Schedule

Easy & Medium

Hard

• Two Sum
• Add Two Numbers
• Longest Substring Without Repeating Characters
• Median of Two Sorted Arrays Hard
• Longest Palindromic Substring
• Zigzag Conversion
• Reverse Integer
• String to Integer (atoi)
• Palindrome Number
• Regular Expression Matching Hard
• Container With Most Water
• Integer to Roman
• Roman to Integer
• Longest Common Prefix
• 3Sum
• 3Sum Closest
• Letter Combinations of a Phone Number
• 4Sum
• Remove Nth Node From End of List
• Valid Parentheses
• Merge Two Sorted Lists
• Generate Parentheses
• Merge k Sorted Lists Hard
• Swap Nodes in Pairs
• Reverse Nodes in k-Group Hard
• Remove Duplicates from Sorted Array
• Remove Element
• Find the Index of the First Occurrence in a String
• Divide Two Integers
• Substring with Concatenation of All Words Hard
• Next Permutation
• Longest Valid Parentheses Hard
• Search in Rotated Sorted Array
• Find First and Last Position of Element in Sorted Array
• Search Insert Position
• Valid Sudoku
• Sudoku Solver Hard
• Count and Say
• Combination Sum
• Combination Sum II
• First Missing Positive Hard
• Trapping Rain Water Hard
• Multiply Strings
• Wildcard Matching Hard
• Jump Game II
• Permutations
• Permutations II
• Rotate Image
• Group Anagrams
• Pow(x, n)
• N-Queens Hard
• N-Queens II Hard
• Maximum Subarray
• Spiral Matrix
• Jump Game
• Merge Intervals
• Insert Interval
• Length of Last Word
• Spiral Matrix II
• Permutation Sequence
• Rotate List
• Unique Paths
• Unique Paths II
• Minimum Path Sum
• Valid Number Hard
• Plus One
• Add Binary
• Text Justification Hard
• Sqrt(x)
• Climbing Stairs
• Simplify Path
• Edit Distance
• Set Matrix Zeroes
• Search a 2D Matrix
• Sort Colors
• Minimum Window Substring Hard
• Combinations
• Subsets
• Word Search
• Remove Duplicates from Sorted Array II
• Search in Rotated Sorted Array II
• Remove Duplicates from Sorted List II
• Remove Duplicates from Sorted List
• Largest Rectangle in Histogram Hard
• Maximal Rectangle Hard
• Partition List
• Scramble String Hard
• Merge Sorted Array
• Gray Code
• Subsets II
• Decode Ways
• Reverse Linked List II
• Restore IP Addresses
• Binary Tree Inorder Traversal
• Unique Binary Search Trees II
• Unique Binary Search Trees
• Interleaving String
• Validate Binary Search Tree
• Recover Binary Search Tree
• Same Tree
• Symmetric Tree
• Binary Tree Level Order Traversal
• Binary Tree Zigzag Level Order Traversal
• Maximum Depth of Binary Tree
• Construct Binary Tree from Preorder and Inorder Traversal
• Construct Binary Tree from Inorder and Postorder Traversal
• Binary Tree Level Order Traversal II
• Convert Sorted Array to Binary Search Tree
• Convert Sorted List to Binary Search Tree
• Balanced Binary Tree
• Minimum Depth of Binary Tree
• Path Sum
• Path Sum II
• Flatten Binary Tree to Linked List
• Distinct Subsequences Hard
• Populating Next Right Pointers in Each Node
• Populating Next Right Pointers in Each Node II
• Pascal's Triangle
• Pascal's Triangle II
• Triangle
• Best Time to Buy and Sell Stock
• Best Time to Buy and Sell Stock II
• Best Time to Buy and Sell Stock III Hard
• Binary Tree Maximum Path Sum Hard
• Valid Palindrome
• Word Ladder II Hard
• Word Ladder
• Longest Consecutive Sequence
• Sum Root to Leaf Numbers
• Surrounded Regions
• Palindrome Partitioning
• Palindrome Partitioning II Hard
• Clone Graph
• Gas Station
• Candy Hard
• Single Number
• Single Number II Medium
• Copy List with Random Pointer
• Word Break
• Word Break II Hard
• Linked List Cycle
• Linked List Cycle II
