LeetCode题目集
介绍
分类
Stack
Valid Parentheses
Trapping Rain Water
Simplify Path
Largest Rectangle in Histogram
Maximal Rectangle
Binary Tree Inorder Traversal
Binary Tree Zigzag Level Order Traversal
Binary Tree Preorder Traversal
Binary Tree Postorder Traversal
Evaluate Reverse Polish Notation
Min Stack
Binary Search Tree Iterator
Flatten Nested List Iterator
Mini Parser
Decode String
Remove K Digits
132 Pattern
Next Greater Element I
Next Greater Element II
Tag Validator
Exclusive Time of Functions
Baseball Game
Number of Atoms
Asteroid Collision
Daily Temperatures
Basic Calculator IV
Basic Calculator
Implement Stack using Queues
Implement Queue using Stacks
Backspace String Compare
Remove Duplicate Letters
Verify Preorder Serialization of a Binary Tree
Car Fleet
Score of Parentheses
Decoded String at Index
Maximum Frequency Stack
Online Stock Span
Sum of Subarray Minimums
Heap
Merge k Sorted Lists
Top K Frequent Elements
Design Twitter
Find K Pairs with Smallest Sums
Kth Smallest Element in a Sorted Matrix
Trapping Rain Water II
Sort Characters By Frequency
IPO
Split Array into Consecutive Subsequences
Top K Frequent Words
Find K-th Smallest Pair Distance
Network Delay Time
Reorganize String
Swim in Rising Water
K-th Smallest Prime Fraction
Cheapest Flights Within K Stops
Race Car
Kth Largest Element in an Array
The Skyline Problem
Sliding Window Maximum
Ugly Number II
Super Ugly Number
Minimum Cost to Hire K Workers
Shortest Path to Get All Keys
Kth Largest Element in a Stream
Reachable Nodes In Subdivided Graph
Find Median from Data Stream
Greedy
Wildcard Matching
Jump Game II
Jump Game
Best Time to Buy and Sell Stock II
Gas Station
Candy
Is Subsequence
Remove K Digits
Queue Reconstruction by Height
Minimum Number of Arrows to Burst Balloons
Non-overlapping Intervals
Assign Cookies
IPO
Dota2 Senate
Course Schedule III
Task Scheduler
Split Array into Consecutive Subsequences
Best Time to Buy and Sell Stock with Transaction Fee
Monotone Increasing Digits
Set Intersection Size At Least Two
Partition Labels
Couples Holding Hands
Reorganize String
Split Array into Fibonacci Sequence
Remove Duplicate Letters
Create Maximum Number
Patching Array
Lemonade Change
Score After Flipping Matrix
Walking Robot Simulation
Boats to Save People
Wiggle Subsequence
Stamping The Sequence
Sort
Merge Intervals
Insert Interval
Sort Colors
Insertion Sort List
Sort List
Longest Word in Dictionary through Deleting
Reorganize String
Maximum Gap
Largest Number
Valid Anagram
H-Index
Wiggle Sort II
Random Pick with Blacklist
Intersection of Two Arrays
Intersection of Two Arrays II
Bit Manipulation
Subsets
Single Number
Single Number II
Repeated DNA Sequences
Power of Two
Counting Bits
Power of Four
Sum of Two Integers
Find the Difference
UTF-8 Validation
Integer Replacement
Binary Watch
Convert a Number to Hexadecimal
Maximum XOR of Two Numbers in an Array
Hamming Distance
Total Hamming Distance
Number Complement
Binary Number with Alternating Bits
Pyramid Transition Matrix
Prime Number of Set Bits in Binary Representation
Letter Case Permutation
Majority Element
Bitwise AND of Numbers Range
Single Number III
Missing Number
Maximum Product of Word Lengths
Reverse Bits
Number of 1 Bits
Bitwise ORs of Subarrays
Tree
Binary Tree Inorder Traversal
Unique Binary Search Trees II
Unique Binary Search Trees
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
Balanced Binary Tree
Minimum Depth of Binary Tree
Path Sum
Path Sum II
Flatten Binary Tree to Linked List
Populating Next Right Pointers in Each Node
