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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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1173
Difference Between Element Sum and Digit Sum of an Array
Easy
Jump Game II6 Months
Medium
Second Highest Salary6 Months
Medium
Best Sightseeing Pair
Medium
Max Difference You Can Get From Changing an Integer
Medium
Find a Peak Element II
Medium
Walking Robot Simulation
Medium
Special Array II
Medium
Maximum Alternating Subsequence Sum
Medium
Find Followers Count
Easy
Minimum Index Sum of Two Lists
Easy
Longest Univalue Path
Medium
Reverse Prefix of Word
Easy
Minimized Maximum of Products Distributed to Any Store
Medium
Determine if Two Strings Are Close6 Months
Medium
Minimum Number of Steps to Make Two Strings Anagram3 Months
Medium
Minimum Score of a Path Between Two Cities
Medium
Count Good Triplets
Easy
Convert Sorted List to Binary Search Tree
Medium
Special Array I
Easy
Grumpy Bookstore Owner
Medium
Find Closest Number to Zero
Easy
Asteroid Collision
Medium
Smallest Range Covering Elements from K Lists
Hard
Invalid Tweets
Easy
Monthly Transactions I6 Months
Medium
Majority Element II6 Months
Medium
Find Greatest Common Divisor of Array
Easy
Minimum Genetic Mutation
Medium
Delete Characters to Make Fancy String
Easy
Tree Node
Medium
Avoid Flood in The City6 Months
Medium
Minimum Bit Flips to Convert Number
Easy
Valid Parentheses30 Days
Easy
Min Stack3 Months
Medium
Customer Who Visited but Did Not Make Any Transactions6 Months
Easy
Minimum Penalty for a Shop
Medium
Dota2 Senate
Medium
Alternating Groups II
Medium
Paint House IV
Medium
Subarray Product Less Than K3 Months
Medium
Word Ladder II
Hard
Maximum Tastiness of Candy Basket
Medium
N-Queens II6 Months
Hard
Insert Delete GetRandom O(1) - Duplicates allowed6 Months
Hard
Average Salary Excluding the Minimum and Maximum Salary
Easy
Largest Number After Digit Swaps by Parity
Easy
Kth Smallest Element in a Sorted Matrix
Medium
Open the Lock6 Months
Medium
Find the Length of the Longest Common Prefix
Medium
Permutation Sequence
Hard
K-th Smallest Prime Fraction
Medium
Meeting Rooms II30 Days
Medium
Find the Integer Added to Array I
Easy
Minimum Moves to Convert String
Easy
Longest Nice Subarray
Medium
Design A Leaderboard3 Months
Medium
User Activity for the Past 30 Days I6 Months
Easy
Longest Subarray of 1's After Deleting One Element
Medium
Longest Happy String
Medium
Score After Flipping Matrix
Medium
Number of People Aware of a Secret6 Months
Medium
Furthest Building You Can Reach
Medium
Course Schedule II6 Months
Medium
Binary Gap6 Months
Easy
Non-negative Integers without Consecutive Ones
Hard
Reverse Linked List6 Months
Easy
Design Tic-Tac-Toe
Medium
Minimum Height Trees
Medium
Number of Ways to Divide a Long Corridor
Hard
Largest 3-Same-Digit Number in String
Easy
Check If a Word Occurs As a Prefix of Any Word in a Sentence
Easy
Top K Frequent Words3 Months
Medium
Brick Wall6 Months
Medium
Spiral Matrix3 Months
Medium
Unique Binary Search Trees
Medium
Minimum Deletions to Make String Balanced
Medium
Pacific Atlantic Water Flow
Medium
Shortest Distance from All Buildings
Hard
Letter Case Permutation
Medium
Count Equal and Divisible Pairs in an Array
Easy
Market Analysis I
Medium
Count the Number of Arrays with K Matching Adjacent Elements
Hard
Investments in 2016
Medium
Zigzag Conversion6 Months
Medium
Linked List in Binary Tree
Medium
Find Common Characters
Easy
Find Resultant Array After Removing Anagrams
Easy
Vowel Spellchecker6 Months
Medium
Copy List with Random Pointer6 Months
Medium
Longest String Chain
Medium
Longest Harmonious Subsequence
Easy
Maximum Depth of Binary Tree
Easy
Find Numbers with Even Number of Digits
Easy
Maximum Product of Two Elements in an Array
Easy
The Number of the Smallest Unoccupied Chair
Medium
Find Original Array From Doubled Array
Medium
Substring with Concatenation of All Words
Hard
Construct Quad Tree
Medium
All Nodes Distance K in Binary Tree
Medium
Create Target Array in the Given Order
Easy
Search Suggestions System
Medium
Longest Substring Without Repeating Characters30 Days
Medium
Pow(x, n)3 Months
Medium
Longest Palindromic Substring30 Days
Medium
Baseball Game6 Months
Easy
Pass the Pillow
Easy
Diameter of Binary Tree
Easy
Maximum Distance in Arrays
Medium
Minimum Cost For Tickets
Medium
Partition Array Into Two Arrays to Minimize Sum Difference
Hard
Find Closest Node to Given Two Nodes
Medium
Unique Morse Code Words
Easy
Find Subarrays With Equal Sum
Easy
Matrix Cells in Distance Order
Easy
Time Based Key-Value Store6 Months
Medium
Two City Scheduling30 Days
Medium
Trapping Rain Water3 Months
Hard
Find Beautiful Indices in the Given Array I
Medium
Compare Version Numbers
Medium
Climbing Stairs30 Days
Easy
Design Spreadsheet6 Months
Medium
Invalid Transactions30 Days
Medium
Product of Array Except Self3 Months
Medium
Minimum Number of Days to Make m Bouquets
Medium
Battleships in a Board
Medium
Merge Intervals30 Days
Medium
Count Salary Categories
Medium
Maximum Sum Circular Subarray
Medium
Minimum Cost to Move Chips to The Same Position
Easy
Power of Four
Easy
Generate Parentheses3 Months
Medium
Serialize and Deserialize Binary Tree
Hard
Transpose Matrix
Easy
1-bit and 2-bit Characters6 Months
Easy
Verifying an Alien Dictionary
Easy
Managers with at Least 5 Direct Reports6 Months
Medium
Design HashSet
Easy
Finding Pairs With a Certain Sum
Medium
K Closest Points to Origin
Medium