• Reorder List
• Binary Tree Preorder Traversal
• Binary Tree Postorder Traversal
• LRU Cache
• Insertion Sort List
• Sort List
• Max Points on a Line Hard
• Evaluate Reverse Polish Notation
• Reverse Words in a String
• Maximum Product Subarray
• Find Minimum in Rotated Sorted Array
• Find Minimum in Rotated Sorted Array II Hard
• Min Stack
• Binary Tree Upside Down
• Read N Characters Given Read4
• Read N Characters Given read4 II - Call Multiple Times Hard
• Longest Substring with At Most Two Distinct Characters
• Intersection of Two Linked Lists
• One Edit Distance
• Find Peak Element
• Missing Ranges
• Maximum Gap Hard
• Compare Version Numbers
• Fraction to Recurring Decimal
• Two Sum II - Input Array Is Sorted
• Excel Sheet Column Title
• Majority Element
• Two Sum III - Data structure design
• Excel Sheet Column Number
• Factorial Trailing Zeroes
• Binary Search Tree Iterator
• Dungeon Game Hard
• Combine Two Tables
• Second Highest Salary
• Nth Highest Salary
• Rank Scores
• Largest Number
• Consecutive Numbers
• Employees Earning More Than Their Managers
• Duplicate Emails
• Customers Who Never Order
• Department Highest Salary
• Department Top Three Salaries
• Reverse Words in a String II
• Repeated DNA Sequences
• Best Time to Buy and Sell Stock IV Hard
• Rotate Array
• Reverse Bits
• Number of 1 Bits
• Word Frequency
• Valid Phone Numbers
• Transpose File
• Tenth Line
• Delete Duplicate Emails
• Rising Temperature
• House Robber
• Binary Tree Right Side View
• Number of Islands
• Bitwise AND of Numbers Range
• Happy Number
• Remove Linked List Elements
• Count Primes
• Isomorphic Strings
• Reverse Linked List
• Course Schedule
• Implement Trie (Prefix Tree)
• Minimum Size Subarray Sum
• Course Schedule II
• Design Add and Search Words Data Structure
• Word Search II Hard
• House Robber II
• Shortest Palindrome Hard
• Kth Largest Element in an Array
• Combination Sum III
• Contains Duplicate
• The Skyline Problem Hard
• Contains Duplicate II
• Contains Duplicate III
• Maximal Square
• Count Complete Tree Nodes
• Rectangle Area
• Basic Calculator Hard
• Implement Stack using Queues
• Invert Binary Tree
• Basic Calculator II
• Summary Ranges
• Majority Element II Medium
• Kth Smallest Element in a BST
• Power of Two
• Implement Queue using Stacks
• Number of Digit One Hard
• Palindrome Linked List
• Lowest Common Ancestor of a Binary Search Tree
• Lowest Common Ancestor of a Binary Tree
• Delete Node in a Linked List
• Product of Array Except Self
• Sliding Window Maximum Hard
• Search a 2D Matrix II
• Different Ways to Add Parentheses
• Valid Anagram
• Shortest Word Distance
• Shortest Word Distance II
• Shortest Word Distance III
• Strobogrammatic Number
• Strobogrammatic Number II
• Strobogrammatic Number III Hard
• Group Shifted Strings
• Count Univalue Subtrees
• Flatten 2D Vector
• Meeting Rooms
• Meeting Rooms II
• Factor Combinations
• Verify Preorder Sequence in Binary Search Tree
• Paint House
• Binary Tree Paths
• Add Digits
• 3Sum Smaller
• Single Number III
• Graph Valid Tree
• Trips and Users
• Ugly Number
• Ugly Number II
• Paint House II Hard
• Palindrome Permutation
• Palindrome Permutation II
• Missing Number
• Alien Dictionary Hard
• Closest Binary Search Tree Value
• Encode and Decode Strings
• Closest Binary Search Tree Value II Hard
• Integer to English Words Hard
• H-Index
• H-Index II
• Paint Fence
• Find the Celebrity
• First Bad Version
• Perfect Squares
• Wiggle Sort
• Zigzag Iterator
• Expression Add Operators Hard
• Move Zeroes
