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Google Master DSA Sheet

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

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2217
Find Servers That Handled Most Number of Requests
Non-negative Integers without Consecutive Ones
Available Captures for Rook6 Months
Number of Subarrays With LCM Equal to K
Walking Robot Simulation II
Maximize the Number of Target Nodes After Connecting Trees I
Reverse Linked List30 Days
Univalued Binary Tree
Design Tic-Tac-Toe
Number of Orders in the Backlog3 Months
String Without AAA or BBB
Minimum Height Trees
Largest 3-Same-Digit Number in String
Count the Number of Square-Free Subsets
Check If a Word Occurs As a Prefix of Any Word in a Sentence
Dota2 Senate
Grumpy Bookstore Owner
Minimum Additions to Make Valid String
Alternating Groups II
Subarray Product Less Than K6 Months
Word Ladder II3 Months
N-Queens II6 Months
Knight Probability in Chessboard
Insert Delete GetRandom O(1) - Duplicates allowed6 Months
Inorder Successor in BST
Split the Array
Length of Longest V-Shaped Diagonal Segment
Design A Leaderboard3 Months
Find the Number of Copy Arrays
Right Triangles
Unique Substrings in Wraparound String
Make Array Non-decreasing or Non-increasing
Longest Subarray of 1's After Deleting One Element
Longest Happy String
Score After Flipping Matrix
Number of People Aware of a Secret6 Months
Second Largest Digit in a String
Furthest Building You Can Reach
Minimum Penalty for a Shop3 Months
Swap For Longest Repeated Character Substring
Find Beautiful Indices in the Given Array II
Minimum Moves to Convert String
Maximum Area Rectangle With Point Constraints II
Apply Operations to Make Two Strings Equal
Binary Gap
Maximum White Tiles Covered by a Carpet
Tweet Counts Per Frequency
Viewers Turned Streamers
Restore The Array
Operations on Tree
Most Beautiful Item for Each Query
Day of the Year
User Activity for the Past 30 Days I3 Months
Max Stack
Longest Nice Subarray
Minimum ASCII Delete Sum for Two Strings6 Months
Minimum Number of Operations to Sort a Binary Tree by Level
Minimum Index Sum of Two Lists
Process Tasks Using Servers
Maximum Fruits Harvested After at Most K Steps
Minimum Difficulty of a Job Schedule6 Months
Special Binary String
Maximum Side Length of a Square with Sum Less than or Equal to Threshold3 Months
Minimum Genetic Mutation6 Months
Special Array II
Find a Peak Element II6 Months
Sort Matrix by Diagonals6 Months
Max Difference You Can Get From Changing an Integer
Print Binary Tree
Best Sightseeing Pair
Second Highest Salary3 Months
Fruits Into Baskets II
Find Followers Count
Min Stack30 Days
Valid Parentheses30 Days
Count Number of Ways to Place Houses
Largest Number After Digit Swaps by Parity
Number of Connected Components in an Undirected Graph
Kth Smallest Element in a Sorted Matrix
Open the Lock
Maximize Area of Square Hole in Grid3 Months
Snapshot Array6 Months
Validate IP Address
Find the Length of the Longest Common Prefix
Design HashMap
Asteroid Collision3 Months
Permutation Sequence30 Days
String Compression II
Course Schedule II3 Months
Divide an Array Into Subarrays With Minimum Cost II6 Months
Meeting Rooms II30 Days
Largest Magic Square3 Months
Escape a Large Maze
Shortest Subarray With OR at Least K II
Count Operations to Obtain Zero
Majority Element II3 Months
Best Meeting Point
Minimum Value to Get Positive Step by Step Sum6 Months
Maximum Subarray Sum with One Deletion
Count Unguarded Cells in the Grid6 Months
Minimum Deletions to Make String Balanced30 Days
Rotating the Box
Find the Closest Palindrome
Vowel Spellchecker6 Months
Walking Robot Simulation
Maximum Alternating Subsequence Sum
Alternating Groups I
Watering Plants
Difference Between Element Sum and Digit Sum of an Array3 Months
Shortest Distance from All Buildings
Find Resultant Array After Removing Anagrams6 Months
Flatten 2D Vector
Brick Wall
Count Equal and Divisible Pairs in an Array
Top K Frequent Words3 Months
Design Skiplist
Maximum Area Rectangle With Point Constraints I3 Months
Find the Longest Equal Subarray
Count the Number of Arrays with K Matching Adjacent Elements
Maximum Count of Positive Integer and Negative Integer6 Months
K Inverse Pairs Array
Find Closest Number to Zero
Smallest Range Covering Elements from K Lists
Invalid Tweets3 Months
Monthly Transactions I3 Months
Convert Sorted List to Binary Search Tree6 Months
Delete Characters to Make Fancy String
Tree Node
Avoid Flood in The City6 Months
Maximize the Number of Target Nodes After Connecting Trees II
Find Greatest Common Divisor of Array6 Months
Special Array I
Customer Placing the Largest Number of Orders3 Months
Graph Valid Tree6 Months
Minimum Bit Flips to Convert Number
Customer Who Visited but Did Not Make Any Transactions
Bitwise XOR of All Pairings
Jump Game II3 Months
Linked List in Binary Tree
Minimum Number of Steps to Make Two Strings Anagram
Determine if Two Strings Are Close3 Months
Minimum Score of a Path Between Two Cities
Unique Binary Search Trees
Subrectangle Queries
Spiral Matrix30 Days
Sort Integers by The Number of 1 Bits
Count Good Triplets
Investments in 20163 Months
Minimized Maximum of Products Distributed to Any Store
Top Travellers
Find Common Characters6 Months
Zigzag Conversion30 Days
Reverse Prefix of Word6 Months
Pacific Atlantic Water Flow30 Days
Design Most Recently Used Queue
Letter Case Permutation
Longest Univalue Path
Clone Graph3 Months
Maximum Product Subarray3 Months
Time Based Key-Value Store3 Months
Video Stitching
Battleships in a Board
Transpose Matrix6 Months
Serialize and Deserialize Binary Tree3 Months
Invalid Transactions
Minimum Deletions to Make Character Frequencies Unique
Find Beautiful Indices in the Given Array I6 Months
Two City Scheduling
Minimum Area Rectangle II6 Months
Generate Parentheses30 Days
Distribute Candies Among Children II
Product of Array Except Self30 Days
Non-decreasing Subsequences
Divide Intervals Into Minimum Number of Groups
Design a Stack With Increment Operation3 Months
Remove Sub-Folders from the Filesystem
Sum of Perfect Square Ancestors6 Months
Shopping Offers
Partition Array Into Two Arrays to Minimize Sum Difference3 Months
Path Sum III30 Days
Maximum Xor Product
Alien Dictionary6 Months
Movie Rating
Find Original Array From Doubled Array
The Number of Employees Which Report to Each Employee6 Months
3Sum With Multiplicity
Encode and Decode Strings3 Months
Count Subarrays With Score Less Than K
Design HashSet
Palindrome Pairs
Pow(x, n)3 Months
Longest Substring Without Repeating Characters30 Days
Copy List with Random Pointer3 Months
Maximum Number of Words You Can Type6 Months
Power of Four
All Nodes Distance K in Binary Tree6 Months
Building H2O
Minimum Distance Between BST Nodes
Number of Days Between Two Dates
Longest Palindromic Substring30 Days
Maximum Students Taking Exam3 Months
Create Target Array in the Given Order
Maximum Distance in Arrays6 Months
1-bit and 2-bit Characters6 Months
Verifying an Alien Dictionary
Managers with at Least 5 Direct Reports6 Months
Subdomain Visit Count3 Months
Describe the Painting
