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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.

top-specificgoogle-prep
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2217
Find Servers That Handled Most Number of Requests
Hard
Non-negative Integers without Consecutive Ones
Hard
Available Captures for Rook6 Months
Easy
Number of Subarrays With LCM Equal to K
Medium
Walking Robot Simulation II
Medium
Maximize the Number of Target Nodes After Connecting Trees I
Medium
Reverse Linked List30 Days
Easy
Univalued Binary Tree
Easy
Design Tic-Tac-Toe
Medium
Number of Orders in the Backlog3 Months
Medium
String Without AAA or BBB
Medium
Minimum Height Trees
Medium
Largest 3-Same-Digit Number in String
Easy
Count the Number of Square-Free Subsets
Medium
Check If a Word Occurs As a Prefix of Any Word in a Sentence
Easy
Dota2 Senate
Medium
Grumpy Bookstore Owner
Medium
Minimum Additions to Make Valid String
Medium
Alternating Groups II
Medium
Subarray Product Less Than K6 Months
Medium
Word Ladder II3 Months
Hard
N-Queens II6 Months
Hard
Knight Probability in Chessboard
Medium
Insert Delete GetRandom O(1) - Duplicates allowed6 Months
Hard
Inorder Successor in BST
Medium
Split the Array
Easy
Length of Longest V-Shaped Diagonal Segment
Hard
Design A Leaderboard3 Months
Medium
Find the Number of Copy Arrays
Medium
Right Triangles
Medium
Unique Substrings in Wraparound String
Medium
Make Array Non-decreasing or Non-increasing
Hard
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
Second Largest Digit in a String
Easy
Furthest Building You Can Reach
Medium
Minimum Penalty for a Shop3 Months
Medium
Swap For Longest Repeated Character Substring
Medium
Find Beautiful Indices in the Given Array II
Hard
Minimum Moves to Convert String
Easy
Maximum Area Rectangle With Point Constraints II
Hard
Apply Operations to Make Two Strings Equal
Medium
Binary Gap
Easy
Maximum White Tiles Covered by a Carpet
Medium
Tweet Counts Per Frequency
Medium
Viewers Turned Streamers
Hard
Restore The Array
Hard
Operations on Tree
Medium
Most Beautiful Item for Each Query
Medium
Day of the Year
Easy
User Activity for the Past 30 Days I3 Months
Easy
Max Stack
Hard
Longest Nice Subarray
Medium
Minimum ASCII Delete Sum for Two Strings6 Months
Medium
Minimum Number of Operations to Sort a Binary Tree by Level
Medium
Minimum Index Sum of Two Lists
Easy
Process Tasks Using Servers
Medium
Maximum Fruits Harvested After at Most K Steps
Hard
Minimum Difficulty of a Job Schedule6 Months
Hard
Special Binary String
Hard
Maximum Side Length of a Square with Sum Less than or Equal to Threshold3 Months
Medium
Minimum Genetic Mutation6 Months
Medium
Special Array II
Medium
Find a Peak Element II6 Months
Medium
Sort Matrix by Diagonals6 Months
Medium
Max Difference You Can Get From Changing an Integer
Medium
Print Binary Tree
Medium
Best Sightseeing Pair
Medium
Second Highest Salary3 Months
Medium
Fruits Into Baskets II
Easy
Find Followers Count
Easy
Min Stack30 Days
Medium
Valid Parentheses30 Days
Easy
Count Number of Ways to Place Houses
Medium
Largest Number After Digit Swaps by Parity
Easy
Number of Connected Components in an Undirected Graph
Medium
Kth Smallest Element in a Sorted Matrix
Medium
Open the Lock
Medium
Maximize Area of Square Hole in Grid3 Months
Medium
Snapshot Array6 Months
Medium
Validate IP Address
Medium
Find the Length of the Longest Common Prefix
Medium
Design HashMap
Easy
Asteroid Collision3 Months
Medium
Permutation Sequence30 Days
Hard
String Compression II
Hard
Course Schedule II3 Months
Medium
Divide an Array Into Subarrays With Minimum Cost II6 Months
Hard
Meeting Rooms II30 Days
Medium
Largest Magic Square3 Months
Medium
Escape a Large Maze
Hard
Shortest Subarray With OR at Least K II
Medium
Count Operations to Obtain Zero
Easy
Majority Element II3 Months
Medium
Best Meeting Point
Hard
Minimum Value to Get Positive Step by Step Sum6 Months
Easy
Maximum Subarray Sum with One Deletion
Medium
Count Unguarded Cells in the Grid6 Months
Medium
Minimum Deletions to Make String Balanced30 Days
Medium
Rotating the Box
Medium
Find the Closest Palindrome
Hard
Vowel Spellchecker6 Months
Medium
Walking Robot Simulation
Medium
Maximum Alternating Subsequence Sum
Medium
Alternating Groups I
Easy
Watering Plants
Medium
Difference Between Element Sum and Digit Sum of an Array3 Months
Easy
Shortest Distance from All Buildings
Hard
Find Resultant Array After Removing Anagrams6 Months
Easy
Flatten 2D Vector
Medium
Brick Wall
Medium
Count Equal and Divisible Pairs in an Array
Easy
Top K Frequent Words3 Months
Medium
Design Skiplist
Hard
Maximum Area Rectangle With Point Constraints I3 Months
Medium
Find the Longest Equal Subarray
Medium
Count the Number of Arrays with K Matching Adjacent Elements
Hard
Maximum Count of Positive Integer and Negative Integer6 Months
Easy
K Inverse Pairs Array
Hard
Find Closest Number to Zero
Easy
Smallest Range Covering Elements from K Lists
Hard
Invalid Tweets3 Months
Easy
Monthly Transactions I3 Months
Medium
Convert Sorted List to Binary Search Tree6 Months
Medium
Delete Characters to Make Fancy String
Easy
Tree Node
Medium
Avoid Flood in The City6 Months
Medium
Maximize the Number of Target Nodes After Connecting Trees II
Hard
Find Greatest Common Divisor of Array6 Months
Easy
Special Array I
Easy
Customer Placing the Largest Number of Orders3 Months
Easy
Graph Valid Tree6 Months
Medium
Minimum Bit Flips to Convert Number
Easy
Customer Who Visited but Did Not Make Any Transactions
Easy
Bitwise XOR of All Pairings
Medium
Jump Game II3 Months
Medium
Linked List in Binary Tree
Medium
Minimum Number of Steps to Make Two Strings Anagram
Medium
Determine if Two Strings Are Close3 Months
Medium
Minimum Score of a Path Between Two Cities
Medium
Unique Binary Search Trees
Medium
Subrectangle Queries
Medium
Spiral Matrix30 Days
Medium
Sort Integers by The Number of 1 Bits
Easy
Count Good Triplets
Easy
Investments in 20163 Months
Medium
Minimized Maximum of Products Distributed to Any Store
Medium
Top Travellers
Easy
Find Common Characters6 Months
Easy
Zigzag Conversion30 Days
Medium
Reverse Prefix of Word6 Months
Easy
Pacific Atlantic Water Flow30 Days
Medium
Design Most Recently Used Queue
Medium
Letter Case Permutation
Medium
Longest Univalue Path
Medium
Clone Graph3 Months
Medium
Maximum Product Subarray3 Months
Medium
Time Based Key-Value Store3 Months
Medium
Video Stitching
Medium
Battleships in a Board
Medium
Transpose Matrix6 Months
Easy
Serialize and Deserialize Binary Tree3 Months
Hard
Invalid Transactions
Medium
Minimum Deletions to Make Character Frequencies Unique
Medium
Find Beautiful Indices in the Given Array I6 Months
Medium
Two City Scheduling
Medium
Minimum Area Rectangle II6 Months
Medium
Generate Parentheses30 Days
Medium
Distribute Candies Among Children II
Medium
Product of Array Except Self30 Days
Medium
Non-decreasing Subsequences
Medium
Divide Intervals Into Minimum Number of Groups
Medium
Design a Stack With Increment Operation3 Months
Medium
Remove Sub-Folders from the Filesystem
Medium
Sum of Perfect Square Ancestors6 Months
Hard
Shopping Offers
Medium
Partition Array Into Two Arrays to Minimize Sum Difference3 Months
Hard
Path Sum III30 Days
Medium
Maximum Xor Product
Medium
Alien Dictionary6 Months
Hard
Movie Rating
Medium
Find Original Array From Doubled Array
Medium
The Number of Employees Which Report to Each Employee6 Months
Easy
3Sum With Multiplicity
Medium
Encode and Decode Strings3 Months
Medium
Count Subarrays With Score Less Than K
Hard
Design HashSet
Easy
Palindrome Pairs
Hard
Pow(x, n)3 Months
Medium
Longest Substring Without Repeating Characters30 Days
Medium
Copy List with Random Pointer3 Months
Medium
Maximum Number of Words You Can Type6 Months
Easy
Power of Four
Easy
All Nodes Distance K in Binary Tree6 Months
Medium
Building H2O
Medium
Minimum Distance Between BST Nodes
Easy
Number of Days Between Two Dates
Easy
Longest Palindromic Substring30 Days
Medium
Maximum Students Taking Exam3 Months
Hard
Create Target Array in the Given Order
Easy
Maximum Distance in Arrays6 Months
Medium
1-bit and 2-bit Characters6 Months
Easy
Verifying an Alien Dictionary
Easy
Managers with at Least 5 Direct Reports6 Months
Medium
Subdomain Visit Count3 Months
Medium
Describe the Painting
Medium
Finding Pairs With a Certain Sum
Medium
Pass the Pillow
Easy
Number of Same-End Substrings
Medium
Bricks Falling When Hit
Hard
Closest Subsequence Sum
Hard
Baseball Game
Easy
Check if Number Has Equal Digit Count and Digit Value
Easy
Make the XOR of All Segments Equal to Zero
Hard
Count Number of Homogenous Substrings
Medium
Count the Number of Consistent Strings
Easy
Search Suggestions System6 Months
Medium
Minimum Replacements to Sort the Array
Hard
Find Minimum Diameter After Merging Two Trees
Hard
Count the Number of Powerful Integers
Hard
Count Salary Categories
Medium
Find the Longest Valid Obstacle Course at Each Position
Hard
Longest Harmonious Subsequence
Easy
Best Team With No Conflicts
Medium
K Closest Points to Origin
Medium
Maximum Product of Two Elements in an Array
Easy
The Number of the Smallest Unoccupied Chair
Medium
Earliest Second to Mark Indices II
Hard
Minimum Number of Days to Make m Bouquets3 Months
Medium
Next Greater Numerically Balanced Number6 Months
Medium
Subtract the Product and Sum of Digits of an Integer
Easy
Peeking Iterator
Medium
Trapping Rain Water30 Days
Hard
Compare Version Numbers6 Months
Medium
Maximize Distance to Closest Person
Medium
Climbing Stairs30 Days
Easy
Two Sum IV - Input is a BST3 Months
Easy
Car Pooling3 Months
Medium
Design Spreadsheet6 Months
Medium
Binary Tree Paths6 Months
Easy
Find K Closest Elements3 Months
Medium
Binary Number with Alternating Bits30 Days
Easy
Nth Highest Salary3 Months
Medium
Verbal Arithmetic Puzzle
Hard
Count the Hidden Sequences
Medium
Painting the Walls
Hard
Longest String Chain6 Months
Medium
Maximum Path Quality of a Graph
Hard
Word Abbreviation
Hard
Group Shifted Strings30 Days
Medium
Find Numbers with Even Number of Digits
Easy
Substring with Concatenation of All Words6 Months
Hard
Unique Morse Code Words
Easy
Maximum Sum Circular Subarray6 Months
Medium
Minimum Cost For Tickets
Medium
Stone Game IX
Medium
Find the K-Beauty of a Number
Easy
Longest Subsequence With Decreasing Adjacent Difference
Medium
Find Closest Node to Given Two Nodes
Medium
Koko Eating Bananas30 Days
Medium
Unique Email Addresses6 Months
Easy
Kth Smallest Element in a BST3 Months
Medium
Optimal Account Balancing3 Months
Hard
Maximum Depth of Binary Tree6 Months
Easy
Subarray With Elements Greater Than Varying Threshold
Hard
Next Permutation30 Days
Medium
Split Array Largest Sum30 Days
Hard
Diameter of Binary Tree3 Months
Easy
Construct Quad Tree
Medium
Maximum Height by Stacking Cuboids
Hard
Merge Intervals30 Days
Medium
Basic Calculator III6 Months
Hard
Find the Prefix Common Array of Two Arrays
Medium
