Java LeetCode Typing Practice

1710 LeetCode solutions in Java. Pick one to type it and see your WPM and accuracy.

01 Matrix · 61 lines
132 Pattern · 17 lines
1-bit and 2-bit Characters · 11 lines
24 Game · 39 lines
2 Keys Keyboard · 18 lines
3Sum With Multiplicity · 33 lines
4Sum · 47 lines
4Sum II · 9 lines
Accounts Merge · 91 lines
Add Binary · 17 lines
Add Digits · 7 lines
Adding Spaces to a String · 13 lines
Adding Two Negabinary Numbers · 57 lines
Additive Number · 35 lines
Add Minimum Number of Rungs · 13 lines
Add One Row to Tree · 13 lines
Add Strings · 7 lines
Add to Array-Form of Integer · 16 lines
Add Two Integers · 14 lines
Add Two Numbers · 27 lines
Add Two Numbers II · 39 lines
Advantage Shuffle · 20 lines
Airplane Seat Assignment Probability · 7 lines
Alert Using Same Key-Card Three or More Times in a One Hour Period · 52 lines
All Divisions With the Highest Score of a Binary Array · 26 lines
All Elements in Two Binary Search Trees · 29 lines
All Nodes Distance K in Binary Tree · 53 lines
Allocate Mailboxes · 28 lines
All O`one Data Structure · 231 lines
All Paths From Source to Target · 40 lines
All Possible Full Binary Trees · 39 lines
Alphabet Board Path · 29 lines
Ambiguous Coordinates · 77 lines
Angle Between Hands of a Clock · 14 lines
A Number After a Double Reversal · 5 lines
Apply Discount Every n Orders · 34 lines
Apply Discount to Prices · 22 lines
Arithmetic Slices · 23 lines
Arithmetic Slices II - Subsequence · 32 lines
Arithmetic Subarrays · 28 lines
Arranging Coins · 16 lines
Array Nesting · 19 lines
Array of Doubled Pairs · 27 lines
Array Partition · 10 lines
Array With Elements Not Equal to Average of Neighbors · 12 lines
As Far from Land as Possible · 60 lines
Assign Cookies · 24 lines
Asteroid Collision · 58 lines
Available Captures for Rook · 67 lines
Average of Levels in Binary Tree · 17 lines
Average Salary Excluding the Minimum and Maximum Salary · 14 lines
Average Waiting Time · 14 lines
Avoid Flood in The City · 25 lines
Backspace String Compare · 28 lines
Bag of Tokens · 25 lines
Balance a Binary Search Tree · 30 lines
Balanced Binary Tree · 29 lines
Base 7 · 20 lines
Baseball Game · 27 lines
Basic Calculator · 25 lines
Basic Calculator II · 32 lines
Basic Calculator IV · 179 lines
Battleships in a Board · 23 lines
Beautiful Arrangement · 24 lines
Beautiful Arrangement II · 16 lines
Best Poker Hand · 15 lines
Best Position for a Service Centre · 54 lines
Best Sightseeing Pair · 54 lines
Best Team With No Conflicts · 35 lines
Best Time to Buy and Sell Stock · 18 lines
Best Time to Buy and Sell Stock II · 11 lines
Best Time to Buy and Sell Stock III · 35 lines
Best Time to Buy and Sell Stock IV · 41 lines
Best Time to Buy and Sell Stock with Cooldown · 24 lines
Best Time to Buy and Sell Stock with Transaction Fee · 30 lines
Binary Gap · 14 lines
Binary Number with Alternating Bits · 13 lines
Binary Prefix Divisible By 5 · 12 lines
Binary Search · 24 lines
Binary Search Tree Iterator · 41 lines
Binary Search Tree to Greater Sum Tree · 13 lines
Binary String With Substrings Representing 1 To N · 9 lines
Binary Subarrays With Sum · 24 lines
Binary Tree Cameras · 30 lines
Binary Tree Coloring Game · 29 lines
Binary Tree Inorder Traversal · 19 lines
Binary Tree Level Order Traversal · 29 lines
Binary Tree Level Order Traversal II · 28 lines
Binary Tree Maximum Path Sum · 31 lines
Binary Tree Paths · 23 lines
Binary Tree Postorder Traversal · 20 lines
Binary Tree Preorder Traversal · 20 lines
Binary Tree Pruning · 12 lines
Binary Tree Right Side View · 41 lines
Binary Trees With Factors · 44 lines
Binary Tree Tilt · 16 lines
Binary Tree Zigzag Level Order Traversal · 40 lines
Bitwise AND of Numbers Range · 11 lines
Bitwise ORs of Subarrays · 24 lines
Boats to Save People · 22 lines
Booking Concert Tickets in Groups · 114 lines
Brace Expansion II · 127 lines
Break a Palindrome · 30 lines
Bricks Falling When Hit · 71 lines
Brick Wall · 35 lines
Broken Calculator · 9 lines
Buddy Strings · 42 lines
Build an Array With Stack Operations · 16 lines
Build Array from Permutation · 9 lines
Build Array Where You Can Find The Maximum Exactly K Comparisons · 31 lines
Building Boxes · 52 lines
Bulb Switcher · 5 lines
Bulb Switcher II · 17 lines
Bulls and Cows · 26 lines
Burst Balloons · 38 lines
Calculate Amount Paid in Taxes · 21 lines
Calculate Digit Sum of a String · 16 lines
Calculate Money in Leetcode Bank · 18 lines
Camelcase Matching · 25 lines
Can Convert String in K Moves · 34 lines
Candy · 29 lines
Can I Win · 35 lines
Can Make Arithmetic Progression From Sequence · 13 lines
Can Make Palindrome from Substring · 41 lines
Can Place Flowers · 19 lines
Can You Eat Your Favorite Candy on Your Favorite Day? · 29 lines
Capacity To Ship Packages Within D Days · 42 lines
Capitalize the Title · 29 lines
Car Fleet · 36 lines
Car Fleet II · 65 lines
Car Pooling · 21 lines
Cat and Mouse · 43 lines
Cat and Mouse II · 96 lines
Cells in a Range on an Excel Sheet · 15 lines
Cells with Odd Values in a Matrix · 51 lines
Chalkboard XOR Game · 12 lines
Champagne Tower · 25 lines
Change Minimum Characters to Satisfy One of Three Conditions · 31 lines
Cheapest Flights Within K Stops · 49 lines
Check Array Formation Through Concatenation · 18 lines
Check Completeness of a Binary Tree · 20 lines
Check if All A's Appears Before All B's · 14 lines
Check if All Characters Have Equal Number of Occurrences · 12 lines
Check if All the Integers in a Range Are Covered · 17 lines
Check if an Original String Exists Given Two Encoded Strings · 108 lines
Check if a Parentheses String Can Be Valid · 34 lines
Check if Array Is Sorted and Rotated · 14 lines
Check If Array Pairs Are Divisible by k · 15 lines