• Peeking Iterator
• Inorder Successor in BST
• Walls and Gates
• Find the Duplicate Number
• Unique Word Abbreviation
• Game of Life
• Word Pattern
• Word Pattern II
• Nim Game
• Flip Game
• Flip Game II
• Find Median from Data Stream Hard
• Best Meeting Point Hard
• Serialize and Deserialize Binary Tree
• Binary Tree Longest Consecutive Sequence
• Bulls and Cows
• Longest Increasing Subsequence
• Remove Invalid Parentheses Hard
• Smallest Rectangle Enclosing Black Pixels Hard
• Range Sum Query - Immutable
• Range Sum Query 2D - Immutable
• Number of Islands II Hard
• Additive Number
• Range Sum Query - Mutable
• Range Sum Query 2D - Mutable Hard
• Best Time to Buy and Sell Stock with Cooldown
• Minimum Height Trees
• Sparse Matrix Multiplication
• Burst Balloons Hard
• Super Ugly Number Medium
• Binary Tree Vertical Order Traversal
• Count of Smaller Numbers After Self Hard
• Remove Duplicate Letters
• Shortest Distance from All Buildings Hard
• Maximum Product of Word Lengths
• Bulb Switcher
• Generalized Abbreviation
• Create Maximum Number Hard
• Coin Change
• Number of Connected Components in an Undirected Graph
• Wiggle Sort II
• Maximum Size Subarray Sum Equals k
• Power of Three
• Count of Range Sum Hard
• Odd Even Linked List
• Longest Increasing Path in a Matrix Hard
• Patching Array Hard
• Verify Preorder Serialization of a Binary Tree
• Reconstruct Itinerary Hard
• Largest BST Subtree
• Increasing Triplet Subsequence
• Self Crossing Hard
• Palindrome Pairs Hard
• House Robber III Medium
• Counting Bits
• Nested List Weight Sum
• Longest Substring with At Most K Distinct Characters
• Flatten Nested List Iterator
• Power of Four
• Integer Break
• Reverse String
• Reverse Vowels of a String
• Moving Average from Data Stream
• Top K Frequent Elements
• Design Tic-Tac-Toe
• Intersection of Two Arrays
• Intersection of Two Arrays II
• Android Unlock Patterns
• Data Stream as Disjoint Intervals Hard
• Design Snake Game
• Russian Doll Envelopes Hard
• Design Twitter
• Line Reflection
• Count Numbers with Unique Digits
• Rearrange String k Distance Apart Hard
• Logger Rate Limiter
• Sort Transformed Array
• Bomb Enemy
• Design Hit Counter
• Max Sum of Rectangle No Larger Than K Hard
• Nested List Weight Sum II
• Water and Jug Problem
• Find Leaves of Binary Tree
• Valid Perfect Square
• Largest Divisible Subset
• Plus One Linked List
• Range Addition
• Sum of Two Integers
• Super Pow
• Find K Pairs with Smallest Sums
• Guess Number Higher or Lower
• Guess Number Higher or Lower II Medium
• Wiggle Subsequence
• Combination Sum IV
• Kth Smallest Element in a Sorted Matrix
• Design Phone Directory
• Insert Delete GetRandom O(1)
• Insert Delete GetRandom O(1) - Duplicates allowed Hard
• Linked List Random Node
• Ransom Note
• Shuffle an Array
• Mini Parser
• Lexicographical Numbers
• First Unique Character in a String
• Longest Absolute File Path
• Find the Difference
• Elimination Game
• Perfect Rectangle Hard
• Is Subsequence
• UTF-8 Validation
• Decode String
• Longest Substring with At Least K Repeating Characters
• Rotate Function
• Integer Replacement
• Random Pick Index
• Evaluate Division
• Nth Digit
• Binary Watch
• Remove K Digits
• Frog Jump Hard
• Sum of Left Leaves
• Convert a Number to Hexadecimal
• Queue Reconstruction by Height
• Trapping Rain Water II Hard
• Valid Word Abbreviation
• Longest Palindrome
• Fizz Buzz
• Arithmetic Slices
• Third Maximum Number
• Add Strings
• Partition Equal Subset Sum
• Pacific Atlantic Water Flow
• Sentence Screen Fitting
