Previous Questions

Bloomberg

ID	Questions
1	Two Sum
2	Add Two Numbers
3	Longest Substring Without Repeating Characters
4	Median of Two Sorted Arrays
5	Longest Palindromic Substring
6	Zigzag Conversion
7	Reverse Integer
8	String to Integer (atoi)
9	Palindrome Number
10	Regular Expression Matching
11	Container With Most Water
12	Integer to Roman
13	Roman to Integer
14	Longest Common Prefix
15	3Sum
16	3Sum Closest
17	Letter Combinations of a Phone Number
18	4Sum
19	Remove Nth Node From End of List
20	Valid Parentheses
21	Merge Two Sorted Lists
22	Generate Parentheses
23	Merge k Sorted Lists
24	Swap Nodes in Pairs
25	Reverse Nodes in k-Group
26	Remove Duplicates from Sorted Array
27	Remove Element
28	Find the Index of the First Occurrence in a String
29	Divide Two Integers
30	Substring with Concatenation of All Words
31	Next Permutation
32	Longest Valid Parentheses
33	Search in Rotated Sorted Array
34	Find First and Last Position of Element in Sorted Array
35	Search Insert Position
36	Valid Sudoku
37	Sudoku Solver
38	Count and Say
39	Combination Sum
40	Combination Sum II
41	First Missing Positive
42	Trapping Rain Water
43	Multiply Strings
44	Wildcard Matching
45	Jump Game II
46	Permutations
47	Permutations II
48	Rotate Image
49	Group Anagrams
50	Pow(x, n)
51	N-Queens
53	Maximum Subarray
54	Spiral Matrix
55	Jump Game
56	Merge Intervals
57	Insert Interval
58	Length of Last Word
60	Permutation Sequence
61	Rotate List
62	Unique Paths
63	Unique Paths II
64	Minimum Path Sum
66	Plus One
67	Add Binary
68	Text Justification
69	Sqrt(x)
70	Climbing Stairs
72	Edit Distance
73	Set Matrix Zeroes
74	Search a 2D Matrix
75	Sort Colors
77	Combinations
78	Subsets
79	Word Search
81	Search in Rotated Sorted Array II
82	Remove Duplicates from Sorted List II
83	Remove Duplicates from Sorted List
84	Largest Rectangle in Histogram
86	Partition List
88	Merge Sorted Array
89	Gray Code
90	Subsets II
91	Decode Ways
92	Reverse Linked List II
94	Binary Tree Inorder Traversal
95	Unique Binary Search Trees II
96	Unique Binary Search Trees
97	Interleaving String
98	Validate Binary Search Tree
99	Recover Binary Search Tree
100	Same Tree
101	Symmetric Tree
102	Binary Tree Level Order Traversal
103	Binary Tree Zigzag Level Order Traversal
104	Maximum Depth of Binary Tree
105	Construct Binary Tree from Preorder and Inorder Traversal
110	Balanced Binary Tree
111	Minimum Depth of Binary Tree
112	Path Sum
113	Path Sum II
115	Distinct Subsequences
116	Populating Next Right Pointers in Each Node
117	Populating Next Right Pointers in Each Node II
118	Pascal’s Triangle
119	Pascal’s Triangle II
120	Triangle
121	Best Time to Buy and Sell Stock
122	Best Time to Buy and Sell Stock II
123	Best Time to Buy and Sell Stock III
124	Binary Tree Maximum Path Sum
125	Valid Palindrome
126	Word Ladder II
127	Word Ladder
128	Longest Consecutive Sequence
129	Sum Root to Leaf Numbers
130	Surrounded Regions
131	Palindrome Partitioning
133	Clone Graph
134	Gas Station
135	Candy
136	Single Number
138	Copy List with Random Pointer
139	Word Break
140	Word Break II
141	Linked List Cycle
142	Linked List Cycle II
143	Reorder List
145	Binary Tree Postorder Traversal
146	LRU Cache
148	Sort List
149	Max Points on a Line
150	Evaluate Reverse Polish Notation
151	Reverse Words in a String
152	Maximum Product Subarray
153	Find Minimum in Rotated Sorted Array
155	Min Stack
158	Read N Characters Given read4 II - Call Multiple Times
159	Longest Substring with At Most Two Distinct Characters
160	Intersection of Two Linked Lists
162	Find Peak Element
164	Maximum Gap
167	Two Sum II - Input Array Is Sorted
168	Excel Sheet Column Title
169	Majority Element
172	Factorial Trailing Zeroes
173	Binary Search Tree Iterator
174	Dungeon Game
175	Combine Two Tables
177	Nth Highest Salary
179	Largest Number
181	Employees Earning More Than Their Managers
183	Customers Who Never Order
188	Best Time to Buy and Sell Stock IV
189	Rotate Array
191	Number of 1 Bits
197	Rising Temperature
198	House Robber
199	Binary Tree Right Side View