Check If a String Can Break Another String · 22 lines
Check If a String Contains All Binary Codes of Size K · 10 lines
Check If a Word Occurs As a Prefix of Any Word in a Sentence · 24 lines
Check if Binary String Has at Most One Segment of Ones · 5 lines
Check if Every Row and Column Contains All Numbers · 26 lines
Check If It Is a Good Array · 18 lines
Check If It Is a Straight Line · 28 lines
Check if Matrix Is X-Matrix · 14 lines
Check if Move is Legal · 29 lines
Check If N and Its Double Exist · 11 lines
Check if Number Has Equal Digit Count and Digit Value · 20 lines
Check if Number is a Sum of Powers of Three · 29 lines
Check if Numbers Are Ascending in a Sentence · 18 lines
Check if One String Swap Can Make Strings Equal · 17 lines
Check If String Is a Prefix of Array · 11 lines
Check If String Is Transformable With Substring Sort Operations · 52 lines
Check if There Is a Valid Parentheses String Path · 49 lines
Check if There is a Valid Partition For The Array · 19 lines
Check if There is a Valid Path in a Grid · 56 lines
Check if the Sentence Is Pangram · 10 lines
Check If Two String Arrays are Equivalent · 5 lines
Check if Word Can Be Placed In Crossword · 92 lines
Check if Word Equals Summation of Two Words · 19 lines
Check If Word Is Valid After Substitutions · 43 lines
Checking Existence of Edge Length Limited Paths · 54 lines
Check Whether Two Strings are Almost Equivalent · 15 lines
Cherry Pickup · 41 lines
Cinema Seat Allocation · 42 lines
Circle and Rectangle Overlapping · 8 lines
Circular Array Loop · 35 lines
Circular Permutation in Binary Representation · 25 lines
Climbing Stairs · 19 lines
Clone Graph · 64 lines
Closest Dessert Cost · 29 lines
Closest Divisors · 61 lines
Closest Room · 40 lines
Closest Subsequence Sum · 66 lines
Coin Change · 32 lines
Coin Change 2 · 13 lines
Coloring A Border · 41 lines
Combinations · 19 lines
Combination Sum · 30 lines
Combination Sum II · 43 lines
Combination Sum III · 35 lines
Combination Sum IV · 21 lines
Compare Strings by Frequency of the Smallest Character · 46 lines
Compare Version Numbers · 49 lines
Complement of Base 10 Integer · 11 lines
Complete Binary Tree Inserter · 61 lines
Complex Number Multiplication · 10 lines
Concatenated Words · 51 lines
Concatenation of Array · 10 lines
Concatenation of Consecutive Binary Numbers · 9 lines
Consecutive Characters · 23 lines
Consecutive Numbers Sum · 17 lines
Constrained Subsequence Sum · 23 lines
Construct Binary Search Tree from Preorder Traversal · 19 lines
Construct Binary Tree from Inorder and Postorder Traversal · 25 lines
Construct Binary Tree from Preorder and Inorder Traversal · 24 lines
Construct Binary Tree from Preorder and Postorder Traversal · 31 lines
Construct K Palindrome Strings · 25 lines
Construct Quad Tree · 87 lines
Construct String With Repeat Limit · 46 lines
Construct Target Array With Multiple Sums · 30 lines
Construct the Lexicographically Largest Valid Sequence · 40 lines
Construct the Rectangle · 20 lines
Contains Duplicate · 10 lines
Contains Duplicate II · 12 lines
Contains Duplicate III · 49 lines
Contain Virus · 110 lines
Continuous Subarray Sum · 29 lines
Convert 1D Array Into 2D Array · 17 lines
Convert a Number to Hexadecimal · 27 lines
Convert Binary Number in a Linked List to Integer · 37 lines
Convert BST to Greater Tree · 46 lines
Convert Integer to the Sum of Two No-Zero Integers · 10 lines
Convert Sorted Array to Binary Search Tree · 12 lines
Convert Sorted List to Binary Search Tree · 28 lines
Convert to Base -2 · 9 lines
Coordinate With Maximum Network Quality · 28 lines
Copy List with Random Pointer · 42 lines
Corporate Flight Bookings · 52 lines
Count All Possible Routes · 58 lines
Count All Valid Pickup and Delivery Options · 10 lines
Count and Say · 42 lines
Count Array Pairs Divisible by K · 36 lines
Count Artifacts That Can Be Extracted · 18 lines
Count Asterisks · 15 lines
Count Binary Substrings · 17 lines
Count Collisions on a Road · 30 lines
Count Common Words With One Occurrence · 13 lines
Count Complete Tree Nodes · 24 lines
Count Different Palindromic Subsequences · 43 lines
Count Elements With Strictly Smaller and Greater Elements · 15 lines
Count Equal and Divisible Pairs in an Array · 21 lines
Count Fertile Pyramids in a Land · 24 lines
Count Good Meals · 21 lines
Count Good Nodes in Binary Tree · 19 lines
Count Good Numbers · 30 lines
Count Good Triplets · 19 lines
Count Good Triplets in an Array · 57 lines
Count Hills and Valleys in an Array · 24 lines
Counting Bits · 16 lines
Counting Words With a Given Prefix · 9 lines
Count Integers in Intervals · 94 lines
Count Integers With Even Digit Sum · 16 lines
Count Items Matching a Rule · 13 lines
Count Largest Group · 31 lines
Count Lattice Points Inside a Circle · 17 lines
Count Negative Numbers in a Sorted Matrix · 18 lines
Count Nice Pairs in an Array · 30 lines
Count Nodes Equal to Average of Subtree · 26 lines
Count Nodes With the Highest Score · 82 lines
Count Number of Bad Pairs · 16 lines
Count Number of Homogenous Substrings · 14 lines
Count Number of Maximum Bitwise-OR Subsets · 31 lines
Count Number of Nice Subarrays · 48 lines
Count Number of Pairs With Absolute Difference K · 18 lines
Count Number of Rectangles Containing Each Point · 61 lines
Count Number of Special Subsequences · 18 lines
Count Number of Teams · 35 lines
Count Number of Texts · 26 lines
Count Number of Ways to Place Houses · 21 lines
Count Numbers with Unique Digits · 23 lines
Count Odd Numbers in an Interval Range · 8 lines
Count of Matches in Tournament · 28 lines
Count of Range Sum · 45 lines
Count of Smaller Numbers After Self · 31 lines
Count Operations to Obtain Zero · 15 lines
