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LeetCode Algorithm Problems

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LeetCode Solutions https://leetcode.com/problemset/algorithms/

Problem C/C++ Java Python3
New Playgroundhaifengc Unique Morse Code Words java
01 Matrix java
1-bit and 2-bit Characters java
2 Keys Keyboard java
3Sum cpp java
3Sum Closest cpp
3Sum Smaller cpp java
4 Keys Keyboard java
4Sum cpp java
4Sum II java
Accounts Merge java
Add Binary cpp
Add Bold Tag in String java
Add Digits cpp
Add One Row to Tree java
Add Two Numbers cpp java python
Add Two Numbers II java
Add and Search Word - Data structure design cpp java
Alien Dictionary cpp java
All Paths From Source to Target java
Android Unlock Patterns java
Array Nesting java
Array Partition I java
Average of Levels in Binary Tree java
Balanced Binary Tree cpp
Base 7 java
Basic Calculator cpp java
Basic Calculator II cpp java
Battleships in a Board java
Best Meeting Point cpp
Best Time to Buy and Sell Stock cpp java
Best Time to Buy and Sell Stock II cpp java
Best Time to Buy and Sell Stock with Cooldown java
Binary Number with Alternating Bits java
Binary Search Tree Iterator cpp java
Binary Tree Inorder Traversal cpp java
Binary Tree Level Order Traversal cpp
Binary Tree Level Order Traversal II cpp
Binary Tree Longest Consecutive Sequence cpp java
Binary Tree Longest Consecutive Sequence II java
Binary Tree Maximum Path Sum cpp java
Binary Tree Paths cpp
Binary Tree Postorder Traversal cpp
Binary Tree Preorder Traversal cpp
Binary Tree Right Side View cpp
Binary Tree Tilt java
Binary Tree Upside Down cpp
Binary Tree Upside Down.c cpp
Binary Tree Vertical Order Traversal java
Binary Tree Zigzag Level Order Traversal cpp
Binary Watch java
Bitwise AND of Numbers Range cpp
Bold Words in String java
Boundary of Binary Tree java
Bulb Switcher cpp
Bulls and Cows cpp
Can Place Flowers java
Candy cpp
Champagne Tower java
Climbing Stairs cpp java
Clone Graph cpp java
Closest Binary Search Tree Value cpp java
Closest Binary Search Tree Value II cpp
Closest Leaf in a Binary Tree java
Coin Change cpp java
Coin Change 2 java
Coin Path java
Combination Sum cpp
Combination Sum II cpp
Combination Sum III cpp
Combinations cpp
Compare Version Numbers cpp
Complex Number Multiplication java
Construct Binary Tree from Inorder and Postorder Traversal cpp
Construct Binary Tree from Preorder and Inorder Traversal cpp
Construct Binary Tree from String java
Construct String from Binary Tree java
Container With Most Water cpp java
Contains Duplicate cpp java
Contains Duplicate II cpp java
Contains Duplicate III cpp java
Contiguous Array java
Continuous Subarray Sum java
Convert Sorted Array to Binary Search Tree cpp java
Convert Sorted List to Binary Search Tree cpp java
Copy List with Random Pointer java
Count Complete Tree Nodes cpp
Count Numbers with Unique Digits cpp
Count Primes cpp java
Count Univalue Subtrees cpp
Count and Say cpp java
Count of Range Sum java
Count of Smaller Numbers After Self cpp java
Counting Bits java
Couples Holding Hands java
Course Schedule cpp java
Course Schedule II cpp
Course Schedule III java
Custom Sort String java
Cut Off Trees for Golf Event java
Daily Temperatures java
Decode Ways cpp
Decode Ways II java
Delete Node in a Linked List cpp java
Delete Operation for Two Strings java
Design Compressed String Iterator java
Design Excel Sum Formula java
Design In-Memory File System java
Design Log Storage System java
Design Phone Directory java
Design Search Autocomplete System java
Design Snake Game java
Design Tic-Tac-Toe java
Diagonal Traverse java
Diameter of Binary Tree java
Distinct Subsequences cpp
Distribute Candies java
Divide Two Integers cpp java
Dota2 Senate java
Edit Distance cpp
