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Bloomberg Master DSA Sheet

This compilation contains exclusive, previously asked data structure and algorithm questions from real Bloomberg interviews. Focus on these core problem patterns to confidently tackle even the hardest interview challenges.

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Difference Between Element Sum and Digit Sum of an Array
Jump Game II6 Months
Second Highest Salary6 Months
Best Sightseeing Pair
Max Difference You Can Get From Changing an Integer
Find a Peak Element II
Walking Robot Simulation
Special Array II
Maximum Alternating Subsequence Sum
Find Followers Count
Minimum Index Sum of Two Lists
Longest Univalue Path
Reverse Prefix of Word
Minimized Maximum of Products Distributed to Any Store
Determine if Two Strings Are Close6 Months
Minimum Number of Steps to Make Two Strings Anagram3 Months
Minimum Score of a Path Between Two Cities
Count Good Triplets
Convert Sorted List to Binary Search Tree
Special Array I
Grumpy Bookstore Owner
Find Closest Number to Zero
Asteroid Collision
Smallest Range Covering Elements from K Lists
Invalid Tweets
Monthly Transactions I6 Months
Majority Element II6 Months
Find Greatest Common Divisor of Array
Minimum Genetic Mutation
Delete Characters to Make Fancy String
Tree Node
Avoid Flood in The City6 Months
Minimum Bit Flips to Convert Number
Valid Parentheses30 Days
Min Stack3 Months
Customer Who Visited but Did Not Make Any Transactions6 Months
Minimum Penalty for a Shop
Dota2 Senate
Alternating Groups II
Paint House IV
Subarray Product Less Than K3 Months
Word Ladder II
Maximum Tastiness of Candy Basket
N-Queens II6 Months
Insert Delete GetRandom O(1) - Duplicates allowed6 Months
Average Salary Excluding the Minimum and Maximum Salary
Largest Number After Digit Swaps by Parity
Kth Smallest Element in a Sorted Matrix
Open the Lock6 Months
Find the Length of the Longest Common Prefix
Permutation Sequence
K-th Smallest Prime Fraction
Meeting Rooms II30 Days
Find the Integer Added to Array I
Minimum Moves to Convert String
Longest Nice Subarray
Design A Leaderboard3 Months
User Activity for the Past 30 Days I6 Months
Longest Subarray of 1's After Deleting One Element
Longest Happy String
Score After Flipping Matrix
Number of People Aware of a Secret6 Months
Furthest Building You Can Reach
Course Schedule II6 Months
Binary Gap6 Months
Non-negative Integers without Consecutive Ones
Reverse Linked List6 Months
Design Tic-Tac-Toe
Minimum Height Trees
Number of Ways to Divide a Long Corridor
Largest 3-Same-Digit Number in String
Check If a Word Occurs As a Prefix of Any Word in a Sentence
Top K Frequent Words3 Months
Brick Wall6 Months
Spiral Matrix3 Months
Unique Binary Search Trees
Minimum Deletions to Make String Balanced
Pacific Atlantic Water Flow
Shortest Distance from All Buildings
Letter Case Permutation
Count Equal and Divisible Pairs in an Array
Market Analysis I
Count the Number of Arrays with K Matching Adjacent Elements
Investments in 2016
Zigzag Conversion6 Months
Linked List in Binary Tree
Find Common Characters
Find Resultant Array After Removing Anagrams
Vowel Spellchecker6 Months
Copy List with Random Pointer6 Months
Longest String Chain
Longest Harmonious Subsequence
Maximum Depth of Binary Tree
Find Numbers with Even Number of Digits
Maximum Product of Two Elements in an Array
The Number of the Smallest Unoccupied Chair
Find Original Array From Doubled Array
Substring with Concatenation of All Words