Count Pairs Of Nodes · 58 lines
Count Pairs With XOR in a Range · 79 lines
Count Prefixes of a Given String · 23 lines
Count Primes · 15 lines
Count Servers that Communicate · 71 lines
Count Sorted Vowel Strings · 12 lines
Count Special Quadruplets · 21 lines
Count Square Submatrices with All Ones · 28 lines
Count Square Sum Triples · 13 lines
Count Subarrays With Score Less Than K · 19 lines
Count Sub Islands · 42 lines
Count Submatrices With All Ones · 37 lines
Count Substrings That Differ by One Character · 33 lines
Count Subtrees With Max Distance Between Cities · 73 lines
Count the Hidden Sequences · 31 lines
Count the Number of Consistent Strings · 22 lines
Count the Number of Ideal Arrays · 43 lines
Count Triplets That Can Form Two Arrays of Equal XOR · 15 lines
Count Unguarded Cells in the Grid · 28 lines
Count Unhappy Friends · 34 lines
Count Unreachable Pairs of Nodes in an Undirected Graph · 38 lines
Count Vowels Permutation · 63 lines
Count Vowel Substrings of a String · 18 lines
Count Ways to Build Rooms in an Ant Colony · 37 lines
Count Ways to Make Array With Product · 68 lines
Count Words Obtained After Adding a Letter · 35 lines
Couples Holding Hands · 23 lines
Course Schedule · 48 lines
Course Schedule II · 41 lines
Course Schedule III · 18 lines
Course Schedule IV · 27 lines
Cousins in Binary Tree · 63 lines
Cracking the Safe · 40 lines
Crawler Log Folder · 15 lines
Create Binary Tree From Descriptions · 29 lines
Create Maximum Number · 40 lines
Create Sorted Array through Instructions · 80 lines
Critical Connections in a Network · 45 lines
Custom Sort String · 28 lines
Cut Off Trees for Golf Event · 61 lines
Cyclically Rotating a Grid · 59 lines
Daily Temperatures · 21 lines
Data Stream as Disjoint Intervals · 80 lines
Day of the Week · 21 lines
Day of the Year · 20 lines
Decoded String at Index · 17 lines
Decode String · 48 lines
Decode the Message · 29 lines
Decode the Slanted Ciphertext · 24 lines
Decode Ways · 20 lines
Decode Ways II · 29 lines
Decode XORed Array · 10 lines
Decode XORed Permutation · 28 lines
Decompress Run-Length Encoded List · 13 lines
Decrease Elements To Make Array Zigzag · 37 lines
Decrypt String from Alphabet to Integer Mapping · 24 lines
Deepest Leaves Sum · 32 lines
Defanging an IP Address · 5 lines
Defuse the Bomb · 21 lines
Degree of an Array · 48 lines
Delete and Earn · 24 lines
Delete Characters to Make Fancy String · 17 lines
Delete Columns to Make Sorted · 18 lines
Delete Columns to Make Sorted II · 25 lines
Delete Leaves With a Given Value · 9 lines
Delete Node in a BST · 28 lines
Delete Node in a Linked List · 18 lines
Delete Nodes And Return Forest · 81 lines
Delete Operation for Two Strings · 29 lines
Delete the Middle Node of a Linked List · 18 lines
Delivering Boxes from Storage to Ports · 29 lines
Describe the Painting · 91 lines
Design Add and Search Words Data Structure · 45 lines
Design a Food Rating System · 56 lines
Design an ATM Machine · 44 lines
Design a Number Container System · 24 lines
Design a Stack With Increment Operation · 42 lines
Design a Text Editor · 35 lines
Design Authentication Manager · 28 lines
Design Bitset · 48 lines
Design Browser History · 39 lines
Design Circular Deque · 86 lines
Design Circular Queue · 65 lines
Design Front Middle Back Queue · 42 lines
Design HashMap · 68 lines
Design HashSet · 47 lines
Design Linked List · 95 lines
Design Movie Rental System · 127 lines
Design Parking System · 17 lines
Design Skiplist · 278 lines
Design Underground System · 73 lines
Destination City · 13 lines
Destroying Asteroids · 25 lines
Detect Capital · 12 lines
Detect Cycles in 2D Grid · 46 lines
Detect Pattern of Length M Repeated K or More Times · 18 lines
Detect Squares · 26 lines
Determine Color of a Chessboard Square · 5 lines
Determine if String Halves Are Alike · 25 lines
Determine if Two Strings Are Close · 28 lines
Determine Whether Matrix Can Be Obtained By Rotation · 37 lines
Detonate the Maximum Bombs · 42 lines
Diagonal Traverse · 63 lines
Diagonal Traverse II · 37 lines
Diameter of Binary Tree · 39 lines
Dice Roll Simulation · 28 lines
Different Ways to Add Parentheses · 36 lines
Dinner Plate Stacks · 52 lines
Display Table of Food Orders in a Restaurant · 39 lines
Distance Between Bus Stops · 19 lines
Distant Barcodes · 47 lines
Distinct Echo Substrings · 30 lines
Distinct Subsequences · 39 lines
Distinct Subsequences II · 28 lines
Distribute Candies · 7 lines
Distribute Candies to People · 21 lines
Distribute Coins in Binary Tree · 16 lines
Distribute Repeating Integers · 39 lines
DI String Match · 16 lines
Divide Array in Sets of K Consecutive Numbers · 25 lines
Divide Array Into Equal Pairs · 11 lines
Divide a String Into Groups of Size k · 26 lines
Divide Two Integers · 22 lines
Divisor Game · 5 lines
Domino and Tromino Tiling · 12 lines
Dota2 Senate · 32 lines
Dungeon Game · 20 lines
Duplicate Zeros · 22 lines
Earliest Possible Day of Full Bloom · 23 lines
Edit Distance · 33 lines
Egg Drop With 2 Eggs and N Floors · 23 lines
Element Appearing More Than 25% In Sorted Array · 19 lines
Eliminate Maximum Number of Monsters · 29 lines
Elimination Game · 18 lines
Employee Importance · 31 lines
Encode and Decode TinyURL · 12 lines
Encrypt and Decrypt Strings · 36 lines
Equal Rational Numbers · 21 lines
Equal Row and Column Pairs · 23 lines
Equal Sum Arrays With Minimum Number of Operations · 33 lines
Erect the Fence · 73 lines
Escape a Large Maze · 81 lines
Escape The Ghosts · 14 lines
Escape the Spreading Fire · 105 lines
Evaluate Boolean Binary Tree · 8 lines
Evaluate Division · 75 lines
Evaluate Reverse Polish Notation · 18 lines
Evaluate the Bracket Pairs of a String · 24 lines