Populating Next Right Pointers in Each Node II
Binary Tree Maximum Path Sum
Sum Root to Leaf Numbers
Binary Tree Preorder Traversal
Binary Tree Postorder Traversal
Binary Search Tree Iterator
House Robber III
Sum of Left Leaves
Path Sum III
Subtree of Another Tree
Serialize and Deserialize BST
Delete Node in a BST
Find Mode in Binary Search Tree
Find Largest Value in Each Tree Row
Most Frequent Subtree Sum
Find Bottom Left Tree Value
Diameter of Binary Tree
Convert BST to Greater Tree
Construct String from Binary Tree
Add One Row to Tree
Two Sum IV - Input is a BST
Binary Tree Tilt
Merge Two Binary Trees
Average of Levels in Binary Tree
Print Binary Tree
Maximum Binary Tree
Maximum Width of Binary Tree
Trim a Binary Search Tree
Second Minimum Node In a Binary Tree
Redundant Connection
Redundant Connection II
Longest Univalue Path
Binary Tree Pruning
Binary Tree Right Side View
Count Complete Tree Nodes
Invert Binary Tree
Lowest Common Ancestor of a Binary Search Tree
Binary Tree Paths
Serialize and Deserialize Binary Tree
Kth Smallest Element in a BST
Find Duplicate Subtrees
Lowest Common Ancestor of a Binary Tree
All Nodes Distance K in Binary Tree
Smallest Subtree with all the Deepest Nodes
N-ary Tree Preorder Traversal
N-ary Tree Postorder Traversal
Maximum Depth of N-ary Tree
Insert into a Binary Search Tree
Search in a Binary Search Tree
Leaf-Similar Trees
Construct Binary Tree from Preorder and Postorder Traversal
All Possible Full Binary Trees
Increasing Order Search Tree
N-ary Tree Level Order Traversal
Depth-first Search
Validate Binary Search Tree
Recover Binary Search Tree
Same Tree
Symmetric Tree
Maximum Depth of Binary Tree
Construct Binary Tree from Preorder and Inorder Traversal
Construct Binary Tree from Inorder and Postorder Traversal
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
Populating Next Right Pointers in Each Node
Populating Next Right Pointers in Each Node II
Binary Tree Maximum Path Sum
Sum Root to Leaf Numbers
Surrounded Regions
Clone Graph
House Robber III
Decode String
Pacific Atlantic Water Flow
Freedom Trail
Concatenated Words
Matchsticks to Square
Target Sum
Increasing Subsequences
Zuma Game
Find Largest Value in Each Tree Row
Remove Boxes
Find Bottom Left Tree Value
Shopping Offers
01 Matrix
Minesweeper
Friend Circles
Strange Printer
Out of Boundary Paths
Employee Importance
24 Game
Redundant Connection II
Max Area of Island
Accounts Merge
Flood Fill
Network Delay Time
Contain Virus
Cracking the Safe
Pyramid Transition Matrix
Swim in Rising Water
Is Graph Bipartite?
Find Eventual Safe States
Making A Large Island
Keys and Rooms
Remove Invalid Parentheses
Course Schedule
Number of Islands
Binary Tree Right Side View
Course Schedule II
Binary Tree Paths
Longest Increasing Path in a Matrix
Loud and Rich
All Nodes Distance K in Binary Tree
Maximum Depth of N-ary Tree
Flatten a Multilevel Doubly Linked List
Leaf-Similar Trees
Reconstruct Itinerary
Increasing Order Search Tree
Possible Bipartition
Shortest Bridge
Breadth-first Search
Symmetric Tree
Binary Tree Level Order Traversal
Binary Tree Zigzag Level Order Traversal
Binary Tree Level Order Traversal II
Minimum Depth of Binary Tree
Word Ladder II
Word Ladder
Surrounded Regions
Clone Graph
Trapping Rain Water II
Pacific Atlantic Water Flow
Find Largest Value in Each Tree Row
Find Bottom Left Tree Value
01 Matrix
Minesweeper
Employee Importance
Cut Off Trees for Golf Event
Network Delay Time
Open the Lock
Sliding Puzzle
Is Graph Bipartite?
