trees LeetCode Solution	1187
846	Maximum Sum of 3 Non-Overlapping Subarrays	1187
847	BFS vs DFS for Binary Tree	1186
848	Diameter of N-Ary Tree LeetCode Solution	1185
849	Level of Each node in a Tree from source node	1183
850	Number Of Longest Increasing Subsequence	1177
851	Binary Tree Longest Consecutive Sequence LeetCode Solution	1174
852	Next Greater Element in an Array	1173
853	Integer to Roman	1172
854	Valid Triangle Number LeetCode Solution	1171
855	Kth Smallest Number in Multiplication Table Leetcode Solution	1164
856	Check if two nodes are on the same path in a Tree	1164
857	Averages of Levels in Binary Tree	1163
858	Deletion in a Binary Tree	1161
859	Maximum number of segments of lengths a, b and c	1160
860	Path Sum	1159
861	Maximum Population Year LeetCode Solution	1158
862	Permutations of a Given String Using STL	1158
863	Array Nesting Leetcode Solution	1157
864	Trapping Rain Water II LeetCode Solution	1155
865	Largest Submatrix With Rearrangements LeetCode Solution	1155
866	Maximum difference between first and last indexes of an element in array	1155
867	Maximum Side Length of a Square with Sum Less than or Equal to Threshold LeetCode Solution	1153
868	Shuffle an Array	1153
869	Reorganize String	1143
870	Find Smallest Range Containing Elements from k Lists	1142
871	Valid Triangle Number LeetCode Solution	1141
872	Insert Delete GetRandom	1140
873	Closest Binary Search Tree Value Leetcode Solution	1137
874	Compare Strings by Frequency of the Smallest Character Leetcode Solution	1133
875	Topological Sorting	1129
876	Sentence Screen Fitting LeetCode Solution	1127
877	Encoded String With Shortest Length LeetCode Solution	1123
878	Stone Game IV LeetCode Solution	1121
879	Binary Search Tree Search and Insertion	1121
880	Find Largest d in Array such that a + b + c = d	1117
881	Count the Pairs at Same Distance as in English Alphabets	1116
882	Merging Two Sorted Arrays	1116
883	Largest subarray with equal number of 0s and 1s	1112
884	Newman-Conway Sequence	1111
885	Find Minimum In Rotated Sorted Array	1110
886	Binary Search Tree Delete Operation	1108
887	Reverse a Path in BST using Queue	1107
888	Find unique character in a string	1103
889	Maximum difference between frequency of two elements such that element having greater frequency is also greater	1102
890	Count Primes in Ranges	1102
891	Minimum sum of squares of character counts in a given string after removing k characters	1102
892	Print Right View of a Binary Tree	1096
893	Valid Tic-Tac-Toe State LeetCode Solution	1094
894	Iterative Postorder Traversal Using Two Stacks	1094
895	Contiguous Array	1093
896	Lowest Common Ancestor	1092
897	Arrange given numbers to form the biggest number	1090
898	Advantages of BST over Hash Table	1086
899	First Bad Version	1085
900	Red-Black Tree Introduction	1084
901	Valid Perfect Square LeetCode Solution	1083
902	Longest Substring Without Repeating Characters Leetcode Solution	1082
903	Lower Case To Upper Case	1082
904	Maximum Product Subarray	1078
905	Sorted Array to Balanced BST	1075
906	Stone Game IV LeetCode Solution	1070
907	Range Minimum Query (Square Root Decomposition and Sparse Table)	1069
908	Longest Bitonic Subsequence	1068
909	Swap Nodes In Pairs	1067
910	Koko Eating Bananas LeetCode Solution	1066
911	Orderly Queue LeetCode Solution	1066
912	Arithmetic Slices II – Subsequence LeetCode Solution	1065
913	Balanced Binary Tree	1065
914	Serialize and Deserialize Binary Tree	1062
915	Diagonal Traversal of Binary Tree	1061
916	Minimum insertions to form a palindrome with permutations allowed	1059
917	Level Order Traversal of Binary Tree	1059
918	Friends Pairing Problem	1058
919	Largest Plus Sign Leetcode Solution	1055
920	Step-By-Step Directions From a Binary Tree Node to Another LeetCode Solution	1050
921	A program to check if a binary tree is BST or not	1042
922	Total Hamming Distance LeetCode Solution	1041
923	Check if all levels of two Binary Tree are anagrams or not	1041
924	Queries for Number of Distinct Elements in a Subarray	1040
925	Minimum Swaps To Make Sequences Increasing LeetCode Solution	1039
926	Find the smallest binary digit multiple of given number	1039
927	Construct Complete Binary Tree from its Linked List Representation	1036
928	Best Meeting Point LeetCode Solution	1035
929	Bottom View of a Binary Tree	1034
930	Height of a generic tree from parent array	1033
931	Longest Increasing Consecutive Subsequence	1019
932	Search in Sorted Rotated Array	1018
933	Dividing Array into Pairs With Sum Divisible by K	1017
934	Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’	1016
935	Edit Distance	1014
936	Guess The Word	1013
937	Maximum Sum Increasing Subsequence	1011
938	Maximum Product Subarray	1010
939	Range Sum Query using Sparse Table	1009
940	Find the node with minimum value in a Binary Search Tree	1009
941	Convert BST into a Min-Heap without using array	1008