Random Pick with Weight6 Months
Medium
Maximum Product After K Increments
Medium
Count Sub Islands
Medium
Daily Temperatures6 Months
Medium
Swap Adjacent in LR String3 Months
Medium
Permutation in String3 Months
Medium
Swim in Rising Water30 Days
Hard
Rabbits in Forest
Medium
Parallel Courses III
Hard
Maximum Profit in Job Scheduling6 Months
Hard
Game of Life
Medium
Find the Distance Value Between Two Arrays
Easy
Count Vowel Strings in Ranges
Medium
Longest Repeating Character Replacement30 Days
Medium
Sort Even and Odd Indices Independently6 Months
Easy
Maximum Good Subarray Sum
Medium
Reverse Bits30 Days
Easy
Basic Calculator II30 Days
Medium
Exchange Seats6 Months
Medium
Maximum Width Ramp6 Months
Medium
XOR Operation in an Array6 Months
Easy
Throne Inheritance
Medium
Count Islands With Total Value Divisible by K
Medium
Number of Visible People in a Queue30 Days
Hard
Maximum Number of Visible Points
Hard
Rotate Image30 Days
Medium
The Number of Beautiful Subsets
Medium
Average Time of Process per Machine3 Months
Easy
Merge Two Binary Trees
Easy
Group the People Given the Group Size They Belong To
Medium
Maximum Swap
Medium
Remove All Occurrences of a Substring6 Months
Medium
Make Lexicographically Smallest Array by Swapping Elements
Medium
Minimum String Length After Removing Substrings
Easy
Find Words That Can Be Formed by Characters
Easy
Divisor Game30 Days
Easy
Manhattan Distances of All Arrangements of Pieces
Hard
Number of Ways to Form a Target String Given a Dictionary
Hard
Queue Reconstruction by Height6 Months
Medium
Longest Strictly Increasing or Strictly Decreasing Subarray
Easy
Valid Palindrome II6 Months
Easy
Count Subarrays With Median K
Hard
Two Furthest Houses With Different Colors
Easy
Find All Anagrams in a String3 Months
Medium
House Robber III3 Months
Medium
Count Elements With Maximum Frequency
Easy
Valid Word
Easy
Stock Price Fluctuation
Medium
First Missing Positive30 Days
Hard
Count Ways To Build Good Strings
Medium
Longest Non-decreasing Subarray From Two Arrays
Medium
Longest Word in Dictionary
Medium
Line Reflection
Medium
IPO
Hard
Minimum Area Rectangle3 Months
Medium
Palindrome Partitioning II6 Months
Hard
Reverse Odd Levels of Binary Tree
Medium
Remove Boxes6 Months
Hard
Maximum Sum BST in Binary Tree3 Months
Hard
Longest Increasing Path in a Matrix6 Months
Hard
Smallest Substring With Identical Characters I
Hard
Design Excel Sum Formula
Hard
Number of Valid Move Combinations On Chessboard
Hard
Checking Existence of Edge Length Limited Paths II
Hard
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts6 Months
Medium
Shortest Way to Form String
Medium
Minimum Window Substring30 Days
Hard
Sqrt(x)3 Months
Easy
IP to CIDR6 Months
Medium
Check If It Is a Good Array
Hard
Largest Number30 Days
Medium
Airplane Seat Assignment Probability
Medium
Minimum Difference Between Highest and Lowest of K Scores3 Months
Easy
Find All Numbers Disappeared in an Array30 Days
Easy
Unique Paths II
Medium
Students and Examinations6 Months
Easy
Maximum Number of Tasks You Can Assign
Hard
Convert Binary Number in a Linked List to Integer
Easy
My Calendar I6 Months
Medium
Make Array Empty
Hard
Binary Tree Upside Down
Medium
Middle of the Linked List3 Months
Easy
Max Increase to Keep City Skyline30 Days
Medium
Max Chunks To Make Sorted
Medium
String Transformation
Hard
Minimum Knight Moves
Medium
Find Winner on a Tic Tac Toe Game
Easy
Wildcard Matching30 Days
Hard
Count Paths That Can Form a Palindrome in a Tree
Hard
Analyze User Website Visit Pattern
Medium
Regular Expression Matching30 Days
Hard
Capacity To Ship Packages Within D Days3 Months
Medium
Brace Expansion
Medium
Task Scheduler6 Months
Medium
Count Good Triplets in an Array
Hard
Valid Sudoku6 Months
Medium
Maximize Subarray Sum After Removing All Occurrences of One Element
Hard
Frog Position After T Seconds
Hard
Number of 1 Bits6 Months
Easy
Minimum Number of K Consecutive Bit Flips
Hard
Paint House III
Hard
Find the Minimum Area to Cover All Ones II
Hard
Number of Ways to Build Sturdy Brick Wall
Medium
Insert Delete GetRandom O(1)3 Months
Medium
Lemonade Change
Easy
Escape the Spreading Fire
Hard
Walls and Gates
Medium
Check if a Parentheses String Can Be Valid
Medium
Basic Calculator30 Days
Hard
Maximum Sum of Distinct Subarrays With Length K6 Months
Medium
Max Points on a Line6 Months
Hard
Guess Number Higher or Lower II
Medium
Successful Pairs of Spells and Potions
Medium
Toeplitz Matrix3 Months
Easy
Decode String30 Days
Medium
Find Valid Matrix Given Row and Column Sums
Medium
Bulls and Cows
Medium
Sliding Window Median3 Months
Hard
Reverse Words in a String3 Months
Medium
Snakes and Ladders3 Months
Medium
Squares of a Sorted Array30 Days
Easy
Cherry Pickup
Hard
Last Person to Fit in the Bus6 Months
Medium
Satisfiability of Equality Equations
Medium
Heaters6 Months
Medium
Minimize the Maximum Difference of Pairs
Medium
Pascal's Triangle30 Days
Easy
Maximum Total Damage With Spell Casting6 Months
Medium
Rearrange String k Distance Apart
Hard
Bitwise ORs of Subarrays
Medium
Single Number III
Medium
Power Grid Maintenance6 Months
Medium
Rotting Oranges30 Days
Medium
Detect Cycles in 2D Grid
Medium
String Compression3 Months
Medium
All O`one Data Structure
Hard
Guess the Word30 Days
Hard
Find and Replace Pattern6 Months
Medium
Closest Binary Search Tree Value II
Hard
Height Checker
Easy
Couples Holding Hands
Hard
Longest Common Prefix30 Days
Easy
Restaurant Growth
Medium
Shuffle an Array
Medium
Valid Perfect Square6 Months
Easy
Count Univalue Subtrees
Medium
Find The Original Array of Prefix Xor
Medium
Logger Rate Limiter30 Days
Easy
Design Circular Queue3 Months
Medium
Partition Array Into Three Parts With Equal Sum
Easy
Path With Minimum Effort3 Months
Medium
Permutations30 Days
Medium
Divide Array in Sets of K Consecutive Numbers3 Months
Medium
Partition to K Equal Sum Subsets3 Months
Medium
Sort the Matrix Diagonally
Medium
Find All Possible Recipes from Given Supplies3 Months
Medium
Maximum Value at a Given Index in a Bounded Array
Medium
Minimum Adjacent Swaps for K Consecutive Ones
Hard
Evaluate the Bracket Pairs of a String
Medium
Find Longest Special Substring That Occurs Thrice II
Medium
Reconstruct Original Digits from English
Medium
Minimize Hamming Distance After Swap Operations
Medium
Isomorphic Strings30 Days
Easy
Reaching Points
Hard
Find the Minimum Area to Cover All Ones I
Medium
Trapping Rain Water II30 Days
Hard
Minimum Number of Operations to Make Array Continuous6 Months
Hard
Move Zeroes30 Days
Easy
Excel Sheet Column Number6 Months
Easy
Minimize Maximum Component Cost
Medium
Making A Large Island3 Months
Hard
Count the Digits That Divide a Number
Easy
Sum of Beautiful Subsequences
Hard
Escape The Ghosts
Medium
Stamping the Grid
Hard
Remove K Digits3 Months
Medium
Add Binary30 Days
Easy
Collect Coins in a Tree
Hard
Merge Sorted Array30 Days
Easy
Minimum Operations to Make Character Frequencies Equal
Hard
Linked List Cycle II3 Months
Medium
Design an ATM Machine
Medium
Taking Maximum Energy From the Mystic Dungeon6 Months
Medium
Longest Common Subsequence30 Days
Medium
Shortest Path in Binary Matrix6 Months
Medium
Closest Prime Numbers in Range
Medium
Find Minimum Time to Reach Last Room I
Medium
Rank Teams by Votes
Medium
Minimum Edge Reversals So Every Node Is Reachable
Hard
Ways to Split Array Into Three Subarrays
Medium
Roman to Integer30 Days
Easy
Range Sum Query 2D - Immutable3 Months
Medium
Minimum Sideway Jumps
Medium
Frog Jump
Hard
Intersection of Two Linked Lists30 Days
Easy
Burst Balloons3 Months
Hard
Find Valid Pair of Adjacent Digits in String
Easy
Combination Sum3 Months
Medium
Container With Most Water30 Days
Medium
Sort Transformed Array30 Days
Medium
Populating Next Right Pointers in Each Node II
Medium
Department Highest Salary6 Months
Medium
Chalkboard XOR Game
Hard
Bus Routes30 Days
Hard
Maximum Number of Vowels in a Substring of Given Length
Medium
Design Snake Game
Medium
Set Matrix Zeroes3 Months
Medium
Broken Calculator
Medium
Non-overlapping Intervals3 Months
Medium
Fair Candy Swap
Easy
Rectangle Overlap
Easy
Longest Valid Parentheses30 Days
Hard
Web Crawler Multithreaded
Medium
Fraction Addition and Subtraction
Medium
Count Vowel Substrings of a String6 Months
Easy
LRU Cache30 Days
Medium
Robot Bounded In Circle
Medium
Minimum Equal Sum of Two Arrays After Replacing Zeros
Medium
Minimum Absolute Difference Between Elements With Constraint
Medium
Kth Largest Element in a Stream30 Days
Easy
Word Search II6 Months
Hard
Minimum Time to Collect All Apples in a Tree
Medium
LFU Cache6 Months
Hard
Palindromic Substrings
Medium
Time Needed to Rearrange a Binary String
Medium
Distribute Coins in Binary Tree
Medium
Maximum Ascending Subarray Sum
Easy
Exclusive Time of Functions3 Months
Medium
Alice and Bob Playing Flower Game3 Months
Medium
Max Sum of a Pair With Equal Sum of Digits
Medium
Count Subarrays With Fixed Bounds
Hard
As Far from Land as Possible6 Months
Medium
Number of Islands30 Days
Medium
Split a String in Balanced Strings
Easy
Maximal Square3 Months
Medium
Insert Interval30 Days
Medium
Edit Distance30 Days
Medium
Binary Tree Cameras
Hard
Restore IP Addresses
Medium
Find the Smallest Divisor Given a Threshold30 Days
Medium
Course Schedule30 Days
Medium
Search a 2D Matrix II6 Months
Medium
Single Element in a Sorted Array30 Days
Medium
Longest Arithmetic Subsequence3 Months
Medium
Serialize and Deserialize BST
Medium
The Skyline Problem3 Months
Hard
Shifting Letters II
Medium
Count the Number of Inversions
Hard
Interval List Intersections3 Months
Medium
Shortest Bridge3 Months
Medium
Minimum Cost Path with Edge Reversals
Medium
Average Waiting Time
Medium
Search in Rotated Sorted Array30 Days
Medium
Range Product Queries of Powers
Medium
Backspace String Compare3 Months
Easy
Minimum Number of Refueling Stops3 Months
Hard
Find the Index of the First Occurrence in a String30 Days
Easy
Contains Duplicate30 Days
Easy
Two Sum II - Input Array Is Sorted30 Days
Medium
Product of the Last K Numbers
Medium
Count and Say3 Months
Medium
Word Ladder30 Days
Hard
Count Square Submatrices with All Ones3 Months
Medium
Divide Nodes Into the Maximum Number of Groups
Hard
Count Binary Substrings30 Days
Easy
Valid Number
Hard
Count Complete Subarrays in an Array
Medium
Minimum Increment to Make Array Unique
Medium
Design Parking System3 Months
Easy
Beautiful Arrangement
Medium
Maximum Subarray30 Days
Medium
Two Sum30 Days
Easy
Design In-Memory File System
Hard
Split Array into Consecutive Subsequences
Medium
Maximum Repeating Substring
Easy
Maximal Rectangle3 Months
Hard
Contiguous Array3 Months
Medium
Remove Invalid Parentheses6 Months
Hard
Count Square Sum Triples3 Months
Easy
Jump Game30 Days
Medium
Word Search3 Months
Medium
Best Time to Buy and Sell Stock II3 Months
Medium
Delete Duplicate Folders in System
Hard
Divide Array Into Arrays With Max Difference
Medium