Cheapest Flights Within K Stops
Bus Routes
Remove Invalid Parentheses
Course Schedule
Number of Islands
Binary Tree Right Side View
Course Schedule II
Shortest Path Visiting All Nodes
Perfect Squares
Minimum Height Trees
K-Similar Strings
All Nodes Distance K in Binary Tree
Shortest Path to Get All Keys
Maximum Depth of N-ary Tree
Cat and Mouse
N-ary Tree Level Order Traversal
Shortest Bridge
Union Find
Longest Consecutive Sequence
Surrounded Regions
Friend Circles
Redundant Connection
Redundant Connection II
Accounts Merge
Couples Holding Hands
Swim in Rising Water
Bricks Falling When Hit
Number of Islands
Graph
Clone Graph
Evaluate Division
Redundant Connection
Redundant Connection II
Network Delay Time
Couples Holding Hands
Is Graph Bipartite?
Find Eventual Safe States
Keys and Rooms
Course Schedule
Course Schedule II
Minimum Height Trees
K-Similar Strings
Reconstruct Itinerary
Design
LRU Cache
Min Stack
Binary Search Tree Iterator
Flatten Nested List Iterator
Design Twitter
Insert Delete GetRandom O(1)
Insert Delete GetRandom O(1) - Duplicates allowed
All O`one Data Structure
LFU Cache
Implement Trie (Prefix Tree)
Add and Search Word - Data structure design
Implement Stack using Queues
Implement Queue using Stacks
Serialize and Deserialize Binary Tree
Peeking Iterator
Design Linked List
Design Circular Queue
Design HashSet
Design HashMap
Find Median from Data Stream
Design Circular Deque
Topological Sort
Course Schedule
Course Schedule II
Longest Increasing Path in a Matrix
Trie
Palindrome Pairs
Maximum XOR of Two Numbers in an Array
Concatenated Words
Replace Words
Implement Magic Dictionary
Map Sum Pairs
Top K Frequent Words
Longest Word in Dictionary
Prefix and Suffix Search
Implement Trie (Prefix Tree)
Add and Search Word - Data structure design
Word Search II
Binary Indexed Tree
Reverse Pairs
The Skyline Problem
Range Sum Query - Mutable
Count of Smaller Numbers After Self
Segment Tree
Reverse Pairs
Falling Squares
Range Module
My Calendar III
The Skyline Problem
Range Sum Query - Mutable
Count of Smaller Numbers After Self
Rectangle Area II
Binary Search Tree
Data Stream as Disjoint Intervals
Reverse Pairs
Minimum Absolute Difference in BST
Falling Squares
Range Module
My Calendar II
My Calendar III
Minimum Distance Between BST Nodes
Contains Duplicate III
Count of Smaller Numbers After Self
Count of Range Sum
Recursion
Longest Univalue Path
Partition to K Equal Sum Subsets
Number of Atoms
Special Binary String
K-th Symbol in Grammar
Valid Tic-Tac-Toe State
All Possible Full Binary Trees
Brainteaser
Swap Adjacent in LR String
Nim Game
Bulb Switcher
Memoization
Longest Increasing Path in a Matrix
Queue
Max Sum of Rectangle No Larger Than K
Task Scheduler
Shortest Subarray with Sum at Least K
Design Circular Queue
Number of Recent Calls
Design Circular Deque
Minimax
Guess Number Higher or Lower II
Can I Win
Predict the Winner
Guess the Word
Cat and Mouse
Reservoir Sampling
Linked List Random Node
Random Pick Index
Geometry
Erect the Fence
Surface Area of 3D Shapes
Map
Hand of Straights
Exam Room
Array
3Sum
3Sum Closest
4Sum
Remove Duplicates from Sorted Array
Remove Element
Next Permutation
Search in Rotated Sorted Array
Search Insert Position
Combination Sum
Combination Sum II
First Missing Positive
Trapping Rain Water
Jump Game II
Rotate Image
Maximum Subarray
Spiral Matrix
Jump Game
Merge Intervals
Insert Interval
Spiral Matrix II
Unique Paths
Unique Paths II
Minimum Path Sum
Plus One
Set Matrix Zeroes
Search a 2D Matrix
Sort Colors
Subsets
Word Search
Remove Duplicates from Sorted Array II
Search in Rotated Sorted Array II
Largest Rectangle in Histogram
Maximal Rectangle