Construct Quad Tree
All Nodes Distance K in Binary Tree
Create Target Array in the Given Order
Search Suggestions System
Longest Substring Without Repeating Characters30 Days
Pow(x, n)3 Months
Longest Palindromic Substring30 Days
Baseball Game6 Months
Pass the Pillow
Diameter of Binary Tree
Maximum Distance in Arrays
Minimum Cost For Tickets
Partition Array Into Two Arrays to Minimize Sum Difference
Find Closest Node to Given Two Nodes
Unique Morse Code Words
Find Subarrays With Equal Sum
Matrix Cells in Distance Order
Time Based Key-Value Store6 Months
Two City Scheduling30 Days
Trapping Rain Water3 Months
Find Beautiful Indices in the Given Array I
Compare Version Numbers
Climbing Stairs30 Days
Design Spreadsheet6 Months
Invalid Transactions30 Days
Product of Array Except Self3 Months
Minimum Number of Days to Make m Bouquets
Battleships in a Board
Merge Intervals30 Days
Count Salary Categories
Maximum Sum Circular Subarray
Minimum Cost to Move Chips to The Same Position
Power of Four
Generate Parentheses3 Months
Serialize and Deserialize Binary Tree
Transpose Matrix
1-bit and 2-bit Characters6 Months
Verifying an Alien Dictionary
Managers with at Least 5 Direct Reports6 Months
Design HashSet
Finding Pairs With a Certain Sum
K Closest Points to Origin
Count the Number of Consistent Strings
Maximum Product Subarray30 Days
Count the Hidden Sequences
Find K Closest Elements
Nth Highest Salary6 Months
The Number of Employees Which Report to Each Employee
Divide Intervals Into Minimum Number of Groups
Kth Smallest Element in a BST3 Months
Clone Graph
Path Sum III
Koko Eating Bananas3 Months
Subtract the Product and Sum of Digits of an Integer
Movie Rating
Split Array Largest Sum6 Months
Next Permutation30 Days
Next Greater Numerically Balanced Number6 Months
Binary Tree Paths
Two Sum IV - Input is a BST6 Months
Car Pooling
Number of Visible People in a Queue
Number of Ways to Form a Target String Given a Dictionary
Minimum Difference Between Highest and Lowest of K Scores
Reverse Nodes in Even Length Groups
Students and Examinations6 Months
Palindrome Partitioning II
Count Good Triplets in an Array
Convert Binary Number in a Linked List to Integer
Find Winner on a Tic Tac Toe Game
First Missing Positive6 Months
Maximum Number of Tasks You Can Assign
Permutation in String3 Months
Exchange Seats6 Months
Maximum Profit in Job Scheduling
Maximum Palindromes After Operations
Unique Paths II3 Months
Maximum Width Ramp
Minimum Window Substring3 Months
Daily Temperatures30 Days
My Calendar I
Minimum Length of String After Operations
Find the Prefix Common Array of Two Arrays
Group the People Given the Group Size They Belong To
Valid Word
House Robber III
Calculate Amount Paid in Taxes
Task Scheduler
Check If It Is a Good Array
Merge Two Binary Trees
Find All Numbers Disappeared in an Array6 Months
IPO6 Months
Max Chunks To Make Sorted
Find All Anagrams in a String
Valid Palindrome II3 Months
Average Time of Process per Machine
Wildcard Matching3 Months
Number of 1 Bits
Count Elements With Maximum Frequency
Divisor Game
Rotate Image3 Months
Basic Calculator II3 Months
Reverse Bits3 Months
The Number of Beautiful Subsets
Random Pick with Weight
Decoded String at Index
Maximum Sum BST in Binary Tree
Valid Sudoku30 Days
Rabbits in Forest
Maximum Swap
Check if All the Integers in a Range Are Covered
Remove All Occurrences of a Substring
Capacity To Ship Packages Within D Days6 Months
Longest Repeating Character Replacement3 Months
Minimum Number of K Consecutive Bit Flips