Count the Number of Consistent Strings
Easy
Maximum Product Subarray30 Days
Medium
Count the Hidden Sequences
Medium
Find K Closest Elements
Medium
Nth Highest Salary6 Months
Medium
The Number of Employees Which Report to Each Employee
Easy
Divide Intervals Into Minimum Number of Groups
Medium
Kth Smallest Element in a BST3 Months
Medium
Clone Graph
Medium
Path Sum III
Medium
Koko Eating Bananas3 Months
Medium
Subtract the Product and Sum of Digits of an Integer
Easy
Movie Rating
Medium
Split Array Largest Sum6 Months
Hard
Next Permutation30 Days
Medium
Next Greater Numerically Balanced Number6 Months
Medium
Binary Tree Paths
Easy
Two Sum IV - Input is a BST6 Months
Easy
Car Pooling
Medium
Number of Visible People in a Queue
Hard
Number of Ways to Form a Target String Given a Dictionary
Hard
Minimum Difference Between Highest and Lowest of K Scores
Easy
Reverse Nodes in Even Length Groups
Medium
Students and Examinations6 Months
Easy
Palindrome Partitioning II
Hard
Count Good Triplets in an Array
Hard
Convert Binary Number in a Linked List to Integer
Easy
Find Winner on a Tic Tac Toe Game
Easy
First Missing Positive6 Months
Hard
Maximum Number of Tasks You Can Assign
Hard
Permutation in String3 Months
Medium
Exchange Seats6 Months
Medium
Maximum Profit in Job Scheduling
Hard
Maximum Palindromes After Operations
Medium
Unique Paths II3 Months
Medium
Maximum Width Ramp
Medium
Minimum Window Substring3 Months
Hard
Daily Temperatures30 Days
Medium
My Calendar I
Medium
Minimum Length of String After Operations
Medium
Find the Prefix Common Array of Two Arrays
Medium
Group the People Given the Group Size They Belong To
Medium
Valid Word
Easy
House Robber III
Medium
Calculate Amount Paid in Taxes
Easy
Task Scheduler
Medium
Check If It Is a Good Array
Hard
Merge Two Binary Trees
Easy
Find All Numbers Disappeared in an Array6 Months
Easy
IPO6 Months
Hard
Max Chunks To Make Sorted
Medium
Find All Anagrams in a String
Medium
Valid Palindrome II3 Months
Easy
Average Time of Process per Machine
Easy
Wildcard Matching3 Months
Hard
Number of 1 Bits
Easy
Count Elements With Maximum Frequency
Easy
Divisor Game
Easy
Rotate Image3 Months
Medium
Basic Calculator II3 Months
Medium
Reverse Bits3 Months
Easy
The Number of Beautiful Subsets
Medium
Random Pick with Weight
Medium
Decoded String at Index
Medium
Maximum Sum BST in Binary Tree
Hard
Valid Sudoku30 Days
Medium
Rabbits in Forest
Medium
Maximum Swap
Medium
Check if All the Integers in a Range Are Covered
Easy
Remove All Occurrences of a Substring
Medium
Capacity To Ship Packages Within D Days6 Months
Medium
Longest Repeating Character Replacement3 Months
Medium
Minimum Number of K Consecutive Bit Flips
Hard
Largest Number6 Months
Medium
Regular Expression Matching6 Months
Hard
Find Words That Can Be Formed by Characters
Easy
Game of Life
Medium
Longest Strictly Increasing or Strictly Decreasing Subarray
Easy
Count Vowel Strings in Ranges
Medium
Middle of the Linked List3 Months
Easy
Sqrt(x)3 Months
Easy
Find the Distance Value Between Two Arrays
Easy
Isomorphic Strings3 Months
Easy
Shortest Bridge
Medium
Valid Number
Hard
Trapping Rain Water II
Hard
Self Crossing6 Months
Hard
Maximal Square
Medium
Combination Sum6 Months
Medium
Reverse Words in a String6 Months
Medium
Find All Possible Recipes from Given Supplies
Medium
Longest Arithmetic Subsequence
Medium
Flower Planting With No Adjacent
Medium
Palindromic Substrings6 Months
Medium
Design Circular Queue
Medium
Number of Islands30 Days
Medium
Longest Common Subsequence6 Months
Medium
Exclusive Time of Functions
Medium
Making A Large Island
Hard
Word Search II6 Months
Hard
Max Sum of a Pair With Equal Sum of Digits
Medium
Longest Valid Parentheses30 Days
Hard
Permutations6 Months
Medium
Interval List Intersections
Medium
Add Binary30 Days
Easy
Count Binary Substrings30 Days
Easy
Roman to Integer30 Days
Easy
Merge Sorted Array30 Days
Easy
Linked List Cycle II6 Months
Medium
Two Sum II - Input Array Is Sorted3 Months
Medium
Partition Array Into Three Parts With Equal Sum
Easy
Toeplitz Matrix
Easy
Set Matrix Zeroes
Medium
Broken Calculator
Medium
Pascal's Triangle6 Months
Easy
Maximum Total Damage With Spell Casting
Medium
Single Number III
Medium
Product of the Last K Numbers
Medium
Shortest Path in Binary Matrix6 Months
Medium
Find Minimum Time to Reach Last Room I
Medium
Restore IP Addresses
Medium
Sliding Window Median
Hard
Container With Most Water30 Days
Medium
Fair Candy Swap6 Months
Easy
Course Schedule6 Months
Medium
Count and Say3 Months
Medium
Bus Routes3 Months
Hard
Insert Delete GetRandom O(1)30 Days
Medium
Lemonade Change6 Months
Easy
Longest Common Prefix3 Months
Easy
Max Points on a Line
Hard
Search a 2D Matrix II6 Months
Medium
Restaurant Growth6 Months
Medium
Insert Interval
Medium
Successful Pairs of Spells and Potions
Medium
Maximum Sum of Distinct Subarrays With Length K
Medium
Minimum Cost Path with Edge Reversals6 Months
Medium
Check if a Parentheses String Can Be Valid
Medium
Logger Rate Limiter
Easy
Valid Perfect Square
Easy
Rank Teams by Votes6 Months
Medium
Height Checker
Easy
Guess the Word6 Months
Hard
Backspace String Compare
Easy
Minimum Number of Refueling Stops
Hard
Search in Rotated Sorted Array3 Months
Medium
Angle Between Hands of a Clock
Medium
Rotting Oranges30 Days
Medium
String Compression
Medium
Find the Index of the First Occurrence in a String3 Months
Easy
Binary Tree Cameras
Hard
Find the Smallest Divisor Given a Threshold
Medium
Basic Calculator
Hard