200	Number of Islands
202	Happy Number
203	Remove Linked List Elements
204	Count Primes
205	Isomorphic Strings
206	Reverse Linked List
207	Course Schedule
208	Implement Trie (Prefix Tree)
209	Minimum Size Subarray Sum
210	Course Schedule II
211	Design Add and Search Words Data Structure
212	Word Search II
213	House Robber II
215	Kth Largest Element in an Array
217	Contains Duplicate
218	The Skyline Problem
219	Contains Duplicate II
222	Count Complete Tree Nodes
224	Basic Calculator
225	Implement Stack using Queues
226	Invert Binary Tree
227	Basic Calculator II
228	Summary Ranges
229	Majority Element II
230	Kth Smallest Element in a BST
231	Power of Two
232	Implement Queue using Stacks
234	Palindrome Linked List
235	Lowest Common Ancestor of a Binary Search Tree
236	Lowest Common Ancestor of a Binary Tree
237	Delete Node in a Linked List
238	Product of Array Except Self
239	Sliding Window Maximum
240	Search a 2D Matrix II
241	Different Ways to Add Parentheses
242	Valid Anagram
252	Meeting Rooms
253	Meeting Rooms II
257	Binary Tree Paths
258	Add Digits
260	Single Number III
261	Graph Valid Tree
262	Trips and Users
263	Ugly Number
264	Ugly Number II
266	Palindrome Permutation
268	Missing Number
269	Alien Dictionary
274	H-Index
278	First Bad Version
279	Perfect Squares
283	Move Zeroes
287	Find the Duplicate Number
289	Game of Life
295	Find Median from Data Stream
297	Serialize and Deserialize Binary Tree
300	Longest Increasing Subsequence
301	Remove Invalid Parentheses
308	Range Sum Query 2D - Mutable
309	Best Time to Buy and Sell Stock with Cooldown
311	Sparse Matrix Multiplication
312	Burst Balloons
314	Binary Tree Vertical Order Traversal
315	Count of Smaller Numbers After Self
322	Coin Change
326	Power of Three
328	Odd Even Linked List
332	Reconstruct Itinerary
333	Largest BST Subtree
334	Increasing Triplet Subsequence
338	Counting Bits
341	Flatten Nested List Iterator
343	Integer Break
345	Reverse Vowels of a String
347	Top K Frequent Elements
349	Intersection of Two Arrays
350	Intersection of Two Arrays II
353	Design Snake Game
354	Russian Doll Envelopes
359	Logger Rate Limiter
362	Design Hit Counter
366	Find Leaves of Binary Tree
368	Largest Divisible Subset
371	Sum of Two Integers
373	Find K Pairs with Smallest Sums
374	Guess Number Higher or Lower
378	Kth Smallest Element in a Sorted Matrix
380	Insert Delete GetRandom O(1)
381	Insert Delete GetRandom O(1) - Duplicates allowed
384	Shuffle an Array
386	Lexicographical Numbers
387	First Unique Character in a String
389	Find the Difference
390	Elimination Game
392	Is Subsequence
394	Decode String
397	Integer Replacement
399	Evaluate Division
400	Nth Digit
402	Remove K Digits
404	Sum of Left Leaves
405	Convert a Number to Hexadecimal
410	Split Array Largest Sum
412	Fizz Buzz
413	Arithmetic Slices
415	Add Strings
416	Partition Equal Subset Sum
417	Pacific Atlantic Water Flow
420	Strong Password Checker
421	Maximum XOR of Two Numbers in an Array
424	Longest Repeating Character Replacement
433	Minimum Genetic Mutation
435	Non-overlapping Intervals
437	Path Sum III
441	Arranging Coins
443	String Compression
445	Add Two Numbers II
447	Number of Boomerangs
450	Delete Node in a BST
451	Sort Characters By Frequency
454	4Sum II
458	Poor Pigs
460	LFU Cache
463	Island Perimeter
490	The Maze
492	Construct the Rectangle
493	Reverse Pairs
494	Target Sum
496	Next Greater Element I
501	Find Mode in Binary Search Tree
503	Next Greater Element II
506	Relative Ranks
511	All Paths from Source Lead to Destination
515	Find Largest Value in Each Tree Row
516	Longest Palindromic Subsequence
518	Coin Change II
523	Continuous Subarray Sum
524	Longest Word in Dictionary through Deleting
528	Swapping Nodes in a Linked List
529	Minesweeper
532	K-diff Pairs in an Array
535	Encode and Decode TinyURL
539	Minimum Time Difference
540	Single Element in a Sorted Array
542	01 Matrix
543	Diameter of Binary Tree
545	Boundary of Binary Tree
547	Number of Provinces
550	Shortest Path to Get Food
556	Next Greater Element III