Largest Number6 Months
Regular Expression Matching6 Months
Find Words That Can Be Formed by Characters
Game of Life
Longest Strictly Increasing or Strictly Decreasing Subarray
Count Vowel Strings in Ranges
Middle of the Linked List3 Months
Sqrt(x)3 Months
Find the Distance Value Between Two Arrays
Isomorphic Strings3 Months
Shortest Bridge
Valid Number
Trapping Rain Water II
Self Crossing6 Months
Maximal Square
Combination Sum6 Months
Reverse Words in a String6 Months
Find All Possible Recipes from Given Supplies
Longest Arithmetic Subsequence
Flower Planting With No Adjacent
Palindromic Substrings6 Months
Design Circular Queue
Number of Islands30 Days
Longest Common Subsequence6 Months
Exclusive Time of Functions
Making A Large Island
Word Search II6 Months
Max Sum of a Pair With Equal Sum of Digits
Longest Valid Parentheses30 Days
Permutations6 Months
Interval List Intersections
Add Binary30 Days
Count Binary Substrings30 Days
Roman to Integer30 Days
Merge Sorted Array30 Days
Linked List Cycle II6 Months
Two Sum II - Input Array Is Sorted3 Months
Partition Array Into Three Parts With Equal Sum
Toeplitz Matrix
Set Matrix Zeroes
Broken Calculator
Pascal's Triangle6 Months
Maximum Total Damage With Spell Casting
Single Number III
Product of the Last K Numbers
Shortest Path in Binary Matrix6 Months
Find Minimum Time to Reach Last Room I
Restore IP Addresses
Sliding Window Median
Container With Most Water30 Days
Fair Candy Swap6 Months
Course Schedule6 Months
Count and Say3 Months
Bus Routes3 Months
Insert Delete GetRandom O(1)30 Days
Lemonade Change6 Months
Longest Common Prefix3 Months
Max Points on a Line
Search a 2D Matrix II6 Months
Restaurant Growth6 Months
Insert Interval
Successful Pairs of Spells and Potions
Maximum Sum of Distinct Subarrays With Length K
Minimum Cost Path with Edge Reversals6 Months
Check if a Parentheses String Can Be Valid
Logger Rate Limiter
Valid Perfect Square
Rank Teams by Votes6 Months
Height Checker
Guess the Word6 Months
Backspace String Compare
Minimum Number of Refueling Stops
Search in Rotated Sorted Array3 Months
Angle Between Hands of a Clock
Rotting Oranges30 Days
String Compression
Find the Index of the First Occurrence in a String3 Months
Binary Tree Cameras
Find the Smallest Divisor Given a Threshold
Basic Calculator
Snakes and Ladders
Couples Holding Hands
Number of Ships in a Rectangle30 Days
Robot Bounded In Circle
Non-overlapping Intervals30 Days
Maximum Number of Vowels in a Substring of Given Length
Two Sum30 Days
Minimum Number of Operations to Make Array Continuous
Last Person to Fit in the Bus
Heaters
Excel Sheet Column Number
Move Zeroes30 Days
LFU Cache6 Months
Single Element in a Sorted Array3 Months
Taking Maximum Energy From the Mystic Dungeon6 Months
Remove K Digits6 Months
Minimum Increment to Make Array Unique
Intersection of Two Linked Lists
Kth Largest Element in a Stream
Burst Balloons
Populating Next Right Pointers in Each Node II6 Months
Decode String30 Days
Word Ladder30 Days
Alice and Bob Playing Flower Game
Edit Distance3 Months
Range Sum Query 2D - Immutable
Squares of a Sorted Array6 Months
Walls and Gates
Distribute Coins in Binary Tree
Count Univalue Subtrees
Bitwise ORs of Subarrays
Beautiful Arrangement
Maximum Subarray3 Months
Find the Minimum Area to Cover All Ones I
Contains Duplicate3 Months
Closest Prime Numbers in Range
Count Vowel Substrings of a String
All O`one Data Structure
LRU Cache30 Days
Range Product Queries of Powers
Path With Minimum Effort