Even Odd Tree · 37 lines
Exam Room · 64 lines
Excel Sheet Column Number · 14 lines
Excel Sheet Column Title · 11 lines
Exclusive Time of Functions · 51 lines
Execution of All Suffix Instructions Staying in a Grid · 37 lines
Expression Add Operators · 47 lines
Expressive Words · 73 lines
Factorial Trailing Zeroes · 10 lines
Fair Distribution of Cookies · 29 lines
Falling Squares · 57 lines
Fancy Sequence · 55 lines
Fibonacci Number · 11 lines
Filling Bookcase Shelves · 31 lines
Filter Restaurants by Vegan-Friendly, Price and Distance · 40 lines
Final Prices With a Special Discount in a Shop · 13 lines
Final Value of Variable After Performing Operations · 10 lines
Find a Corresponding Node of a Binary Tree in a Clone of That Tree · 19 lines
Find All Anagrams in a String · 43 lines
Find All Duplicates in an Array · 14 lines
Find All Good Strings · 70 lines
Find All Groups of Farmland · 27 lines
Find All Lonely Numbers in the Array · 23 lines
Find All Numbers Disappeared in an Array · 24 lines
Find All People With Secret · 80 lines
Find All Possible Recipes from Given Supplies · 60 lines
Find And Replace in String · 32 lines
Find and Replace Pattern · 23 lines
Find Array Given Subset Sums · 27 lines
Find a Value of a Mysterious Function Closest to Target · 35 lines
Find Bottom Left Tree Value · 19 lines
Find Closest Number to Zero · 7 lines
Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree · 129 lines
Find Duplicate Subtrees · 75 lines
Find Elements in a Contaminated Binary Tree · 37 lines
Find Eventual Safe States · 38 lines
Find First and Last Position of Element in Sorted Array · 14 lines
Find First Palindromic String in the Array · 11 lines
Find Good Days to Rob the Bank · 30 lines
Find Greatest Common Divisor of Array · 14 lines
Finding 3-Digit Even Numbers · 53 lines
Finding MK Average · 96 lines
Finding Pairs With a Certain Sum · 35 lines
Finding the Users Active Minutes · 28 lines
Find in Mountain Array · 50 lines
Find K Closest Elements · 16 lines
Find K Pairs with Smallest Sums · 19 lines
Find Kth Bit in Nth Binary String · 30 lines
Find Kth Largest XOR Coordinate Value · 55 lines
Find K-th Smallest Pair Distance · 25 lines
Find Largest Value in Each Tree Row · 29 lines
Find Latest Group of Size M · 69 lines
Find Longest Awesome Substring · 26 lines
Find Lucky Integer in an Array · 21 lines
Find Median from Data Stream · 43 lines
Find Minimum in Rotated Sorted Array · 12 lines
Find Minimum in Rotated Sorted Array II · 17 lines
Find Minimum Time to Finish All Jobs · 28 lines
Find Missing Observations · 23 lines
Find Mode in Binary Search Tree · 61 lines
Find Nearest Point That Has the Same X or Y Coordinate · 18 lines
Find Numbers with Even Number of Digits · 9 lines
Find N Unique Integers Sum up to Zero · 18 lines
Find Original Array From Doubled Array · 32 lines
Find Palindrome With Fixed Length · 25 lines
Find Peak Element · 18 lines
Find Pivot Index · 19 lines
Find Players With Zero or One Losses · 38 lines
Find Positive Integer Solution for a Given Equation · 38 lines
Find Resultant Array After Removing Anagrams · 16 lines
Find Right Interval · 43 lines
Find Servers That Handled Most Number of Requests · 65 lines
Find Smallest Letter Greater Than Target · 19 lines
Find Subsequence of Length K With the Largest Sum · 21 lines
Find Substring With Given Hash Value · 64 lines
Find Target Indices After Sorting Array · 25 lines
Find the City With the Smallest Number of Neighbors at a Threshold Distance · 40 lines
Find the Closest Palindrome · 42 lines
Find the Difference · 8 lines
Find the Difference of Two Arrays · 29 lines
Find the Distance Value Between Two Arrays · 15 lines
Find the Duplicate Number · 25 lines
Find the Highest Altitude · 13 lines
Find the K-Beauty of a Number · 20 lines
Find the Kth Largest Integer in the Array · 30 lines
Find the Kth Smallest Sum of a Matrix With Sorted Rows · 32 lines
Find the Longest Substring Containing Vowels in Even Counts · 52 lines
Find the Longest Valid Obstacle Course at Each Position · 34 lines
Find the Middle Index in Array · 18 lines
Find the Minimum and Maximum Number of Nodes Between Critical Points · 27 lines
Find the Minimum Number of Fibonacci Numbers Whose Sum Is K · 21 lines
Find the Most Competitive Subsequence · 14 lines
Find the Shortest Superstring · 42 lines
Find the Smallest Divisor Given a Threshold · 19 lines
Find the Student that Will Replace the Chalk · 18 lines
Find the Town Judge · 28 lines
Find the Winner of an Array Game · 16 lines
Find the Winner of the Circular Game · 20 lines
Find Triangular Sum of an Array · 14 lines
Find Two Non-overlapping Sub-arrays Each With Target Sum · 34 lines
Find Unique Binary String · 8 lines
Find Winner on a Tic Tac Toe Game · 39 lines
Find Words That Can Be Formed by Characters · 30 lines
Find XOR Sum of All Pairs Bitwise AND · 16 lines
First Bad Version · 20 lines
First Day Where You Have Been in All the Rooms · 12 lines
First Letter to Appear Twice · 15 lines
First Missing Positive · 29 lines
First Unique Character in a String · 16 lines
Fizz Buzz · 20 lines
Flatten a Multilevel Doubly Linked List · 32 lines
Flatten Binary Tree to Linked List · 15 lines
Flatten Nested List Iterator · 26 lines
Flip Binary Tree To Match Preorder Traversal · 22 lines
Flip Equivalent Binary Trees · 20 lines
Flipping an Image · 25 lines
Flip String to Monotone Increasing · 12 lines
Flood Fill · 22 lines
Flower Planting With No Adjacent · 32 lines
Form Array by Concatenating Subarrays of Another Array · 29 lines
Form Largest Integer With Digits That Add up to Target · 48 lines
Four Divisors · 23 lines
Fraction Addition and Subtraction · 37 lines
Fraction to Recurring Decimal · 35 lines