Finding Pairs With a Certain Sum
Pass the Pillow
Number of Same-End Substrings
Bricks Falling When Hit
Closest Subsequence Sum
Baseball Game
Check if Number Has Equal Digit Count and Digit Value
Make the XOR of All Segments Equal to Zero
Count Number of Homogenous Substrings
Count the Number of Consistent Strings
Search Suggestions System6 Months
Minimum Replacements to Sort the Array
Find Minimum Diameter After Merging Two Trees
Count the Number of Powerful Integers
Count Salary Categories
Find the Longest Valid Obstacle Course at Each Position
Longest Harmonious Subsequence
Best Team With No Conflicts
K Closest Points to Origin
Maximum Product of Two Elements in an Array
The Number of the Smallest Unoccupied Chair
Earliest Second to Mark Indices II
Minimum Number of Days to Make m Bouquets3 Months
Next Greater Numerically Balanced Number6 Months
Subtract the Product and Sum of Digits of an Integer
Peeking Iterator
Trapping Rain Water30 Days
Compare Version Numbers6 Months
Maximize Distance to Closest Person
Climbing Stairs30 Days
Two Sum IV - Input is a BST3 Months
Car Pooling3 Months
Design Spreadsheet6 Months
Binary Tree Paths6 Months
Find K Closest Elements3 Months
Binary Number with Alternating Bits30 Days
Nth Highest Salary3 Months
Verbal Arithmetic Puzzle
Count the Hidden Sequences
Painting the Walls
Longest String Chain6 Months
Maximum Path Quality of a Graph
Word Abbreviation
Group Shifted Strings30 Days
Find Numbers with Even Number of Digits
Substring with Concatenation of All Words6 Months
Unique Morse Code Words
Maximum Sum Circular Subarray6 Months
Minimum Cost For Tickets
Stone Game IX
Find the K-Beauty of a Number
Longest Subsequence With Decreasing Adjacent Difference
Find Closest Node to Given Two Nodes
Koko Eating Bananas30 Days
Unique Email Addresses6 Months
Kth Smallest Element in a BST3 Months
Optimal Account Balancing3 Months
Maximum Depth of Binary Tree6 Months
Subarray With Elements Greater Than Varying Threshold
Next Permutation30 Days
Split Array Largest Sum30 Days
Diameter of Binary Tree3 Months
Construct Quad Tree
Maximum Height by Stacking Cuboids
Merge Intervals30 Days
Basic Calculator III6 Months
Find the Prefix Common Array of Two Arrays
Random Pick with Weight6 Months
Maximum Product After K Increments
Count Sub Islands
Daily Temperatures6 Months
Swap Adjacent in LR String3 Months
Permutation in String3 Months
Swim in Rising Water30 Days
Rabbits in Forest
Parallel Courses III
Maximum Profit in Job Scheduling6 Months
Game of Life
Find the Distance Value Between Two Arrays
Count Vowel Strings in Ranges
Longest Repeating Character Replacement30 Days
Sort Even and Odd Indices Independently6 Months
Maximum Good Subarray Sum
Reverse Bits30 Days
Basic Calculator II30 Days
Exchange Seats6 Months
Maximum Width Ramp6 Months
XOR Operation in an Array6 Months
Throne Inheritance
Count Islands With Total Value Divisible by K
Number of Visible People in a Queue30 Days
Maximum Number of Visible Points
Rotate Image30 Days
The Number of Beautiful Subsets
Average Time of Process per Machine3 Months
Merge Two Binary Trees
Group the People Given the Group Size They Belong To
Maximum Swap
Remove All Occurrences of a Substring6 Months
Make Lexicographically Smallest Array by Swapping Elements
Minimum String Length After Removing Substrings
Find Words That Can Be Formed by Characters
Divisor Game30 Days
Manhattan Distances of All Arrangements of Pieces
Number of Ways to Form a Target String Given a Dictionary
Queue Reconstruction by Height6 Months
Longest Strictly Increasing or Strictly Decreasing Subarray
Valid Palindrome II6 Months
Count Subarrays With Median K
Two Furthest Houses With Different Colors
Find All Anagrams in a String3 Months
House Robber III3 Months
Count Elements With Maximum Frequency
Valid Word
Stock Price Fluctuation
First Missing Positive30 Days
Count Ways To Build Good Strings
Longest Non-decreasing Subarray From Two Arrays
Longest Word in Dictionary
Line Reflection
IPO
Minimum Area Rectangle3 Months
Palindrome Partitioning II6 Months
Reverse Odd Levels of Binary Tree
Remove Boxes6 Months
Maximum Sum BST in Binary Tree3 Months
Longest Increasing Path in a Matrix6 Months
Smallest Substring With Identical Characters I
Design Excel Sum Formula
Number of Valid Move Combinations On Chessboard
Checking Existence of Edge Length Limited Paths II
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts6 Months
Shortest Way to Form String
Minimum Window Substring30 Days
Sqrt(x)3 Months
IP to CIDR6 Months
Check If It Is a Good Array
Largest Number30 Days
Airplane Seat Assignment Probability
Minimum Difference Between Highest and Lowest of K Scores3 Months
Find All Numbers Disappeared in an Array30 Days
Unique Paths II
Students and Examinations6 Months
Maximum Number of Tasks You Can Assign
Convert Binary Number in a Linked List to Integer
My Calendar I6 Months
Make Array Empty
Binary Tree Upside Down
Middle of the Linked List3 Months
Max Increase to Keep City Skyline30 Days
Max Chunks To Make Sorted
String Transformation
Minimum Knight Moves
Find Winner on a Tic Tac Toe Game
Wildcard Matching30 Days
Count Paths That Can Form a Palindrome in a Tree
Analyze User Website Visit Pattern
Regular Expression Matching30 Days
Capacity To Ship Packages Within D Days3 Months
Brace Expansion
Task Scheduler6 Months
Count Good Triplets in an Array
Valid Sudoku6 Months
Maximize Subarray Sum After Removing All Occurrences of One Element
Frog Position After T Seconds
Number of 1 Bits6 Months
Minimum Number of K Consecutive Bit Flips
Paint House III
Find the Minimum Area to Cover All Ones II
Number of Ways to Build Sturdy Brick Wall
Insert Delete GetRandom O(1)3 Months
Lemonade Change
Escape the Spreading Fire
Walls and Gates
Check if a Parentheses String Can Be Valid
Basic Calculator30 Days
Maximum Sum of Distinct Subarrays With Length K6 Months
Max Points on a Line6 Months
Guess Number Higher or Lower II
Successful Pairs of Spells and Potions
Toeplitz Matrix3 Months
Decode String30 Days
Find Valid Matrix Given Row and Column Sums
Bulls and Cows
Sliding Window Median3 Months
Reverse Words in a String3 Months
Snakes and Ladders3 Months
Squares of a Sorted Array30 Days
Cherry Pickup
Last Person to Fit in the Bus6 Months
Satisfiability of Equality Equations
Heaters6 Months
Minimize the Maximum Difference of Pairs
Pascal's Triangle30 Days
Maximum Total Damage With Spell Casting6 Months
Rearrange String k Distance Apart
Bitwise ORs of Subarrays
Single Number III
Power Grid Maintenance6 Months
Rotting Oranges30 Days
Detect Cycles in 2D Grid
String Compression3 Months
All O`one Data Structure
Guess the Word30 Days
Find and Replace Pattern6 Months
Closest Binary Search Tree Value II
Height Checker
Couples Holding Hands
Longest Common Prefix30 Days
Restaurant Growth
Shuffle an Array
Valid Perfect Square6 Months
Count Univalue Subtrees
Find The Original Array of Prefix Xor
Logger Rate Limiter30 Days
Design Circular Queue3 Months
Partition Array Into Three Parts With Equal Sum
Path With Minimum Effort3 Months
Permutations30 Days
Divide Array in Sets of K Consecutive Numbers3 Months