Count Unreachable Pairs of Nodes in an Undirected Graph
Medium
Monotonic Array3 Months
Easy
Flatten Deeply Nested Array
Medium
Design Underground System
Medium
Sum of Subarray Minimums3 Months
Medium
Check If Array Pairs Are Divisible by k
Medium
Minimum Cost Path with Teleportations30 Days
Hard
Find Duplicate Subtrees6 Months
Medium
Rotate Array30 Days
Medium
Reverse String3 Months
Easy
Merge k Sorted Lists3 Months
Hard
Pairs of Songs With Total Durations Divisible by 60
Medium
Top K Frequent Elements30 Days
Medium
Find All Duplicates in an Array30 Days
Medium
Reorder List3 Months
Medium
Diagonal Traverse3 Months
Medium
Sum of All Odd Length Subarrays
Easy
Construct Binary Tree from Inorder and Postorder Traversal
Medium
Sum of Digit Differences of All Pairs
Medium
Maximize Amount After Two Days of Conversions
Medium
Partition Equal Subset Sum6 Months
Medium
Minimum Cost to Connect Sticks
Medium
Best Time to Buy and Sell Stock30 Days
Easy
3Sum Closest30 Days
Medium
Shortest Palindrome3 Months
Hard
Longest Balanced Subarray I30 Days
Medium
Lowest Common Ancestor of a Binary Tree3 Months
Medium
Delete Node in a BST3 Months
Medium
Make Sum Divisible by P6 Months
Medium
Minimum Absolute Difference30 Days
Easy
Rectangle Area3 Months
Medium
Longest Substring with At Most K Distinct Characters
Medium
HTML Entity Parser
Medium
Combine Two Tables30 Days
Easy
Binary Tree Right Side View6 Months
Medium
Remove Linked List Elements6 Months
Easy
Remove All Adjacent Duplicates in String II
Medium
Minimum One Bit Operations to Make Integers Zero
Hard
Moving Average from Data Stream
Easy
Replace Elements with Greatest Element on Right Side6 Months
Easy
Island Perimeter
Easy
Dungeon Game
Hard
The Maze
Medium
Add Two Numbers30 Days
Medium
Group Anagrams30 Days
Medium
UTF-8 Validation
Medium
Evaluate Division3 Months
Medium
Odd Even Jump
Hard
Missing Ranges
Easy
Binary Tree Maximum Path Sum30 Days
Hard
Maximum Subarray Min-Product
Medium
Median of Two Sorted Arrays30 Days
Hard
Find the City With the Smallest Number of Neighbors at a Threshold Distance
Medium
Subarray Sum Equals K30 Days
Medium
Shortest Word Distance II
Medium
Find the Town Judge
Easy
Triangle6 Months
Medium
Matrix Block Sum
Medium
Implement Trie (Prefix Tree)
Medium
Majority Element30 Days
Easy
Minimum Number of Flips to Make the Binary String Alternating
Medium
Number of Good Leaf Nodes Pairs
Medium
Design Log Storage System
Medium
Encode and Decode TinyURL
Medium
Finding MK Average
Hard
Word Break II3 Months
Hard
Race Car6 Months
Hard
Longest Cycle in a Graph
Hard
Leaf-Similar Trees6 Months
Easy
Candy Crush
Medium
Multiply Strings3 Months
Medium
Max Consecutive Ones III30 Days
Medium
Minimum Time to Complete Trips
Medium
Find Users With Valid E-Mails
Easy
Put Boxes Into the Warehouse I
Medium
Create Binary Tree From Descriptions
Medium
Simplify Path30 Days
Medium
Put Boxes Into the Warehouse II
Medium
Integer to Roman3 Months
Medium
Valid Palindrome30 Days
Easy
Palindrome Number30 Days
Easy
Sort Colors30 Days
Medium
Minimum Number of Operations to Make Word K-Periodic
Medium
Erect the Fence
Hard
Sentence Similarity II
Medium
Employee Importance6 Months
Medium
Lucky Numbers in a Matrix
Easy
Find Minimum Time to Finish All Jobs
Hard
Recyclable and Low Fat Products30 Days
Easy
Symmetric Tree6 Months
Easy
Design Hit Counter3 Months
Medium
Maximum Units on a Truck6 Months
Easy
Greatest Common Divisor of Strings30 Days
Easy
Find the Duplicate Number3 Months
Medium
Find Minimum Time to Reach Last Room II
Medium
Minimum Operations to Make Binary Array Elements Equal to One I
Medium
N-Queens30 Days
Hard
Concatenation of Array30 Days
Easy
Random Pick with Blacklist
Hard
Same Tree30 Days
Easy
Network Delay Time30 Days
Medium
Remove Zero Sum Consecutive Nodes from Linked List
Medium
Minimum Score Triangulation of Polygon6 Months
Medium
Palindrome Permutation
Easy
Maximum Score From Removing Substrings
Medium
Replace Words
Medium
Implement Stack using Queues6 Months
Easy
Sum of Two Integers3 Months
Medium
Final Prices With a Special Discount in a Shop
Easy
Apply Operations to Maximize Frequency Score
Hard
Number of Students Unable to Eat Lunch6 Months
Easy
Minimum Cost Tree From Leaf Values
Medium
Linked List Random Node6 Months
Medium
Maximum Candies You Can Get from Boxes
Hard
Minimum Operations to Exceed Threshold Value II
Medium
Immediate Food Delivery II6 Months
Medium
Find Duplicate File in System
Medium
Binary Search Tree to Greater Sum Tree
Medium
Consecutive Numbers6 Months
Medium
Design Add and Search Words Data Structure
Medium
Sum of Square Numbers6 Months
Medium
All Ancestors of a Node in a Directed Acyclic Graph6 Months
Medium
Largest Rectangle in Histogram30 Days
Hard
Decode the Message
Easy
Zigzag Grid Traversal With Skip
Easy
Parallel Courses
Medium
Letter Combinations of a Phone Number3 Months
Medium
Number of Recent Calls3 Months
Easy
Trips and Users3 Months
Hard
Student Attendance Record II
Hard
Longest Substring with At Most Two Distinct Characters
Medium
Super Egg Drop
Hard
Shortest Common Supersequence
Hard
Remove Max Number of Edges to Keep Graph Fully Traversable
Hard
Reconstruct Itinerary
Hard
Merge Two Sorted Lists3 Months
Easy
Number of Matching Subsequences6 Months
Medium
Minimum Path Sum6 Months
Medium
Robot Collisions
Hard
Construct K Palindrome Strings
Medium
Course Schedule IV
Medium
Count Days Without Meetings
Medium
Palindrome Partitioning3 Months
Medium
The Maze II
Medium
Average Selling Price3 Months
Easy
Minimum Cuts to Divide a Circle
Easy
Critical Connections in a Network6 Months
Hard
Minimum Time to Complete All Tasks
Hard
Gas Station30 Days
Medium
Valid Anagram30 Days
Easy
All Paths From Source to Target
Medium
Number of Digit One3 Months
Hard
Fibonacci Number30 Days
Easy
3Sum30 Days
Medium
Largest Local Values in a Matrix
Easy
Diagonal Traverse II
Medium
Add to Array-Form of Integer6 Months
Easy
Permutations II3 Months
Medium
Find the K-Sum of an Array
Hard
Decode Ways6 Months
Medium
Subsets II30 Days
Medium
Make The String Great
Easy
Delete Nodes And Return Forest
Medium
Subarrays with K Different Integers3 Months
Hard
Minimum Remove to Make Valid Parentheses
Medium
Minimum Operations to Reduce X to Zero
Medium
Find the Number of Ways to Place People II3 Months
Hard
Regions Cut By Slashes
Medium
Validate Stack Sequences
Medium
Online Stock Span3 Months
Medium
Reverse Nodes in k-Group3 Months
Hard
Maximum Length of Pair Chain
Medium
Score of Parentheses
Medium
Flood Fill30 Days
Easy
Uncrossed Lines
Medium
Unique Paths III30 Days
Hard
Reorganize String3 Months
Medium
Reverse Linked List II30 Days
Medium
Android Unlock Patterns3 Months
Medium
Reverse Pairs6 Months
Hard
Find K Pairs with Smallest Sums6 Months
Medium
4 Keys Keyboard
Medium
Rising Temperature3 Months
Easy
Best Time to Buy and Sell Stock with Transaction Fee30 Days
Medium
Minimum Number of Arrows to Burst Balloons6 Months
Medium
Minimum Number of Removals to Make Mountain Array
Hard
Sliding Window Maximum30 Days
Hard
N-Repeated Element in Size 2N Array3 Months
Easy
Maximum Length of Repeated Subarray6 Months
Medium
All Possible Full Binary Trees
Medium
Print in Order
Easy
Number of Provinces6 Months
Medium
Minimum Number of Swaps to Make the String Balanced
Medium
Time Needed to Buy Tickets3 Months
Easy
Path Sum II3 Months
Medium
The Earliest Moment When Everyone Become Friends3 Months
Medium
Water Bottles6 Months
Easy
The Number of Weak Characters in the Game
Medium
Lexicographically Smallest Beautiful String
Hard
Delete and Earn
Medium
Longest Increasing Subsequence30 Days
Medium
Remove Element30 Days
Easy
Maximum Product of Three Numbers
Easy
Boundary of Binary Tree
Medium
Largest Positive Integer That Exists With Its Negative
Easy
Kth Largest Element in an Array30 Days
Medium
Word Break3 Months
Medium
Reverse Vowels of a String3 Months
Easy
Remove Nth Node From End of List3 Months
Medium
Merge Strings Alternately30 Days
Easy
Next Special Palindrome Number6 Months
Hard
Find Players With Zero or One Losses6 Months
Medium
Find Peak Element30 Days
Medium
Minimum Size Subarray Sum30 Days
Medium
Assign Cookies3 Months
Easy
Integer to English Words6 Months
Hard
Divide Two Integers3 Months
Medium
Apply Substitutions6 Months
Medium
Longest Nice Substring
Easy
Reverse Only Letters
Easy
Happy Number30 Days
Easy
Check if Array Is Sorted and Rotated3 Months
Easy
Is Graph Bipartite?6 Months
Medium
Find Customer Referee6 Months
Easy
String to Integer (atoi)6 Months
Medium
Remove All Adjacent Duplicates In String3 Months
Easy
Combinations6 Months
Medium
Replace Non-Coprime Numbers in Array6 Months
Hard
Count Odd Numbers in an Interval Range3 Months
Easy
Find Minimum in Rotated Sorted Array3 Months
Medium
Last Stone Weight6 Months
Easy
Maximum Population Year6 Months
Easy
Coin Change3 Months
Medium
Sudoku Solver30 Days
Hard
Matrix Diagonal Sum6 Months
Easy
Longest Consecutive Sequence30 Days
Medium
Continuous Subarray Sum6 Months
Medium
Remove Digit From Number to Maximize Result
Easy
Sum Root to Leaf Numbers6 Months
Medium
Summary Ranges3 Months
Easy
Length of Last Word30 Days
Easy
Design Linked List6 Months
Medium
Smallest Subtree with all the Deepest Nodes3 Months
Medium
Plus One30 Days
Easy
Minimum Time Difference
Medium
Lowest Common Ancestor of a Binary Search Tree6 Months
Medium
Find the Highest Altitude6 Months
Easy
Number of Substrings With Only 1s
Medium
Delete the Middle Node of a Linked List6 Months
Medium
Minimum Amount of Time to Collect Garbage6 Months
Medium
Lowest Common Ancestor of Deepest Leaves6 Months
Medium
Tallest Billboard3 Months
Hard
House Robber II3 Months
Medium
Remove Duplicates from Sorted Array30 Days
Easy
Maximum Beauty of an Array After Applying Operation
Medium
Add Two Integers3 Months
Easy
Minimum Interval to Include Each Query6 Months
Hard
Find Median from Data Stream3 Months
Hard
Path Crossing
Easy
Divide Array Into Equal Pairs
Easy
Employee Bonus3 Months
Easy
Insert into a Binary Search Tree3 Months
Medium
Minimum Time to Finish the Race3 Months
Hard
Palindrome Linked List30 Days
Easy
Deepest Leaves Sum
Medium
Maximum Product of Splitted Binary Tree3 Months
Medium
K-diff Pairs in an Array
Medium
Balanced Binary Tree3 Months
Easy
Defanging an IP Address6 Months
Easy
N-th Tribonacci Number3 Months
Easy
Height of Binary Tree After Subtree Removal Queries
Hard
Is Subsequence3 Months
Easy
Car Fleet
Medium
Number of Closed Islands6 Months
Medium
Sum of Unique Elements
Easy
Most Profitable Path in a Tree
Medium
Sum of Digits of String After Convert
Easy
Implement Queue using Stacks3 Months
Easy
Product Sales Analysis I3 Months
Easy
Cutting Ribbons
Medium
Interleaving String3 Months
Medium
Expression Add Operators3 Months
Hard
Minimum Falling Path Sum6 Months
Medium
Prefix and Suffix Search
Hard
Ugly Number II
Medium
Nearest Exit from Entrance in Maze
Medium
Count Pairs Whose Sum is Less than Target6 Months
Easy
Count Good Numbers3 Months