Merge Sorted Array
Subsets II
Construct Binary Tree from Preorder and Inorder Traversal
Construct Binary Tree from Inorder and Postorder Traversal
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
Word Ladder II
Longest Consecutive Sequence
Insert Delete GetRandom O(1)
Insert Delete GetRandom O(1) - Duplicates allowed
Third Maximum Number
Find All Duplicates in an Array
Find All Numbers Disappeared in an Array
Maximum Product of Three Numbers
Max Consecutive Ones
Teemo Attacking
Maximum Average Subarray I
K-diff Pairs in an Array
Array Partition I
Reshape the Matrix
Subarray Sum Equals K
Array Nesting
Task Scheduler
Can Place Flowers
Shortest Unsorted Continuous Subarray
Valid Triangle Number
Non-decreasing Array
Image Smoother
Maximum Swap
Beautiful Arrangement II
Longest Continuous Increasing Subsequence
Maximum Sum of 3 Non-Overlapping Subarrays
Max Area of Island
Degree of an Array
Best Time to Buy and Sell Stock with Transaction Fee
Subarray Product Less Than K
Range Module
1-bit and 2-bit Characters
Find K-th Smallest Pair Distance
Maximum Length of Repeated Subarray
Find Pivot Index
My Calendar I
My Calendar II
Min Cost Climbing Stairs
Largest Number At Least Twice of Others
Toeplitz Matrix
Max Chunks To Make Sorted II
Max Chunks To Make Sorted
Global and Local Inversions
Transform to Chessboard
Number of Matching Subsequences
Number of Subarrays with Bounded Maximum
Friends Of Appropriate Ages
Positions of Large Groups
Maximum Product Subarray
Find Minimum in Rotated Sorted Array
Find Minimum in Rotated Sorted Array II
Find Peak Element
Two Sum II - Input array is sorted
Majority Element
Image Overlap
Contains Duplicate
Magic Squares In Grid
Find the Duplicate Number
Minimum Size Subarray Sum
Combination Sum III
Contains Duplicate II
Summary Ranges
Majority Element II
Product of Array Except Self
Missing Number
Move Zeroes
Game of Life
Maximize Distance to Closest Person
Find First and Last Position of Element in Sorted Array
Transpose Matrix
Rotate Array
Container With Most Water
Two Sum
Median of Two Sorted Arrays
Length of Longest Fibonacci Subsequence
Fair Candy Swap
Monotonic Array
RLE Iterator
Sum of Subarray Minimums
Sort Array By Parity
X of a Kind in a Deck of Cards
Partition Array into Disjoint Intervals
Sum of Subsequence Widths
Hash Table
4Sum
Substring with Concatenation of All Words
Valid Sudoku
Sudoku Solver
Group Anagrams
Minimum Window Substring
Maximal Rectangle
Binary Tree Inorder Traversal
Single Number
Copy List with Random Pointer
Max Points on a Line
Repeated DNA Sequences
Palindrome Pairs
Top K Frequent Elements
Design Twitter
Insert Delete GetRandom O(1)
Insert Delete GetRandom O(1) - Duplicates allowed
First Unique Character in a String
Find the Difference
Longest Palindrome
Keyboard Row
Encode and Decode TinyURL
Find All Anagrams in a String
Number of Boomerangs
Sort Characters By Frequency
4Sum II
Island Perimeter
Most Frequent Subtree Sum
Contiguous Array
Brick Wall
Subarray Sum Equals K
Distribute Candies
Longest Harmonious Subsequence
Find Duplicate File in System
Minimum Index Sum of Two Lists
Smallest Range
Set Mismatch
Replace Words
Employee Importance
Implement Magic Dictionary
Top K Frequent Words
Maximum Length of Repeated Subarray
Longest Word in Dictionary
Number of Atoms
Daily Temperatures
Shortest Completing Word
Basic Calculator IV
Jewels and Stones
Rabbits in Forest
Subdomain Visit Count
Fraction to Recurring Decimal
Contains Duplicate
Isomorphic Strings
Count Primes
Happy Number
Contains Duplicate II
Valid Anagram
H-Index
Word Pattern
Bulls and Cows
Design HashSet
Design HashMap
Random Pick with Blacklist
Two Sum
Longest Substring Without Repeating Characters