Partition to K Equal Sum Subsets3 Months
Sort the Matrix Diagonally
Find All Possible Recipes from Given Supplies3 Months
Maximum Value at a Given Index in a Bounded Array
Minimum Adjacent Swaps for K Consecutive Ones
Evaluate the Bracket Pairs of a String
Find Longest Special Substring That Occurs Thrice II
Reconstruct Original Digits from English
Minimize Hamming Distance After Swap Operations
Isomorphic Strings30 Days
Reaching Points
Find the Minimum Area to Cover All Ones I
Trapping Rain Water II30 Days
Minimum Number of Operations to Make Array Continuous6 Months
Move Zeroes30 Days
Excel Sheet Column Number6 Months
Minimize Maximum Component Cost
Making A Large Island3 Months
Count the Digits That Divide a Number
Sum of Beautiful Subsequences
Escape The Ghosts
Stamping the Grid
Remove K Digits3 Months
Add Binary30 Days
Collect Coins in a Tree
Merge Sorted Array30 Days
Minimum Operations to Make Character Frequencies Equal
Linked List Cycle II3 Months
Design an ATM Machine
Taking Maximum Energy From the Mystic Dungeon6 Months
Longest Common Subsequence30 Days
Shortest Path in Binary Matrix6 Months
Closest Prime Numbers in Range
Find Minimum Time to Reach Last Room I
Rank Teams by Votes
Minimum Edge Reversals So Every Node Is Reachable
Ways to Split Array Into Three Subarrays
Roman to Integer30 Days
Range Sum Query 2D - Immutable3 Months
Minimum Sideway Jumps
Frog Jump
Intersection of Two Linked Lists30 Days
Burst Balloons3 Months
Find Valid Pair of Adjacent Digits in String
Combination Sum3 Months
Container With Most Water30 Days
Sort Transformed Array30 Days
Populating Next Right Pointers in Each Node II
Department Highest Salary6 Months
Chalkboard XOR Game
Bus Routes30 Days
Maximum Number of Vowels in a Substring of Given Length
Design Snake Game
Set Matrix Zeroes3 Months
Broken Calculator
Non-overlapping Intervals3 Months
Fair Candy Swap
Rectangle Overlap
Longest Valid Parentheses30 Days
Web Crawler Multithreaded
Fraction Addition and Subtraction
Count Vowel Substrings of a String6 Months
LRU Cache30 Days
Robot Bounded In Circle
Minimum Equal Sum of Two Arrays After Replacing Zeros
Minimum Absolute Difference Between Elements With Constraint
Kth Largest Element in a Stream30 Days
Word Search II6 Months
Minimum Time to Collect All Apples in a Tree
LFU Cache6 Months
Palindromic Substrings
Time Needed to Rearrange a Binary String
Distribute Coins in Binary Tree
Maximum Ascending Subarray Sum
Exclusive Time of Functions3 Months
Alice and Bob Playing Flower Game3 Months
Max Sum of a Pair With Equal Sum of Digits
Count Subarrays With Fixed Bounds
As Far from Land as Possible6 Months
Number of Islands30 Days
Split a String in Balanced Strings
Maximal Square3 Months
Insert Interval30 Days
Edit Distance30 Days
Binary Tree Cameras
Restore IP Addresses
Find the Smallest Divisor Given a Threshold30 Days
Course Schedule30 Days
Search a 2D Matrix II6 Months
Single Element in a Sorted Array30 Days
Longest Arithmetic Subsequence3 Months
Serialize and Deserialize BST
The Skyline Problem3 Months
Shifting Letters II
Count the Number of Inversions
Interval List Intersections3 Months
Shortest Bridge3 Months
Minimum Cost Path with Edge Reversals
Average Waiting Time
Search in Rotated Sorted Array30 Days
Range Product Queries of Powers
Backspace String Compare3 Months
Minimum Number of Refueling Stops3 Months
Find the Index of the First Occurrence in a String30 Days
Contains Duplicate30 Days
Two Sum II - Input Array Is Sorted30 Days
Product of the Last K Numbers
Count and Say3 Months
Word Ladder30 Days
Count Square Submatrices with All Ones3 Months
Divide Nodes Into the Maximum Number of Groups
Count Binary Substrings30 Days
Valid Number
Count Complete Subarrays in an Array
Minimum Increment to Make Array Unique
Design Parking System3 Months
Beautiful Arrangement
Maximum Subarray30 Days
Two Sum30 Days
Design In-Memory File System
Split Array into Consecutive Subsequences
Maximum Repeating Substring
Maximal Rectangle3 Months
Contiguous Array3 Months
Remove Invalid Parentheses6 Months
Count Square Sum Triples3 Months
Jump Game30 Days
Word Search3 Months
Best Time to Buy and Sell Stock II3 Months
Delete Duplicate Folders in System
Divide Array Into Arrays With Max Difference
Count Unreachable Pairs of Nodes in an Undirected Graph
Monotonic Array3 Months
Flatten Deeply Nested Array
Design Underground System
Sum of Subarray Minimums3 Months
Check If Array Pairs Are Divisible by k
Minimum Cost Path with Teleportations30 Days
Find Duplicate Subtrees6 Months
Rotate Array30 Days
Reverse String3 Months
Merge k Sorted Lists3 Months
Pairs of Songs With Total Durations Divisible by 60
Top K Frequent Elements30 Days
Find All Duplicates in an Array30 Days
Reorder List3 Months
Diagonal Traverse3 Months
Sum of All Odd Length Subarrays
Construct Binary Tree from Inorder and Postorder Traversal
Sum of Digit Differences of All Pairs
Maximize Amount After Two Days of Conversions
Partition Equal Subset Sum6 Months
Minimum Cost to Connect Sticks
Best Time to Buy and Sell Stock30 Days
3Sum Closest30 Days
Shortest Palindrome3 Months
Longest Balanced Subarray I30 Days
Lowest Common Ancestor of a Binary Tree3 Months
Delete Node in a BST3 Months
Make Sum Divisible by P6 Months
Minimum Absolute Difference30 Days
Rectangle Area3 Months
Longest Substring with At Most K Distinct Characters
HTML Entity Parser
Combine Two Tables30 Days
Binary Tree Right Side View6 Months
Remove Linked List Elements6 Months
Remove All Adjacent Duplicates in String II
Minimum One Bit Operations to Make Integers Zero
Moving Average from Data Stream
Replace Elements with Greatest Element on Right Side6 Months
Island Perimeter
Dungeon Game
The Maze
Add Two Numbers30 Days
Group Anagrams30 Days
UTF-8 Validation
Evaluate Division3 Months
Odd Even Jump
Missing Ranges
Binary Tree Maximum Path Sum30 Days
Maximum Subarray Min-Product
Median of Two Sorted Arrays30 Days
Find the City With the Smallest Number of Neighbors at a Threshold Distance
Subarray Sum Equals K30 Days
Shortest Word Distance II
Find the Town Judge
Triangle6 Months
Matrix Block Sum
Implement Trie (Prefix Tree)
Majority Element30 Days
Minimum Number of Flips to Make the Binary String Alternating
Number of Good Leaf Nodes Pairs
Design Log Storage System
Encode and Decode TinyURL
Finding MK Average
Word Break II3 Months
Race Car6 Months
Longest Cycle in a Graph
Leaf-Similar Trees6 Months
Candy Crush
Multiply Strings3 Months
Max Consecutive Ones III30 Days
Minimum Time to Complete Trips
Find Users With Valid E-Mails
Put Boxes Into the Warehouse I
Create Binary Tree From Descriptions
Simplify Path30 Days
Put Boxes Into the Warehouse II
Integer to Roman3 Months
Valid Palindrome30 Days
Palindrome Number30 Days
Sort Colors30 Days
Minimum Number of Operations to Make Word K-Periodic
Erect the Fence
Sentence Similarity II
Employee Importance6 Months
Lucky Numbers in a Matrix
Find Minimum Time to Finish All Jobs
Recyclable and Low Fat Products30 Days
Symmetric Tree6 Months
Design Hit Counter3 Months
Maximum Units on a Truck6 Months
Greatest Common Divisor of Strings30 Days
Find the Duplicate Number3 Months