557	Reverse Words in a String III
560	Subarray Sum Equals K
566	Reshape the Matrix
567	Permutation in String
570	Managers with at Least 5 Direct Reports
582	Kill Process
583	Delete Operation for Two Strings
588	Design In-Memory File System
595	Big Countries
605	Can Place Flowers
611	Valid Triangle Number
626	Exchange Seats
628	Maximum Product of Three Numbers
632	Smallest Range Covering Elements from K Lists
633	Sum of Square Numbers
636	Exclusive Time of Functions
642	Design Search Autocomplete System
647	Palindromic Substrings
652	Find Duplicate Subtrees
653	Two Sum IV - Input is a BST
658	Find K Closest Elements
659	Split Array into Consecutive Subsequences
661	Image Smoother
662	Maximum Width of Binary Tree
665	Non-decreasing Array
669	Trim a Binary Search Tree
676	Implement Magic Dictionary
678	Valid Parenthesis String
680	Valid Palindrome II
684	Redundant Connection
692	Top K Frequent Words
694	Number of Distinct Islands
695	Max Area of Island
697	Degree of an Array
698	Partition to K Equal Sum Subsets
714	Best Time to Buy and Sell Stock with Transaction Fee
715	Range Module
716	Max Stack
718	Maximum Length of Repeated Subarray
721	Accounts Merge
723	Candy Crush
724	Find Pivot Index
729	My Calendar I
733	Flood Fill
739	Daily Temperatures
740	Delete and Earn
744	Network Delay Time
745	Find Smallest Letter Greater Than Target
747	Min Cost Climbing Stairs
750	Contain Virus
764	N-ary Tree Level Order Traversal
765	Serialize and Deserialize N-ary Tree
766	Flatten a Multilevel Doubly Linked List
777	Toeplitz Matrix
778	Reorganize String
779	Max Chunks To Make Sorted II
780	Max Chunks To Make Sorted
792	Binary Search
795	K-th Symbol in Grammar
796	Reaching Points
803	Cheapest Flights Within K Stops
807	Custom Sort String
812	Rotate String
813	All Paths From Source to Target
820	Find Eventual Safe States
826	Soup Servings
843	Binary Trees With Factors
854	Making A Large Island
855	Count Unique Characters of All Substrings of a Given String
860	Design Circular Queue
864	Image Overlap
873	Guess the Word
874	Backspace String Compare
875	Longest Mountain in Array
877	Shortest Path Visiting All Nodes
878	Shifting Letters
879	Maximize Distance to Closest Person
882	Peak Index in a Mountain Array
883	Car Fleet
886	Score of Parentheses
888	Mirror Reflection
889	Buddy Strings
890	Lemonade Change
893	All Nodes Distance K in Binary Tree
898	Transpose Matrix
907	Koko Eating Bananas
908	Middle of the Linked List
917	Boats to Save People
922	Possible Bipartition
924	Fair Candy Swap
930	All Possible Full Binary Trees
931	Maximum Frequency Stack
937	Online Stock Span
944	Smallest Range I
948	Sort an Array
954	Maximum Sum Circular Subarray
961	Long Pressed Name
967	Minimum Falling Path Sum
969	Number of Recent Calls
971	Shortest Bridge
972	Knight Dialer
985	Bag of Tokens
1007	Numbers With Same Consecutive Differences
1013	Fibonacci Number
1019	Squares of a Sorted Array
1023	Time Based Key-Value Store
1025	Minimum Cost For Tickets
1028	Interval List Intersections
1029	Vertical Order Traversal of a Binary Tree
1033	Broken Calculator
1035	Cousins in Binary Tree
1036	Rotting Oranges
1039	Find the Town Judge
1046	Max Consecutive Ones III
1050	Construct Binary Search Tree from Preorder Traversal
1055	Pairs of Songs With Total Durations Divisible by 60
1056	Capacity To Ship Packages Within D Days
1073	Number of Enclaves
1095	Two City Scheduling
1105	Uncrossed Lines
1119	Robot Bounded In Circle
1127	Last Stone Weight
1128	Remove All Adjacent Duplicates In String
1129	Longest String Chain
1130	Last Stone Weight II
1165	Meeting Scheduler
1170	Shortest Common Supersequence
1171	Shortest Path in Binary Matrix
1176	Design A Leaderboard
1179	Game Play Analysis I
1184	Car Pooling
1185	Find in Mountain Array
1194	Path In Zigzag Labelled Binary Tree
1196	Filling Bookcase Shelves
1212	Sequential Digits
1228	Minimum Cost Tree From Leaf Values
1229	Shortest Path with Alternating Colors
1233	Number of Ships in a Rectangle
1240	Stone Game II