• Battleships in a Board
• Maximum XOR of Two Numbers in an Array
• Valid Word Square
• Reconstruct Original Digits from English
• Longest Repeating Character Replacement
• Convert Binary Search Tree to Sorted Doubly Linked List
• Construct Quad Tree
• N-ary Tree Level Order Traversal
• Flatten a Multilevel Doubly Linked List
• Minimum Genetic Mutation
• Number of Segments in a String
• Non-overlapping Intervals
• Find Right Interval
• Path Sum III
• Find All Anagrams in a String
• Ternary Expression Parser
• Arranging Coins
• Find All Duplicates in an Array
• String Compression
• Sequence Reconstruction
• Add Two Numbers II
• Number of Boomerangs
• Find All Numbers Disappeared in an Array
• Serialize and Deserialize BST
• Delete Node in a BST
• Sort Characters By Frequency
• Minimum Number of Arrows to Burst Balloons
• Minimum Moves to Equal Array Elements
• 4Sum II
• Assign Cookies
• 132 Pattern
• Circular Array Loop
• Repeated Substring Pattern
• Hamming Distance
• Minimum Moves to Equal Array Elements II
• Island Perimeter
• Can I Win
• Unique Substrings in Wraparound String
• Validate IP Address
• Convex Polygon
• Implement Rand10() Using Rand7()
• Matchsticks to Square
• Ones and Zeroes
• Heaters
• Number Complement
• Total Hamming Distance
• Generate Random Point in a Circle
• Magical String
• License Key Formatting
• Find Permutation
• Max Consecutive Ones
• Predict the Winner
• Max Consecutive Ones II
• The Maze
• Non-decreasing Subsequences
• Construct the Rectangle
• Target Sum
• Teemo Attacking
• Next Greater Element I
• Random Point in Non-overlapping Rectangles
• Diagonal Traverse
• Keyboard Row
• Find Mode in Binary Search Tree
• Next Greater Element II
• Base 7
• The Maze II
• Relative Ranks
• Perfect Number
• Most Frequent Subtree Sum
• Fibonacci Number
• Inorder Successor in BST II
• Game Play Analysis I
• Game Play Analysis II
• Find Bottom Left Tree Value
• Find Largest Value in Each Tree Row
• Longest Palindromic Subsequence
• Coin Change II
• Random Flip Matrix
• Detect Capital
• Longest Uncommon Subsequence I
• Longest Uncommon Subsequence II
• Continuous Subarray Sum
• Longest Word in Dictionary through Deleting
• Contiguous Array
• Beautiful Arrangement
• Random Pick with Weight
• Minesweeper
• Minimum Absolute Difference in BST
• Lonely Pixel I
• K-diff Pairs in an Array
• Lonely Pixel II
• Game Play Analysis III
• Encode and Decode TinyURL
• Construct Binary Tree from String
• Complex Number Multiplication
• Convert BST to Greater Tree
• Minimum Time Difference
• Single Element in a Sorted Array
• Reverse String II
• 01 Matrix
• Diameter of Binary Tree
• Output Contest Matches
• Boundary of Binary Tree
• Number of Provinces
• Binary Tree Longest Consecutive Sequence II
• Student Attendance Record I
• Optimal Division
• Brick Wall
• Split Concatenated Strings
• Next Greater Element III
• Reverse Words in a String III
• Logical OR of Two Binary Grids Represented as Quad-Trees
• Maximum Depth of N-ary Tree
• Subarray Sum Equals K
• Array Partition
• Longest Line of Consecutive One in Matrix
• Binary Tree Tilt
• Array Nesting
• Reshape the Matrix
• Permutation in String
• Median Employee Salary
• Managers with at Least 5 Direct Reports
• Find Median Given Frequency of Numbers
• Subtree of Another Tree
• Squirrel Simulation
• Winning Candidate
• Distribute Candies
• Out of Boundary Paths
• Employee Bonus
• Get Highest Answer Rate Question
• Find Cumulative Salary of an Employee
• Count Student Number in Departments
• Shortest Unsorted Continuous Subarray