Find Minimum Time to Reach Last Room II
Minimum Operations to Make Binary Array Elements Equal to One I
N-Queens30 Days
Concatenation of Array30 Days
Random Pick with Blacklist
Same Tree30 Days
Network Delay Time30 Days
Remove Zero Sum Consecutive Nodes from Linked List
Minimum Score Triangulation of Polygon6 Months
Palindrome Permutation
Maximum Score From Removing Substrings
Replace Words
Implement Stack using Queues6 Months
Sum of Two Integers3 Months
Final Prices With a Special Discount in a Shop
Apply Operations to Maximize Frequency Score
Number of Students Unable to Eat Lunch6 Months
Minimum Cost Tree From Leaf Values
Linked List Random Node6 Months
Maximum Candies You Can Get from Boxes
Minimum Operations to Exceed Threshold Value II
Immediate Food Delivery II6 Months
Find Duplicate File in System
Binary Search Tree to Greater Sum Tree
Consecutive Numbers6 Months
Design Add and Search Words Data Structure
Sum of Square Numbers6 Months
All Ancestors of a Node in a Directed Acyclic Graph6 Months
Largest Rectangle in Histogram30 Days
Decode the Message
Zigzag Grid Traversal With Skip
Parallel Courses
Letter Combinations of a Phone Number3 Months
Number of Recent Calls3 Months
Trips and Users3 Months
Student Attendance Record II
Longest Substring with At Most Two Distinct Characters
Super Egg Drop
Shortest Common Supersequence
Remove Max Number of Edges to Keep Graph Fully Traversable
Reconstruct Itinerary
Merge Two Sorted Lists3 Months
Number of Matching Subsequences6 Months
Minimum Path Sum6 Months
Robot Collisions
Construct K Palindrome Strings
Course Schedule IV
Count Days Without Meetings
Palindrome Partitioning3 Months
The Maze II
Average Selling Price3 Months
Minimum Cuts to Divide a Circle
Critical Connections in a Network6 Months
Minimum Time to Complete All Tasks
Gas Station30 Days
Valid Anagram30 Days
All Paths From Source to Target
Number of Digit One3 Months
Fibonacci Number30 Days
3Sum30 Days
Largest Local Values in a Matrix
Diagonal Traverse II
Add to Array-Form of Integer6 Months
Permutations II3 Months
Find the K-Sum of an Array
Decode Ways6 Months
Subsets II30 Days
Make The String Great
Delete Nodes And Return Forest
Subarrays with K Different Integers3 Months
Minimum Remove to Make Valid Parentheses
Minimum Operations to Reduce X to Zero
Find the Number of Ways to Place People II3 Months
Regions Cut By Slashes
Validate Stack Sequences
Online Stock Span3 Months
Reverse Nodes in k-Group3 Months
Maximum Length of Pair Chain
Score of Parentheses
Flood Fill30 Days
Uncrossed Lines
Unique Paths III30 Days
Reorganize String3 Months
Reverse Linked List II30 Days
Android Unlock Patterns3 Months
Reverse Pairs6 Months
Find K Pairs with Smallest Sums6 Months
4 Keys Keyboard
Rising Temperature3 Months
Best Time to Buy and Sell Stock with Transaction Fee30 Days
Minimum Number of Arrows to Burst Balloons6 Months
Minimum Number of Removals to Make Mountain Array
Sliding Window Maximum30 Days
N-Repeated Element in Size 2N Array3 Months
Maximum Length of Repeated Subarray6 Months
All Possible Full Binary Trees
Print in Order
Number of Provinces6 Months
Minimum Number of Swaps to Make the String Balanced
Time Needed to Buy Tickets3 Months
Path Sum II3 Months
The Earliest Moment When Everyone Become Friends3 Months
Water Bottles6 Months
The Number of Weak Characters in the Game
Lexicographically Smallest Beautiful String
Delete and Earn
Longest Increasing Subsequence30 Days
Remove Element30 Days
Maximum Product of Three Numbers
Boundary of Binary Tree
Largest Positive Integer That Exists With Its Negative
Kth Largest Element in an Array30 Days
Word Break3 Months
Reverse Vowels of a String3 Months
Remove Nth Node From End of List3 Months
Merge Strings Alternately30 Days
Next Special Palindrome Number6 Months
Find Players With Zero or One Losses6 Months
Find Peak Element30 Days
Minimum Size Subarray Sum30 Days
Assign Cookies3 Months
Integer to English Words6 Months
Divide Two Integers3 Months
Apply Substitutions6 Months
Longest Nice Substring
Reverse Only Letters
Happy Number30 Days
Check if Array Is Sorted and Rotated3 Months
Is Graph Bipartite?6 Months
Find Customer Referee6 Months
String to Integer (atoi)6 Months
Remove All Adjacent Duplicates In String3 Months
Combinations6 Months
Replace Non-Coprime Numbers in Array6 Months
Count Odd Numbers in an Interval Range3 Months
Find Minimum in Rotated Sorted Array3 Months
Last Stone Weight6 Months
Maximum Population Year6 Months
Coin Change3 Months
Sudoku Solver30 Days
Matrix Diagonal Sum6 Months
Longest Consecutive Sequence30 Days
Continuous Subarray Sum6 Months
Remove Digit From Number to Maximize Result
Sum Root to Leaf Numbers6 Months
Summary Ranges3 Months
Length of Last Word30 Days
Design Linked List6 Months
Smallest Subtree with all the Deepest Nodes3 Months
Plus One30 Days
Minimum Time Difference
Lowest Common Ancestor of a Binary Search Tree6 Months
Find the Highest Altitude6 Months
Number of Substrings With Only 1s
Delete the Middle Node of a Linked List6 Months
Minimum Amount of Time to Collect Garbage6 Months
Lowest Common Ancestor of Deepest Leaves6 Months
Tallest Billboard3 Months
House Robber II3 Months
Remove Duplicates from Sorted Array30 Days
Maximum Beauty of an Array After Applying Operation
Add Two Integers3 Months
Minimum Interval to Include Each Query6 Months
Find Median from Data Stream3 Months
Path Crossing
Divide Array Into Equal Pairs
Employee Bonus3 Months
Insert into a Binary Search Tree3 Months
Minimum Time to Finish the Race3 Months
Palindrome Linked List30 Days
Deepest Leaves Sum
Maximum Product of Splitted Binary Tree3 Months
K-diff Pairs in an Array
Balanced Binary Tree3 Months
Defanging an IP Address6 Months
N-th Tribonacci Number3 Months
Height of Binary Tree After Subtree Removal Queries
Is Subsequence3 Months
Car Fleet
Number of Closed Islands6 Months
Sum of Unique Elements
Most Profitable Path in a Tree
Sum of Digits of String After Convert
Implement Queue using Stacks3 Months
Product Sales Analysis I3 Months
Cutting Ribbons
Interleaving String3 Months
Expression Add Operators3 Months
Minimum Falling Path Sum6 Months
Prefix and Suffix Search
Ugly Number II
Nearest Exit from Entrance in Maze
Count Pairs Whose Sum is Less than Target6 Months
Count Good Numbers3 Months
Number of Lines To Write String
3Sum Smaller
Add Two Numbers II
Cheapest Flights Within K Stops3 Months
Add Bold Tag in String
Word Pattern6 Months
Sentence Similarity III
The k-th Lexicographical String of All Happy Strings of Length n
Find Leaves of Binary Tree6 Months
Coin Change II30 Days
Convert a Number to Hexadecimal
Find Lucky Integer in an Array
Relative Ranks6 Months
Ugly Number3 Months
Find Bottom Left Tree Value
How Many Numbers Are Smaller Than the Current Number6 Months
Validate Binary Search Tree3 Months
Valid Word Abbreviation
Basic Calculator IV
Number of Ways to Split Array
Arranging Coins6 Months
Add Digits3 Months
Sort List3 Months
Create a DataFrame from List
Missing Element in Sorted Array
First Unique Character in a String3 Months
Minimum Cost to Equalize Array
Count Pairs That Form a Complete Day I