1245	User Activity for the Past 30 Days I
1250	Longest Common Subsequence
1253	Sort the Matrix Diagonally
1255	Reverse Subarray To Maximize Array Value
1256	Rank Transform of an Array
1258	Article Views I
1263	Number of Dice Rolls With Target Sum
1271	Web Crawler
1272	Invalid Transactions
1300	Critical Connections in a Network
1306	Minimum Absolute Difference
1319	Unique Number of Occurrences
1320	Remove All Adjacent Duplicates in String II
1371	Minimum Remove to Make Valid Parentheses
1382	Calculate Amount Paid in Taxes
1388	Greatest Sum Divisible by Three
1414	Shortest Path in a Grid with Obstacles Elimination
1427	All Elements in Two Binary Search Trees
1451	Minimum Number of Taps to Open to Water a Garden
1454	Remove Palindromic Subsequences
1460	Number of Substrings Containing All Three Characters
1464	Reduce Array Size to The Half
1465	Maximum Product of Splitted Binary Tree
1469	Minimum Number of Steps to Make Two Strings Anagram
1476	Count Negative Numbers in a Sorted Matrix
1479	Construct Target Array With Multiple Sums
1488	Sort Integers by The Power Value
1492	Time Needed to Inform All Employees
1503	Reducing Dishes
1512	Design Underground System
1537	Maximum Score After Splitting a String
1538	Maximum Points You Can Obtain from Cards
1569	Max Dot Product of Two Subsequences
1571	Allocate Mailboxes
1576	Reorder Routes to Make All Paths Lead to the City Zero
1580	Shuffle the Array
1582	Design Browser History
1603	Running Sum of 1d Array
1605	Minimum Number of Days to Make m Bouquets
1617	Stone Game IV
1621	Number of Subsequences That Satisfy the Given Sum Condition
1646	Kth Missing Positive Number
1650	Find Root of N-Ary Tree
1669	Minimum Cost to Cut a Stick
1676	Minimum Number of Days to Eat N Oranges
1700	Minimum Time to Make Rope Colorful
1704	Special Positions in a Binary Matrix
1705	Count Unhappy Friends
1708	Design Parking System
1713	Dot Product of Two Sparse Vectors
1731	Even Odd Tree
1737	Maximum Nesting Depth of the Parentheses
1741	Sort Array by Increasing Frequency
1762	Furthest Building You Can Reach
1770	Minimum Deletions to Make Character Frequencies Unique
1775	Design an Ordered Stream
1782	Smallest String With A Given Numeric Value
1798	Max Number of K-Sum Pairs
1801	Average Time of Process per Machine
1814	Jump Game VI
1829	Maximum Units on a Truck
1838	Number of Distinct Substrings in a String
1903	Design Most Recently Used Queue
1906	Maximize Score After N Operations
1908	Recyclable and Low Fat Products
1915	Check if One String Swap Can Make Strings Equal
1929	Maximum Value at a Given Index in a Bounded Array
1944	Truncate Sentence
1948	Rearrange Products Table
1951	Find the Winner of the Circular Game
1960	Check if the Sentence Is Pangram
1969	Maximum Number of Accepted Invitations
1970	Sorting the Sentence
1983	Maximum Population Year
1992	Sort Linked List Already Sorted Using Absolute Values
2005	Check if All the Integers in a Range Are Covered
2015	Determine Whether Matrix Can Be Obtained By Rotation
2042	Maximum Product Difference Between Two Pairs
2090	Number of Ways to Arrive at Destination
2091	Number of Ways to Separate Numbers
2137	Final Value of Variable After Performing Operations
2161	Stock Price Fluctuation
2213	Find All People With Secret
2246	Maximum Employees to Be Invited to a Meeting
2271	Rearrange Array Elements by Sign
2283	Sort Even and Odd Indices Independently
2285	Design Bitset
2286	Minimum Time to Remove All Cars Containing Illegal Goods
2331	Intersection of Multiple Arrays
2334	Number of Flowers in Full Bloom
2357	Count Integers in Intervals
2360	Substring With Largest Variance
2383	Add Two Integers
2532	Remove Letter To Equalize Frequency
2554	Minimum Total Distance Traveled
2598	Shortest Distance to Target String in a Circular Array
2614	Maximum Count of Positive Integer and Negative Integer
2646	Kth Largest Sum in a Binary Tree
2714	Left and Right Sum Differences
2733	Sleep
2739	Minimize the Total Price of the Trips
2754	Maximum Strength of a Group
2755	Extra Characters in a String