Employee Free Time java
Employee Importance java
Encode and Decode Strings cpp java
Encode and Decode TinyURL java
Erect the Fence java
Escape The Ghosts java
Evaluate Reverse Polish Notation cpp
Excel Sheet Column Number cpp java
Excel Sheet Column Title cpp java
Exclusive Time of Functions java
Expression Add Operators java
Expressive Words java
Factor Combinations cpp java
Factorial Trailing Zeroes cpp java
Find Anagram Mappings java
Find Duplicate File in System java
Find Duplicate Subtrees java
Find Eventual Safe States java
Find K Closest Elements java
Find K Pairs with Smallest Sums java
Find K-th Smallest Pair Distance java
Find Median from Data Stream cpp java
Find Minimum in Rotated Sorted Array cpp java
Find Minimum in Rotated Sorted Array II cpp java
Find Peak Element cpp
Find Permutation java
Find Smallest Letter Greater Than Target java
Find the Celebrity cpp java
Find the Derangement of An Array java
Find the Difference java
Find the Duplicate Number cpp
First Bad Version cpp
First Bad Version.c cpp
First Missing Positive cpp java
First Unique Character in a String java
Fizz Buzz java
Flatten 2D Vector cpp java
Flatten Binary Tree to Linked List cpp java
Flatten Nested List Iterator java
Flip Game cpp
Flip Game II cpp
Fraction Addition and Subtraction java
Fraction to Recurring Decimal cpp java
Game of Life cpp java
Gas Station cpp
Generate Parentheses cpp java
Global and Local Inversions java
Graph Valid Tree cpp java
Group Anagrams cpp java
Group Shifted Strings cpp java
H-Index cpp java
H-Index II cpp java
Hamming Distance java
Happy Number cpp java
House Robber cpp java
House Robber II cpp java
House Robber III cpp java
IPO java
Implement Magic Dictionary java
Implement Queue using Stacks cpp
Implement Stack using Queues cpp
Implement Trie (Prefix Tree) cpp java
Implement strStr() cpp java
Inorder Successor in BST cpp java
Insert Delete GetRandom O(1) java
Insert Delete GetRandom O(1) - Duplicates allowed java
Insert Interval cpp
Insertion Sort List cpp
Integer to English Words cpp java
Integer to Roman cpp
Interleaving String cpp
Intersection of Two Arrays java
Intersection of Two Arrays II java
Intersection of Two Linked Lists cpp java
Invert Binary Tree cpp
Is Graph Bipartite java
Island Perimeter java
Isomorphic Strings cpp
Jewels and Stones java
Judge Route Circle java
Jump Game cpp
Jump Game II cpp
K Empty Slots java
K Inverse Pairs Array java
K-th Smallest Prime Fraction java
Kill Process java
Knight Probability in Chessboard java
Kth Largest Element in an Array cpp java
Kth Smallest Element in a BST cpp java
Kth Smallest Element in a Sorted Matrix java
LFU Cache java
LRU Cache cpp java
Largest BST Subtree cpp
Largest Number cpp
Largest Plus Sign java
Largest Rectangle in Histogram cpp
Length of Last Word cpp
Letter Case Permutation java
Letter Combinations of a Phone Number cpp java
License Key Formatting java
Linked List Cycle cpp java
Logger Rate Limiter java
Longest Common Prefix cpp java
Longest Consecutive Sequence cpp java
Longest Continuous Increasing Subsequence java
Longest Harmonious Subsequence java
Longest Increasing Path in a Matrix cpp
Longest Increasing Subsequence cpp
Longest Palindromic Subsequence java
Longest Palindromic Substring cpp java
Longest Substring Without Repeating Characters cpp java
Longest Substring with At Least K Repeating Characters java
Longest Substring with At Most K Distinct Characters java
Longest Substring with At Most Two Distinct Characters cpp
Longest Univalue Path java
Longest Valid Parentheses cpp
Lowest Common Ancestor of a Binary Search Tree cpp
Lowest Common Ancestor of a Binary Tree cpp java
Magical String java
Majority Element cpp java
Majority Element II cpp
Map Sum Pairs java
Matchsticks to Square java