Shortest Unsorted Continuous Subarray
Populating Next Right Pointers in Each Node3 Months
Find Center of Star Graph
Maximum Points You Can Obtain from Cards6 Months
Minimum Common Value
Find And Replace in String30 Days
Smallest Sufficient Team
Campus Bikes
Vertical Order Traversal of a Binary Tree3 Months
Find Missing Observations
Buddy Strings
Paint Fence
Contains Duplicate II30 Days
Perfect Squares3 Months
Max Consecutive Ones3 Months
Remove Duplicate Letters
4Sum30 Days
Distinct Subsequences3 Months
Goal Parser Interpretation
Check if Word Can Be Placed In Crossword
Project Employees I
Minimum Moves to Spread Stones Over Grid
Add Strings3 Months
Long Pressed Name
Largest Triangle Area6 Months
Reverse Words in a String III
Remove Letter To Equalize Frequency3 Months
Count Number of Nice Subarrays
Optimal Partition of String
Best Time to Buy and Sell Stock III3 Months
Number of Submatrices That Sum to Target
Number of Subarrays That Match a Pattern I
Duplicate Emails6 Months
Convert Sorted Array to Binary Search Tree3 Months
Minimum Weighted Subgraph With the Required Paths
Soup Servings
Next Greater Node In Linked List6 Months
Search in Rotated Sorted Array II
Reverse Substrings Between Each Pair of Parentheses
Next Greater Element I3 Months
Minimum Obstacle Removal to Reach Corner
Intersection of Two Arrays II30 Days
Word Subsets
Count Nice Pairs in an Array6 Months
Design a Number Container System
Can Place Flowers3 Months
Best Time to Buy and Sell Stock with Cooldown6 Months
Minimum Cost to Make Array Equal
Flip String to Monotone Increasing6 Months
Power of Two3 Months
Largest Number At Least Twice of Others
Count Good Nodes in Binary Tree6 Months
Meeting Rooms III3 Months
Reorder Routes to Make All Paths Lead to the City Zero
Find the Winner of the Circular Game
Zuma Game6 Months
Split Array With Same Average
Minimum Cost to Make at Least One Valid Path in a Grid6 Months
Rotated Digits
Binary Tree Longest Consecutive Sequence
Exam Room
Dot Product of Two Sparse Vectors
Shuffle the Array30 Days
Reverse Integer30 Days
Longest Duplicate Substring3 Months
Excel Sheet Column Title3 Months
House Robber30 Days
Detonate the Maximum Bombs
Tree Diameter
Number of Longest Increasing Subsequence
Missing Number30 Days
Patching Array
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Champagne Tower30 Days
Shortest Path in a Hidden Grid
Target Sum6 Months
Degree of an Array6 Months
Longest Continuous Increasing Subsequence6 Months
Article Views I3 Months
Count Servers that Communicate
Sum of Beauty of All Substrings6 Months
Scramble String
Find the Longest Substring Containing Vowels in Even Counts
Number of Substrings Containing All Three Characters3 Months
Number of Flowers in Full Bloom
Odd Even Linked List6 Months
Sort Characters By Frequency6 Months
Count the Number of Good Subarrays
Range Sum of BST
Allow One Function Call
132 Pattern6 Months
Minimum Difference Between Largest and Smallest Value in Three Moves
Restore the Array From Adjacent Pairs
Department Top Three Salaries
Find Triangular Sum of an Array
Find Missing and Repeated Values3 Months
Sequence Reconstruction30 Days
Delete Duplicate Emails3 Months
Single Number II3 Months
Jewels and Stones6 Months
Step-By-Step Directions From a Binary Tree Node to Another
Number of Distinct Islands
Subsets30 Days
Max Area of Island3 Months
Consecutive Numbers Sum
Min Cost to Connect All Points6 Months
Number of Atoms
Spiral Matrix II6 Months
Count Different Palindromic Subsequences
Design File System
Find Score of an Array After Marking All Elements
Fruit Into Baskets30 Days
Path with Maximum Gold
Fizz Buzz3 Months
Intersection of Two Arrays3 Months
Minimum Fuel Cost to Report to the Capital
Fraction to Recurring Decimal6 Months
Relative Sort Array
Number of Good Pairs30 Days
Sort an Array3 Months
Water and Jug Problem
Strong Password Checker
Smallest String With Swaps
Length of Longest Subarray With at Most K Frequency
Delete Node in a Linked List3 Months
Flatten Binary Tree to Linked List
Non-decreasing Array
Count Nodes Equal to Average of Subtree
Next Greater Element III
Text Justification3 Months
Count Numbers with Unique Digits
Binary Tree Zigzag Level Order Traversal3 Months
Combination Sum II3 Months
Best Time to Buy and Sell Stock IV
Minimum Insertion Steps to Make a String Palindrome
Minimum Number of Pushes to Type Word I
Minimum Operations to Reduce an Integer to 0
Search Insert Position30 Days
Longest Palindromic Subsequence6 Months
Find First and Last Position of Element in Sorted Array3 Months
Sliding Puzzle
Stickers to Spell Word
Sort Array by Increasing Frequency
Number of Islands II
Function Composition
Design Browser History
Longest Mountain in Array
Maximum Number of Events That Can Be Attended6 Months
Unique Paths30 Days
Time Taken to Cross the Door3 Months
Next Greater Element II3 Months
Candy3 Months
01 Matrix6 Months
Minimum Moves to Equal Array Elements II
Find N Unique Integers Sum up to Zero6 Months
Widest Vertical Area Between Two Points Containing No Points
Keys and Rooms
Cousins in Binary Tree
Rotate String3 Months
Evaluate Reverse Polish Notation3 Months
Implement Rand10() Using Rand7()
Peak Index in a Mountain Array3 Months
Median Employee Salary
Word Squares
Letter Tile Possibilities
Generalized Abbreviation
Count Cells in Overlapping Horizontal and Vertical Substrings
Random Flip Matrix
Maximum Font to Fit a Sentence in a Screen
Minimum Increment Operations to Make Array Beautiful
Primary Department for Each Employee
Longest Word in Dictionary through Deleting
Change the Root of a Binary Tree
Range Sum of Sorted Subarray Sums
Fill a Special Grid
Count Positions on Street With Required Brightness
Maximum Frequency of an Element After Performing Operations II6 Months
Move Sub-Tree of N-Ary Tree
Create Hello World Function30 Days
Watering Plants II
Beautiful Arrangement II
Number of Valid Clock Times
Find Permutation
Increasing Triplet Subsequence6 Months
Expressive Words
Binary Search Tree Iterator6 Months
Maximum Number of Ways to Partition an Array
Number of Good Ways to Split a String
Sum of Prefix Scores of Strings
Design Compressed String Iterator
Loan Types
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Find Kth Largest XOR Coordinate Value
License Key Formatting
Number of Stable Subsequences
Nth Digit6 Months
Maximum Length of Semi-Decreasing Subarrays
Get the Maximum Score
Minimum Cost to Set Cooking Time
Stone Game II
Longest Palindromic Subsequence After at Most K Operations
Rank Scores30 Days
Minimum Depth of Binary Tree
Game Play Analysis I
Balance a Binary Search Tree6 Months
Possible Bipartition
Calculate Compressed Mean
The Most Similar Path in a Graph
Ones and Zeroes6 Months
Count Pairs of Points With Distance k
Sender With Largest Word Count
Find the Most Competitive Subsequence
Longest Binary Subsequence Less Than or Equal to K
Minimum Speed to Arrive on Time
Maximum Subsequence Score
Count Special Subsequences
Binary Tree Level Order Traversal3 Months
Coin Path
Output Contest Matches
Arithmetic Subarrays
Delete Columns to Make Sorted II6 Months