The Skyline Problem6 Months
Design Underground System30 Days
Subsets II6 Months
Make The String Great
Remove Zero Sum Consecutive Nodes from Linked List
Palindrome Permutation
Final Prices With a Special Discount in a Shop
Concatenation of Array6 Months
Merge Two Sorted Lists3 Months
Subarrays with K Different Integers6 Months
Reconstruct Itinerary
Implement Stack using Queues
Add to Array-Form of Integer
Count Square Sum Triples6 Months
Jump Game3 Months
Maximum Candies You Can Get from Boxes
Best Time to Buy and Sell Stock30 Days
Lowest Common Ancestor of a Binary Tree6 Months
Largest Local Values in a Matrix
Monotonic Array
All Paths From Source to Target3 Months
Count Unhappy Friends3 Months
Same Tree3 Months
Construct K Palindrome Strings
Dungeon Game
Find All Duplicates in an Array6 Months
Top K Frequent Elements30 Days
Multiply Strings6 Months
Combine Two Tables30 Days
Number of Matching Subsequences
Flood Fill
Regions Cut By Slashes
Minimum Remove to Make Valid Parentheses30 Days
Fibonacci Number6 Months
Average Selling Price
Palindrome Partitioning6 Months
Minimum Path Sum6 Months
Decode Ways6 Months
Valid Anagram30 Days
Super Egg Drop6 Months
Maximum Score From Removing Substrings
Reverse String6 Months
Number of Students Unable to Eat Lunch6 Months
Minimum Cost Tree From Leaf Values
Sum of Two Integers
Minimum Cuts to Divide a Circle
Median of Two Sorted Arrays30 Days
Design Hit Counter3 Months
Recyclable and Low Fat Products3 Months
Construct Binary Tree from String
Number of Digit One6 Months
Sum of Square Numbers
Valid Palindrome3 Months
Online Stock Span6 Months
Critical Connections in a Network
N-Queens3 Months
Immediate Food Delivery II
Replace Words
Symmetric Tree6 Months
Largest Rectangle in Histogram3 Months
Student Attendance Record II
Number of Recent Calls6 Months
Make Sum Divisible by P
Greatest Common Divisor of Strings
Majority Element30 Days
Binary Tree Right Side View6 Months
Minimum Operations to Make Binary Array Elements Equal to One I
Score of Parentheses
3Sum30 Days
Number of Perfect Pairs
Remove All Adjacent Duplicates in String II30 Days
Maximum XOR for Each Query
Letter Combinations of a Phone Number3 Months
Minimum Absolute Difference6 Months
Find the Duplicate Number3 Months
Word Search30 Days
Remove Linked List Elements6 Months
Gas Station6 Months
Group Anagrams3 Months
Simplify Path6 Months
Island Perimeter
Max Consecutive Ones III30 Days
Candy Crush
3Sum Closest3 Months
Reverse Nodes in k-Group
Find Users With Valid E-Mails6 Months
Moving Average from Data Stream
Remove K-Balanced Substrings
Subarray Sum Equals K3 Months
Longest Balanced Subarray I6 Months
Triangle30 Days
Delete Node in a BST6 Months
Rectangle Area
Binary Tree Maximum Path Sum6 Months
Maximum Units on a Truck
Add Two Numbers30 Days
Maximal Rectangle30 Days
Integer to Roman3 Months
Delete Duplicate Folders in System
Find the Town Judge6 Months
Palindrome Number3 Months
Diagonal Traverse6 Months
Merge k Sorted Lists30 Days
Partition Equal Subset Sum3 Months
Network Delay Time
The Maze
Evaluate Division30 Days
Consecutive Numbers6 Months
Contiguous Array
Permutations II3 Months
Rotate Array6 Months
Find the City With the Smallest Number of Neighbors at a Threshold Distance
Best Time to Buy and Sell Stock II6 Months
Shortest Palindrome
Divide Array Into Arrays With Max Difference
Implement Trie (Prefix Tree)3 Months
Design Add and Search Words Data Structure6 Months
Construct Binary Tree from Inorder and Postorder Traversal
Word Break II30 Days