Medium
Number of Lines To Write String
Easy
3Sum Smaller
Medium
Add Two Numbers II
Medium
Cheapest Flights Within K Stops3 Months
Medium
Add Bold Tag in String
Medium
Word Pattern6 Months
Easy
Sentence Similarity III
Medium
The k-th Lexicographical String of All Happy Strings of Length n
Medium
Find Leaves of Binary Tree6 Months
Medium
Coin Change II30 Days
Medium
Convert a Number to Hexadecimal
Easy
Find Lucky Integer in an Array
Easy
Relative Ranks6 Months
Easy
Ugly Number3 Months
Easy
Find Bottom Left Tree Value
Medium
How Many Numbers Are Smaller Than the Current Number6 Months
Easy
Validate Binary Search Tree3 Months
Medium
Valid Word Abbreviation
Easy
Basic Calculator IV
Hard
Number of Ways to Split Array
Medium
Arranging Coins6 Months
Easy
Add Digits3 Months
Easy
Sort List3 Months
Medium
Create a DataFrame from List
Easy
Missing Element in Sorted Array
Medium
First Unique Character in a String3 Months
Easy
Minimum Cost to Equalize Array
Hard
Count Pairs That Form a Complete Day I
Easy
Shortest Unsorted Continuous Subarray
Medium
Populating Next Right Pointers in Each Node3 Months
Medium
Find Center of Star Graph
Easy
Maximum Points You Can Obtain from Cards6 Months
Medium
Minimum Common Value
Easy
Find And Replace in String30 Days
Medium
Smallest Sufficient Team
Hard
Campus Bikes
Medium
Vertical Order Traversal of a Binary Tree3 Months
Hard
Find Missing Observations
Medium
Buddy Strings
Easy
Paint Fence
Medium
Contains Duplicate II30 Days
Easy
Perfect Squares3 Months
Medium
Max Consecutive Ones3 Months
Easy
Remove Duplicate Letters
Medium
4Sum30 Days
Medium
Distinct Subsequences3 Months
Hard
Goal Parser Interpretation
Easy
Check if Word Can Be Placed In Crossword
Medium
Project Employees I
Easy
Minimum Moves to Spread Stones Over Grid
Medium
Add Strings3 Months
Easy
Long Pressed Name
Easy
Largest Triangle Area6 Months
Easy
Reverse Words in a String III
Easy
Remove Letter To Equalize Frequency3 Months
Easy
Count Number of Nice Subarrays
Medium
Optimal Partition of String
Medium
Best Time to Buy and Sell Stock III3 Months
Hard
Number of Submatrices That Sum to Target
Hard
Number of Subarrays That Match a Pattern I
Medium
Duplicate Emails6 Months
Easy
Convert Sorted Array to Binary Search Tree3 Months
Easy
Minimum Weighted Subgraph With the Required Paths
Hard
Soup Servings
Medium
Next Greater Node In Linked List6 Months
Medium
Search in Rotated Sorted Array II
Medium
Reverse Substrings Between Each Pair of Parentheses
Medium
Next Greater Element I3 Months
Easy
Minimum Obstacle Removal to Reach Corner
Hard
Intersection of Two Arrays II30 Days
Easy
Word Subsets
Medium
Count Nice Pairs in an Array6 Months
Medium
Design a Number Container System
Medium
Can Place Flowers3 Months
Easy
Best Time to Buy and Sell Stock with Cooldown6 Months
Medium
Minimum Cost to Make Array Equal
Hard
Flip String to Monotone Increasing6 Months
Medium
Power of Two3 Months
Easy
Largest Number At Least Twice of Others
Easy
Count Good Nodes in Binary Tree6 Months
Medium
Meeting Rooms III3 Months
Hard
Reorder Routes to Make All Paths Lead to the City Zero
Medium
Find the Winner of the Circular Game
Medium
Zuma Game6 Months
Hard
Split Array With Same Average
Hard
Minimum Cost to Make at Least One Valid Path in a Grid6 Months
Hard
Rotated Digits
Medium
Binary Tree Longest Consecutive Sequence
Medium
Exam Room
Medium
Dot Product of Two Sparse Vectors
Medium
Shuffle the Array30 Days
Easy
Reverse Integer30 Days
Medium
Longest Duplicate Substring3 Months
Hard
Excel Sheet Column Title3 Months
Easy
House Robber30 Days
Medium
Detonate the Maximum Bombs
Medium
Tree Diameter
Medium
Number of Longest Increasing Subsequence
Medium
Missing Number30 Days
Easy
Patching Array
Hard
Check If Two String Arrays are Equivalent
Easy
Champagne Tower30 Days
Medium
Shortest Path in a Hidden Grid
Medium
Target Sum6 Months
Medium
Degree of an Array6 Months
Easy
Longest Continuous Increasing Subsequence6 Months
Easy
Article Views I3 Months
Easy
Count Servers that Communicate
Medium
Sum of Beauty of All Substrings6 Months
Medium
Scramble String
Hard
Find the Longest Substring Containing Vowels in Even Counts
Medium
Number of Substrings Containing All Three Characters3 Months
Medium
Number of Flowers in Full Bloom
Hard
Odd Even Linked List6 Months
Medium
Sort Characters By Frequency6 Months
Medium
Count the Number of Good Subarrays
Medium
Range Sum of BST
Easy
Allow One Function Call
Easy
132 Pattern6 Months
Medium
Minimum Difference Between Largest and Smallest Value in Three Moves
Medium
Restore the Array From Adjacent Pairs
Medium
Department Top Three Salaries
Hard
Find Triangular Sum of an Array
Medium
Find Missing and Repeated Values3 Months
Easy
Sequence Reconstruction30 Days
Medium
Delete Duplicate Emails3 Months
Easy
Single Number II3 Months
Medium
Jewels and Stones6 Months
Easy
Step-By-Step Directions From a Binary Tree Node to Another
Medium
Number of Distinct Islands
Medium
Subsets30 Days
Medium
Max Area of Island3 Months
Medium
Consecutive Numbers Sum
Hard
Min Cost to Connect All Points6 Months
Medium
Number of Atoms
Hard
Spiral Matrix II6 Months
Medium
Count Different Palindromic Subsequences
Hard
Design File System
Medium
Find Score of an Array After Marking All Elements
Medium
Fruit Into Baskets30 Days
Medium
Path with Maximum Gold
Medium
Fizz Buzz3 Months
Easy
Intersection of Two Arrays3 Months
Easy
Minimum Fuel Cost to Report to the Capital
Medium
Fraction to Recurring Decimal6 Months
Medium
Relative Sort Array
Easy
Number of Good Pairs30 Days
Easy
Sort an Array3 Months
Medium
Water and Jug Problem
Medium
Strong Password Checker
Hard
Smallest String With Swaps
Medium
Length of Longest Subarray With at Most K Frequency
Medium
Delete Node in a Linked List3 Months
Medium
Flatten Binary Tree to Linked List
Medium
Non-decreasing Array
Medium
Count Nodes Equal to Average of Subtree
Medium
Next Greater Element III
Medium
Text Justification3 Months
Hard
Count Numbers with Unique Digits
Medium
Binary Tree Zigzag Level Order Traversal3 Months
Medium
Combination Sum II3 Months
Medium
Best Time to Buy and Sell Stock IV
Hard
Minimum Insertion Steps to Make a String Palindrome
Hard
Minimum Number of Pushes to Type Word I
Easy
Minimum Operations to Reduce an Integer to 0
Medium
Search Insert Position30 Days
Easy
Longest Palindromic Subsequence6 Months
Medium
Find First and Last Position of Element in Sorted Array3 Months
Medium
Sliding Puzzle
Hard
Stickers to Spell Word
Hard
Sort Array by Increasing Frequency
Easy
Number of Islands II
Hard
Function Composition
Easy
Design Browser History
Medium
Longest Mountain in Array
Medium
Maximum Number of Events That Can Be Attended6 Months
Medium
Unique Paths30 Days
Medium
Time Taken to Cross the Door3 Months
Hard
Next Greater Element II3 Months
Medium
Candy3 Months
Hard
01 Matrix6 Months
Medium
Minimum Moves to Equal Array Elements II
Medium
Find N Unique Integers Sum up to Zero6 Months
Easy
Widest Vertical Area Between Two Points Containing No Points
Easy
Keys and Rooms
Medium
Cousins in Binary Tree
Easy
Rotate String3 Months
Easy
Evaluate Reverse Polish Notation3 Months
Medium
Implement Rand10() Using Rand7()
Medium
Peak Index in a Mountain Array3 Months
Medium
Median Employee Salary
Hard
Word Squares
Hard
Letter Tile Possibilities
Medium
Generalized Abbreviation
Medium
Count Cells in Overlapping Horizontal and Vertical Substrings
Medium
Random Flip Matrix
Medium
Maximum Font to Fit a Sentence in a Screen
Medium
Minimum Increment Operations to Make Array Beautiful
Medium
Primary Department for Each Employee
Easy
Longest Word in Dictionary through Deleting
Medium
Change the Root of a Binary Tree
Medium
Range Sum of Sorted Subarray Sums
Medium
Fill a Special Grid
Medium
Count Positions on Street With Required Brightness
Medium
Maximum Frequency of an Element After Performing Operations II6 Months
Hard
Move Sub-Tree of N-Ary Tree
Hard
Create Hello World Function30 Days
Easy
Watering Plants II
Medium
Beautiful Arrangement II
Medium
Number of Valid Clock Times
Easy
Find Permutation
Medium
Increasing Triplet Subsequence6 Months
Medium
Expressive Words
Medium
Binary Search Tree Iterator6 Months
Medium
Maximum Number of Ways to Partition an Array
Hard
Number of Good Ways to Split a String
Medium
Sum of Prefix Scores of Strings
Hard
Design Compressed String Iterator
Easy
Loan Types
Easy
Maximum Number of Non-Overlapping Subarrays With Sum Equals Target
Medium
Find Kth Largest XOR Coordinate Value
Medium
License Key Formatting
Easy
Number of Stable Subsequences
Hard
Nth Digit6 Months
Medium
Maximum Length of Semi-Decreasing Subarrays
Medium
Get the Maximum Score
Hard
Minimum Cost to Set Cooking Time
Medium
Stone Game II
Medium
Longest Palindromic Subsequence After at Most K Operations
Medium
Rank Scores30 Days
Medium
Minimum Depth of Binary Tree
Easy
Game Play Analysis I
Easy
Balance a Binary Search Tree6 Months
Medium
Possible Bipartition
Medium
Calculate Compressed Mean
Easy
The Most Similar Path in a Graph
Hard
Ones and Zeroes6 Months
Medium
Count Pairs of Points With Distance k
Medium
Sender With Largest Word Count
Medium
Find the Most Competitive Subsequence
Medium
Longest Binary Subsequence Less Than or Equal to K
Medium
Minimum Speed to Arrive on Time
Medium
Maximum Subsequence Score
Medium
Count Special Subsequences
Medium
Binary Tree Level Order Traversal3 Months
Medium
Coin Path
Hard
Output Contest Matches
Medium
Arithmetic Subarrays
Medium
Delete Columns to Make Sorted II6 Months
Medium
Pizza With 3n Slices
Hard
Paths in Maze That Lead to Same Room
Medium
Maximal Score After Applying K Operations
Medium
Parallel Courses II
Hard
Bomb Enemy
Medium
Maximum Score From Removing Stones
Medium
Build a Matrix With Conditions
Hard
Linked List Components
Medium
Linked List Cycle30 Days
Easy
Tiling a Rectangle with the Fewest Squares
Hard
Flip Game
Easy
Sum of Imbalance Numbers of All Subarrays
Hard
Check if There is a Path With Equal Number of 0's And 1's
Medium
Longest Uploaded Prefix
Medium
Distinct Echo Substrings
Hard
Max Number of K-Sum Pairs6 Months
Medium
Maximum Score of a Good Subarray
Hard
Class Performance
Medium
Minimum Cost to Change the Final Value of Expression
Hard
Extract Kth Character From The Rope Tree
Easy
Max Value of Equation
Hard
Longest Uncommon Subsequence II
Medium
Maximum Number of Accepted Invitations
Medium
Check If String Is Transformable With Substring Sort Operations
Hard
Binary Tree Longest Consecutive Sequence II
Medium
Serialize and Deserialize N-ary Tree6 Months
Hard
Minimum Absolute Difference Queries
Medium
Closest Dessert Cost
Medium
Longest Palindrome3 Months
Easy
Bold Words in String
Medium
Alphabet Board Path
Medium
Design Video Sharing Platform
Hard
Minimum Add to Make Parentheses Valid6 Months
Medium
Map of Highest Peak
Medium
Divide Chocolate
Hard
Find the Difference of Two Arrays
Easy
Super Pow
Medium
Type of Triangle
Easy