Freedom Trail · 38 lines
Frequency of the Most Frequent Element · 24 lines
Friends Of Appropriate Ages · 24 lines
Frog Jump · 48 lines
Frog Position After T Seconds · 43 lines
Fruit Into Baskets · 30 lines
Game of Life · 42 lines
Gas Station · 30 lines
GCD Sort of an Array · 47 lines
Generate a String With Characters That Have Odd Counts · 9 lines
Generate Parentheses · 24 lines
Generate Random Point in a Circle · 22 lines
Get Biggest Three Rhombus Sums in a Grid · 89 lines
Get Equal Substrings Within Budget · 17 lines
Get Maximum in Generated Array · 21 lines
Get the Maximum Score · 28 lines
Get Watched Videos by Your Friends · 50 lines
Global and Local Inversions · 10 lines
Goal Parser Interpretation · 18 lines
Goat Latin · 31 lines
Graph Connectivity With Threshold · 63 lines
Gray Code · 9 lines
Greatest Common Divisor of Strings · 44 lines
Greatest English Letter in Upper and Lower Case · 10 lines
Greatest Sum Divisible by Three · 44 lines
Grid Game · 25 lines
Grid Illumination · 157 lines
Group Anagrams · 29 lines
Groups of Special-Equivalent Strings · 67 lines
Groups of Strings · 66 lines
Group the People Given the Group Size They Belong To · 35 lines
Grumpy Bookstore Owner · 27 lines
Guess Number Higher or Lower · 22 lines
Guess Number Higher or Lower II · 20 lines
Hamming Distance · 12 lines
Hand of Straights · 29 lines
Happy Number · 29 lines
Heaters · 31 lines
Height Checker · 18 lines
H-Index · 13 lines
H-Index II · 12 lines
House Robber · 26 lines
House Robber II · 38 lines
House Robber III · 22 lines
How Many Numbers Are Smaller Than the Current Number · 40 lines
HTML Entity Parser · 10 lines
Image Smoother · 55 lines
Implement Magic Dictionary · 34 lines
Implement Queue using Stacks · 44 lines
Implement Stack using Queues · 32 lines
Implement strStr() · 31 lines
Implement Trie (Prefix Tree) · 44 lines
Increasing Decreasing String · 28 lines
Increasing Order Search Tree · 17 lines
Increasing Subsequences · 30 lines
Increasing Triplet Subsequence · 17 lines
Incremental Memory Leak · 11 lines
Insert Delete GetRandom O(1) · 40 lines
Insert Delete GetRandom O(1) - Duplicates allowed · 48 lines
Insert Interval · 26 lines
Insert into a Binary Search Tree · 10 lines
Insertion Sort List · 16 lines
Insufficient Nodes in Root to Leaf Paths · 16 lines
Integer Break · 24 lines
Integer Replacement · 20 lines
Integer to English Words · 90 lines
Integer to Roman · 16 lines
Intersection of Multiple Arrays · 22 lines
Intersection of Two Arrays · 20 lines
Intersection of Two Arrays II · 18 lines
Intersection of Two Linked Lists · 30 lines
Interval List Intersections · 21 lines
Intervals Between Identical Elements · 33 lines
Invalid Transactions · 47 lines
Invert Binary Tree · 20 lines
IPO · 28 lines
Is Graph Bipartite? · 33 lines
Island Perimeter · 26 lines
Isomorphic Strings · 17 lines
Is Subsequence · 12 lines
Iterator for Combination · 32 lines
Jewels and Stones · 13 lines
Jump Game · 15 lines
Jump Game II · 26 lines
Jump Game III · 20 lines
Jump Game IV · 69 lines
Jump Game V · 42 lines
Jump Game VI · 14 lines
Jump Game VII · 30 lines
K Closest Points to Origin · 35 lines
K-Concatenation Maximum Sum · 33 lines
K-diff Pairs in an Array · 13 lines
K Divisible Elements Subarrays · 24 lines
Keep Multiplying Found Values by Two · 10 lines
Keyboard Row · 20 lines
Keys and Rooms · 26 lines
K Highest Ranked Items Within a Price Range · 128 lines
Kids With the Greatest Number of Candies · 26 lines
K Inverse Pairs Array · 20 lines
Knight Dialer · 28 lines
Knight Probability in Chessboard · 42 lines
Koko Eating Bananas · 27 lines
K Radius Subarray Averages · 21 lines
K-Similar Strings · 67 lines
Kth Ancestor of a Tree Node · 46 lines
Kth Distinct String in an Array · 19 lines
Kth Largest Element in a Stream · 18 lines
Kth Missing Positive Number · 16 lines
Kth Smallest Element in a BST · 25 lines
Kth Smallest Element in a Sorted Matrix · 48 lines
Kth Smallest Number in Multiplication Table · 26 lines
Kth Smallest Product of Two Sorted Arrays · 40 lines
K-th Symbol in Grammar · 23 lines
Largest 1-Bordered Square · 38 lines
Largest 3-Same-Digit Number in String · 10 lines
Largest Color Value in a Directed Graph · 74 lines
Largest Combination With Bitwise AND Greater Than Zero · 18 lines
Largest Component Size by Common Factor · 115 lines
Largest Divisible Subset · 33 lines
Largest Magic Square · 77 lines
Largest Merge Of Two Strings · 60 lines
Largest Multiple of Three · 107 lines
Largest Number · 15 lines
Largest Number After Digit Swaps by Parity · 25 lines
Largest Number After Mutating Substring · 39 lines
Largest Number At Least Twice of Others · 28 lines
Largest Odd Number in String · 8 lines
Largest Palindrome Product · 26 lines
Largest Perimeter Triangle · 10 lines
Largest Plus Sign · 59 lines
Largest Rectangle in Histogram · 33 lines
Largest Submatrix With Rearrangements · 21 lines
Largest Substring Between Two Equal Characters · 22 lines
Largest Sum of Averages · 29 lines
Largest Time for Given Digits · 41 lines
Largest Triangle Area · 21 lines
Largest Values From Labels · 32 lines
Last Day Where You Can Still Cross · 45 lines
Last Moment Before All Ants Fall Out of a Plank · 12 lines
Last Stone Weight · 14 lines
Last Substring in Lexicographical Order · 23 lines
Latest Time by Replacing Hidden Digits · 19 lines
Leaf-Similar Trees · 25 lines
Least Number of Unique Integers after K Removals · 16 lines
Lemonade Change · 29 lines
Length of Last Word · 12 lines
Length of Longest Fibonacci Subsequence · 34 lines
Letter Combinations of a Phone Number · 27 lines
Letter Tile Possibilities · 25 lines
Lexicographically Smallest String After Applying Operations · 43 lines
Lexicographical Numbers · 53 lines