Intersection of Two Arrays
Uncommon Words from Two Sentences
Intersection of Two Arrays II
Maximum Frequency Stack
Linked List
Remove Nth Node From End of List
Merge Two Sorted Lists
Merge k Sorted Lists
Swap Nodes in Pairs
Reverse Nodes in k-Group
Rotate List
Remove Duplicates from Sorted List II
Remove Duplicates from Sorted List
Partition List
Reverse Linked List II
Convert Sorted List to Binary Search Tree
Copy List with Random Pointer
Linked List Cycle
Linked List Cycle II
Reorder List
Insertion Sort List
Sort List
Intersection of Two Linked Lists
Add Two Numbers II
Split Linked List in Parts
Linked List Components
Odd Even Linked List
Reverse Linked List
Remove Linked List Elements
Palindrome Linked List
Delete Node in a Linked List
Flatten a Multilevel Doubly Linked List
Design Linked List
Add Two Numbers
Middle of the Linked List
Math
Reverse Integer
Integer to Roman
Roman to Integer
Divide Two Integers
Multiply Strings
Pow(x, n)
Permutation Sequence
Valid Number
Plus One
Add Binary
Sqrt(x)
Max Points on a Line
Power of Two
Integer to English Words
Self Crossing
Count Numbers with Unique Digits
Super Pow
Rotate Function
Integer Replacement
Nth Digit
Encode and Decode TinyURL
Arithmetic Slices
Arranging Coins
Add Strings
Reconstruct Original Digits from English
Minimum Moves to Equal Array Elements
Minimum Moves to Equal Array Elements II
Maximum Product of Three Numbers
Continuous Subarray Sum
Smallest Good Base
Perfect Number
Super Washing Machines
Complex Number Multiplication
Optimal Division
Valid Square
Fraction Addition and Subtraction
Range Addition II
Sum of Square Numbers
Solve the Equation
Set Mismatch
Maximum Swap
Bulb Switcher II
Self Dividing Numbers
Cracking the Safe
Reach a Number
Global and Local Inversions
Reaching Points
Transform to Chessboard
Rabbits in Forest
Escape The Ghosts
Valid Tic-Tac-Toe State
Chalkboard XOR Game
Largest Triangle Area
String to Integer (atoi)
Consecutive Numbers Sum
Fraction to Recurring Decimal
Excel Sheet Column Title
Excel Sheet Column Number
Factorial Trailing Zeroes
Count Primes
Happy Number
Rectangle Area
Basic Calculator
Number of Digit One
Add Digits
Ugly Number
Ugly Number II
Missing Number
Perfect Squares
Super Ugly Number
Bulb Switcher
Power of Three
Mirror Reflection
Prime Palindrome
Add Two Numbers
Stone Game
Nth Magical Number
Generate Random Point in a Circle
Integer Break
Projection Area of 3D Shapes
Spiral Matrix III
Super Egg Drop
Surface Area of 3D Shapes
Palindrome Number
Water and Jug Problem
Orderly Queue
Numbers At Most N Given Digit Set
Super Palindromes
Valid Perfect Square
Largest Divisible Subset
X of a Kind in a Deck of Cards
Sum of Subsequence Widths
Two Pointers
3Sum
3Sum Closest
4Sum
Remove Nth Node From End of List
Remove Duplicates from Sorted Array
Remove Element
Implement strStr()
Substring with Concatenation of All Words
Trapping Rain Water
Rotate List
Sort Colors
Minimum Window Substring
Remove Duplicates from Sorted Array II
Partition List
Merge Sorted Array
Valid Palindrome
Linked List Cycle
Linked List Cycle II
Reverse Vowels of a String
Longest Word in Dictionary through Deleting
K-diff Pairs in an Array
Permutation in String
Smallest Range
Subarray Product Less Than K
Partition Labels
Most Profit Assigning Work
Unique Letter String
Two Sum II - Input array is sorted
Find the Duplicate Number
Minimum Size Subarray Sum
Palindrome Linked List
Backspace String Compare
Longest Mountain in Array
Move Zeroes
Container With Most Water
Longest Substring Without Repeating Characters
Reverse String
Intersection of Two Arrays
Boats to Save People
Intersection of Two Arrays II
Fruit Into Baskets