942	Find postorder traversal of BST from preorder traversal	1007
943	Constant time range add operation on an array	1007
944	Design Add and Search Words Data Structure LeetCode Solution	1005
945	Kth Smallest Product of Two Sorted Arrays LeetCode Solution	1005
946	Print Next Greater Number of Q queries	1002
947	Check if an Array is Stack Sortable	1001
948	Shuffle a given Array	1001
949	The Number of Weak Characters in the Game LeetCode Solution	999
950	Greatest Sum Divisible by Three LeetCode Solution	999
951	Longest Common Prefix using Character by Character Matching	998
952	Print n terms of Newman-Conway Sequence	994
953	Print all Possible Ways to Break a String in Bracket Form	989
954	Next greater element	986
955	Write a function to get the intersection point of two Linked Lists	982
956	Queries on XOR of greatest odd divisor of the range	981
957	K’th Largest element in BST using constant extra space	981
958	Collect maximum points in a grid using two traversals	981
959	Print modified array after multiple array range increment operations	980
960	Group Shifted Strings Leetcode Solution	977
961	Insert into a Sorted Circular Linked List LeetCode Solution	976
962	Array Queries for multiply replacements and product	974
963	Find Maximum Depth of Nested Parenthesis in a String	969
964	Priority Queue	968
965	Design Underground System Leetcode Solution	964
966	Swim in Rising Water LeetCode Solution	962
967	K’th Largest Element in BST when modification to BST is not allowed	961
968	Segment Tree	954
969	Clone a Binary Tree with Random Pointers	951
970	Image Overlap LeetCode Solution	947
971	Merge Sort	945
972	Maximum Array from Two given Arrays Keeping Order Same	941
973	Power of Two	941
974	Count and Toggle Queries on a Binary Array	940
975	Excel Sheet Column Number LeetCode Solution	939
976	Moving Stones Until Consecutive Leetcode Solution	939
977	Minimum Possible Integer After at Most K Adjacent Swaps On Digits LeetCode Solution	936
978	Binary Search Tree	935
979	Range Queries for Longest Correct Bracket Subsequence	931
980	Write Code to Determine if Two Trees are Identical	928
981	Numbers with prime frequencies greater than or equal to k	928
982	Form minimum number from given sequence	923
983	Decrease Elements To Make Array Zigzag LeetCode Solution	912
984	Check for Palindrome after every character replacement Query	912
985	Check if each internal node of a BST has exactly one child	910
986	Cutting a Rod	908
987	K Empty Slots	904
988	Form Minimum Number From Given Sequence	902
989	Number of elements less than or equal to a given number in a given subarray	898
990	Number of Orders in the Backlog Leetcode Solution	896
991	Count even length binary sequences with same sum of first and second half bits	896
992	Merge Sorted Array	895
993	Random Pick Index LeetCode Solution	894
994	Factorial Trailing Zeroes LeetCode Solution	894
995	Merge two BSTs with limited extra space	893
996	Check if X can give change to every person in the Queue	890
997	Lowest Common Ancestor in Binary Search Tree	886
998	Regular Expression Matching	880
999	Minimum Moves to Equal Array Elements LeetCode Solution	878
1000	Insert Delete GetRandom O(1) – Duplicates allowed LeetCode Solution	868
1001	Kth Smallest Element in a BST	868
1002	Maximum weight transformation of a given string	867
1003	Shortest Unsorted Continuous Subarray LeetCode Solution	866
1004	Sum of Left Leaves LeetCode Solution	864
1005	How to print maximum number of A’s using given four keys	864
1006	Symmetric Tree LeetCode Solution Leetcode Solution	862
1007	Find maximum average subarray of k length	855
1008	Graph Cloning	852
1009	Count Pairs Whose Products Exist in Array	848
1010	Closest Binary Search Tree Value II LeetCode Solution	842
1011	Search an Element in Sorted Rotated Array	841
1012	Maximum Depth Of Binary Tree	839
1013	Queries for Decimal Values of Subarrays of a Binary Array	838
1014	Print Ancestors of a Given Binary Tree Node Without Recursion	835
1015	Unique Paths II	834
1016	Find k-th smallest element in BST (Order Statistics in BST)	830
1017	Convert a BST to a Binary Tree such that sum of all greater keys is added to every key	819
1018	Minimum Number of Operations to Move All Balls to Each Box LeetCode Solution	816
1019	Maximum Binary Tree	803
1020	Check given array of size n can represent BST of n levels or not	800
1021	Excel Sheet Column Title LeetCode Solution	781
1022	Data Structure Designing	781
1023	Iterative method to find ancestors of a given binary tree	767
1024	Palindrome Partitioning	750
1025	Next Greater Element I Leetcode Solution	726
1026	Find the Town Judge LeetCode Solution	722
1027	Find Two Non-overlapping Sub-arrays Each With Target Sum LeetCode Solution	720
1028	Binary Tree to Binary Search Tree Conversion using STL set	713
1029	Print Maximum Length Chain of Pairs	706
1030	Peeking Iterator LeetCode Solution	679
1031	Flatten Binary Tree to Linked List LeetCode Solution	612