• Kill Process
• Delete Operation for Two Strings
• Find Customer Referee
• Investments in 2016
• Customer Placing the Largest Number of Orders
• N-ary Tree Preorder Traversal
• N-ary Tree Postorder Traversal
• Fraction Addition and Subtraction
• Valid Square
• Longest Harmonious Subsequence
• Big Countries
• Classes More Than 5 Students
• Friend Requests I: Overall Acceptance Rate
• Range Addition II
• Minimum Index Sum of Two Lists
• Human Traffic of Stadium
• Friend Requests II: Who Has the Most Friends
• Consecutive Available Seats
• Design Compressed String Iterator
• Can Place Flowers
• Construct String from Binary Tree
• Sales Person
• Tree Node
• Find Duplicate File in System
• Triangle Judgement
• Valid Triangle Number
• Shortest Distance in a Plane
• Shortest Distance in a Line
• Second Degree Follower
• Average Salary: Departments VS Company
• Add Bold Tag in String
• Merge Two Binary Trees
• Students Report By Geography
• Biggest Single Number
• Not Boring Movies
• Task Scheduler
• Design Circular Queue
• Add One Row to Tree
• Maximum Distance in Arrays
• Minimum Factorization
• Exchange Seats
• Swap Salary
• Maximum Product of Three Numbers
• Sum of Square Numbers
• Find the Derangement of An Array
• Design Log Storage System
• Exclusive Time of Functions
• Average of Levels in Binary Tree
• Shopping Offers
• Solve the Equation
• Design Circular Deque
• Maximum Average Subarray I
• Set Mismatch
• Maximum Length of Pair Chain
• Palindromic Substrings
• Replace Words
• Dota2 Senate
• 2 Keys Keyboard
• 4 Keys Keyboard
• Find Duplicate Subtrees
• Two Sum IV - Input is a BST
• Maximum Binary Tree
• Print Binary Tree
• Robot Return to Origin
• Find K Closest Elements
• Split Array into Consecutive Subsequences
• Image Smoother
• Maximum Width of Binary Tree
• Equal Tree Partition
• Non-decreasing Array
• Path Sum IV
• Beautiful Arrangement II
• Trim a Binary Search Tree
• Maximum Swap
• Second Minimum Node In a Binary Tree
• Bulb Switcher II
• Number of Longest Increasing Subsequence
• Longest Continuous Increasing Subsequence
• Implement Magic Dictionary
• Map Sum Pairs
• Valid Parenthesis String
• Valid Palindrome II
• Next Closest Time
• Baseball Game
• Redundant Connection
• Repeated String Match
• Longest Univalue Path
• Knight Probability in Chessboard
• Employee Importance
• Stickers to Spell Word Hard
• Top K Frequent Words
• Binary Number with Alternating Bits
• Number of Distinct Islands
• Max Area of Island
• Count Binary Substrings
• Degree of an Array
• Partition to K Equal Sum Subsets
• Falling Squares Hard
• Search in a Binary Search Tree
• Insert into a Binary Search Tree
• Search in a Sorted Array of Unknown Size
• Kth Largest Element in a Stream
• Binary Search
• Design HashSet Easy
• Design HashMap Easy
• Design Linked List Medium
• Insert into a Sorted Circular Linked List Medium
• To Lower Case Easy
• Random Pick with Blacklist Hard
• Number of Distinct Islands II Hard
• Minimum ASCII Delete Sum for Two Strings Medium
• Subarray Product Less Than K Medium
• Best Time to Buy and Sell Stock with Transaction Fee Medium
• Range Module Hard
• Max Stack Hard
• 1-bit and 2-bit Characters Easy
• Maximum Length of Repeated Subarray Medium
• Longest Word in Dictionary Medium
• Accounts Merge Medium
• Remove Comments Medium
• Candy Crush Medium
• Find Pivot Index Easy
• Split Linked List in Parts Medium
• Self Dividing Numbers Easy
• My Calendar I Medium
• My Calendar II Medium
• Flood Fill Easy
• Sentence Similarity Easy