Snakes and Ladders
Medium
Couples Holding Hands
Hard
Number of Ships in a Rectangle30 Days
Hard
Robot Bounded In Circle
Medium
Non-overlapping Intervals30 Days
Medium
Maximum Number of Vowels in a Substring of Given Length
Medium
Two Sum30 Days
Easy
Minimum Number of Operations to Make Array Continuous
Hard
Last Person to Fit in the Bus
Medium
Heaters
Medium
Excel Sheet Column Number
Easy
Move Zeroes30 Days
Easy
LFU Cache6 Months
Hard
Single Element in a Sorted Array3 Months
Medium
Taking Maximum Energy From the Mystic Dungeon6 Months
Medium
Remove K Digits6 Months
Medium
Minimum Increment to Make Array Unique
Medium
Intersection of Two Linked Lists
Easy
Kth Largest Element in a Stream
Easy
Burst Balloons
Hard
Populating Next Right Pointers in Each Node II6 Months
Medium
Decode String30 Days
Medium
Word Ladder30 Days
Hard
Alice and Bob Playing Flower Game
Medium
Edit Distance3 Months
Medium
Range Sum Query 2D - Immutable
Medium
Squares of a Sorted Array6 Months
Easy
Walls and Gates
Medium
Distribute Coins in Binary Tree
Medium
Count Univalue Subtrees
Medium
Bitwise ORs of Subarrays
Medium
Beautiful Arrangement
Medium
Maximum Subarray3 Months
Medium
Find the Minimum Area to Cover All Ones I
Medium
Contains Duplicate3 Months
Easy
Closest Prime Numbers in Range
Medium
Count Vowel Substrings of a String
Easy
All O`one Data Structure
Hard
LRU Cache30 Days
Medium
Range Product Queries of Powers
Medium
Path With Minimum Effort
Medium
The Skyline Problem6 Months
Hard
Design Underground System30 Days
Medium
Subsets II6 Months
Medium
Make The String Great
Easy
Remove Zero Sum Consecutive Nodes from Linked List
Medium
Palindrome Permutation
Easy
Final Prices With a Special Discount in a Shop
Easy
Concatenation of Array6 Months
Easy
Merge Two Sorted Lists3 Months
Easy
Subarrays with K Different Integers6 Months
Hard
Reconstruct Itinerary
Hard
Implement Stack using Queues
Easy
Add to Array-Form of Integer
Easy
Count Square Sum Triples6 Months
Easy
Jump Game3 Months
Medium
Maximum Candies You Can Get from Boxes
Hard
Best Time to Buy and Sell Stock30 Days
Easy
Lowest Common Ancestor of a Binary Tree6 Months
Medium
Largest Local Values in a Matrix
Easy
Monotonic Array
Easy
All Paths From Source to Target3 Months
Medium
Count Unhappy Friends3 Months
Medium
Same Tree3 Months
Easy
Construct K Palindrome Strings
Medium
Dungeon Game
Hard
Find All Duplicates in an Array6 Months
Medium
Top K Frequent Elements30 Days
Medium
Multiply Strings6 Months
Medium
Combine Two Tables30 Days
Easy
Number of Matching Subsequences
Medium
Flood Fill
Easy
Regions Cut By Slashes
Medium
Minimum Remove to Make Valid Parentheses30 Days
Medium
Fibonacci Number6 Months
Easy
Average Selling Price
Easy
Palindrome Partitioning6 Months
Medium
Minimum Path Sum6 Months
Medium
Decode Ways6 Months
Medium
Valid Anagram30 Days
Easy
Super Egg Drop6 Months
Hard
Maximum Score From Removing Substrings
Medium
Reverse String6 Months
Easy
Number of Students Unable to Eat Lunch6 Months
Easy
Minimum Cost Tree From Leaf Values
Medium
Sum of Two Integers
Medium
Minimum Cuts to Divide a Circle
Easy
Median of Two Sorted Arrays30 Days
Hard
Design Hit Counter3 Months
Medium
Recyclable and Low Fat Products3 Months
Easy
Construct Binary Tree from String
Medium
Number of Digit One6 Months
Hard
Sum of Square Numbers
Medium
Valid Palindrome3 Months
Easy
Online Stock Span6 Months
Medium
Critical Connections in a Network
Hard
N-Queens3 Months
Hard
Immediate Food Delivery II
Medium
Replace Words
Medium
Symmetric Tree6 Months
Easy
Largest Rectangle in Histogram3 Months
Hard
Student Attendance Record II
Hard
Number of Recent Calls6 Months
Easy
Make Sum Divisible by P
Medium
Greatest Common Divisor of Strings
Easy
Majority Element30 Days
Easy
Binary Tree Right Side View6 Months
Medium
Minimum Operations to Make Binary Array Elements Equal to One I
Medium
Score of Parentheses
Medium
3Sum30 Days
Medium
Number of Perfect Pairs
Medium
Remove All Adjacent Duplicates in String II30 Days
Medium
Maximum XOR for Each Query
Medium
Letter Combinations of a Phone Number3 Months
Medium
Minimum Absolute Difference6 Months
Easy
Find the Duplicate Number3 Months
Medium
Word Search30 Days
Medium
Remove Linked List Elements6 Months
Easy
Gas Station6 Months
Medium
Group Anagrams3 Months
Medium
Simplify Path6 Months
Medium
Island Perimeter
Easy
Max Consecutive Ones III30 Days
Medium
Candy Crush
Medium
3Sum Closest3 Months
Medium
Reverse Nodes in k-Group
Hard
Find Users With Valid E-Mails6 Months
Easy
Moving Average from Data Stream
Easy
Remove K-Balanced Substrings
Medium
Subarray Sum Equals K3 Months
Medium
Longest Balanced Subarray I6 Months
Medium
Triangle30 Days
Medium
Delete Node in a BST6 Months
Medium
Rectangle Area
Medium
Binary Tree Maximum Path Sum6 Months
Hard
Maximum Units on a Truck
Easy
Add Two Numbers30 Days
Medium
Maximal Rectangle30 Days
Hard
Integer to Roman3 Months
Medium
Delete Duplicate Folders in System
Hard
Find the Town Judge6 Months
Easy
Palindrome Number3 Months
Easy
Diagonal Traverse6 Months
Medium
Merge k Sorted Lists30 Days
Hard
Partition Equal Subset Sum3 Months
Medium
Network Delay Time
Medium
The Maze
Medium
Evaluate Division30 Days
Medium
Consecutive Numbers6 Months
Medium
Contiguous Array
Medium
Permutations II3 Months
Medium
Rotate Array6 Months
Medium
Find the City With the Smallest Number of Neighbors at a Threshold Distance
Medium
Best Time to Buy and Sell Stock II6 Months
Medium
Shortest Palindrome
Hard
Divide Array Into Arrays With Max Difference