Trips and Users
Find Duplicate Subtrees
Minimum One Bit Operations to Make Integers Zero6 Months
Sum of Subarray Minimums6 Months
Reorder List3 Months
Maximum Repeating Substring
Sort Colors3 Months
Distinct Subsequences3 Months
Sentence Similarity III
Reverse Vowels of a String30 Days
Find Bottom Left Tree Value
Palindrome Linked List30 Days
Target Sum
Minimum Common Value
House Robber6 Months
The k-th Lexicographical String of All Happy Strings of Length n
Ugly Number
Longest Duplicate Substring
Validate Binary Search Tree3 Months
Add Digits
Arranging Coins3 Months
Number of Ways to Split Array
Find Lucky Integer in an Array
Coin Change II6 Months
Find the Highest Altitude
Minimum Interval to Include Each Query
Unique Paths6 Months
Reverse Substrings Between Each Pair of Parentheses
Next Greater Node In Linked List6 Months
Soup Servings
Degree of an Array
Longest Continuous Increasing Subsequence
Balanced Binary Tree3 Months
Defanging an IP Address6 Months
Kill Process
Sort Characters By Frequency6 Months
N-th Tribonacci Number
Best Time to Buy and Sell Stock III
Count Number of Nice Subarrays6 Months
Next Greater Element III
Remove Letter To Equalize Frequency3 Months
Sum Root to Leaf Numbers
Length of Last Word6 Months
Design Linked List
Range Sum of BST
Largest Triangle Area6 Months
Smallest Subtree with all the Deepest Nodes6 Months
Minimum Time Difference
Minimum Obstacle Removal to Reach Corner
Word Subsets
Lowest Common Ancestor of a Binary Search Tree
Best Time to Buy and Sell Stock with Cooldown
Lowest Common Ancestor of Deepest Leaves
Largest Number At Least Twice of Others
Convert Sorted Array to Binary Search Tree
Number of Closed Islands
Contains Duplicate II3 Months
Remove Duplicate Letters
4Sum3 Months
Project Employees I6 Months
First Unique Character in a String30 Days
Plus One30 Days
Sort List30 Days
Create a DataFrame from List
Shortest Unsorted Continuous Subarray
Populating Next Right Pointers in Each Node30 Days
Search in Rotated Sorted Array II6 Months
Vertical Order Traversal of a Binary Tree3 Months
Add Strings3 Months
Find the Winner of the Circular Game3 Months
Meeting Rooms III
Power of Two6 Months
Max Consecutive Ones3 Months
Can Place Flowers6 Months
Find Center of Star Graph
Intersection of Two Arrays II
Long Pressed Name
Reverse Words in a String III
Duplicate Emails30 Days
Time Needed to Buy Tickets
Article Views I3 Months
Maximum Points You Can Obtain from Cards
Minimum Number of Swaps to Make the String Balanced
Divide Two Integers3 Months
Happy Number3 Months
Remove All Adjacent Duplicates In String3 Months
Integer to English Words
Find Minimum in Rotated Sorted Array3 Months
Sudoku Solver3 Months
Minimum Size Subarray Sum6 Months
Merge Strings Alternately6 Months
Word Break30 Days
Find Missing Observations
Water Bottles
Longest Consecutive Sequence3 Months
Last Stone Weight6 Months
String to Integer (atoi)3 Months
Relative Ranks6 Months
Check if Array Is Sorted and Rotated6 Months
Combinations
Reorganize String
Sliding Window Maximum3 Months
Find K Pairs with Smallest Sums
Next Greater Element I3 Months
Count Pairs Whose Sum is Less than Target
Max Area of Island6 Months
Word Pattern6 Months
Find First and Last Position of Element in Sorted Array3 Months
Cheapest Flights Within K Stops
Binary Tree Zigzag Level Order Traversal6 Months
Add Two Numbers II30 Days
Sum of Digits of String After Convert
Fruit Into Baskets6 Months
Is Subsequence
Expression Add Operators
Minimum Falling Path Sum6 Months