Shortest Distance to Target Color
Medium
Maximum Frequency Stack
Hard
Teemo Attacking6 Months
Easy
Find the Maximum Sequence Value of Array
Hard
Magnetic Force Between Two Balls6 Months
Medium
Minesweeper
Medium
Number of Restricted Paths From First to Last Node
Medium
Remove Duplicates from Sorted List30 Days
Easy
Shuffle String3 Months
Easy
Last Moment Before All Ants Fall Out of a Plank
Medium
Iterator for Combination
Medium
Adjacent Increasing Subarrays Detection II6 Months
Medium
Convert Object to JSON String
Medium
Minimum Swaps to Group All 1's Together II
Medium
Range Sum Query - Immutable3 Months
Easy
Partition String
Medium
Erect the Fence II
Hard
Grid Game
Medium
Longest Non-Decreasing Subarray After Replacing at Most One Element30 Days
Medium
Number of Ways of Cutting a Pizza
Hard
Longest Common Suffix Queries
Hard
Count Complete Tree Nodes
Easy
K-th Smallest in Lexicographical Order
Hard
Recover Binary Search Tree30 Days
Medium
Find the Maximum Length of Valid Subsequence II
Medium
Maximize Total Cost of Alternating Subarrays
Medium
Find Customers With Positive Revenue this Year
Easy
The k Strongest Values in an Array
Medium
Smallest Subsequence of Distinct Characters
Medium
Inverse Coin Change6 Months
Medium
Correct a Binary Tree
Medium
Minimum Flips in Binary Tree to Get Result
Hard
Longest Word With All Prefixes
Medium
Cat and Mouse II
Hard
Number of Equivalent Domino Pairs3 Months
Easy
Minimum Lines to Represent a Line Chart
Medium
Fancy Sequence
Hard
Max Chunks To Make Sorted II
Hard
Remove All Ones With Row and Column Flips
Medium
Longest Common Subsequence Between Sorted Arrays
Medium
Contains Duplicate III3 Months
Hard
Queries on Number of Points Inside a Circle
Medium
Guess the Majority in a Hidden Array
Medium
Remove Interval
Medium
Maximum Average Subarray II
Hard
Minimum Distance to Type a Word Using Two Fingers
Hard
K Empty Slots
Hard
Minimum Number of Operations to Convert Time
Easy
Range Sum Query 2D - Mutable
Medium
Employee Free Time6 Months
Hard
Path with Maximum Probability
Medium
Swapping Nodes in a Linked List
Medium
Valid Mountain Array6 Months
Easy
Maximum Difference Between Even and Odd Frequency II
Hard
Kids With the Greatest Number of Candies6 Months
Easy
Russian Doll Envelopes30 Days
Hard
Path With Maximum Minimum Value6 Months
Medium
Count of Smaller Numbers After Self30 Days
Hard
Ant on the Boundary
Easy
Bulb Switcher3 Months
Medium
Create Maximum Number
Hard
Product Price at a Given Date3 Months
Medium
Minimum Cost to Cut a Stick
Hard
My Calendar III
Hard
Combination Sum IV6 Months
Medium
Minimum Deletions for At Most K Distinct Characters
Easy
Invert Binary Tree6 Months
Easy
Maximum Gap6 Months
Medium
Find Subsequence of Length K With the Largest Sum
Easy
Count the Number of Fair Pairs
Medium
Binary Tree Preorder Traversal
Easy
Zigzag Iterator
Medium
Find All People With Secret3 Months
Hard
Number of Subarrays with Bounded Maximum
Medium
Strobogrammatic Number II
Medium
Binary Subarrays With Sum3 Months
Medium
Factorial Trailing Zeroes6 Months
Medium
Classes With at Least 5 Students
Easy
Guess Number Higher or Lower
Easy
Number of Steps to Reduce a Number in Binary Representation to One
Medium
Matchsticks to Square
Medium
Strange Printer
Hard
Smallest Missing Integer Greater Than Sequential Prefix Sum6 Months
Easy
Merge Two 2D Arrays by Summing Values
Easy
Integer Break6 Months
Medium
Count Number of Pairs With Absolute Difference K
Easy
Plates Between Candles
Medium
Construct String With Repeat Limit
Medium
Minimum Difference in Sums After Removal of Elements
Hard
Threshold Majority Queries
Hard
Maximum Width of Binary Tree6 Months
Medium
Kth Ancestor of a Tree Node3 Months
Hard
Simple Bank System6 Months
Medium
Employees Earning More Than Their Managers30 Days
Easy
Valid Triangle Number
Medium
Power of Three
Easy
Find if Path Exists in Graph3 Months
Easy
Accounts Merge30 Days
Medium
Boats to Save People6 Months
Medium
Customers Who Never Order3 Months
Easy
Shortest Subarray to be Removed to Make Array Sorted6 Months
Medium
Strange Printer II
Hard
Counting Bits6 Months
Easy
Find the Original Typed String I
Easy
Find Pivot Index6 Months
Easy
Element Appearing More Than 25% In Sorted Array
Easy
Smallest Integer Divisible by K3 Months
Medium
Longest Balanced Substring II30 Days
Medium
Minimize Malware Spread
Hard
Maximum Candies Allocated to K Children
Medium
Filling Bookcase Shelves
Medium
Two Best Non-Overlapping Events3 Months
Medium
Design Search Autocomplete System6 Months
Hard
Remove Duplicates from Sorted List II6 Months
Medium
Design Twitter6 Months
Medium
Confirmation Rate3 Months
Medium
Cherry Pickup II
Hard
Nim Game3 Months
Easy
Binary Tree Coloring Game
Medium
Shortest Path to Get All Keys
Hard
Count of Range Sum
Hard
Search a 2D Matrix30 Days
Medium
Counter II6 Months
Easy
Keyboard Row
Easy
Count Primes6 Months
Medium
Minimum Cost to Merge Stones6 Months
Hard
Largest Divisible Subset6 Months
Medium
String Compression III
Medium
Count Palindromic Subsequences
Hard
Swap Nodes in Pairs3 Months
Medium
Kth Missing Positive Number3 Months
Easy
Freedom Trail
Hard
Minimum Operations to Make the Array Increasing
Easy
Return Length of Arguments Passed6 Months
Easy
Maximum Employees to Be Invited to a Meeting
Hard
Find the Minimum and Maximum Number of Nodes Between Critical Points
Medium
Surrounded Regions3 Months
Medium
Search in a Binary Search Tree
Easy
Shortest Path in a Grid with Obstacles Elimination6 Months
Hard
Maximum Score After Splitting a String
Easy
Check if the Rectangle Corner Is Reachable
Hard
Minimum Number of Taps to Open to Water a Garden
Hard
Different Ways to Add Parentheses
Medium
Subtree of Another Tree3 Months
Easy
Split Linked List in Parts
Medium
Number of Operations to Make Network Connected
Medium
Destroying Asteroids
Medium
Can I Win6 Months
Medium
The kth Factor of n6 Months
Medium
Partition Labels
Medium
Count Negative Numbers in a Sorted Matrix3 Months
Easy
Sum of Left Leaves
Easy
Flipping an Image
Easy
Most Stones Removed with Same Row or Column3 Months
Medium
Profitable Schemes
Hard
Maximum Product of Word Lengths
Medium
Hand of Straights
Medium
Largest Values From Labels
Medium
Game Play Analysis IV3 Months
Medium
Percentage of Users Attended a Contest6 Months
Easy
Maximum Matrix Sum3 Months
Medium
Sum of Distances in Tree6 Months
Hard
Unique Number of Occurrences3 Months
Easy
Construct Binary Search Tree from Preorder Traversal3 Months
Medium
Separate Black and White Balls
Medium
Lexicographically Smallest Palindrome
Easy
Find Target Indices After Sorting Array6 Months
Easy
Parsing A Boolean Expression
Hard
Smallest String Starting From Leaf
Medium
Find in Mountain Array3 Months
Hard
Replace Employee ID With The Unique Identifier3 Months
Easy
Shifting Letters
Medium
Remove Outermost Parentheses3 Months
Easy
Min Cost Climbing Stairs6 Months
Easy
Find the Maximum Number of Elements in Subset
Medium
Task Scheduler II
Medium
Construct Binary Tree from Preorder and Inorder Traversal6 Months
Medium
Find the Difference6 Months
Easy
Richest Customer Wealth6 Months
Easy
Human Traffic of Stadium3 Months
Hard
Longest Substring with At Least K Repeating Characters3 Months
Medium
Single Number30 Days
Easy
Counter3 Months
Easy
Lexicographically Minimum String After Removing Stars
Medium
Merge Nodes in Between Zeros
Medium
Maximum Unique Subarray Sum After Deletion
Easy
Binary Tree Level Order Traversal II
Medium
Third Maximum Number30 Days
Easy
Merge In Between Linked Lists
Medium
Kth Smallest Number in Multiplication Table
Hard
Words Within Two Edits of Dictionary
Medium
Find Minimum Operations to Make All Elements Divisible by Three6 Months
Easy
Set Mismatch3 Months
Easy
Repeated Substring Pattern6 Months
Easy
Closest Binary Search Tree Value
Easy
Minimum White Tiles After Covering With Carpets
Hard
Meeting Rooms6 Months
Easy
Maximum Average Pass Ratio6 Months
Medium
Delete Columns to Make Sorted III
Hard
Cache With Time Limit6 Months
Medium
Find Common Elements Between Two Arrays
Easy
Pascal's Triangle II30 Days
Easy
Repeated String Match
Medium
Maximum Average Subarray I30 Days
Easy
Maximum Size Subarray Sum Equals k
Medium
Count the Number of Substrings With Dominant Ones6 Months
Medium
Repeated DNA Sequences
Medium
Read N Characters Given read4 II - Call Multiple Times
Hard
Minimum Path Cost in a Hidden Grid
Medium
Design a Text Editor3 Months
Hard
Design an Ordered Stream
Easy
Plus One Linked List
Medium
Minimize Max Distance to Gas Station
Hard
2 Keys Keyboard
Medium
Shortest Subarray with Sum at Least K
Hard
Custom Sort String
Medium
Binary Tree Inorder Traversal30 Days
Easy
Subarray Sums Divisible by K3 Months
Medium
Single-Threaded CPU
Medium
Find Elements in a Contaminated Binary Tree
Medium
Find Words Containing Character6 Months
Easy
Evaluate Boolean Binary Tree
Easy
Friend Requests II: Who Has the Most Friends
Medium
Minimum Number of Changes to Make Binary String Beautiful
Medium
Unique Length-3 Palindromic Subsequences
Medium
Continuous Subarrays
Medium
Find the Lexicographically Largest String From the Box I
Medium
Verify Preorder Serialization of a Binary Tree
Medium
Robot Room Cleaner
Hard
Wiggle Sort II6 Months
Medium
Most Profit Assigning Work
Medium
Minimum Array Sum
Medium
Count Items Matching a Rule
Easy
Put Marbles in Bags
Hard
Calculate Money in Leetcode Bank6 Months
Easy
Lexicographical Numbers6 Months
Medium
Lowest Common Ancestor of a Binary Tree III6 Months
Medium
Buildings With an Ocean View
Medium
Convert Integer to the Sum of Two No-Zero Integers6 Months
Easy
Max Consecutive Ones II
Medium
Partition List3 Months
Medium
Score of a String6 Months
Easy
Arithmetic Slices3 Months
Medium
Largest Sum of Averages
Medium
24 Game6 Months
Hard
Minimum Unique Word Abbreviation
Hard
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Medium
Strong Friendship3 Months
Medium
Count the Number of Special Characters II
Medium
Rearranging Fruits
Hard
H-Index6 Months
Medium
Number of Enclaves
Medium
First Letter to Appear Twice
Easy
Booking Concert Tickets in Groups
Hard
Camelcase Matching
Medium
Maximum Number of Points From Grid Queries
Hard
Cracking the Safe
Hard
K-Similar Strings
Hard
Sort Array by Moving Items to Empty Space
Hard
Find Expensive Cities
Easy
Maximum XOR With an Element From Array
Hard
Minimum Time to Build Blocks
Hard
Meeting Scheduler
Medium
Count Integers in Intervals
Hard
Optimize Water Distribution in a Village
Hard
Find Champion I
Easy
Tree of Coprimes
Hard
Count the Number of Good Partitions
Hard
Binary Tree Vertical Order Traversal
Medium
Maximum Nesting Depth of the Parentheses
Easy
Array of Doubled Pairs
Medium
Maximum Difference Between Even and Odd Frequency I
Easy
Image Overlap
Medium
Replace All Digits with Characters
Easy
Smallest Index With Equal Value
Easy
Positions of Large Groups
Easy
Get the Size of a DataFrame
Easy
My Calendar II3 Months
Medium
Minimum Skips to Arrive at Meeting On Time