Medium
Implement Trie (Prefix Tree)3 Months
Medium
Design Add and Search Words Data Structure6 Months
Medium
Construct Binary Tree from Inorder and Postorder Traversal
Medium
Word Break II30 Days
Hard
Trips and Users
Hard
Find Duplicate Subtrees
Medium
Minimum One Bit Operations to Make Integers Zero6 Months
Hard
Sum of Subarray Minimums6 Months
Medium
Reorder List3 Months
Medium
Maximum Repeating Substring
Easy
Sort Colors3 Months
Medium
Distinct Subsequences3 Months
Hard
Sentence Similarity III
Medium
Reverse Vowels of a String30 Days
Easy
Find Bottom Left Tree Value
Medium
Palindrome Linked List30 Days
Easy
Target Sum
Medium
Minimum Common Value
Easy
House Robber6 Months
Medium
The k-th Lexicographical String of All Happy Strings of Length n
Medium
Ugly Number
Easy
Longest Duplicate Substring
Hard
Validate Binary Search Tree3 Months
Medium
Add Digits
Easy
Arranging Coins3 Months
Easy
Number of Ways to Split Array
Medium
Find Lucky Integer in an Array
Easy
Coin Change II6 Months
Medium
Find the Highest Altitude
Easy
Minimum Interval to Include Each Query
Hard
Unique Paths6 Months
Medium
Reverse Substrings Between Each Pair of Parentheses
Medium
Next Greater Node In Linked List6 Months
Medium
Soup Servings
Medium
Degree of an Array
Easy
Longest Continuous Increasing Subsequence
Easy
Balanced Binary Tree3 Months
Easy
Defanging an IP Address6 Months
Easy
Kill Process
Medium
Sort Characters By Frequency6 Months
Medium
N-th Tribonacci Number
Easy
Best Time to Buy and Sell Stock III
Hard
Count Number of Nice Subarrays6 Months
Medium
Next Greater Element III
Medium
Remove Letter To Equalize Frequency3 Months
Easy
Sum Root to Leaf Numbers
Medium
Length of Last Word6 Months
Easy
Design Linked List
Medium
Range Sum of BST
Easy
Largest Triangle Area6 Months
Easy
Smallest Subtree with all the Deepest Nodes6 Months
Medium
Minimum Time Difference
Medium
Minimum Obstacle Removal to Reach Corner
Hard
Word Subsets
Medium
Lowest Common Ancestor of a Binary Search Tree
Medium
Best Time to Buy and Sell Stock with Cooldown
Medium
Lowest Common Ancestor of Deepest Leaves
Medium
Largest Number At Least Twice of Others
Easy
Convert Sorted Array to Binary Search Tree
Easy
Number of Closed Islands
Medium
Contains Duplicate II3 Months
Easy
Remove Duplicate Letters
Medium
4Sum3 Months
Medium
Project Employees I6 Months
Easy
First Unique Character in a String30 Days
Easy
Plus One30 Days
Easy
Sort List30 Days
Medium
Create a DataFrame from List
Easy
Shortest Unsorted Continuous Subarray
Medium
Populating Next Right Pointers in Each Node30 Days
Medium
Search in Rotated Sorted Array II6 Months
Medium
Vertical Order Traversal of a Binary Tree3 Months
Hard
Add Strings3 Months
Easy
Find the Winner of the Circular Game3 Months
Medium
Meeting Rooms III
Hard
Power of Two6 Months
Easy
Max Consecutive Ones3 Months
Easy
Can Place Flowers6 Months
Easy
Find Center of Star Graph
Easy
Intersection of Two Arrays II
Easy
Long Pressed Name
Easy
Reverse Words in a String III
Easy
Duplicate Emails30 Days
Easy
Time Needed to Buy Tickets
Easy
Article Views I3 Months
Easy
Maximum Points You Can Obtain from Cards
Medium
Minimum Number of Swaps to Make the String Balanced
Medium
Divide Two Integers3 Months
Medium
Happy Number3 Months
Easy
Remove All Adjacent Duplicates In String3 Months
Easy
Integer to English Words
Hard
Find Minimum in Rotated Sorted Array3 Months
Medium
Sudoku Solver3 Months
Hard
Minimum Size Subarray Sum6 Months
Medium
Merge Strings Alternately6 Months
Easy
Word Break30 Days
Medium
Find Missing Observations
Medium
Water Bottles
Easy
Longest Consecutive Sequence3 Months
Medium
Last Stone Weight6 Months
Easy
String to Integer (atoi)3 Months
Medium
Relative Ranks6 Months
Easy
Check if Array Is Sorted and Rotated6 Months
Easy
Combinations
Medium
Reorganize String
Medium
Sliding Window Maximum3 Months
Hard
Find K Pairs with Smallest Sums
Medium
Next Greater Element I3 Months
Easy
Count Pairs Whose Sum is Less than Target
Easy
Max Area of Island6 Months
Medium
Word Pattern6 Months
Easy
Find First and Last Position of Element in Sorted Array3 Months
Medium
Cheapest Flights Within K Stops
Medium
Binary Tree Zigzag Level Order Traversal6 Months
Medium
Add Two Numbers II30 Days
Medium
Sum of Digits of String After Convert
Easy
Fruit Into Baskets6 Months
Medium
Is Subsequence
Easy
Expression Add Operators
Hard
Minimum Falling Path Sum6 Months
Medium
Count Good Numbers6 Months
Medium
Single Number II
Medium
Nearest Exit from Entrance in Maze
Medium
Ugly Number II
Medium
Department Top Three Salaries
Hard
Delete Duplicate Emails
Easy
Product Sales Analysis I
Easy
Implement Queue using Stacks
Easy
Sum of Unique Elements
Easy
Combination Sum II3 Months
Medium
Car Fleet
Medium
Interleaving String
Medium
Candy6 Months
Hard
Maximum Product of Splitted Binary Tree
Medium
Assign Cookies
Easy
Rising Temperature3 Months
Easy
Add Two Integers
Easy
Find Median from Data Stream6 Months
Hard
Divide Array Into Equal Pairs
Easy
Employee Bonus
Easy
Delete and Earn
Medium
Remove Nth Node From End of List6 Months
Medium
Insert into a Binary Search Tree
Medium
Find Peak Element3 Months
Medium
Maximum Product of Three Numbers6 Months
Easy
Rotate String6 Months
Easy
K-diff Pairs in an Array
Medium
Longest Increasing Subsequence3 Months
Medium
Summary Ranges
Easy
Remove Digit From Number to Maximize Result
Easy
Delete the Middle Node of a Linked List
Medium
House Robber II3 Months
Medium
Is Graph Bipartite?