Pizza With 3n Slices
Paths in Maze That Lead to Same Room
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Parallel Courses II
Bomb Enemy
Maximum Score From Removing Stones
Build a Matrix With Conditions
Linked List Components
Linked List Cycle30 Days
Tiling a Rectangle with the Fewest Squares
Flip Game
Sum of Imbalance Numbers of All Subarrays
Check if There is a Path With Equal Number of 0's And 1's
Longest Uploaded Prefix
Distinct Echo Substrings
Max Number of K-Sum Pairs6 Months
Maximum Score of a Good Subarray
Class Performance
Minimum Cost to Change the Final Value of Expression
Extract Kth Character From The Rope Tree
Max Value of Equation
Longest Uncommon Subsequence II
Maximum Number of Accepted Invitations
Check If String Is Transformable With Substring Sort Operations
Binary Tree Longest Consecutive Sequence II
Serialize and Deserialize N-ary Tree6 Months
Minimum Absolute Difference Queries
Closest Dessert Cost
Longest Palindrome3 Months
Bold Words in String
Alphabet Board Path
Design Video Sharing Platform
Minimum Add to Make Parentheses Valid6 Months
Map of Highest Peak
Divide Chocolate
Find the Difference of Two Arrays
Super Pow
Type of Triangle
Shortest Distance to Target Color
Maximum Frequency Stack
Teemo Attacking6 Months
Find the Maximum Sequence Value of Array
Magnetic Force Between Two Balls6 Months
Minesweeper
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Remove Duplicates from Sorted List30 Days
Shuffle String3 Months
Last Moment Before All Ants Fall Out of a Plank
Iterator for Combination
Adjacent Increasing Subarrays Detection II6 Months
Convert Object to JSON String
Minimum Swaps to Group All 1's Together II
Range Sum Query - Immutable3 Months
Partition String
Erect the Fence II
Grid Game
Longest Non-Decreasing Subarray After Replacing at Most One Element30 Days
Number of Ways of Cutting a Pizza
Longest Common Suffix Queries
Count Complete Tree Nodes
K-th Smallest in Lexicographical Order
Recover Binary Search Tree30 Days
Find the Maximum Length of Valid Subsequence II
Maximize Total Cost of Alternating Subarrays
Find Customers With Positive Revenue this Year
The k Strongest Values in an Array
Smallest Subsequence of Distinct Characters
Inverse Coin Change6 Months
Correct a Binary Tree
Minimum Flips in Binary Tree to Get Result
Longest Word With All Prefixes
Cat and Mouse II
Number of Equivalent Domino Pairs3 Months
Minimum Lines to Represent a Line Chart
Fancy Sequence
Max Chunks To Make Sorted II
Remove All Ones With Row and Column Flips
Longest Common Subsequence Between Sorted Arrays
Contains Duplicate III3 Months
Queries on Number of Points Inside a Circle
Guess the Majority in a Hidden Array
Remove Interval
Maximum Average Subarray II
Minimum Distance to Type a Word Using Two Fingers
K Empty Slots
Minimum Number of Operations to Convert Time
Range Sum Query 2D - Mutable
Employee Free Time6 Months
Path with Maximum Probability
Swapping Nodes in a Linked List
Valid Mountain Array6 Months
Maximum Difference Between Even and Odd Frequency II
Kids With the Greatest Number of Candies6 Months
Russian Doll Envelopes30 Days
Path With Maximum Minimum Value6 Months
Count of Smaller Numbers After Self30 Days
Ant on the Boundary
Bulb Switcher3 Months
Create Maximum Number
Product Price at a Given Date3 Months
Minimum Cost to Cut a Stick
My Calendar III
Combination Sum IV6 Months
Minimum Deletions for At Most K Distinct Characters
Invert Binary Tree6 Months
Maximum Gap6 Months
Find Subsequence of Length K With the Largest Sum
Count the Number of Fair Pairs
Binary Tree Preorder Traversal
Zigzag Iterator
Find All People With Secret3 Months
Number of Subarrays with Bounded Maximum
Strobogrammatic Number II
Binary Subarrays With Sum3 Months
Factorial Trailing Zeroes6 Months
Classes With at Least 5 Students
Guess Number Higher or Lower
Number of Steps to Reduce a Number in Binary Representation to One
Matchsticks to Square
Strange Printer
Smallest Missing Integer Greater Than Sequential Prefix Sum6 Months
Merge Two 2D Arrays by Summing Values
Integer Break6 Months
Count Number of Pairs With Absolute Difference K
Plates Between Candles
Construct String With Repeat Limit
Minimum Difference in Sums After Removal of Elements
Threshold Majority Queries
Maximum Width of Binary Tree6 Months
Kth Ancestor of a Tree Node3 Months
Simple Bank System6 Months
Employees Earning More Than Their Managers30 Days
Valid Triangle Number
Power of Three
Find if Path Exists in Graph3 Months
Accounts Merge30 Days
Boats to Save People6 Months
Customers Who Never Order3 Months
Shortest Subarray to be Removed to Make Array Sorted6 Months
Strange Printer II
Counting Bits6 Months
Find the Original Typed String I
Find Pivot Index6 Months
Element Appearing More Than 25% In Sorted Array
Smallest Integer Divisible by K3 Months
Longest Balanced Substring II30 Days
Minimize Malware Spread
Maximum Candies Allocated to K Children
Filling Bookcase Shelves
Two Best Non-Overlapping Events3 Months
Design Search Autocomplete System6 Months
Remove Duplicates from Sorted List II6 Months
Design Twitter6 Months
Confirmation Rate3 Months
Cherry Pickup II
Nim Game3 Months
Binary Tree Coloring Game
Shortest Path to Get All Keys
Count of Range Sum
Search a 2D Matrix30 Days
Counter II6 Months
Keyboard Row
Count Primes6 Months
Minimum Cost to Merge Stones6 Months
Largest Divisible Subset6 Months
String Compression III
Count Palindromic Subsequences
Swap Nodes in Pairs3 Months
Kth Missing Positive Number3 Months
Freedom Trail
Minimum Operations to Make the Array Increasing
Return Length of Arguments Passed6 Months
Maximum Employees to Be Invited to a Meeting
Find the Minimum and Maximum Number of Nodes Between Critical Points
Surrounded Regions3 Months
Search in a Binary Search Tree
Shortest Path in a Grid with Obstacles Elimination6 Months
Maximum Score After Splitting a String
Check if the Rectangle Corner Is Reachable
Minimum Number of Taps to Open to Water a Garden
Different Ways to Add Parentheses
Subtree of Another Tree3 Months
Split Linked List in Parts
Number of Operations to Make Network Connected
Destroying Asteroids
Can I Win6 Months
The kth Factor of n6 Months
Partition Labels
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Sum of Left Leaves
Flipping an Image
Most Stones Removed with Same Row or Column3 Months
Profitable Schemes
Maximum Product of Word Lengths
Hand of Straights
Largest Values From Labels
Game Play Analysis IV3 Months
Percentage of Users Attended a Contest6 Months
Maximum Matrix Sum3 Months
Sum of Distances in Tree6 Months
Unique Number of Occurrences3 Months
Construct Binary Search Tree from Preorder Traversal3 Months
Separate Black and White Balls
Lexicographically Smallest Palindrome
Find Target Indices After Sorting Array6 Months
Parsing A Boolean Expression
Smallest String Starting From Leaf
Find in Mountain Array3 Months
Replace Employee ID With The Unique Identifier3 Months
Shifting Letters
Remove Outermost Parentheses3 Months
Min Cost Climbing Stairs6 Months
Find the Maximum Number of Elements in Subset
Task Scheduler II
Construct Binary Tree from Preorder and Inorder Traversal6 Months