Hard
Least Number of Unique Integers after K Removals
Medium
Lonely Pixel II
Medium
Maximize Consecutive Elements in an Array After Modification
Hard
Rings and Rods
Easy
Number of Unique Good Subsequences
Hard
Maximum Non Negative Product in a Matrix
Medium
Maximize Sum Of Array After K Negations
Easy
Online Election
Medium
Maximum Split of Positive Even Integers
Medium
Minimize Maximum Value in a Grid
Hard
Minimum Number of Operations to Move All Balls to Each Box6 Months
Medium
First Bad Version3 Months
Easy
Maximum Number of Events That Can Be Attended II
Hard
Minimum Cost to Connect Two Groups of Points
Hard
Not Boring Movies3 Months
Easy
House Robber IV
Medium
Count Ways to Distribute Candies
Hard
Maximum Number That Sum of the Prices Is Less Than or Equal to K
Medium
Change Minimum Characters to Satisfy One of Three Conditions
Medium
Minimum Pair Removal to Sort Array I3 Months
Easy
Smallest Rectangle Enclosing Black Pixels
Hard
Number of Ways to Rearrange Sticks With K Sticks Visible
Hard
Number of Equal Numbers Blocks
Medium
Similar RGB Color
Easy
Count Pairs of Equal Substrings With Minimum Difference
Medium
Random Point in Non-overlapping Rectangles
Medium
Find Positive Integer Solution for a Given Equation
Medium
Make Number of Distinct Characters Equal
Medium
Range Addition
Medium
Convex Polygon
Medium
Binary Search30 Days
Easy
Jump Game VII
Medium
Path Sum3 Months
Easy
Find the Subtasks That Did Not Execute
Hard
Valid Word Square
Easy
People Whose List of Favorite Companies Is Not a Subset of Another List
Medium
Minimum Cost to Reach Destination in Time
Hard
Minimum Number of Increments on Subarrays to Form a Target Array6 Months
Hard
Determine if a Cell Is Reachable at a Given Time
Medium
Minimum Operations to Make Array Equal to Target
Hard
Finding the Number of Visible Mountains
Medium
Identify the Largest Outlier in an Array
Medium
Find Maximum Non-decreasing Array Length
Hard
Longest Balanced Subarray II30 Days
Hard
Count Prefixes of a Given String
Easy
Complete Binary Tree Inserter
Medium
Amount of New Area Painted Each Day
Hard
Perfect Number30 Days
Easy
Reordered Power of 2
Medium
Maximum Performance of a Team
Hard
Shortest Completing Word
Easy
Minimum Sum of Values by Dividing Array
Hard
Minimum Number of Operations to Reinitialize a Permutation
Medium
Largest Submatrix With Rearrangements
Medium
Max Sum of Rectangle No Larger Than K
Hard
Maximize Subarray GCD Score
Hard
Frequency of the Most Frequent Element3 Months
Medium
All Paths from Source Lead to Destination
Medium
Remove Comments
Medium
Count Houses in a Circular Street
Easy
Shortest Impossible Sequence of Rolls
Hard
Three Divisors6 Months
Easy
Minimum Insertions to Balance a Parentheses String
Medium
Top Three Wineries
Hard
Count Subarrays With More Ones Than Zeros
Medium
Find Nearest Right Node in Binary Tree
Medium
Count Words Obtained After Adding a Letter
Medium
Amount of Time for Binary Tree to Be Infected
Medium
Binary Tree Nodes
Medium
Ambiguous Coordinates
Medium
Brace Expansion II
Hard
Sparse Matrix Multiplication
Medium
Maximum Number of Operations With the Same Score I
Easy
All Divisions With the Highest Score of a Binary Array
Medium
Transform to Chessboard
Hard
Find the Celebrity
Medium
Count Asterisks
Easy
Sentence Screen Fitting
Medium
Find Latest Group of Size M
Medium
Paint House
Medium
Wiggle Sort
Medium
Valid Parenthesis String3 Months
Medium
Insert into a Sorted Circular Linked List
Medium
Big Countries3 Months
Easy
Sum of Good Subsequences6 Months
Hard
Closest Nodes Queries in a Binary Search Tree
Medium
Count Fertile Pyramids in a Land
Hard
Kth Smallest Product of Two Sorted Arrays6 Months
Hard
Merge Triplets to Form Target Triplet
Medium
Encode String with Shortest Length
Hard
Sum of Mutated Array Closest to Target
Medium
Number of Beautiful Partitions
Hard
Checking Existence of Edge Length Limited Paths
Hard
Number of Good Paths
Hard
Most Frequent Prime
Medium
Sum of Subarray Ranges
Medium
Strobogrammatic Number
Easy
Process Restricted Friend Requests
Hard
Find the Maximum Achievable Number6 Months
Easy
Ransom Note30 Days
Easy
Minimum Sensors to Cover Grid
Medium
Confusing Number
Easy
Remove All Ones With Row and Column Flips II
Medium
Confusing Number II
Hard
Check If Two Expression Trees are Equivalent
Medium
Check if DFS Strings Are Palindromes
Hard
Kth Smallest Subarray Sum
Medium
Decrease Elements To Make Array Zigzag
Medium
Number of Ways to Stay in the Same Place After Some Steps
Hard
Maximum Score After Applying Operations on a Tree
Medium
Minimum Number of Days to Eat N Oranges
Hard
Binary String With Substrings Representing 1 To N
Medium
Pyramid Transition Matrix3 Months
Medium
Valid Square
Medium
Latest Time You Can Obtain After Replacing Characters
Easy
Partition Array According to Given Pivot
Medium
Find Two Non-overlapping Sub-arrays Each With Target Sum
Medium
Max Pair Sum in an Array
Easy
Longest Chunked Palindrome Decomposition
Hard
Most Frequent Number Following Key In an Array
Easy
Max Dot Product of Two Subsequences3 Months
Hard
Longest Increasing Subsequence II
Hard
Rotate List6 Months
Medium
Nested List Weight Sum6 Months
Medium
Find the Safest Path in a Grid3 Months
Medium
Merge Similar Items
Easy
Student Attendance Record I
Easy
Rearrange Spaces Between Words
Easy
Longest Subsequence Repeated k Times
Hard
String Transforms Into Another String
Hard
Minimum Cost to Make Array Equalindromic
Medium
Distribute Repeating Integers
Hard
Lonely Pixel I
Medium
Sentence Similarity6 Months
Easy
Recover the Original Array
Hard
Determine if Two Events Have Conflict
Easy
Find All Lonely Numbers in the Array
Medium
Maximum Number of Groups Getting Fresh Donuts
Hard
Minimum Time to Remove All Cars Containing Illegal Goods
Hard
Check if Grid can be Cut into Sections
Medium
Check if There Is a Valid Parentheses String Path
Hard
Running Sum of 1d Array30 Days
Easy
Count Caesar Cipher Pairs6 Months
Medium
Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree
Hard
Equal Rational Numbers
Hard
Maximum Score of a Node Sequence6 Months
Hard
All People Report to the Given Manager
Medium
Remove Duplicates from Sorted Array II30 Days
Medium
Path Existence Queries in a Graph I
Medium
Number of Ways to Reorder Array to Get Same BST
Hard
Predict the Winner6 Months
Medium
Flatten Nested List Iterator6 Months
Medium
Decompress Run-Length Encoded List
Easy
Maximum Score from Performing Multiplication Operations
Hard
Occurrences After Bigram
Easy
Minimum Path Cost in a Grid
Medium
Integer Replacement
Medium
Find Anagram Mappings
Easy
Mean of Array After Removing Some Elements
Easy
Number of Steps to Reduce a Number to Zero6 Months
Easy
Find Eventual Safe States3 Months
Medium
Split Two Strings to Make Palindrome
Medium
Count Hills and Valleys in an Array
Easy
Count K-Subsequences of a String With Maximum Beauty
Hard
To Be Or Not To Be3 Months
Easy
Distance Between Bus Stops
Easy
Largest Subarray Length K
Easy
Where Will the Ball Fall
Medium
Divide Array Into Increasing Sequences
Hard
Number of Boomerangs
Medium
Compare Strings by Frequency of the Smallest Character
Medium
Simplified Fractions
Medium
Spiral Matrix III
Medium
Find the Count of Monotonic Pairs I
Hard
Form Largest Integer With Digits That Add up to Target
Hard
Latest Time by Replacing Hidden Digits
Easy
Next Closest Time
Medium
DI String Match
Easy
Longest Line of Consecutive One in Matrix
Medium
Redundant Connection6 Months
Medium
Count Number of Distinct Integers After Reverse Operations
Medium
Disconnect Path in a Binary Matrix by at Most One Flip
Medium
Sort Integers by The Power Value6 Months
Medium
Flip Game II
Medium
Campus Bikes II
Medium
Minimize Product Sum of Two Arrays
Medium
Minimum Operations to Convert Number
Medium
Maximum AND Sum of Array
Hard
Find the Minimum Number of Fibonacci Numbers Whose Sum Is K
Medium
Single-Row Keyboard
Easy
Design Phone Directory
Medium
Maximum Value of K Coins From Piles
Hard
Minimum Time Visiting All Points3 Months
Easy
Longest Uncommon Subsequence I
Easy
Special Array With X Elements Greater Than or Equal X
Easy
Reach End of Array With Max Score
Medium
Minimum Time to Visit a Cell In a Grid
Hard
Largest Color Value in a Directed Graph
Hard
Trionic Array II30 Days
Hard
XOR Queries of a Subarray
Medium
Solving Questions With Brainpower
Medium
Find Right Interval
Medium
Minimum Removals to Balance Array30 Days
Medium
Maximum Matching of Players With Trainers
Medium
Encrypt and Decrypt Strings
Hard
Minimum Cost to Hire K Workers
Hard
Minimum Operations to Make Array Values Equal to K
Easy
Delete Nodes From Linked List Present in Array6 Months
Medium
Count Sorted Vowel Strings
Medium
Sort Array By Parity II3 Months
Easy
Coloring A Border3 Months
Medium
Sum of Distances
Medium
Longest Subarray With Maximum Bitwise AND
Medium
Find the K-th Character in String Game I
Easy
Similar String Groups
Hard
Divide an Array Into Subarrays With Minimum Cost I30 Days
Easy
Trim a Binary Search Tree3 Months
Medium
Find the Punishment Number of an Integer
Medium
Apply Transform Over Each Element in Array6 Months
Easy
Minimum Operations to Make the Integer Zero6 Months
Medium
Distribute Candies
Easy
Total Characters in String After Transformations II
Hard
Group Sold Products By The Date6 Months
Easy
Maximum Score Words Formed by Letters
Hard
Path Existence Queries in a Graph II
Hard
Maximum Value of an Ordered Triplet I
Easy
Implement Magic Dictionary
Medium
Stream of Characters
Hard
Design Movie Rental System
Hard
Maximum Square Area by Removing Fences From a Field3 Months
Medium
Sort Vowels in a String
Medium
Gray Code6 Months
Medium
Largest Combination With Bitwise AND Greater Than Zero
Medium
Zero Array Transformation IV
Medium
Maximum Number of Words Found in Sentences
Easy
Maximum Sum of 3 Non-Overlapping Subarrays
Hard
Flip Equivalent Binary Trees
Medium
Valid Boomerang
Easy
Find Maximum Removals From Source String
Medium
Find Mirror Score of a String
Medium
Find the Shortest Superstring
Hard
Fill Missing Data
Easy
Keep Multiplying Found Values by Two6 Months
Easy
Find Most Frequent Vowel and Consonant6 Months
Easy
Check If All 1's Are at Least Length K Places Away6 Months
Easy
Egg Drop With 2 Eggs and N Floors
Medium
Move Pieces to Obtain a String30 Days
Medium
Biggest Single Number
Easy
Find the Maximum Number of Fruits Collected
Hard
Redundant Connection II
Hard
Mirror Reflection
Medium
Number of Senior Citizens
Easy
Minimum Number Game3 Months
Easy
Find Smallest Letter Greater Than Target
Easy
Queries Quality and Percentage
Easy
Subsequence Sum After Capping Elements6 Months
Medium
Balanced K-Factor Decomposition
Medium
Minimum Domino Rotations For Equal Row
Medium
Buy Two Chocolates
Easy
Check Completeness of a Binary Tree
Medium
Shortest Path Visiting All Nodes6 Months
Hard
Adding Spaces to a String
Medium
Maximum Absolute Sum of Any Subarray
Medium