Medium
Remove Duplicates from Sorted Array3 Months
Easy
How Many Numbers Are Smaller Than the Current Number
Easy
Sort Array by Increasing Frequency
Easy
Convert a Number to Hexadecimal
Easy
Relative Sort Array
Easy
Cinema Seat Allocation6 Months
Medium
Smallest String With Swaps
Medium
Odd Even Linked List6 Months
Medium
Count Mentions Per User
Medium
Missing Number30 Days
Easy
Minimum Time to Make Rope Colorful
Medium
Patching Array
Hard
Kth Largest Element in an Array6 Months
Medium
Remove Element30 Days
Easy
Truncate Sentence
Easy
Find Score of an Array After Marking All Elements
Medium
Intersection of Two Arrays6 Months
Easy
Fraction to Recurring Decimal6 Months
Medium
Count Servers that Communicate
Medium
Largest Positive Integer That Exists With Its Negative
Easy
Fizz Buzz
Easy
Maximum Population Year
Easy
Jewels and Stones6 Months
Easy
Subsets3 Months
Medium
Longest Nice Substring
Easy
Reverse Linked List II6 Months
Medium
Champagne Tower30 Days
Medium
Number of Good Pairs
Easy
Minimum Number of Arrows to Burst Balloons
Medium
Number of Substrings Containing All Three Characters
Medium
Reverse Integer3 Months
Medium
Path In Zigzag Labelled Binary Tree
Medium
All Possible Full Binary Trees
Medium
Maximum Length of Repeated Subarray
Medium
Number of Provinces3 Months
Medium
Find Customer Referee
Easy
Unique Paths III
Hard
Replace Non-Coprime Numbers in Array6 Months
Hard
Best Time to Buy and Sell Stock with Transaction Fee
Medium
N-Repeated Element in Size 2N Array
Easy
Coin Change30 Days
Medium
Minimum Number of Removals to Make Mountain Array
Hard
Shuffle the Array
Easy
Spiral Matrix II
Medium
Path Sum II
Medium
Find And Replace in String
Medium
Search Insert Position3 Months
Easy
Matrix Diagonal Sum
Easy
Maximum Number of Events That Can Be Attended
Medium
Continuous Subarray Sum3 Months
Medium
Decrypt String from Alphabet to Integer Mapping
Easy
Next Greater Element II6 Months
Medium
Number of Distinct Islands6 Months
Medium
Flatten Binary Tree to Linked List3 Months
Medium
Delete Node in a Linked List6 Months
Medium
Find Missing and Repeated Values3 Months
Easy
01 Matrix
Medium
Perfect Squares
Medium
Excel Sheet Column Title6 Months
Easy
Sort an Array6 Months
Medium
Cousins in Binary Tree
Easy
Text Justification
Hard
Divide Players Into Teams of Equal Skill
Medium
132 Pattern
Medium
Sum of Beauty of All Substrings
Medium
Design Browser History30 Days
Medium
Find the Longest Substring Containing Vowels in Even Counts
Medium
Shortest Path in a Hidden Grid
Medium
Longest Palindromic Subsequence
Medium
Count Numbers with Unique Digits
Medium
Find N Unique Integers Sum up to Zero
Easy
Scramble String
Hard
Dot Product of Two Sparse Vectors3 Months
Medium
Reverse Pairs6 Months
Hard
Human Traffic of Stadium
Hard
Repeated DNA Sequences6 Months
Medium
Range Sum Query - Immutable6 Months
Easy
Maximum Candies Allocated to K Children
Medium
Maximum Matrix Sum3 Months
Medium
Count the Number of Substrings With Dominant Ones
Medium
Maximum Average Subarray I3 Months
Easy
Sum of Mutated Array Closest to Target6 Months
Medium
Longest Balanced Substring II
Medium
Repeated String Match
Medium
Shortest Subarray with Sum at Least K
Hard
Bulb Switcher
Medium
Number of Good Paths
Hard
Big Countries6 Months
Easy
Continuous Subarrays
Medium
2 Keys Keyboard
Medium
Subarray Sums Divisible by K
Medium
Count Primes6 Months
Medium
Sparse Matrix Multiplication
Medium
Binary Tree Level Order Traversal3 Months
Medium
Custom Sort String
Medium
Game Play Analysis IV
Medium
Letter Tile Possibilities
Medium
Percentage of Users Attended a Contest
Easy
Grid Game
Medium
Remove Duplicates from Sorted List6 Months
Easy
Max Number of K-Sum Pairs
Medium
Memoize
Medium
Design an Ordered Stream30 Days
Easy
Smallest Integer Divisible by K
Medium
Read N Characters Given read4 II - Call Multiple Times
Hard
Integer Break
Medium
Unique Number of Occurrences
Easy
Kth Smallest Product of Two Sorted Arrays
Hard
Sum of Left Leaves
Easy
Kth Missing Positive Number3 Months
Easy
Parsing A Boolean Expression
Hard
Find in Mountain Array3 Months
Hard
Replace Employee ID With The Unique Identifier
Easy
Confirmation Rate6 Months
Medium
Shifting Letters
Medium
Construct Binary Search Tree from Preorder Traversal
Medium
Min Cost Climbing Stairs
Easy
Nim Game
Easy
Search a 2D Matrix3 Months
Medium
Wiggle Sort II3 Months
Medium
Frequency of the Most Frequent Element6 Months
Medium
Design Twitter
Medium
Design Search Autocomplete System3 Months
Hard
Linked List Components
Medium
Put Marbles in Bags
Hard
Shortest Path in a Grid with Obstacles Elimination
Hard
Lexicographical Numbers
Medium
Minimum Add to Make Parentheses Valid
Medium
Clumsy Factorial
Medium
Filling Bookcase Shelves
Medium
Create Maximum Number6 Months
Hard
Find Subsequence of Length K With the Largest Sum
Easy
Find the Lexicographically Largest String From the Box I
Medium
Partition List6 Months
Medium
Valid Parenthesis String
Medium
Maximum Frequency Stack6 Months
Hard
Remove Duplicates from Sorted List II6 Months
Medium
House Robber IV
Medium
Contains Duplicate III6 Months
Hard
Primary Department for Each Employee6 Months
Easy
Minimum Operations to Make Array Equal to Target
Hard
Count the Number of Fair Pairs
Medium
Maximum Gap
Medium
Binary Search Tree Iterator
Medium
Invert Binary Tree6 Months
Easy
Combination Sum IV6 Months
Medium
Increasing Triplet Subsequence6 Months
Medium
Maximum Manhattan Distance After K Changes
Medium
Product Price at a Given Date6 Months