LFU Cache · 160 lines
License Key Formatting · 18 lines
Linked List Components · 20 lines
Linked List Cycle · 16 lines
Linked List Cycle II · 19 lines
Linked List in Binary Tree · 14 lines
Linked List Random Node · 19 lines
Longer Contiguous Segments of Ones than Zeros · 23 lines
Longest Absolute File Path · 32 lines
Longest Arithmetic Subsequence · 19 lines
Longest Arithmetic Subsequence of Given Difference · 20 lines
Longest Binary Subsequence Less Than or Equal to K · 24 lines
Longest Chunked Palindrome Decomposition · 10 lines
Longest Common Prefix · 47 lines
Longest Common Subpath · 144 lines
Longest Common Subsequence · 19 lines
Longest Consecutive Sequence · 45 lines
Longest Continuous Increasing Subsequence · 16 lines
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit · 53 lines
Longest Cycle in a Graph · 22 lines
Longest Duplicate Substring · 36 lines
Longest Happy Prefix · 37 lines
Longest Happy String · 48 lines
Longest Harmonious Subsequence · 50 lines
Longest Ideal Subsequence · 17 lines
Longest Increasing Path in a Matrix · 36 lines
Longest Increasing Subsequence · 35 lines
Longest Mountain in Array · 30 lines
Longest Nice Substring · 36 lines
Longest Palindrome · 29 lines
Longest Palindrome by Concatenating Two Letter Words · 21 lines
Longest Palindromic Subsequence · 24 lines
Longest Palindromic Substring · 23 lines
Longest Path With Different Adjacent Characters · 38 lines
Longest Repeating Character Replacement · 18 lines
Longest String Chain · 40 lines
Longest Subarray of 1's After Deleting One Element · 30 lines
Longest Subsequence Repeated k Times · 37 lines
Longest Substring Of All Vowels in Order · 18 lines
Longest Substring of One Repeating Character · 96 lines
Longest Substring with At Least K Repeating Characters · 42 lines
Longest Substring Without Repeating Characters · 20 lines
Longest Turbulent Subarray · 46 lines
Longest Uncommon Subsequence I · 6 lines
Longest Uncommon Subsequence II · 25 lines
Longest Univalue Path · 31 lines
Longest Valid Parentheses · 22 lines
Longest Well-Performing Interval · 57 lines
Longest Word in Dictionary · 35 lines
Longest Word in Dictionary through Deleting · 56 lines
Longest ZigZag Path in a Binary Tree · 30 lines
Long Pressed Name · 21 lines
Loud and Rich · 28 lines
Lowest Common Ancestor of a Binary Search Tree · 18 lines
Lowest Common Ancestor of a Binary Tree · 29 lines
Lowest Common Ancestor of Deepest Leaves · 44 lines
LRU Cache · 73 lines
Lucky Numbers in a Matrix · 31 lines
Magical String · 33 lines
Magic Squares In Grid · 40 lines
Magnetic Force Between Two Balls · 37 lines
Majority Element · 13 lines
Majority Element II · 32 lines
Make Array Strictly Increasing · 20 lines
Make Array Zero by Subtracting Equal Amounts · 19 lines
Make The String Great · 15 lines
Make the XOR of All Segments Equal to Zero · 44 lines
Make Two Arrays Equal by Reversing Sub-arrays · 18 lines
Making A Large Island · 74 lines
Making File Names Unique · 48 lines
Map of Highest Peak · 76 lines
Map Sum Pairs · 37 lines
Masking Personal Information · 50 lines
Matchsticks to Square · 28 lines
Match Substring After Replacement · 33 lines
Matrix Block Sum · 25 lines
Matrix Cells in Distance Order · 74 lines
Matrix Diagonal Sum · 16 lines
Max Area of Island · 70 lines
Max Chunks To Make Sorted · 11 lines
Max Chunks To Make Sorted II · 47 lines
Max Consecutive Ones · 18 lines
Max Consecutive Ones III · 21 lines
Max Difference You Can Get From Changing an Integer · 44 lines
Max Dot Product of Two Subsequences · 21 lines
Maximal Network Rank · 37 lines
Maximal Rectangle · 54 lines
Maximal Square · 31 lines
Maximize Distance to Closest Person · 25 lines
Maximize Grid Happiness · 115 lines
Maximize Number of Subsequences in a String · 45 lines
Maximize Palindrome Length From Subsequences · 26 lines
Maximize Score After N Operations · 34 lines
Maximize Sum Of Array After K Negations · 20 lines
Maximize the Confusion of an Exam · 60 lines
Maximize the Topmost Element After K Moves · 18 lines
Maximum 69 Number · 21 lines
Maximum Absolute Sum of Any Subarray · 18 lines
Maximum Alternating Subsequence Sum · 12 lines
Maximum AND Sum of Array · 42 lines
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts · 20 lines
Maximum Ascending Subarray Sum · 11 lines
Maximum Average Pass Ratio · 29 lines
Maximum Binary String After Change · 23 lines
Maximum Binary Tree · 29 lines
Maximum Binary Tree II · 12 lines
Maximum Building Height · 42 lines
Maximum Candies Allocated to K Children · 29 lines
Maximum Candies You Can Get from Boxes · 51 lines
Maximum Compatibility Score Sum · 29 lines
Maximum Consecutive Floors Without Special Floors · 20 lines
Maximum Depth of Binary Tree · 11 lines
Maximum Depth of N-ary Tree · 17 lines
Maximum Difference Between Increasing Elements · 12 lines
Maximum Difference Between Node and Ancestor · 22 lines
Maximum Distance Between a Pair of Values · 25 lines
Maximum Earnings From Taxi · 48 lines
Maximum Element After Decreasing and Rearranging · 10 lines
Maximum Employees to Be Invited to a Meeting · 68 lines
Maximum Equal Frequency · 49 lines
Maximum Erasure Value · 16 lines
Maximum Frequency Stack · 47 lines
Maximum Fruits Harvested After at Most K Steps · 69 lines
Maximum Gap · 13 lines
Maximum Good People Based on Statements · 80 lines
Maximum Height by Stacking Cuboids · 40 lines
Maximum Ice Cream Bars · 21 lines
Maximum Length of a Concatenated String with Unique Characters · 23 lines
Maximum Length of Repeated Subarray · 17 lines
Maximum Length of Subarray With Positive Product · 28 lines
Maximum Level Sum of a Binary Tree · 27 lines
Maximum Matrix Sum · 18 lines
Maximum Nesting Depth of the Parentheses · 16 lines