• Asteroid Collision Medium
• Sentence Similarity II Medium
• Monotone Increasing Digits Medium
• Daily Temperatures Medium
• Delete and Earn Medium
• Closest Leaf in a Binary Tree Medium
• Network Delay Time Medium
• Find Smallest Letter Greater Than Target Easy
• Min Cost Climbing Stairs Easy
• Largest Number At Least Twice of Others Easy
• Shortest Completing Word Easy
• Number Of Corner Rectangles Medium
• IP to CIDR Medium
• Open the Lock Medium
• Reach a Number Medium
• Pour Water Medium
• Pyramid Transition Matrix Medium
• Bold Words in String
• Find Anagram Mappings Easy
• Prime Number of Set Bits in Binary Representation Easy
• Partition Labels Medium
• Largest Plus Sign Medium
• Toeplitz Matrix Easy
• Reorganize String Medium
• Max Chunks To Make Sorted Medium
• Jewels and Stones Easy
• Sliding Puzzle Hard
• Global and Local Inversions Medium
• Split BST Medium
• Swap Adjacent in LR String Medium
• K-th Symbol in Grammar Medium
• Rabbits in Forest Medium
• Minimum Distance Between BST Nodes
• Letter Case Permutation Medium
• Is Graph Bipartite? Medium
• K-th Smallest Prime Fraction Medium
• Cheapest Flights Within K Stops Medium
• Rotated Digits Medium
• Escape The Ghosts Medium
• Domino and Tromino Tiling Medium
• Custom Sort String Medium
• Number of Matching Subsequences Medium
• Valid Tic-Tac-Toe State Medium
• Number of Subarrays with Bounded Maximum Medium
• Rotate String Easy
• All Paths From Source to Target Medium
• Champagne Tower Medium
• Similar RGB Color Easy
• Minimum Swaps To Make Sequences Increasing Hard
• Most Common Word * Easy
• Shortest Distance to a Character Easy
• Friends Of Appropriate Ages Medium
• Making A Large Island Hard
• Flipping an Image Easy
• Find And Replace in String Medium
• Rectangle Overlap Easy
• Guess the Word Hard
• Backspace String Compare Easy
• Longest Mountain in Array Medium
• Maximize Distance to Closest Person Medium
• Peak Index in a Mountain Array Medium
• Car Fleet Medium
• Exam Room Medium
• Score of Parentheses * Medium
• Shortest Subarray with Sum at Least K Hard
• All Nodes Distance K in Binary Tree ** Medium
• Transpose Matrix Easy
• Leaf-Similar Trees Easy
• Middle of the Linked List Easy
• Boats to Save People Medium
• Spiral Matrix III Medium
• Possible Bipartition Medium
• Fair Candy Swap Easy
• Find and Replace Pattern Medium
• Online Stock Span Medium
• Minimum Add to Make Parentheses Valid Medium
• Range Sum of BST Easy
• Verifying an Alien Dictionary Easy
• K Closest Points to Origin Medium
• Subarray Sums Divisible by K Medium
• Interval List Intersections Medium
• Vertical Order Traversal of a Binary Tree Hard
• Cousins in Binary Tree Easy
• Grid Illumination Hard
• Find Common Characters Easy
• Max Consecutive Ones III * Medium
• Clumsy Factorial Medium
• Construct Binary Search Tree from Preorder Traversal Medium
• Complement of Base 10 Integer
• Partition Array Into Three Parts With Equal Sum Easy
• Next Greater Node In Linked List Medium
• Number of Enclaves Medium
• Longest Arithmetic Subsequence Medium
• Maximum Sum of Two Non-Overlapping Subarrays Medium
• Binary Search Tree to Greater Sum Tree
• Customers Who Bought All Products
• Remove All Adjacent Duplicates In String Easy
• Actors and Directors Who Cooperated At Least Three Times
• Previous Permutation With One Swap Medium
• Product Sales Analysis I
• Product Sales Analysis II
• Product Sales Analysis III
• Project Employees I
• Project Employees II
• Project Employees III
• Smallest Subsequence of Distinct Characters
• Sales Analysis I