Medium
Redundant Connection
Medium
Separate Black and White Balls
Medium
Count of Smaller Numbers After Self6 Months
Hard
Maximum Number of Points From Grid Queries
Hard
Russian Doll Envelopes
Hard
Kids With the Greatest Number of Candies
Easy
Subtree of Another Tree
Easy
Number of Distinct Substrings in a String
Medium
Path Sum6 Months
Easy
Search in a Binary Search Tree
Easy
Surrounded Regions6 Months
Medium
Find the Difference3 Months
Easy
Binary Search3 Months
Easy
Return Length of Arguments Passed
Easy
Swap Nodes in Pairs
Medium
Create Hello World Function6 Months
Easy
First Bad Version6 Months
Easy
Find Eventual Safe States3 Months
Medium
Recover Binary Search Tree
Medium
Find the Maximum Length of Valid Subsequence II
Medium
Remove Duplicates from Sorted Array II3 Months
Medium
Shortest Distance to Target String in a Circular Array
Easy
Reordered Power of 2
Medium
Max Chunks To Make Sorted II
Hard
Peak Index in a Mountain Array3 Months
Medium
Ransom Note
Easy
Partition Array According to Given Pivot6 Months
Medium
Running Sum of 1d Array6 Months
Easy
K Radius Subarray Averages
Medium
Longest Uncommon Subsequence II
Medium
Count Hills and Valleys in an Array
Easy
Check if All A's Appears Before All B's
Easy
Counting Bits
Easy
Guess Number Higher or Lower
Easy
Maximum Nesting Depth of the Parentheses3 Months
Easy
Merge Two 2D Arrays by Summing Values
Easy
Unique Length-3 Palindromic Subsequences
Medium
Minimum Number of Changes to Make Binary String Beautiful
Medium
Friend Requests II: Who Has the Most Friends6 Months
Medium
Find the Original Typed String I
Easy
Find Words Containing Character
Easy
Rotate List3 Months
Medium
Largest Divisible Subset
Medium
Find Pivot Index
Easy
Employees Earning More Than Their Managers6 Months
Easy
Perfect Number6 Months
Easy
Online Election6 Months
Medium
Customers Who Never Order6 Months
Easy
Boats to Save People
Medium
Accounts Merge6 Months
Medium
Find if Path Exists in Graph3 Months
Easy
Valid Triangle Number30 Days
Medium
Split Linked List in Parts
Medium
Binary Tree Inorder Traversal3 Months
Easy
24 Game
Hard
Simple Bank System6 Months
Medium
Number of Operations to Make Network Connected
Medium
Factorial Trailing Zeroes
Medium
Remove Outermost Parentheses
Easy
To Be Or Not To Be
Easy
Max Dot Product of Two Subsequences
Hard
The kth Factor of n
Medium
Maximum Frequency of an Element After Performing Operations II6 Months
Hard
Super Pow
Medium
Sum of Prefix Scores of Strings
Hard
Find the Difference of Two Arrays
Easy
Map of Highest Peak
Medium
Max Sum of Rectangle No Larger Than K
Hard
Find the Minimum and Maximum Number of Nodes Between Critical Points
Medium
Strange Printer
Hard
Stone Game II
Medium
Tiling a Rectangle with the Fewest Squares
Hard
Valid Square
Medium
Rank Scores
Medium
Minimum Depth of Binary Tree
Easy
Game Play Analysis I
Easy
Balance a Binary Search Tree3 Months
Medium
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Medium
Maximum Average Pass Ratio
Medium
Different Ways to Add Parentheses
Medium
Max Consecutive Ones II
Medium
Richest Customer Wealth
Easy
Longest Substring with At Least K Repeating Characters6 Months
Medium
Single Number3 Months
Easy
Counter
Easy
Lexicographically Minimum String After Removing Stars
Medium
Evaluate Reverse Polish Notation6 Months
Medium
Minimum Pair Removal to Sort Array I
Easy
Count Special Subsequences
Medium
Set Mismatch6 Months
Easy
Ones and Zeroes6 Months
Medium
Maximum Unique Subarray Sum After Deletion
Easy
Delete Columns to Make Sorted II6 Months
Medium
Third Maximum Number
Easy
Beautiful Arrangement II
Medium
Employee Free Time
Hard
Range Sum Query 2D - Mutable6 Months
Medium
Minimum Swaps to Group All 1's Together II
Medium
Binary Tree Vertical Order Traversal6 Months
Medium
Maximum Difference Between Even and Odd Frequency II
Hard
Count Complete Tree Nodes
Easy
Number of Enclaves
Medium
Number of Equivalent Domino Pairs
Easy
My Calendar III
Hard
Serialize and Deserialize N-ary Tree
Hard
Shortest Subarray to be Removed to Make Array Sorted
Medium
Power of Three
Easy
Minimum Cost to Cut a Stick
Hard
Range Sum of Sorted Subarray Sums
Medium
Maximum Number of Accepted Invitations
Medium
Score of a String
Easy
Maximum Width of Binary Tree
Medium
Not Boring Movies
Easy
Minimum Array Sum
Medium
Maximum Number of Events That Can Be Attended II
Hard
Minimum Difference in Sums After Removal of Elements
Hard
Linked List Cycle6 Months
Easy
Hand of Straights
Medium
Implement Rand10() Using Rand7()
Medium
Longest Binary Subsequence Less Than or Equal to K
Medium
Minimum Number of Operations to Move All Balls to Each Box
Medium
Maximum Subsequence Score
Medium
Binary Tree Preorder Traversal
Easy
Longest Palindrome
Easy
Type of Triangle
Easy
Binary Subarrays With Sum
Medium
Spiral Matrix III
Medium
Number of Steps to Reduce a Number to Zero6 Months
Easy
Flipping an Image
Easy
Find Common Elements Between Two Arrays
Easy
Closest Binary Search Tree Value
Easy
Predict the Winner
Medium
Most Stones Removed with Same Row or Column6 Months
Medium
Pascal's Triangle II
Easy
Repeated Substring Pattern
Easy
Rearranging Fruits
Hard
Sort Integers by The Power Value30 Days
Medium
Count Negative Numbers in a Sorted Matrix6 Months
Easy
Partition Labels
Medium
DI String Match
Easy
Find Minimum Operations to Make All Elements Divisible by Three6 Months
Easy
Student Attendance Record I
Easy
Sum of Subarray Ranges
Medium
H-Index6 Months
Medium
Find the Maximum Achievable Number