Count Good Numbers6 Months
Single Number II
Nearest Exit from Entrance in Maze
Ugly Number II
Department Top Three Salaries
Delete Duplicate Emails
Product Sales Analysis I
Implement Queue using Stacks
Sum of Unique Elements
Combination Sum II3 Months
Car Fleet
Interleaving String
Candy6 Months
Maximum Product of Splitted Binary Tree
Assign Cookies
Rising Temperature3 Months
Add Two Integers
Find Median from Data Stream6 Months
Divide Array Into Equal Pairs
Employee Bonus
Delete and Earn
Remove Nth Node From End of List6 Months
Insert into a Binary Search Tree
Find Peak Element3 Months
Maximum Product of Three Numbers6 Months
Rotate String6 Months
K-diff Pairs in an Array
Longest Increasing Subsequence3 Months
Summary Ranges
Remove Digit From Number to Maximize Result
Delete the Middle Node of a Linked List
House Robber II3 Months
Is Graph Bipartite?
Remove Duplicates from Sorted Array3 Months
How Many Numbers Are Smaller Than the Current Number
Sort Array by Increasing Frequency
Convert a Number to Hexadecimal
Relative Sort Array
Cinema Seat Allocation6 Months
Smallest String With Swaps
Odd Even Linked List6 Months
Count Mentions Per User
Missing Number30 Days
Minimum Time to Make Rope Colorful
Patching Array
Kth Largest Element in an Array6 Months
Remove Element30 Days
Truncate Sentence
Find Score of an Array After Marking All Elements
Intersection of Two Arrays6 Months
Fraction to Recurring Decimal6 Months
Count Servers that Communicate
Largest Positive Integer That Exists With Its Negative
Fizz Buzz
Maximum Population Year
Jewels and Stones6 Months
Subsets3 Months
Longest Nice Substring
Reverse Linked List II6 Months
Champagne Tower30 Days
Number of Good Pairs
Minimum Number of Arrows to Burst Balloons
Number of Substrings Containing All Three Characters
Reverse Integer3 Months
Path In Zigzag Labelled Binary Tree
All Possible Full Binary Trees
Maximum Length of Repeated Subarray
Number of Provinces3 Months
Find Customer Referee
Unique Paths III
Replace Non-Coprime Numbers in Array6 Months
Best Time to Buy and Sell Stock with Transaction Fee
N-Repeated Element in Size 2N Array
Coin Change30 Days
Minimum Number of Removals to Make Mountain Array
Shuffle the Array
Spiral Matrix II
Path Sum II
Find And Replace in String
Search Insert Position3 Months
Matrix Diagonal Sum
Maximum Number of Events That Can Be Attended
Continuous Subarray Sum3 Months
Decrypt String from Alphabet to Integer Mapping
Next Greater Element II6 Months
Number of Distinct Islands6 Months
Flatten Binary Tree to Linked List3 Months
Delete Node in a Linked List6 Months
Find Missing and Repeated Values3 Months
01 Matrix
Perfect Squares
Excel Sheet Column Title6 Months
Sort an Array6 Months
Cousins in Binary Tree
Text Justification
Divide Players Into Teams of Equal Skill
132 Pattern
Sum of Beauty of All Substrings
Design Browser History30 Days
Find the Longest Substring Containing Vowels in Even Counts
Shortest Path in a Hidden Grid
Longest Palindromic Subsequence
Count Numbers with Unique Digits
Find N Unique Integers Sum up to Zero
Scramble String
Dot Product of Two Sparse Vectors3 Months
Reverse Pairs6 Months
Human Traffic of Stadium
Repeated DNA Sequences6 Months
Range Sum Query - Immutable6 Months
Maximum Candies Allocated to K Children
Maximum Matrix Sum3 Months
Count the Number of Substrings With Dominant Ones
Maximum Average Subarray I3 Months
Sum of Mutated Array Closest to Target6 Months
Longest Balanced Substring II
Repeated String Match
Shortest Subarray with Sum at Least K