Determine Whether Matrix Can Be Obtained By Rotation
Easy
Make Array Non-decreasing
Medium
Minimum Time to Repair Cars
Medium
Reverse String II30 Days
Easy
Check If Digits Are Equal in String After Operations II
Hard
Merge BSTs to Create Single BST
Hard
Separate Squares II3 Months
Hard
Minimum Cost Walk in Weighted Graph
Hard
Employees Whose Manager Left the Company
Easy
Delete Greatest Value in Each Row
Easy
Find a Safe Walk Through a Grid
Medium
Arithmetic Slices II - Subsequence
Hard
Count Number of Trapezoids II3 Months
Hard
Twisted Mirror Path Count
Medium
Maximum Subarray Sum With Length Divisible by K3 Months
Medium
Longest Balanced Substring I30 Days
Medium
Reschedule Meetings for Maximum Free Time I
Medium
Number of Unique Subjects Taught by Each Teacher
Easy
Partition Array Such That Maximum Difference Is K
Medium
Two-Letter Card Game6 Months
Medium
Jump Game VI6 Months
Medium
Maximum Vacation Days
Hard
Count Submatrices With All Ones
Medium
Maximum Total from Optimal Activation Order
Medium
Hash Divided String
Medium
Total Waviness of Numbers in Range I3 Months
Medium
Count Special Quadruplets
Easy
Uncommon Words from Two Sentences
Easy
Minimum Cost to Convert String II
Hard
Find Champion II
Medium
Count The Number of Winning Sequences
Hard
Count All Valid Pickup and Delivery Options
Hard
Partition Array to Minimize XOR
Medium
Rotate Function
Medium
Sum of All Subset XOR Totals
Easy
Filter Elements from Array
Easy
Find if Array Can Be Sorted
Medium
Frog Jump II
Medium
Check if the Sentence Is Pangram6 Months
Easy
Naming a Company
Hard
Maximum Number of Distinct Elements After Operations6 Months
Medium
Lexicographically Smallest Equivalent String
Medium
Zero Array Transformation I
Medium
Count the Number of Computer Unlocking Permutations3 Months
Medium
Stone Game III
Hard
Minimum Pair Removal to Sort Array II
Hard
Corporate Flight Bookings
Medium
Maximize the Confusion of an Exam
Medium
Design Auction System3 Months
Medium
Final Array State After K Multiplication Operations II
Hard
Inorder Successor in BST II
Medium
Zero Array Transformation III
Medium
Patients With a Condition
Easy
Find the Pivot Integer
Easy
Find Nearest Point That Has the Same X or Y Coordinate
Easy
Minimum Number of Moves to Seat Everyone
Easy
Split a String Into the Max Number of Unique Substrings
Medium
Find the Divisibility Array of a String
Medium
Array Prototype Last3 Months
Easy
Smallest Range I
Easy
Check If N and Its Double Exist
Easy
Take Gifts From the Richest Pile
Easy
Is Object Empty
Easy
Finding 3-Digit Even Numbers
Easy
Minimize String Length
Easy
Take K of Each Character From Left and Right
Medium
Valid Phone Numbers6 Months
Easy
Count Number of Maximum Bitwise-OR Subsets
Medium
Find the Maximum Sum of Node Values
Hard
Find Longest Special Substring That Occurs Thrice I
Medium
Number of Common Factors
Easy
Maximum Containers on a Ship
Easy
Knight Dialer
Medium
Word Frequency
Medium
Sort Array By Parity3 Months
Easy
Sort Items by Groups Respecting Dependencies
Hard
Stone Game VII
Medium
Find Missing Elements30 Days
Easy
Prime Subtraction Operation
Medium
Find the Number of Distinct Colors Among the Balls
Medium
Actors and Directors Who Cooperated At Least Three Times
Easy
Count Non-Decreasing Subarrays After K Operations
Hard
Ways to Express an Integer as Sum of Powers
Medium
Process String with Special Operations II
Hard
Recover a Tree From Preorder Traversal
Hard
Check If a String Contains All Binary Codes of Size K
Medium
Maximize Happiness of Selected Children
Medium
Minimum Swaps to Make Strings Equal
Medium
Can Make Arithmetic Progression From Sequence30 Days
Easy
Prime In Diagonal
Easy
Number of Segments in a String
Easy
Count Covered Buildings3 Months
Medium
Select Data
Easy
Transformed Array3 Months
Easy
Strictly Palindromic Number3 Months
Medium
Vowels Game in a String
Medium
Maximize the Minimum Powered City6 Months
Hard
Minimum Cost to Make Arrays Identical
Medium
Maximum Product of the Length of Two Palindromic Subsequences
Medium
Count Substrings With K-Frequency Characters I
Medium
Neighboring Bitwise XOR
Medium
Detect Squares6 Months
Medium
Trionic Array I30 Days
Easy
Perfect Rectangle
Hard
Longest Happy Prefix
Hard
Smallest Index With Digit Sum Equal to Index6 Months
Easy
Print Zero Even Odd
Medium
Super Ugly Number
Medium
Maximum Odd Binary Number
Easy
Best Time to Buy and Sell Stock V3 Months
Medium
Minimum Deletions to Make String K-Special
Medium
Maximum Number of Moves in a Grid
Medium
Find the Maximum Length of Valid Subsequence I
Medium
Find Building Where Alice and Bob Can Meet
Hard
Minimum Window Subsequence
Hard
Minimum Number of Operations to Make All Array Elements Equal to 13 Months
Medium
Minimum Index of a Valid Split
Medium
Map Sum Pairs
Medium
Count Number of Bad Pairs
Medium
Find X-Sum of All K-Long Subarrays II6 Months
Hard
Minimum Total Distance Traveled
Hard
Tenth Line
Easy
Removing Stars From a String
Medium
Minimum Operations to Make Array Sum Divisible by K3 Months
Easy
Count Collisions on a Road
Medium
Longest Palindrome by Concatenating Two Letter Words
Medium
Binary Prefix Divisible By 5
Easy
Partition String Into Substrings With Values at Most K
Medium
Check if Matrix Is X-Matrix
Easy
Increasing Order Search Tree
Easy
Find the Power of K-Size Subarrays I
Medium
Increment Submatrices by One
Medium
Maximum Star Sum of a Graph
Medium
Zero Array Transformation II
Medium
Increasing Decreasing String
Easy
Split Array With Minimum Difference
Medium
Super Washing Machines
Hard
Reveal Cards In Increasing Order
Medium
Maximum Number of K-Divisible Components3 Months
Hard
Range Module30 Days
Hard
Maximum Subarray With Equal Products6 Months
Easy
Count the Number of Special Characters I
Easy
Find the Count of Good Integers
Hard
Adjacent Increasing Subarrays Detection I6 Months
Easy
Numbers With Repeated Digits
Hard
The Two Sneaky Numbers of Digitville6 Months
Easy
Count Bowl Subarrays6 Months
Medium
Kth Distinct String in an Array
Easy
Count Subarrays Where Max Element Appears at Least K Times
Medium
Push Dominoes
Medium
Fix Names in a Table
Easy
Minimum Falling Path Sum II
Hard
Find the XOR of Numbers Which Appear Twice
Easy
Binary Watch30 Days
Easy
Maximum Level Sum of a Binary Tree3 Months
Medium
Create Sorted Array through Instructions
Hard
Sum of Absolute Differences in a Sorted Array
Medium
Cousins in Binary Tree II
Medium
Sort the People
Easy
Jump Game IV
Hard
Transpose File
Medium
Find the Middle Index in Array
Easy
Check if Number is a Sum of Powers of Three6 Months
Medium
Minimum Array Changes to Make Differences Equal
Medium
N-ary Tree Preorder Traversal
Easy
Reach a Number
Medium
Make Array Zero by Subtracting Equal Amounts
Easy
Sleep6 Months
Easy
Dinner Plate Stacks
Hard
Maximize Alternating Sum Using Swaps
Hard
Constrained Subsequence Sum
Hard
Maximum Twin Sum of a Linked List6 Months
Medium
Painting a Grid With Three Different Colors
Hard
Find X-Sum of All K-Long Subarrays I
Easy
Maximum Area of Longest Diagonal Rectangle
Easy
Find Largest Value in Each Tree Row
Medium
Binary Tree Postorder Traversal
Easy
Count of Matches in Tournament6 Months
Easy
Delete Columns to Make Sorted3 Months
Easy
Maximum Possible Number by Binary Concatenation
Medium
Total Appeal of A String
Hard
Numbers With Same Consecutive Differences
Medium
Check if One String Swap Can Make Strings Equal
Easy
Find the Minimum Amount of Time to Brew Potions
Medium
The K Weakest Rows in a Matrix
Easy
Count Prefix and Suffix Pairs I
Easy
Length of the Longest Valid Substring
Hard
Highest Grade For Each Student
Medium
Maximum Running Time of N Computers3 Months
Hard
Promise Time Limit
Medium
Insert Greatest Common Divisors in Linked List
Medium
Average of Levels in Binary Tree
Easy
Maximum Difference by Remapping a Digit
Easy
Sum of Squares of Special Elements
Easy
Change Data Type
Easy
Modify Graph Edge Weights
Hard
Divide a String Into Groups of Size k
Easy
Reshape Data: Concatenate
Easy
Calculate Special Bonus
Easy
Flatten a Multilevel Doubly Linked List30 Days
Medium
Stone Game
Medium
Append K Integers With Minimal Sum
Medium
Array Reduce Transformation
Easy
Find the Number of Good Pairs I
Easy
Longest Absolute File Path
Medium
Longest Turbulent Subarray3 Months
Medium
Projection Area of 3D Shapes
Easy
Cat and Mouse
Hard
Maximum Frequency After Subarray Operation
Medium
Second Minimum Time to Reach Destination
Hard
Generate a String With Characters That Have Odd Counts
Easy
Sort the Jumbled Numbers
Medium
Count Symmetric Integers
Easy
Maximum XOR Score Subarray Queries
Hard
Find All Good Strings
Hard
Parse Lisp Expression
Hard
Smallest Divisible Digit Product II
Hard
Count Special Triplets3 Months
Medium
RLE Iterator3 Months
Medium
Spiral Matrix IV
Medium
Find All K-Distant Indices in an Array
Easy
Maximum Distance Between a Pair of Values
Medium
Data Stream as Disjoint Intervals
Hard
Array Nesting
Medium
Minimum Operations to Make a Subsequence
Hard
Maximum Value of a String in an Array
Easy
Maximum Nesting Depth of Two Valid Parentheses Strings
Medium
Convert Date to Binary
Easy
Complement of Base 10 Integer
Easy
Build an Array With Stack Operations6 Months
Medium
Water Bottles II
Medium
Minimum Number of Flips to Make Binary Grid Palindromic II
Medium
Distinct Subsequences II
Hard
X of a Kind in a Deck of Cards30 Days
Easy
Convert BST to Greater Tree
Medium
Minimum Number of People to Teach6 Months
Medium
Chunk Array
Easy
Implement Router
Medium
Check Knight Tour Configuration
Medium
Movement of Robots
Medium
Find Nth Smallest Integer With K One Bits30 Days
Hard
Reschedule Meetings for Maximum Free Time II
Medium
Rank Transform of a Matrix
Hard
Find the Number of Winning Players6 Months
Easy
Delete Operation for Two Strings
Medium
Count Residue Prefixes3 Months
Easy
Number of Subsequences That Satisfy the Given Sum Condition
Medium
N-ary Tree Level Order Traversal
Medium
Cells with Odd Values in a Matrix
Easy
Merge Operations for Minimum Travel Time
Hard
Seat Reservation Manager
Medium
Generate Binary Strings Without Adjacent Zeros
Medium
Bank Account Summary II
Easy
Count Distinct Integers After Removing Zeros6 Months
Medium
Smallest Number With All Set Bits6 Months
Easy
Largest Odd Number in String
Easy
Elimination Game
Medium
Concatenate Non-Zero Digits and Multiply by Sum II3 Months
Medium
Contain Virus
Hard
Smallest Good Base
Hard
Method Chaining
Easy
Convert 1D Array Into 2D Array
Easy
Maximize Active Section with Trade I
Medium
Maximize Subarrays After Removing One Conflicting Pair
Hard
Minimum Number of Vertices to Reach All Nodes
Medium
Maximum Product Difference Between Two Pairs
Easy
Number of Wonderful Substrings
Medium
Most Common Word
Easy
Find Students Who Improved
Medium
K-Concatenation Maximum Sum6 Months
Medium
Number of Ways to Paint N × 3 Grid3 Months
Hard
Solve the Equation
Medium
Maximum Difference Between Adjacent Elements in a Circular Array
Easy