String
ZigZag Conversion
Regular Expression Matching
Integer to Roman
Roman to Integer
Longest Common Prefix
Letter Combinations of a Phone Number
Valid Parentheses
Generate Parentheses
Implement strStr()
Substring with Concatenation of All Words
Longest Valid Parentheses
Multiply Strings
Wildcard Matching
Group Anagrams
Length of Last Word
Valid Number
Add Binary
Text Justification
Simplify Path
Edit Distance
Minimum Window Substring
Scramble String
Decode Ways
Restore IP Addresses
Interleaving String
Distinct Subsequences
Valid Palindrome
Word Ladder II
Reverse Words in a String
Compare Version Numbers
Integer to English Words
Palindrome Pairs
Reverse Vowels of a String
Ransom Note
Mini Parser
First Unique Character in a String
String Compression
Number of Segments in a String
Validate IP Address
Detect Capital
Longest Uncommon Subsequence I
Longest Uncommon Subsequence II
Complex Number Multiplication
Minimum Time Difference
Reverse String II
Construct String from Binary Tree
Next Greater Element III
Student Attendance Record I
Optimal Division
Delete Operation for Two Strings
Reverse Words in a String III
Find the Closest Palindrome
Tag Validator
Find Duplicate File in System
Palindromic Substrings
Smallest Range
Valid Parenthesis String
Valid Palindrome II
Count Binary Substrings
Remove Comments
Count Different Palindromic Subsequences
Parse Lisp Expression
Special Binary String
Basic Calculator IV
Reorganize String
Rotated Digits
Custom Sort String
Expressive Words
Ambiguous Coordinates
String to Integer (atoi)
Goat Latin
Masking Personal Information
Split Array into Fibonacci Sequence
Shortest Palindrome
Basic Calculator II
Shifting Letters
Score of Parentheses
To Lower Case
Longest Substring Without Repeating Characters
Longest Palindromic Substring
Repeated String Match
Repeated Substring Pattern
Reverse String
Find and Replace Pattern
Groups of Special-Equivalent Strings
Buddy Strings
Orderly Queue
Robot Return to Origin
Count and Say
Word Subsets
Most Common Word
Stamping The Sequence
Binary Search
Divide Two Integers
Search in Rotated Sorted Array
Search Insert Position
Pow(x, n)
Sqrt(x)
Search a 2D Matrix
Search in Rotated Sorted Array II
Russian Doll Envelopes
Max Sum of Rectangle No Larger Than K
Guess Number Higher or Lower
Kth Smallest Element in a Sorted Matrix
Is Subsequence
Split Array Largest Sum
Arranging Coins
Find Right Interval
4Sum II
Heaters
Smallest Good Base
Find K Closest Elements
Kth Smallest Number in Multiplication Table
Find K-th Smallest Pair Distance
Maximum Length of Repeated Subarray
Find Smallest Letter Greater Than Target
Swim in Rising Water
K-th Smallest Prime Fraction
Preimage Size of Factorial Zeroes Function
Find Minimum in Rotated Sorted Array
Find Minimum in Rotated Sorted Array II
Find Peak Element
Two Sum II - Input array is sorted
Dungeon Game
Find the Duplicate Number
Minimum Size Subarray Sum
Count Complete Tree Nodes
H-Index II
First Bad Version
Longest Increasing Subsequence
Kth Smallest Element in a BST
Search a 2D Matrix II
Peak Index in a Mountain Array
Shortest Subarray with Sum at Least K
Find First and Last Position of Element in Sorted Array
Binary Search
Random Pick with Blacklist
Median of Two Sorted Arrays
Nth Magical Number
Random Pick with Weight
Random Point in Non-overlapping Rectangles
Intersection of Two Arrays
Super Egg Drop
Intersection of Two Arrays II
Koko Eating Bananas
Valid Perfect Square
Divide and Conquer
Merge k Sorted Lists
Maximum Subarray
Freedom Trail
Reverse Pairs
Majority Element
Kth Largest Element in an Array
The Skyline Problem
Different Ways to Add Parentheses
Expression Add Operators
Burst Balloons