Find the Difference6 Months
Richest Customer Wealth6 Months
Human Traffic of Stadium3 Months
Longest Substring with At Least K Repeating Characters3 Months
Single Number30 Days
Counter3 Months
Lexicographically Minimum String After Removing Stars
Merge Nodes in Between Zeros
Maximum Unique Subarray Sum After Deletion
Binary Tree Level Order Traversal II
Third Maximum Number30 Days
Merge In Between Linked Lists
Kth Smallest Number in Multiplication Table
Words Within Two Edits of Dictionary
Find Minimum Operations to Make All Elements Divisible by Three6 Months
Set Mismatch3 Months
Repeated Substring Pattern6 Months
Closest Binary Search Tree Value
Minimum White Tiles After Covering With Carpets
Meeting Rooms6 Months
Maximum Average Pass Ratio6 Months
Delete Columns to Make Sorted III
Cache With Time Limit6 Months
Find Common Elements Between Two Arrays
Pascal's Triangle II30 Days
Repeated String Match
Maximum Average Subarray I30 Days
Maximum Size Subarray Sum Equals k
Count the Number of Substrings With Dominant Ones6 Months
Repeated DNA Sequences
Read N Characters Given read4 II - Call Multiple Times
Minimum Path Cost in a Hidden Grid
Design a Text Editor3 Months
Design an Ordered Stream
Plus One Linked List
Minimize Max Distance to Gas Station
2 Keys Keyboard
Shortest Subarray with Sum at Least K
Custom Sort String
Binary Tree Inorder Traversal30 Days
Subarray Sums Divisible by K3 Months
Single-Threaded CPU
Find Elements in a Contaminated Binary Tree
Find Words Containing Character6 Months
Evaluate Boolean Binary Tree
Friend Requests II: Who Has the Most Friends
Minimum Number of Changes to Make Binary String Beautiful
Unique Length-3 Palindromic Subsequences
Continuous Subarrays
Find the Lexicographically Largest String From the Box I
Verify Preorder Serialization of a Binary Tree
Robot Room Cleaner
Wiggle Sort II6 Months
Most Profit Assigning Work
Minimum Array Sum
Count Items Matching a Rule
Put Marbles in Bags
Calculate Money in Leetcode Bank6 Months
Lexicographical Numbers6 Months
Lowest Common Ancestor of a Binary Tree III6 Months
Buildings With an Ocean View
Convert Integer to the Sum of Two No-Zero Integers6 Months
Max Consecutive Ones II
Partition List3 Months
Score of a String6 Months
Arithmetic Slices3 Months
Largest Sum of Averages
24 Game6 Months
Minimum Unique Word Abbreviation
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Strong Friendship3 Months
Count the Number of Special Characters II
Rearranging Fruits
H-Index6 Months
Number of Enclaves
First Letter to Appear Twice
Booking Concert Tickets in Groups
Camelcase Matching
Maximum Number of Points From Grid Queries
Cracking the Safe
K-Similar Strings
Sort Array by Moving Items to Empty Space
Find Expensive Cities
Maximum XOR With an Element From Array
Minimum Time to Build Blocks
Meeting Scheduler
Count Integers in Intervals
Optimize Water Distribution in a Village
Find Champion I
Tree of Coprimes
Count the Number of Good Partitions
Binary Tree Vertical Order Traversal
Maximum Nesting Depth of the Parentheses
Array of Doubled Pairs
Maximum Difference Between Even and Odd Frequency I
Image Overlap
Replace All Digits with Characters
Smallest Index With Equal Value
Positions of Large Groups
Get the Size of a DataFrame
My Calendar II3 Months
Minimum Skips to Arrive at Meeting On Time
Least Number of Unique Integers after K Removals
Lonely Pixel II
Maximize Consecutive Elements in an Array After Modification
Rings and Rods
Number of Unique Good Subsequences
Maximum Non Negative Product in a Matrix
Maximize Sum Of Array After K Negations
Online Election
Maximum Split of Positive Even Integers
Minimize Maximum Value in a Grid
Minimum Number of Operations to Move All Balls to Each Box6 Months
First Bad Version3 Months
Maximum Number of Events That Can Be Attended II
Minimum Cost to Connect Two Groups of Points
Not Boring Movies3 Months
House Robber IV
Count Ways to Distribute Candies
Maximum Number That Sum of the Prices Is Less Than or Equal to K
Change Minimum Characters to Satisfy One of Three Conditions
Minimum Pair Removal to Sort Array I3 Months
Smallest Rectangle Enclosing Black Pixels
Number of Ways to Rearrange Sticks With K Sticks Visible
Number of Equal Numbers Blocks
Similar RGB Color
Count Pairs of Equal Substrings With Minimum Difference
Random Point in Non-overlapping Rectangles
Find Positive Integer Solution for a Given Equation
Make Number of Distinct Characters Equal
Range Addition
Convex Polygon
Binary Search30 Days
Jump Game VII
Path Sum3 Months
Find the Subtasks That Did Not Execute
Valid Word Square
People Whose List of Favorite Companies Is Not a Subset of Another List
Minimum Cost to Reach Destination in Time
Minimum Number of Increments on Subarrays to Form a Target Array6 Months
Determine if a Cell Is Reachable at a Given Time
Minimum Operations to Make Array Equal to Target
Finding the Number of Visible Mountains
Identify the Largest Outlier in an Array
Find Maximum Non-decreasing Array Length
Longest Balanced Subarray II30 Days
Count Prefixes of a Given String
Complete Binary Tree Inserter
Amount of New Area Painted Each Day
Perfect Number30 Days
Reordered Power of 2
Maximum Performance of a Team
Shortest Completing Word
Minimum Sum of Values by Dividing Array
Minimum Number of Operations to Reinitialize a Permutation
Largest Submatrix With Rearrangements
Max Sum of Rectangle No Larger Than K
Maximize Subarray GCD Score
Frequency of the Most Frequent Element3 Months
All Paths from Source Lead to Destination
Remove Comments
Count Houses in a Circular Street
Shortest Impossible Sequence of Rolls
Three Divisors6 Months
Minimum Insertions to Balance a Parentheses String
Top Three Wineries
Count Subarrays With More Ones Than Zeros
Find Nearest Right Node in Binary Tree
Count Words Obtained After Adding a Letter
Amount of Time for Binary Tree to Be Infected
Binary Tree Nodes
Ambiguous Coordinates
Brace Expansion II
Sparse Matrix Multiplication
Maximum Number of Operations With the Same Score I
All Divisions With the Highest Score of a Binary Array
Transform to Chessboard
Find the Celebrity
Count Asterisks
Sentence Screen Fitting
Find Latest Group of Size M
Paint House
Wiggle Sort
Valid Parenthesis String3 Months
Insert into a Sorted Circular Linked List
Big Countries3 Months
Sum of Good Subsequences6 Months
Closest Nodes Queries in a Binary Search Tree
Count Fertile Pyramids in a Land
Kth Smallest Product of Two Sorted Arrays6 Months
Merge Triplets to Form Target Triplet
Encode String with Shortest Length
Sum of Mutated Array Closest to Target
Number of Beautiful Partitions
Checking Existence of Edge Length Limited Paths
Number of Good Paths
Most Frequent Prime
Sum of Subarray Ranges
Strobogrammatic Number
Process Restricted Friend Requests
Find the Maximum Achievable Number6 Months
Ransom Note30 Days
Minimum Sensors to Cover Grid
Confusing Number
Remove All Ones With Row and Column Flips II
Confusing Number II
Check If Two Expression Trees are Equivalent
Check if DFS Strings Are Palindromes
Kth Smallest Subarray Sum
Decrease Elements To Make Array Zigzag