• Sales Analysis II
• Sales Analysis III
• Duplicate Zeros Easy
• Shortest Path in Binary Matrix Medium
• Game Play Analysis V
• Unpopular Books
• The Earliest Moment When Everyone Become Friends Medium
• New Users Daily Count
• Delete Nodes And Return Forest Medium
• Highest Grade For Each Student
• Reported Posts
• Print in Order
• Print FooBar Alternately
• Print Zero Even Odd
• Building H2O
• Active Businesses
• User Purchase Platform
• Reported Posts II
• Parallel Courses Medium
• User Activity for the Past 30 Days I
• User Activity for the Past 30 Days II
• Longest Common Subsequence Medium
• Article Views I
• Article Views II
• Market Analysis I
• Market Analysis II
• Product Price at a Given Date
• Immediate Food Delivery I
• Immediate Food Delivery II
• Reformat Department Table
• Design Bounded Blocking Queue
• Monthly Transactions I
• Tournament Winners
• Fizz Buzz Multithreaded
• Ugly Number III Medium
• Smallest String With Swaps Medium
• Last Person to Fit in the Bus
• Monthly Transactions II
• Design Skiplist Medium
• Queries Quality and Percentage
• Team Scores in Football Tournament
• Valid Palindrome III Hard
• Report Contiguous Dates
• The Dining Philosophers
• Number of Comments per Post
• Web Crawler Multithreaded
• Minimum Remove to Make Valid Parentheses Medium
• Average Selling Price
• Number of Closed Islands Medium
• Page Recommendations
• All People Report to the Given Manager
• Traffic Light Controlled Intersection
• Students and Examinations
• Find the Start and End Number of Continuous Ranges
• Weather Type in Each Country
• Number of Paths with Max Score Hard
• Find the Team Size
• Find N Unique Integers Sum up to Zero Easy
• Running Total for Different Genders
• Restaurant Growth
• Ads Performance
• List the Products Ordered in a Period
• Number of Transactions per Visit
• Movie Rating
• Students With Invalid Departments
• Activity Participants
• Number of Trusted Contacts of a Customer
• Get the Second Most Recent Activity
• Replace Employee ID With The Unique Identifier
• Total Sales Amount by Year
• Capital Gain/Loss
• Find Lucky Integer in an Array Easy
• Customers Who Bought Products A and B but Not C
• Circle and Rectangle Overlapping Medium
• Top Travellers
• Find the Quiet Students in All Exams
• Reformat The String Easy
• NPV Queries
• Diagonal Traverse II Medium
• Create a Session Bar Chart
• Evaluate Boolean Expression
• Apples & Oranges
• Active Users
• Rectangles Area
• Calculate Salaries
• Sales by Day of the Week
• Group Sold Products By The Date
• Friendly Movies Streamed Last Month
• Countries You Can Safely Invest In
• Customer Order Frequency
• Find Users With Valid E-Mails
• Patients With a Condition
• String Compression II Hard
• The Most Recent Three Orders
• Kth Missing Positive Number Easy
• Fix Product Name Format
• The Most Recent Orders for Each Product
• Bank Account Summary
• Unique Orders and Customers Per Month
• Dot Product of Two Sparse Vectors Medium
• Warehouse Manager
• Customer Who Visited but Did Not Make Any Transactions
• Bank Account Summary II
• The Most Frequently Ordered Products for Each Customer
• Maximum Number of Achievable Transfer Requests Hard
• Sellers With No Sales
• Maximum Number of Visible Points Hard
• Find the Missing IDs
• All Valid Triplets That Can Represent a Country
• Percentage of Users Attended a Contest
• Hopper Company Queries I
• Hopper Company Queries II
• Lowest Common Ancestor of a Binary Tree III Medium
• Hopper Company Queries III
• Determine if Two Strings Are Close Medium