Easy
Amount of Time for Binary Tree to Be Infected
Medium
Meeting Rooms
Easy
Construct Binary Tree from Preorder and Inorder Traversal3 Months
Medium
Check if Grid can be Cut into Sections
Medium
Row With Maximum Ones
Easy
Employees Whose Manager Left the Company
Easy
Minimum Moves to Reach Target in Grid
Hard
Construct the Minimum Bitwise Array I6 Months
Easy
Circular Array Loop
Medium
N-ary Tree Postorder Traversal
Easy
String Matching in an Array
Easy
Generate Fibonacci Sequence
Easy
Remove Nodes From Linked List
Medium
Gray Code
Medium
First Completely Painted Row or Column
Medium
Elimination Game
Medium
Maximum Sum of Edge Values in a Graph
Hard
Stone Game
Medium
Three Consecutive Odds
Easy
Filter Elements from Array6 Months
Easy
Minimum Operations to Convert All Elements to Zero6 Months
Medium
Maximum Value of an Ordered Triplet II
Medium
Complement of Base 10 Integer
Easy
Maximize Subarrays After Removing One Conflicting Pair
Hard
Build Array from Permutation
Easy
Duplicate Zeros
Easy
Count of Substrings Containing Every Vowel and K Consonants II
Medium
Number of Ways to Arrive at Destination
Medium
Minimum Falling Path Sum II
Hard
Maximum and Minimum Sums of at Most Size K Subsequences
Medium
Sort the People
Easy
Find the Original Typed String II
Hard
Fix Names in a Table
Easy
Shortest String That Contains Three Strings
Medium
Minimum Number of Days to Disconnect Island
Hard
Min Max Game
Easy
Reach a Number
Medium
Allocate Mailboxes
Hard
Fruits Into Baskets III
Medium
Count Subarrays Where Max Element Appears at Least K Times
Medium
Count Pairs That Form a Complete Day II
Medium
Customers Who Bought All Products3 Months
Medium
Find Minimum Cost to Remove Array Elements
Medium
Sorting the Sentence
Easy
Flip Columns For Maximum Number of Equal Rows
Medium
Even Odd Tree
Medium
Shortest Path to Get Food
Medium
Take Gifts From the Richest Pile
Easy
Minimize XOR
Medium
Array Partition3 Months
Easy
Sort By
Easy
Maximum Difference Between Node and Ancestor
Medium
Count Special Triplets6 Months
Medium
Find All K-Distant Indices in an Array
Easy
Array Prototype Last
Easy
Maximum Running Time of N Computers
Hard
Nth Magical Number
Hard
Insert Greatest Common Divisors in Linked List
Medium
Left and Right Sum Differences
Easy
Modify Graph Edge Weights
Hard
Rank Transform of an Array
Easy
Biggest Single Number6 Months
Easy
Out of Boundary Paths
Medium
Smallest Even Multiple
Easy
Minimum Number of Operations to Make All Array Elements Equal to 1
Medium
XOR Queries of a Subarray
Medium
Mini Parser
Medium
Find X-Sum of All K-Long Subarrays II
Hard
Sales Analysis III
Easy
GCD of Odd and Even Sums6 Months
Easy
Find the K-th Character in String Game II
Hard
Sort Array By Parity II
Easy
Find the Middle Index in Array
Easy
Most Frequent IDs
Medium
Final Array State After K Multiplication Operations I
Easy
Minimum Moves to Balance Circular Array3 Months
Medium
Add Two Promises
Easy
Patients With a Condition
Easy
Choose K Elements With Maximum Sum
Medium
Minimum Total Distance Traveled
Hard
Maximum Twin Sum of a Linked List
Medium
Convert 1D Array Into 2D Array
Easy
Generate Tag for Video Caption
Easy
Trim a Binary Search Tree
Medium
Find Building Where Alice and Bob Can Meet
Hard
Sales Person
Easy
Zero Array Transformation II
Medium
Most Frequent Subtree Sum
Medium
Push Dominoes
Medium
Find Missing Elements6 Months
Easy
Longest Palindrome by Concatenating Two Letter Words
Medium
Remove Methods From Project
Medium
Final Value of Variable After Performing Operations
Easy
Sort Array By Parity
Easy
Defuse the Bomb6 Months
Easy
Minimize String Length
Easy
Reverse String II
Easy
Find Smallest Letter Greater Than Target6 Months
Easy
Count Partitions with Even Sum Difference
Easy
Minimum Moves to Clean the Classroom
Medium
Reschedule Meetings for Maximum Free Time II
Medium
Find the Maximum Number of Fruits Collected
Hard
Apply Operations to an Array
Easy
Counting Words With a Given Prefix
Easy
Separate Squares I
Medium
Maximum Difference Between Increasing Elements
Easy
Range Sum Query - Mutable
Medium
Minimum Array End
Medium
Maximum XOR of Two Numbers in an Array
Medium
Shortest Distance to a Character
Easy
Minimum Consecutive Cards to Pick Up
Medium
Four Divisors3 Months
Medium
Check Completeness of a Binary Tree
Medium
Sum of Absolute Differences in a Sorted Array
Medium
Special Array With X Elements Greater Than or Equal X
Easy
Total Hamming Distance
Medium
Prime Subtraction Operation
Medium
Longest Happy Prefix
Hard
Magic Squares In Grid3 Months
Medium
Minimum Time Visiting All Points6 Months
Easy
Apple Redistribution into Boxes
Easy
Zero Array Transformation I
Medium
Minimum Number of Operations to Make Array XOR Equal to K
Medium
Check if the Sentence Is Pangram
Easy
Count Submatrices With All Ones
Medium
Find a Safe Walk Through a Grid
Medium
Adjacent Increasing Subarrays Detection I6 Months
Easy
Smallest Subarrays With Maximum Bitwise OR
Medium
Analyze Subscription Conversion
Medium
Minimum Operations to Make Array Values Equal to K
Easy
Count Total Number of Colored Cells
Medium
Number of Ways to Paint N × 3 Grid3 Months
Hard
Find Right Interval
Medium
Count Number of Trapezoids I
Medium
Maximum Square Area by Removing Fences From a Field
Medium
Minimum Operations to Make Array Elements Zero
Hard
Divide an Array Into Subarrays With Minimum Cost I3 Months
Easy
Check if Array is Good
Easy
Find Unique Binary String
Medium
Swap Sex of Employees
Easy
Maximum 69 Number
Easy