Bulb Switcher
Number of Good Paths
Big Countries6 Months
Continuous Subarrays
2 Keys Keyboard
Subarray Sums Divisible by K
Count Primes6 Months
Sparse Matrix Multiplication
Binary Tree Level Order Traversal3 Months
Custom Sort String
Game Play Analysis IV
Letter Tile Possibilities
Percentage of Users Attended a Contest
Grid Game
Remove Duplicates from Sorted List6 Months
Max Number of K-Sum Pairs
Memoize
Design an Ordered Stream30 Days
Smallest Integer Divisible by K
Read N Characters Given read4 II - Call Multiple Times
Integer Break
Unique Number of Occurrences
Kth Smallest Product of Two Sorted Arrays
Sum of Left Leaves
Kth Missing Positive Number3 Months
Parsing A Boolean Expression
Find in Mountain Array3 Months
Replace Employee ID With The Unique Identifier
Confirmation Rate6 Months
Shifting Letters
Construct Binary Search Tree from Preorder Traversal
Min Cost Climbing Stairs
Nim Game
Search a 2D Matrix3 Months
Wiggle Sort II3 Months
Frequency of the Most Frequent Element6 Months
Design Twitter
Design Search Autocomplete System3 Months
Linked List Components
Put Marbles in Bags
Shortest Path in a Grid with Obstacles Elimination
Lexicographical Numbers
Minimum Add to Make Parentheses Valid
Clumsy Factorial
Filling Bookcase Shelves
Create Maximum Number6 Months
Find Subsequence of Length K With the Largest Sum
Find the Lexicographically Largest String From the Box I
Partition List6 Months
Valid Parenthesis String
Maximum Frequency Stack6 Months
Remove Duplicates from Sorted List II6 Months
House Robber IV
Contains Duplicate III6 Months
Primary Department for Each Employee6 Months
Minimum Operations to Make Array Equal to Target
Count the Number of Fair Pairs
Maximum Gap
Binary Search Tree Iterator
Invert Binary Tree6 Months
Combination Sum IV6 Months
Increasing Triplet Subsequence6 Months
Maximum Manhattan Distance After K Changes
Product Price at a Given Date6 Months
Redundant Connection
Separate Black and White Balls
Count of Smaller Numbers After Self6 Months
Maximum Number of Points From Grid Queries
Russian Doll Envelopes
Kids With the Greatest Number of Candies
Subtree of Another Tree
Number of Distinct Substrings in a String
Path Sum6 Months
Search in a Binary Search Tree
Surrounded Regions6 Months
Find the Difference3 Months
Binary Search3 Months
Return Length of Arguments Passed
Swap Nodes in Pairs
Create Hello World Function6 Months
First Bad Version6 Months
Find Eventual Safe States3 Months
Recover Binary Search Tree
Find the Maximum Length of Valid Subsequence II
Remove Duplicates from Sorted Array II3 Months
Shortest Distance to Target String in a Circular Array
Reordered Power of 2
Max Chunks To Make Sorted II
Peak Index in a Mountain Array3 Months
Ransom Note
Partition Array According to Given Pivot6 Months
Running Sum of 1d Array6 Months
K Radius Subarray Averages
Longest Uncommon Subsequence II
Count Hills and Valleys in an Array
Check if All A's Appears Before All B's
Counting Bits
Guess Number Higher or Lower
Maximum Nesting Depth of the Parentheses3 Months
Merge Two 2D Arrays by Summing Values
Unique Length-3 Palindromic Subsequences
Minimum Number of Changes to Make Binary String Beautiful
Friend Requests II: Who Has the Most Friends6 Months
Find the Original Typed String I
Find Words Containing Character
Rotate List3 Months
Largest Divisible Subset
Find Pivot Index
Employees Earning More Than Their Managers6 Months
Perfect Number6 Months
Online Election6 Months
Customers Who Never Order6 Months
Boats to Save People