Maximum Nesting Depth of Two Valid Parentheses Strings · 9 lines
Maximum Non Negative Product in a Matrix · 37 lines
Maximum Number of Achievable Transfer Requests · 30 lines
Maximum Number of Balloons · 27 lines
Maximum Number of Balls in a Box · 17 lines
Maximum Number of Coins You Can Get · 8 lines
Maximum Number of Consecutive Values You Can Make · 14 lines
Maximum Number of Eaten Apples · 38 lines
Maximum Number of Events That Can Be Attended · 24 lines
Maximum Number of Events That Can Be Attended II · 28 lines
Maximum Number of Groups Entering a Competition · 7 lines
Maximum Number of Non-Overlapping Subarrays With Sum Equals Target · 19 lines
Maximum Number of Non-Overlapping Substrings · 51 lines
Maximum Number of Occurrences of a Substring · 25 lines
Maximum Number of Pairs in Array · 20 lines
Maximum Number of Points with Cost · 51 lines
Maximum Number of Removable Characters · 33 lines
Maximum Number of Tasks You Can Assign · 61 lines
Maximum Number of Visible Points · 39 lines
Maximum Number of Vowels in a Substring of Given Length · 29 lines
Maximum Number of Ways to Partition an Array · 41 lines
Maximum Number of Weeks for Which You Can Work · 12 lines
Maximum Number of Words Found in Sentences · 9 lines
Maximum Number of Words You Can Type · 18 lines
Maximum of Absolute Value Expression · 40 lines
Maximum Path Quality of a Graph · 32 lines
Maximum Performance of a Team · 29 lines
Maximum Points in an Archery Competition · 30 lines
Maximum Points You Can Obtain from Cards · 27 lines
Maximum Population Year · 29 lines
Maximum Product After K Increments · 19 lines
Maximum Product Difference Between Two Pairs · 22 lines
Maximum Product of Splitted Binary Tree · 35 lines
Maximum Product of the Length of Two Palindromic Subsequences · 29 lines
Maximum Product of the Length of Two Palindromic Substrings · 79 lines
Maximum Product of Three Numbers · 25 lines
Maximum Product of Two Elements in an Array · 18 lines
Maximum Product of Word Lengths · 16 lines
Maximum Product Subarray · 18 lines
Maximum Profit of Operating a Centennial Wheel · 50 lines
Maximum Repeating Substring · 13 lines
Maximum Running Time of N Computers · 46 lines
Maximum Score After Splitting a String · 13 lines
Maximum Score from Performing Multiplication Operations · 19 lines
Maximum Score From Removing Stones · 13 lines
Maximum Score From Removing Substrings · 37 lines
Maximum Score of a Good Subarray · 35 lines
Maximum Score of a Node Sequence · 119 lines
Maximum Score Of Spliced Array · 29 lines
Maximum Score Words Formed by Letters · 45 lines
Maximum Side Length of a Square with Sum Less than or Equal to Threshold · 31 lines
Maximum Split of Positive Even Integers · 25 lines
Maximum Students Taking Exam · 42 lines
Maximum Subarray · 13 lines
Maximum Subarray Min-Product · 49 lines
Maximum Subarray Sum with One Deletion · 30 lines
Maximum Sum BST in Binary Tree · 25 lines
Maximum Sum Circular Subarray · 28 lines
Maximum Sum Obtained of Any Permutation · 21 lines
Maximum Sum of 3 Non-Overlapping Subarrays · 33 lines
Maximum Sum of Two Non-Overlapping Subarrays · 71 lines
Maximum Swap · 24 lines
Maximum Total Beauty of the Gardens · 23 lines
Maximum Total Importance of Roads · 13 lines
Maximum Trailing Zeros in a Cornered Path · 111 lines
Maximum Twin Sum of a Linked List · 45 lines
Maximum Units on a Truck · 13 lines
Maximum Value after Insertion · 42 lines
Maximum Value at a Given Index in a Bounded Array · 107 lines
Maximum Value of K Coins From Piles · 23 lines
Maximum White Tiles Covered by a Carpet · 32 lines
Maximum Width Ramp · 23 lines
Maximum XOR After Operations · 9 lines
Maximum XOR of Two Numbers in an Array · 68 lines
Maximum XOR With an Element From Array · 90 lines
Max Increase to Keep City Skyline · 20 lines
Max Number of K-Sum Pairs · 19 lines
Max Points on a Line · 28 lines
Max Sum of a Pair With Equal Sum of Digits · 28 lines
Max Sum of Rectangle No Larger Than K · 53 lines
Max Value of Equation · 19 lines
Mean of Array After Removing Some Elements · 15 lines
Median of Two Sorted Arrays · 53 lines
Merge BSTs to Create Single BST · 63 lines
Merge In Between Linked Lists · 15 lines
Merge Intervals · 30 lines
Merge k Sorted Lists · 30 lines
Merge Nodes in Between Zeros · 29 lines
Merge Sorted Array · 27 lines
Merge Strings Alternately · 11 lines
Merge Triplets to Form Target Triplet · 30 lines
Merge Two Sorted Lists · 25 lines
Middle of the Linked List · 18 lines
Min Cost Climbing Stairs · 12 lines
Min Cost to Connect All Points · 44 lines
Minesweeper · 48 lines
Minimize Deviation in Array · 24 lines
Minimized Maximum of Products Distributed to Any Store · 39 lines
Minimize Hamming Distance After Swap Operations · 53 lines
Minimize Malware Spread · 80 lines
Minimize Malware Spread II · 96 lines
Minimize Maximum Pair Sum in Array · 14 lines
Minimize Result by Adding Parentheses to Expression · 34 lines
Minimize the Difference Between Target and Chosen Elements · 22 lines
Minimum Absolute Difference · 23 lines
Minimum Absolute Difference in BST · 16 lines
Minimum Absolute Difference Queries · 32 lines
Minimum Absolute Sum Difference · 108 lines
Minimum Add to Make Parentheses Valid · 18 lines
Minimum Adjacent Swaps for K Consecutive Ones · 33 lines
Minimum Adjacent Swaps to Reach the Kth Smallest Number · 66 lines
Minimum Amount of Time to Fill Cups · 17 lines
Minimum Area Rectangle · 36 lines
Minimum Area Rectangle II · 35 lines
Minimum Average Difference · 42 lines
Minimum Bit Flips to Convert Number · 11 lines
Minimum Changes To Make Alternating Binary String · 20 lines
Minimum Consecutive Cards to Pick Up · 15 lines
Minimum Cost For Tickets · 21 lines