Construct Binary Tree from Preorder and Postorder Traversal
Medium
Longest Special Path II
Hard
Maximum Difference Between Increasing Elements
Easy
Number of Distinct Islands II
Hard
Eliminate Maximum Number of Monsters
Medium
Number of Dice Rolls With Target Sum
Medium
Minimum Recolors to Get K Consecutive Black Blocks
Easy
Duplicate Zeros
Easy
Make Array Elements Equal to Zero6 Months
Easy
Count the Number of Complete Components
Medium
Partition Array for Maximum XOR and AND
Hard
Number of Smooth Descent Periods of a Stock3 Months
Medium
Count The Repetitions
Hard
Construct the Rectangle
Easy
Reformat Department Table
Easy
Bitwise AND of Numbers Range
Medium
Maximum Number of Fish in a Grid
Medium
Number of Pairs Satisfying Inequality
Hard
Separate Squares I30 Days
Medium
Minimum Swaps to Sort by Digit Sum
Medium
N-ary Tree Postorder Traversal
Easy
Special Positions in a Binary Matrix
Easy
Construct Smallest Number From DI String
Medium
Sum of Digits in Base K
Easy
Find Total Time Spent by Each Employee
Easy
Find Longest Awesome Substring
Hard
Append Characters to String to Make Subsequence
Medium
Maximum Length of a Concatenated String with Unique Characters
Medium
Reducing Dishes
Hard
Remove Nodes From Linked List
Medium
Magic Squares In Grid3 Months
Medium
Search in a Sorted Array of Unknown Size
Medium
Distinct Prime Factors of Product of Array
Medium
Find COVID Recovery Patients3 Months
Medium
Nested List Weight Sum II
Medium
Reverse Degree of a String
Easy
Maximum XOR of Two Numbers in an Array6 Months
Medium
Check if All Characters Have Equal Number of Occurrences
Easy
Shortest Distance to a Character
Easy
Sort By
Easy
Minimum Number of Days to Disconnect Island
Hard
Coupon Code Validator
Easy
Find the Lexicographically Smallest Valid Sequence
Medium
Shift Distance Between Two Strings
Medium
Count Triplets That Can Form Two Arrays of Equal XOR
Medium
Convert the Temperature
Easy
Find Number of Coins to Place in Tree Nodes
Hard
Minimum Average of Smallest and Largest Elements
Easy
Counting Words With a Given Prefix
Easy
Minimum Operations to Convert All Elements to Zero6 Months
Medium
Partition Array Into K-Distinct Groups6 Months
Medium
Find the Kth Largest Integer in the Array
Medium
Maximum Coins From K Consecutive Bags
Medium
Longest Palindrome After Substring Concatenation II
Hard
Minimize the Maximum Edge Weight of Graph
Medium
Stone Game V
Hard
Count Substrings That Satisfy K-Constraint I
Easy
Count Pairs That Form a Complete Day II
Medium
Minimum Moves to Move a Box to Their Target Location6 Months
Hard
Card Flipping Game
Medium
Binary Trees With Factors
Medium
Maximum Sum of Subsequence With Non-adjacent Elements
Hard
K-th Nearest Obstacle Queries
Medium
Largest Component Size by Common Factor
Hard
Allocate Mailboxes
Hard
Minimize XOR
Medium
Fruits Into Baskets III
Medium
Count Elements With Strictly Smaller and Greater Elements
Easy
Robot Return to Origin
Easy
Number of Squareful Arrays
Hard
Read N Characters Given Read4
Easy
Count Partitions with Even Sum Difference
Easy
Closest Node to Path in Tree
Hard
Array Partition
Easy
Build Array Where You Can Find The Maximum Exactly K Comparisons
Hard
The Latest Time to Catch a Bus6 Months
Medium
Find Minimum Cost to Remove Array Elements
Medium
Double a Number Represented as a Linked List
Medium
Find the Sum of the Power of All Subsequences
Hard
Calculate Delayed Arrival Time
Easy
Find Indices of Stable Mountains
Easy
Construct the Minimum Bitwise Array I3 Months
Easy
Find the Largest Almost Missing Integer
Easy
Design Task Manager6 Months
Medium
Last Stone Weight II6 Months
Medium
Find First Palindromic String in the Array
Easy
Sorted GCD Pair Queries
Hard
DNA Pattern Recognition
Medium
Minimum Array End
Medium
Additive Number
Medium
Longest Repeating Substring
Medium
Minimum Amount of Time to Fill Cups
Easy
Drop Duplicate Rows
Easy
Circle and Rectangle Overlapping
Medium
Sales Analysis III
Easy
Apple Redistribution into Boxes3 Months
Easy
Left and Right Sum Differences6 Months
Easy
Find the K-th Character in String Game II
Hard
Find K-th Smallest Pair Distance
Hard
Most Frequent Even Element
Easy
Minimum Cost to Convert String I30 Days
Medium
Apply Operations to an Array
Easy
Unique 3-Digit Even Numbers
Easy
Split Array into Fibonacci Sequence
Medium
String Matching in an Array
Easy
Find the Key of the Numbers
Easy
Smallest Even Multiple6 Months
Easy
Defuse the Bomb
Easy
Differences Between Two Objects
Medium
Minimum Operations to Make a Uni-Value Grid
Medium
Product Sales Analysis III6 Months
Medium
Last Day Where You Can Still Cross30 Days
Hard
Longest Palindrome After Substring Concatenation I
Medium
Tuple with Same Product
Medium
Maximum Value of an Ordered Triplet II
Medium
Find Maximum Area of a Triangle
Medium
The Latest Login in 2020
Easy
Check if Object Instance of Class
Medium
New 21 Game
Medium
Count Subarrays of Length Three With a Condition
Easy
Number of Even and Odd Bits6 Months
Easy
The Earliest and Latest Rounds Where Players Compete
Hard
Customers Who Bought All Products6 Months
Medium
Largest Perimeter Triangle6 Months
Easy
Nth Magical Number6 Months
Hard
Determine if String Halves Are Alike
Easy
Self Dividing Numbers3 Months
Easy
Find Root of N-Ary Tree
Medium
Rearrange Array Elements by Sign3 Months
Medium
Kth Largest Sum in a Binary Tree
Medium
Clear Digits6 Months
Easy
Time Needed to Inform All Employees6 Months
Medium
Extra Characters in a String
Medium
Jump Game V
Hard
Construct the Lexicographically Largest Valid Sequence
Medium
Minimum Number of Operations to Make Elements in Array Distinct
Easy
Unique Binary Search Trees II3 Months
Medium
Find Kth Bit in Nth Binary String
Medium
Maximum Number of Points with Cost
Medium
Total Characters in String After Transformations I
Medium
Count Largest Group
Easy
Count Number of Teams
Medium
Maximum Profit from Trading Stocks with Discounts3 Months
Hard
Longest Arithmetic Subsequence of Given Difference
Medium
Add Two Promises
Easy
Snake in Matrix
Easy
Minimum Absolute Difference in BST
Easy
Count of Interesting Subarrays
Medium
Minimum Division Operations to Make Array Non Decreasing
Medium
Reorder Data in Log Files
Medium
Memoize II6 Months
Hard
Number of Arithmetic Triplets
Easy
Paths in Matrix Whose Sum Is Divisible by K
Hard
Row With Maximum Ones
Easy
Reshape the Matrix
Easy
Count Total Number of Colored Cells
Medium
Longest Square Streak in an Array
Medium
Minimum K to Reduce Array Within Limit6 Months
Medium
Smallest Subarrays With Maximum Bitwise OR
Medium
Three Consecutive Odds
Easy
Find the Occurrence of First Almost Equal Substring
Hard
Largest Element in an Array after Merge Operations
Medium
To Lower Case
Easy
The Maze III
Hard
Poor Pigs
Hard
Number of Sub-arrays With Odd Sum
Medium
Maximum Frequency of an Element After Performing Operations I6 Months
Medium
Final Array State After K Multiplication Operations I
Easy
Longest Ideal Subsequence
Medium
Find Unique Binary String
Medium
Design Circular Deque
Medium
Add One Row to Tree
Medium
Minimum Limit of Balls in a Bag
Medium
Day of the Week
Easy
Find Weighted Median Node in Tree
Hard
Triangle Judgement6 Months
Easy
Root Equals Sum of Children6 Months
Easy
Maximum 69 Number
Easy
Car Fleet II
Hard
Count the Number of Ideal Arrays
Hard
Greatest Sum Divisible by Three3 Months
Medium
Set Intersection Size At Least Two6 Months
Hard
4Sum II6 Months
Medium
Combination Sum III3 Months
Medium
Minimum Moves to Equal Array Elements
Medium
Base 7
Easy
First Completely Painted Row or Column
Medium
Validate Binary Tree Nodes
Medium
Design a Food Rating System6 Months
Medium
Minimum Operations to Make Array Elements Zero6 Months
Hard
Find Minimum in Rotated Sorted Array II6 Months
Hard
Count Prime-Gap Balanced Subarrays
Medium
Find Good Days to Rob the Bank
Medium
Final Value of Variable After Performing Operations6 Months
Easy
Sum of Good Numbers
Easy
Count Number of Balanced Permutations
Hard
Binary Searchable Numbers in an Unsorted Array
Medium
Prime Palindrome
Medium
Sequential Digits
Medium
Find the Original Typed String II
Hard
Rank Transform of an Array6 Months
Easy
Calculator with Method Chaining
Easy
Equal Row and Column Pairs
Medium
Maximum Number of Operations to Move Ones to the End6 Months
Medium
Maximum Erasure Value
Medium
Generate Fibonacci Sequence
Easy
Minimum Score After Removals on a Tree
Hard
Number of Ways to Arrive at Destination30 Days
Medium
Sum of k-Mirror Numbers
Hard
Minimum Time to Complete All Deliveries
Medium
Rectangle Area II6 Months
Hard
Sorting the Sentence3 Months
Easy
Partition Array for Maximum Sum
Medium
Maximum Sum of Two Non-Overlapping Subarrays
Medium
Minimize Maximum Pair Sum in Array30 Days
Medium
Hamming Distance
Easy
Range Sum Query - Mutable
Medium
Flip Columns For Maximum Number of Equal Rows
Medium
Largest Prime from Consecutive Prime Sum
Medium
Divisible and Non-divisible Sums Difference
Easy
Find All Groups of Farmland
Medium
Longest Subsequence With Limited Sum
Easy
Minimum Increments to Equalize Leaf Paths
Medium
Count Number of Trapezoids I3 Months
Medium
Find the Number of Ways to Place People I6 Months
Medium
Number of Zero-Filled Subarrays
Medium
Maximum Product of Two Digits
Easy
Maximum Number of Moves to Kill All Pawns
Hard
Find the Minimum Cost Array Permutation
Hard
Partition Array into Disjoint Intervals
Medium
Insertion Sort List
Medium
Shortest String That Contains Three Strings
Medium
Build Array from Permutation
Easy
Convert an Array Into a 2D Array With Conditions
Medium
Delete Leaves With a Given Value6 Months
Medium
Display the First Three Rows
Easy
Harshad Number
Easy
Shortest Distance After Road Addition Queries I
Medium
Find Substring With Given Hash Value
Hard
K-th Largest Perfect Subtree Size in Binary Tree
Medium
Check If Digits Are Equal in String After Operations I6 Months
Easy
Find Closest Person6 Months
Easy
A Number After a Double Reversal
Easy
Unique Word Abbreviation
Medium
Number Complement
Easy
Find the String with LCP
Hard
Bag of Tokens
Medium
Domino and Tromino Tiling
Medium
K-th Symbol in Grammar
Medium
Minimum Adjacent Swaps to Reach the Kth Smallest Number
Medium
Minimum Consecutive Cards to Pick Up
Medium
Length of Longest Fibonacci Subsequence
Medium
Four Divisors3 Months
Medium
Find the Student that Will Replace the Chalk
Medium
Detect Capital3 Months
Easy
Find the Largest Area of Square Inside Two Rectangles3 Months
Medium
Lexicographically Smallest Permutation Greater Than Target6 Months
Medium
Super Palindromes
Hard
Check if There is a Valid Partition For The Array
Medium
Maximize Cyclic Partition Score6 Months
Hard
Magical String
Medium
Apply Operations to Maximize Score
Hard
Find the Largest Palindrome Divisible by K
Hard
Find Mode in Binary Search Tree
Easy
Beautiful Array
Medium
Smallest Number in Infinite Set
Medium
Split With Minimum Sum
Easy
Count Partitions With Max-Min Difference at Most K6 Months
Medium