Count of Smaller Numbers After Self
Count of Range Sum
Search a 2D Matrix II
Median of Two Sorted Arrays
Valid Permutations for DI Sequence
Dynamic Programming
Regular Expression Matching
Longest Valid Parentheses
Wildcard Matching
Maximum Subarray
Unique Paths
Unique Paths II
Minimum Path Sum
Climbing Stairs
Edit Distance
Maximal Rectangle
Scramble String
Decode Ways
Unique Binary Search Trees II
Unique Binary Search Trees
Interleaving String
Distinct Subsequences
Triangle
Best Time to Buy and Sell Stock
Best Time to Buy and Sell Stock III
Palindrome Partitioning II
Word Break
Word Break II
Counting Bits
Russian Doll Envelopes
Count Numbers with Unique Digits
Max Sum of Rectangle No Larger Than K
Guess Number Higher or Lower II
Combination Sum IV
Is Subsequence
Frog Jump
Split Array Largest Sum
Arithmetic Slices
Partition Equal Subset Sum
Arithmetic Slices II - Subsequence
Can I Win
Freedom Trail
Count The Repetitions
Unique Substrings in Wraparound String
Ones and Zeroes
Concatenated Words
Target Sum
Continuous Subarray Sum
Predict the Winner
Remove Boxes
Shopping Offers
Longest Palindromic Subsequence
Super Washing Machines
Non-negative Integers without Consecutive Ones
Student Attendance Record II
Strange Printer
Out of Boundary Paths
K Inverse Pairs Array
Palindromic Substrings
Decode Ways II
Maximum Length of Pair Chain
2 Keys Keyboard
Number of Longest Increasing Subsequence
Knight Probability in Chessboard
Maximum Sum of 3 Non-Overlapping Subarrays
Stickers to Spell Word
Partition to K Equal Sum Subsets
Best Time to Buy and Sell Stock with Transaction Fee
Minimum ASCII Delete Sum for Two Strings
Maximum Length of Repeated Subarray
Count Different Palindromic Subsequences
Delete and Earn
Cherry Pickup
Min Cost Climbing Stairs
Largest Plus Sign
Cheapest Flights Within K Stops
Domino and Tromino Tiling
Minimum Swaps To Make Sequences Increasing
Soup Servings
Largest Sum of Averages
Race Car
Maximum Product Subarray
Dungeon Game
Coin Change
House Robber
House Robber II
Maximal Square
Ugly Number II
Shortest Path Visiting All Nodes
Perfect Squares
Longest Increasing Subsequence
Range Sum Query - Immutable
Range Sum Query 2D - Immutable
Best Time to Buy and Sell Stock with Cooldown
Burst Balloons
Create Maximum Number
Best Time to Buy and Sell Stock IV
Longest Palindromic Substring
Length of Longest Fibonacci Subsequence
Stone Game
Profitable Schemes
Integer Break
Super Egg Drop
Bitwise ORs of Subarrays
Numbers At Most N Given Digit Set
Valid Permutations for DI Sequence
Largest Divisible Subset
Wiggle Subsequence
Knight Dialer
Backtracking
Regular Expression Matching
Letter Combinations of a Phone Number
Generate Parentheses
Sudoku Solver
Combination Sum
Combination Sum II
Wildcard Matching
Permutations
Permutations II
N-Queens
N-Queens II
Permutation Sequence
Combinations
Subsets
Word Search
Subsets II
Restore IP Addresses
Word Ladder II
Palindrome Partitioning
Word Break II
Count Numbers with Unique Digits
Binary Watch
Beautiful Arrangement
Stickers to Spell Word
Letter Case Permutation
Additive Number
Add and Search Word - Data structure design
Word Search II
Combination Sum III
Gray Code
Random
Random Pick with Blacklist
Implement Rand10() Using Rand7()
Generate Random Point in a Circle
Random Pick with Weight
Random Flip Matrix
Random Point in Non-overlapping Rectangles
Rejection Sampling
Implement Rand10() Using Rand7()
Generate Random Point in a Circle
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Minimax
题目列表
题目
难度
Guess Number Higher or Lower II
中等
Can I Win
中等
Predict the Winner
中等
Guess the Word
困难
Cat and Mouse
困难
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