• Average Time of Process per Machine
• Fix Names in a Table
• Product's Worth Over Invoices
• Invalid Tweets
• Daily Leads and Partners
• Number of Calls Between Two Persons
• Average Waiting Time Medium
• Biggest Window Between Visits
• Count Apples and Oranges
• Swapping Nodes in a Linked List Medium
• Find Followers Count
• The Number of Employees Which Report to Each Employee
• Find Total Time Spent by Each Employee
• Leetflex Banned Accounts
• Recyclable and Low Fat Products
• Buildings With an Ocean View Medium
• Form Array by Concatenating Subarrays of Another Array Medium
• Find the Subtasks That Did Not Execute
• Merge Strings Alternately Easy
• Car Fleet II Hard
• Product's Price for Each Store
• Find Nearest Point That Has the Same X or Y Coordinate Easy
• Grand Slam Titles
• Primary Department for Each Employee
• Rearrange Products Table
• Number of Orders in the Backlog Medium
• Ad-Free Sessions
• Find Interview Candidates
• Find Customers With Positive Revenue this Year
• Maximum Transaction Each Day
• League Statistics
• Suspicious Bank Accounts
• Convert Date Format
• Largest Color Value in a Directed Graph Hard
• Orders With Maximum Quantity Above Average
• Product of Two Run-Length Encoded Arrays Medium
• Calculate Special Bonus
• Group Employees of the Same Salary
• The Latest Login in 2020
• Page Recommendations II
• Find a Peak Element II Medium
• Count Salary Categories
• Leetcodify Friends Recommendations
• Leetcodify Similar Friends
• Confirmation Rate
• Users That Actively Request Confirmation Messages
• Strong Friendship
• All the Pairs With the Maximum Number of Common Followers
• Employees With Missing Information
• First and Last Call On the Same Day
• Employees Whose Manager Left the Company
• Find Cutoff Score for Each School
• Count the Number of Experiments
• The Number of Seniors and Juniors to Join the Company
• The Number of Seniors and Juniors to Join the Company II
• Number of Accounts That Did Not Stream
• Low-Quality Problems
• Accepted Candidates From the Interviews
• The Category of Each Member in the Store
• Account Balance
• The Winner University
• The Number of Rich Customers
• Drop Type 1 Orders for Customers With Type 0 Orders
• Detonate the Maximum Bombs Medium
• The Airport With the Most Traffic
• Build the Equation
• The Number of Passengers in Each Bus I
• The Number of Passengers in Each Bus II
• Order Two Columns Independently
• Longest Winning Streak
• The Change in Global Rankings
• Finding the Topic of Each Post
• The Number of Users That Are Eligible for Discount
• Users With Two Purchases Within Seven Days
• The Users That Are Eligible for Discount
• Add Two Integers Easy
• Number of Times a Driver Was a Passenger
• Dynamic Pivoting of a Table
• Dynamic Unpivoting of a Table
• Check if Number Has Equal Digit Count and Digit Value Easy
• Products With Three or More Orders in Two Consecutive Years
• Tasks Count in the Weekend
• Arrange Table by Gender
• The First Day of the Maximum Recorded Degree in Each City
• Product Sales Analysis IV
• Product Sales Analysis V
• The Latest Time to Catch a Bus Medium
• All the Matches of the League
• Compute the Rank as a Percentage
• Number of Unique Subjects Taught by Each Teacher
• Generate the Invoice
• Task Scheduler II Medium
• Calculate the Influence of Each Salesperson
• Sort the Olympic Table
• Change Null Values in a Table to the Previous Value
• Employees With Deductions
• Meeting Rooms III Hard
• Height of Binary Tree After Subtree Removal Queries Hard