Max Area of Island java
Max Chunks To Make Sorted (ver. 1) java
Max Chunks to Make Sorted (ver. 2) java
Max Consecutive Ones II java
Max Increase to Keep City Skyline java
Max Points on a Line cpp
Maximal Rectangle cpp
Maximal Square cpp
Maximum Average Subarray I java
Maximum Average Subarray II java
Maximum Binary Tree java
Maximum Depth of Binary Tree cpp java
Maximum Distance in Arrays java
Maximum Length of Pair Chain java
Maximum Length of Repeated Subarray java
Maximum Product Subarray cpp java
Maximum Product of Three Numbers java
Maximum Product of Word Lengths java
Maximum Size Subarray Sum Equals k cpp
Maximum Subarray cpp java
Maximum Vacation Days java
Median of Two Sorted Arrays cpp java
Meeting Rooms cpp java
Meeting Rooms II cpp java
Merge Intervals cpp
Merge Sorted Array cpp java
Merge Two Binary Trees java
Merge Two Sorted Lists cpp java
Merge k Sorted Lists cpp java
Min Cost Climbing Stairs java
Min Stack cpp java
Minesweeper java
Minimize Max Distance to Gas Station java
Minimum ASCII Delete Sum for Two Strings java
Minimum Depth of Binary Tree cpp
Minimum Distance Between BST Nodes java
Minimum Factorization java
Minimum Genetic Mutation cpp
Minimum Index Sum of Two Lists java
Minimum Number of Arrows to Burst Balloons java
Minimum Path Sum cpp
Minimum Size Subarray Sum cpp
Minimum Time Difference java
Minimum Unique Word Abbreviation java
Minimum Window Substring cpp
Missing Number cpp java
Missing Ranges cpp
Monotone Increasing Digits java
Move Zeroes cpp java
Moving Average from Data Stream java
Multiply Strings cpp java
N-Queens cpp
N-Queens II cpp
Nested List Weight Sum java
Nested List Weight Sum II java
Network Delay Time java
Next Closest Time java
Next Greater Element III java
Next Permutation cpp
Nim Game cpp java
Non-negative Integers without Consecutive Ones java
Nth Digit java
Number Of Corner Rectangles java
Number of 1 Bits cpp java
Number of Connected Components in an Undirected Graph cpp
Number of Distinct Islands java
Number of Islands cpp
Number of Islands II cpp java
Number of Lines To Write String java
Number of Longest Increasing Subsequence java
Number of Matching Subsequences java
Number of Subarrays with Bounded Maximum java
Odd Even Linked List cpp java
One Edit Distance cpp java
Open the Lock java
Optimal Account Balancing java
Out of Boundary Paths java
Output Contest Matches java
Paint Fence cpp java
Paint House cpp java
Paint House II cpp java
Palindrome Linked List cpp java
Palindrome Number cpp java
Palindrome Pairs cpp
Palindrome Partitioning cpp
Palindrome Partitioning II cpp
Palindrome Permutation cpp java
Palindrome Permutation II cpp
Palindromic Substrings java
Partition Labels java
Partition List cpp java
Pascal's Triangle cpp java
Pascal's Triangle II cpp
Path Sum cpp
Path Sum II cpp
Peeking Iterator cpp java
Perfect Number java
Perfect Rectangle java
Perfect Squares cpp
Permutation Sequence cpp
Permutation in String java
Permutations cpp java
Permutations II cpp
Plus One cpp java
Plus One Linked List java
Populating Next Right Pointers in Each Node cpp java
Populating Next Right Pointers in Each Node II cpp java
Pow(x, n) cpp java
Power of Three cpp java
Power of Two cpp
Preimage Size of Factorial Zeroes Function java
Prime Number of Set Bits in Binary Representation java
Print Binary Tree java
Product of Array Except Self cpp java
Rabbits in Forest java
Random Pick Index java
Range Addition II java
Range Sum Query - Immutable cpp
Range Sum Query - Mutable cpp
Range Sum Query 2D - Immutable cpp
Range Sum Query 2D - Mutable java
Read N Characters Given Read4 cpp java
Read N Characters Given Read4 II - Call multiple times cpp java
Rectangle Area cpp
Redundant Connection java
Regular Expression Matching cpp java