Root Equals Sum of Children6 Months
Easy
Triangle Judgement
Easy
Count Number of Bad Pairs
Medium
Largest Odd Number in String
Easy
Minimum Deletions to Make String K-Special
Medium
Make Array Elements Equal to Zero
Easy
Reschedule Meetings for Maximum Free Time I
Medium
Longest Balanced Substring I6 Months
Medium
Maximum Subarray Sum With Length Divisible by K
Medium
Can Make Arithmetic Progression From Sequence6 Months
Easy
Divisible and Non-divisible Sums Difference
Easy
Find the Winning Player in Coin Game
Easy
Find the Punishment Number of an Integer
Medium
Number of Unique Subjects Taught by Each Teacher
Easy
Partition Array for Maximum Sum
Medium
Orderly Queue
Hard
Longest Even Odd Subarray With Threshold
Easy
Is Object Empty
Easy
Hamming Distance
Easy
Maximum Erasure Value
Medium
Binary Watch
Easy
Find the Number of Distinct Colors Among the Balls
Medium
Count of Interesting Subarrays
Medium
Numbers With Same Consecutive Differences
Medium
Count Number of Teams
Medium
Count Largest Group
Easy
Detect Capital
Easy
Find Kth Bit in Nth Binary String
Medium
Unique Binary Search Trees II
Medium
Minimum Number of Operations to Make Elements in Array Distinct
Easy
Find the Largest Area of Square Inside Two Rectangles3 Months
Medium
Length of Longest Fibonacci Subsequence
Medium
Find Mode in Binary Search Tree
Easy
Find the Power of K-Size Subarrays I
Medium
K-th Symbol in Grammar
Medium
Domino and Tromino Tiling
Medium
A Number After a Double Reversal
Easy
Find Closest Person
Easy
Reveal Cards In Increasing Order
Medium
Cat and Mouse
Hard
Count Number of Maximum Bitwise-OR Subsets
Medium
Minimum Limit of Balls in a Bag
Medium
Add One Row to Tree6 Months
Medium
Maximum Number of Operations to Move Ones to the End
Medium
Find Root of N-Ary Tree
Medium
Largest Perimeter Triangle
Easy
Sleep
Easy
The Earliest and Latest Rounds Where Players Compete
Hard
Count Beautiful Splits in an Array
Medium
New 21 Game
Medium
Check If N and Its Double Exist
Easy
Sum of k-Mirror Numbers
Hard
Count Prefix and Suffix Pairs I
Easy
Tuple with Same Product
Medium
Sort the Jumbled Numbers
Medium
Divide a String Into Groups of Size k
Easy
Flatten a Multilevel Doubly Linked List30 Days
Medium
Product Sales Analysis III
Medium
Painting a Grid With Three Different Colors
Hard
Knight Dialer6 Months
Medium
Calculator with Method Chaining
Easy
Sum of All Subset XOR Totals
Easy
Combination Sum III
Medium
Maximum Absolute Sum of Any Subarray
Medium
Adding Spaces to a String
Medium
Last Stone Weight II
Medium
The Dining Philosophers
Medium
Equal Row and Column Pairs
Medium
Count Symmetric Integers
Easy
Check if Number is a Sum of Powers of Three
Medium
Move Pieces to Obtain a String
Medium
Queries Quality and Percentage
Easy
Minimum Number Game
Easy
Number of Sub-arrays With Odd Sum
Medium
Design Task Manager6 Months
Medium
Trionic Array II
Hard
Reshape Data: Melt
Easy
Delete Nodes From Linked List Present in Array
Medium
Delete Operation for Two Strings
Medium
Clear Digits
Easy
Design a Todo List
Medium
Find the Minimum Amount of Time to Brew Potions6 Months
Medium
Check if All Characters Have Equal Number of Occurrences
Easy
Total Distance Traveled
Easy
Reshape Data: Pivot
Easy
Find the Lexicographically Smallest Valid Sequence
Medium
Binary Tree Postorder Traversal
Easy
Find Largest Value in Each Tree Row
Medium
Find X-Sum of All K-Long Subarrays I6 Months
Easy
Arithmetic Slices II - Subsequence
Hard
Make Two Arrays Equal by Reversing Subarrays
Easy
Check If All 1's Are at Least Length K Places Away
Easy
Keep Multiplying Found Values by Two
Easy
Find K-th Smallest Pair Distance
Hard
Minimum Operations to Make the Array Alternating
Medium
Find Maximum Number of Non Intersecting Substrings
Medium
Maximum Sum of 3 Non-Overlapping Subarrays
Hard
Most Frequent Even Element
Easy
Word Frequency
Medium
Jump Game V
Hard
Maximum Number of Points with Cost
Medium
Kth Largest Sum in a Binary Tree
Medium
Stone Game III
Hard
Bitwise AND of Numbers Range
Medium
Lexicographically Smallest Equivalent String
Medium
Maximum Number of Distinct Elements After Operations
Medium
Sort Items by Groups Respecting Dependencies
Hard
Check if Two Chessboard Squares Have the Same Color
Easy
Zero Array Transformation III
Medium
Rearrange Array Elements by Sign3 Months
Medium
Find Longest Special Substring That Occurs Thrice I
Medium
Construct Binary Tree from Preorder and Postorder Traversal
Medium
Maximum Difference Between Adjacent Elements in a Circular Array
Easy
Ways to Express an Integer as Sum of Powers
Medium
Recover a Tree From Preorder Traversal
Hard
Finding 3-Digit Even Numbers
Easy
Robot Return to Origin
Easy
Generate Binary Strings Without Adjacent Zeros
Medium
Consecutive Characters
Easy
Solving Questions With Brainpower
Medium
Find the Student that Will Replace the Chalk
Medium
Minimum Operations to Make the Integer Zero6 Months
Medium
Implement Magic Dictionary3 Months
Medium
Number of Subsequences That Satisfy the Given Sum Condition
Medium
Maximum Score Words Formed by Letters
Hard
Group Sold Products By The Date
Easy
Distribute Candies
Easy
Circular Sentence
Easy
Apply Transform Over Each Element in Array
Easy
Merge BSTs to Create Single BST
Hard
Find the K-th Character in String Game I
Easy
Longest Subarray With Maximum Bitwise AND
Medium
Contain Virus
Hard
Split a String Into the Max Number of Unique Substrings
Medium
Minimum Number of People to Teach
Medium
Take K of Each Character From Left and Right6 Months
Medium