Accounts Merge6 Months
Find if Path Exists in Graph3 Months
Valid Triangle Number30 Days
Split Linked List in Parts
Binary Tree Inorder Traversal3 Months
24 Game
Simple Bank System6 Months
Number of Operations to Make Network Connected
Factorial Trailing Zeroes
Remove Outermost Parentheses
To Be Or Not To Be
Max Dot Product of Two Subsequences
The kth Factor of n
Maximum Frequency of an Element After Performing Operations II6 Months
Super Pow
Sum of Prefix Scores of Strings
Find the Difference of Two Arrays
Map of Highest Peak
Max Sum of Rectangle No Larger Than K
Find the Minimum and Maximum Number of Nodes Between Critical Points
Strange Printer
Stone Game II
Tiling a Rectangle with the Fewest Squares
Valid Square
Rank Scores
Minimum Depth of Binary Tree
Game Play Analysis I
Balance a Binary Search Tree3 Months
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Maximum Average Pass Ratio
Different Ways to Add Parentheses
Max Consecutive Ones II
Richest Customer Wealth
Longest Substring with At Least K Repeating Characters6 Months
Single Number3 Months
Counter
Lexicographically Minimum String After Removing Stars
Evaluate Reverse Polish Notation6 Months
Minimum Pair Removal to Sort Array I
Count Special Subsequences
Set Mismatch6 Months
Ones and Zeroes6 Months
Maximum Unique Subarray Sum After Deletion
Delete Columns to Make Sorted II6 Months
Third Maximum Number
Beautiful Arrangement II
Employee Free Time
Range Sum Query 2D - Mutable6 Months
Minimum Swaps to Group All 1's Together II
Binary Tree Vertical Order Traversal6 Months
Maximum Difference Between Even and Odd Frequency II
Count Complete Tree Nodes
Number of Enclaves
Number of Equivalent Domino Pairs
My Calendar III
Serialize and Deserialize N-ary Tree
Shortest Subarray to be Removed to Make Array Sorted
Power of Three
Minimum Cost to Cut a Stick
Range Sum of Sorted Subarray Sums
Maximum Number of Accepted Invitations
Score of a String
Maximum Width of Binary Tree
Not Boring Movies
Minimum Array Sum
Maximum Number of Events That Can Be Attended II
Minimum Difference in Sums After Removal of Elements
Linked List Cycle6 Months
Hand of Straights
Implement Rand10() Using Rand7()
Longest Binary Subsequence Less Than or Equal to K
Minimum Number of Operations to Move All Balls to Each Box
Maximum Subsequence Score
Binary Tree Preorder Traversal
Longest Palindrome
Type of Triangle
Binary Subarrays With Sum
Spiral Matrix III
Number of Steps to Reduce a Number to Zero6 Months
Flipping an Image
Find Common Elements Between Two Arrays
Closest Binary Search Tree Value
Predict the Winner
Most Stones Removed with Same Row or Column6 Months
Pascal's Triangle II
Repeated Substring Pattern
Rearranging Fruits
Sort Integers by The Power Value30 Days
Count Negative Numbers in a Sorted Matrix6 Months
Partition Labels
DI String Match
Find Minimum Operations to Make All Elements Divisible by Three6 Months
Student Attendance Record I
Sum of Subarray Ranges
H-Index6 Months
Find the Maximum Achievable Number
Amount of Time for Binary Tree to Be Infected
Meeting Rooms
Construct Binary Tree from Preorder and Inorder Traversal3 Months
Check if Grid can be Cut into Sections
Row With Maximum Ones
Employees Whose Manager Left the Company
Minimum Moves to Reach Target in Grid
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Minimum Falling Path Sum II
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Shortest String That Contains Three Strings
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