Remove 9 java
Remove Duplicates from Sorted Array cpp java
Remove Duplicates from Sorted Array II cpp
Remove Duplicates from Sorted List cpp java
Remove Duplicates from Sorted List II cpp
Remove Element cpp java
Remove Invalid Parentheses cpp java
Remove Linked List Elements cpp java
Remove Nth Node From End of List cpp
Reorder List cpp java
Reorganize String java
Repeated DNA Sequences cpp
Repeated String Match java
Replace Words java
Reshape the Matrix java
Restore IP Addresses java
Reverse Bits cpp java
Reverse Integer cpp java
Reverse Linked List cpp java
Reverse Linked List II cpp java
Reverse Nodes in k-Group cpp java
Reverse Pairs java
Reverse String java
Reverse String II java
Reverse Words in a String cpp
Reverse Words in a String II cpp
Roman to Integer cpp java
Rotate Array cpp java
Rotate Image cpp
Rotate List cpp java
Rotate String java
Rotated Digits java
Russian Doll Envelopes java
Same Tree cpp
Search Insert Position cpp
Search a 2D Matrix cpp java
Search a 2D Matrix II cpp java
Search for a Range cpp java
Search in Rotated Sorted Array cpp java
Search in Rotated Sorted Array II cpp java
Serialize and Deserialize BST java
Serialize and Deserialize Binary Tree cpp java
Set Matrix Zeroes cpp
Set Mismatch java
Shopping Offers java
Shortest Completing Word java
Shortest Distance from All Buildings java
Shortest Unsorted Continuous Subarray java
Shortest Word Distance cpp
Shortest Word Distance II cpp
Shortest Word Distance III cpp
Shuffle an Array java
Similar RGB Color java
Simplify Path cpp java
Single Number java python
Single Number II cpp
Single Number III cpp
Sliding Puzzle java
Sliding Window Median java
Smallest Range java
Smallest Rectangle Enclosing Black Pixels cpp java
Solve the Equation java
Sort Colors cpp
Sort List cpp java
Sort Transformed Array java
Soup Servings java
Spiral Matrix cpp java
Spiral Matrix II cpp
Split Array into Consecutive Subsequences java
Sqrt(x) cpp java
Squirrel Simulation java
String Compression java
String to Integer (atoi) java
Strobogrammatic Number cpp
Strobogrammatic Number II cpp
Student Attendance Record II java
Subarray Sum Equals K java
Subdomain Visit Count java
Subsets cpp
Subsets II cpp
Substring with Concatenation of All Words cpp
Subtree of Another Tree java
Sudoku Solver cpp java
Sum Root to Leaf Numbers cpp
Sum of Square Numbers java
Sum of Two Integers java
Summary Ranges cpp
Surrounded Regions cpp
Swap Nodes in Pairs cpp java
Swim in Rising Water java
Symmetric Tree cpp java
Tag Validator java
Task Scheduler java
The Maze java
The Skyline Problem cpp
Toeplitz Matrix java
Top K Frequent Elements java
Top K Frequent Words java
Trapping Rain Water cpp java
Triangle cpp
Two Sum cpp java
Two Sum II - Input array is sorted cpp java
Two Sum III - Data structure design cpp java
Two Sum IV - Input is a BST java
Ugly Number cpp python
Ugly Number II cpp
Unique Binary Search Trees cpp java
Unique Binary Search Trees II cpp
Unique Paths cpp java
Unique Paths II cpp
Unique Word Abbreviation cpp
Valid Anagram cpp java
Valid Palindrome cpp java
Valid Palindrome II java
Valid Parentheses cpp java
Valid Parenthesis String java
Valid Square java
Valid Sudoku cpp java
Valid Tic-Tac-Toe State java
Valid Triangle Number java
Validate Binary Search Tree cpp java
Verify Preorder Serialization of a Binary Tree cpp java
Walls and Gates cpp
Wiggle Sort cpp java
Wildcard Matching cpp java
Word Abbreviation java
Word Break cpp
Word Break II cpp
Word Ladder cpp
Word Ladder II cpp
Word Pattern cpp
Word Pattern II cpp
Word Search cpp
Word Search II cpp
Word Squares java
Zigzag Iterator cpp
ceilFloorIndex java

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LeetCode Algorithm Problems

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