Number of Ways to Stay in the Same Place After Some Steps
Maximum Score After Applying Operations on a Tree
Minimum Number of Days to Eat N Oranges
Binary String With Substrings Representing 1 To N
Pyramid Transition Matrix3 Months
Valid Square
Latest Time You Can Obtain After Replacing Characters
Partition Array According to Given Pivot
Find Two Non-overlapping Sub-arrays Each With Target Sum
Max Pair Sum in an Array
Longest Chunked Palindrome Decomposition
Most Frequent Number Following Key In an Array
Max Dot Product of Two Subsequences3 Months
Longest Increasing Subsequence II
Rotate List6 Months
Nested List Weight Sum6 Months
Find the Safest Path in a Grid3 Months
Merge Similar Items
Student Attendance Record I
Rearrange Spaces Between Words
Longest Subsequence Repeated k Times
String Transforms Into Another String
Minimum Cost to Make Array Equalindromic
Distribute Repeating Integers
Lonely Pixel I
Sentence Similarity6 Months
Recover the Original Array
Determine if Two Events Have Conflict
Find All Lonely Numbers in the Array
Maximum Number of Groups Getting Fresh Donuts
Minimum Time to Remove All Cars Containing Illegal Goods
Check if Grid can be Cut into Sections
Check if There Is a Valid Parentheses String Path
Running Sum of 1d Array30 Days
Count Caesar Cipher Pairs6 Months
Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree
Equal Rational Numbers
Maximum Score of a Node Sequence6 Months
All People Report to the Given Manager
Remove Duplicates from Sorted Array II30 Days
Path Existence Queries in a Graph I
Number of Ways to Reorder Array to Get Same BST
Predict the Winner6 Months
Flatten Nested List Iterator6 Months
Decompress Run-Length Encoded List
Maximum Score from Performing Multiplication Operations
Occurrences After Bigram
Minimum Path Cost in a Grid
Integer Replacement
Find Anagram Mappings
Mean of Array After Removing Some Elements
Number of Steps to Reduce a Number to Zero6 Months
Find Eventual Safe States3 Months
Split Two Strings to Make Palindrome
Count Hills and Valleys in an Array
Count K-Subsequences of a String With Maximum Beauty
To Be Or Not To Be3 Months
Distance Between Bus Stops
Largest Subarray Length K
Where Will the Ball Fall
Divide Array Into Increasing Sequences
Number of Boomerangs
Compare Strings by Frequency of the Smallest Character
Simplified Fractions
Spiral Matrix III
Find the Count of Monotonic Pairs I
Form Largest Integer With Digits That Add up to Target
Latest Time by Replacing Hidden Digits
Next Closest Time
DI String Match
Longest Line of Consecutive One in Matrix
Redundant Connection6 Months
Count Number of Distinct Integers After Reverse Operations
Disconnect Path in a Binary Matrix by at Most One Flip
Sort Integers by The Power Value6 Months
Flip Game II
Campus Bikes II
Minimize Product Sum of Two Arrays
Minimum Operations to Convert Number
Maximum AND Sum of Array
Find the Minimum Number of Fibonacci Numbers Whose Sum Is K
Single-Row Keyboard
Design Phone Directory
Maximum Value of K Coins From Piles
Minimum Time Visiting All Points3 Months
Longest Uncommon Subsequence I
Special Array With X Elements Greater Than or Equal X
Reach End of Array With Max Score
Minimum Time to Visit a Cell In a Grid
Largest Color Value in a Directed Graph
Trionic Array II30 Days
XOR Queries of a Subarray
Solving Questions With Brainpower
Find Right Interval
Minimum Removals to Balance Array30 Days
Maximum Matching of Players With Trainers
Encrypt and Decrypt Strings
Minimum Cost to Hire K Workers
Minimum Operations to Make Array Values Equal to K
Delete Nodes From Linked List Present in Array6 Months
Count Sorted Vowel Strings
Sort Array By Parity II3 Months
Coloring A Border3 Months
Sum of Distances
Longest Subarray With Maximum Bitwise AND
Find the K-th Character in String Game I
Similar String Groups
Divide an Array Into Subarrays With Minimum Cost I30 Days
Trim a Binary Search Tree3 Months
Find the Punishment Number of an Integer
Apply Transform Over Each Element in Array6 Months
Minimum Operations to Make the Integer Zero6 Months
Distribute Candies
Total Characters in String After Transformations II
Group Sold Products By The Date6 Months
Maximum Score Words Formed by Letters
Path Existence Queries in a Graph II
Maximum Value of an Ordered Triplet I
Implement Magic Dictionary
Stream of Characters
Design Movie Rental System
Maximum Square Area by Removing Fences From a Field3 Months
Sort Vowels in a String
Gray Code6 Months
Largest Combination With Bitwise AND Greater Than Zero
Zero Array Transformation IV
Maximum Number of Words Found in Sentences
Maximum Sum of 3 Non-Overlapping Subarrays
Flip Equivalent Binary Trees
Valid Boomerang
Find Maximum Removals From Source String
Find Mirror Score of a String
Find the Shortest Superstring
Fill Missing Data
Keep Multiplying Found Values by Two6 Months
Find Most Frequent Vowel and Consonant6 Months
Check If All 1's Are at Least Length K Places Away6 Months
Egg Drop With 2 Eggs and N Floors
Move Pieces to Obtain a String30 Days
Biggest Single Number
Find the Maximum Number of Fruits Collected
Redundant Connection II
Mirror Reflection
Number of Senior Citizens
Minimum Number Game3 Months
Find Smallest Letter Greater Than Target
Queries Quality and Percentage
Subsequence Sum After Capping Elements6 Months
Balanced K-Factor Decomposition
Minimum Domino Rotations For Equal Row
Buy Two Chocolates
Check Completeness of a Binary Tree
Shortest Path Visiting All Nodes6 Months
Adding Spaces to a String
Maximum Absolute Sum of Any Subarray
Determine Whether Matrix Can Be Obtained By Rotation
Make Array Non-decreasing
Minimum Time to Repair Cars
Reverse String II30 Days
Check If Digits Are Equal in String After Operations II
Merge BSTs to Create Single BST
Separate Squares II3 Months
Minimum Cost Walk in Weighted Graph
Employees Whose Manager Left the Company
Delete Greatest Value in Each Row
Find a Safe Walk Through a Grid
Arithmetic Slices II - Subsequence
Count Number of Trapezoids II3 Months
Twisted Mirror Path Count
Maximum Subarray Sum With Length Divisible by K3 Months
Longest Balanced Substring I30 Days
Reschedule Meetings for Maximum Free Time I
Number of Unique Subjects Taught by Each Teacher
Partition Array Such That Maximum Difference Is K
Two-Letter Card Game6 Months
Jump Game VI6 Months
Maximum Vacation Days
Count Submatrices With All Ones
Maximum Total from Optimal Activation Order
Hash Divided String
Total Waviness of Numbers in Range I3 Months
Count Special Quadruplets
Uncommon Words from Two Sentences
Minimum Cost to Convert String II
Find Champion II
Count The Number of Winning Sequences
Count All Valid Pickup and Delivery Options
Partition Array to Minimize XOR
Rotate Function
Sum of All Subset XOR Totals
Filter Elements from Array
Find if Array Can Be Sorted
Frog Jump II
Check if the Sentence Is Pangram6 Months
Naming a Company
Maximum Number of Distinct Elements After Operations6 Months
Lexicographically Smallest Equivalent String
Zero Array Transformation I
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Stone Game III
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