Minimum Cost Homecoming of a Robot in a Grid · 43 lines
Minimum Cost of Buying Candies With Discount · 22 lines
Minimum Cost to Change the Final Value of Expression · 57 lines
Minimum Cost to Cut a Stick · 31 lines
Minimum Cost to Hire K Workers · 34 lines
Minimum Cost to Make at Least One Valid Path in a Grid · 70 lines
Minimum Cost to Merge Stones · 62 lines
Minimum Cost to Move Chips to The Same Position · 14 lines
Minimum Cost to Reach Destination in Time · 39 lines
Minimum Cost to Set Cooking Time · 25 lines
Minimum Cost Tree From Leaf Values · 63 lines
Minimum Degree of a Connected Trio in a Graph · 32 lines
Minimum Deletions to Make Array Beautiful · 13 lines
Minimum Deletions to Make Character Frequencies Unique · 23 lines
Minimum Deletions to Make String Balanced · 20 lines
Minimum Depth of Binary Tree · 16 lines
Minimum Difference Between Highest and Lowest of K Scores · 15 lines
Minimum Difference Between Largest and Smallest Value in Three Moves · 30 lines
Minimum Difference in Sums After Removal of Elements · 62 lines
Minimum Difficulty of a Job Schedule · 41 lines
Minimum Distance Between BST Nodes · 35 lines
Minimum Distance to the Target Element · 11 lines
Minimum Distance to Type a Word Using Two Fingers · 46 lines
Minimum Domino Rotations For Equal Row · 34 lines
Minimum Elements to Add to Form a Given Sum · 8 lines
Minimum Falling Path Sum · 31 lines
Minimum Falling Path Sum II · 74 lines
Minimum Flips to Make a OR b Equal to c · 29 lines
Minimum Garden Perimeter to Collect Enough Apples · 11 lines
Minimum Genetic Mutation · 36 lines
Minimum Height Trees · 43 lines
Minimum Incompatibility · 33 lines
Minimum Increment to Make Array Unique · 46 lines
Minimum Index Sum of Two Lists · 30 lines
Minimum Initial Energy to Finish Tasks · 21 lines
Minimum Insertion Steps to Make a String Palindrome · 31 lines
Minimum Insertions to Balance a Parentheses String · 30 lines
Minimum Interval to Include Each Query · 29 lines
Minimum Jumps to Reach Home · 48 lines
Minimum Length of String After Deleting Similar Ends · 23 lines
Minimum Limit of Balls in a Bag · 35 lines
Minimum Lines to Represent a Line Chart · 19 lines
Minimum Moves to Convert String · 15 lines
Minimum Moves to Equal Array Elements · 12 lines
Minimum Moves to Equal Array Elements II · 11 lines
Minimum Moves to Make Array Complementary · 21 lines
Minimum Moves to Move a Box to Their Target Location · 210 lines
Minimum Moves to Reach Target Score · 17 lines
Minimum Moves to Reach Target with Rotations · 102 lines
Minimum Non-Zero Product of the Array Elements · 27 lines
Minimum Number of Arrows to Burst Balloons · 58 lines
Minimum Number of Days to Eat N Oranges · 20 lines
Minimum Number of Days to Make m Bouquets · 33 lines
Minimum Number of Flips to Convert Binary Matrix to Zero Matrix · 54 lines
Minimum Number of Flips to Make the Binary String Alternating · 30 lines
Minimum Number of Frogs Croaking · 28 lines
Minimum Number of Increments on Subarrays to Form a Target Array · 20 lines
Minimum Number of K Consecutive Bit Flips · 21 lines
Minimum Number of Moves to Make Palindrome · 54 lines
Minimum Number of Moves to Seat Everyone · 11 lines
Minimum Number of Operations to Convert Time · 18 lines
Minimum Number of Operations to Make Array Continuous · 16 lines
Minimum Number of Operations to Make String Sorted · 45 lines
Minimum Number of Operations to Move All Balls to Each Box · 15 lines
Minimum Number of Operations to Reinitialize a Permutation · 15 lines
Minimum Number of Refueling Stops · 19 lines
Minimum Number of Removals to Make Mountain Array · 29 lines
Minimum Number of Steps to Make Two Strings Anagram · 19 lines
Minimum Number of Steps to Make Two Strings Anagram II · 10 lines
Minimum Number of Swaps to Make the Binary String Alternating · 29 lines
Minimum Number of Swaps to Make the String Balanced · 15 lines
Minimum Number of Taps to Open to Water a Garden · 18 lines
Minimum Number of Vertices to Reach All Nodes · 18 lines
Minimum Number of Work Sessions to Finish the Tasks · 35 lines
Minimum Numbers of Function Calls to Make Target Array · 24 lines
Minimum Obstacle Removal to Reach Corner · 42 lines
Minimum One Bit Operations to Make Integers Zero · 15 lines
Minimum Operations to Convert Number · 28 lines
Minimum Operations to Halve Array Sum · 19 lines
Minimum Operations to Make Array Equal · 9 lines
Minimum Operations to Make a Subsequence · 56 lines
Minimum Operations to Make a Uni-Value Grid · 30 lines
Minimum Operations to Make the Array Alternating · 18 lines
Minimum Operations to Make the Array Increasing · 23 lines
Minimum Operations to Make the Array K-Increasing · 32 lines
Minimum Path Cost in a Grid · 31 lines
Minimum Path Sum · 21 lines
Minimum Possible Integer After at Most K Adjacent Swaps On Digits · 81 lines
Minimum Remove to Make Valid Parentheses · 22 lines
Minimum Replacements to Sort the Array · 24 lines
Minimum Rounds to Complete All Tasks · 31 lines
Minimum Score After Removals on a Tree · 126 lines
Minimum Score Triangulation of Polygon · 57 lines
Minimum Sideway Jumps · 38 lines
Minimum Size Subarray Sum · 16 lines
Minimum Skips to Arrive at Meeting On Time · 27 lines
Minimum Space Wasted From Packaging · 29 lines
Minimum Speed to Arrive on Time · 22 lines
Minimum Subsequence in Non-Increasing Order · 19 lines
Minimum Suffix Flips · 20 lines
Minimum Sum of Four Digit Number After Splitting Digits · 15 lines
Minimum Sum of Squared Difference · 66 lines
Minimum Swaps to Arrange a Binary Grid · 23 lines
Minimum Swaps To Make Sequences Increasing · 23 lines
Minimum Swaps to Make Strings Equal · 21 lines
Minimum Time Difference · 19 lines
Minimum Time to Collect All Apples in a Tree · 49 lines
Minimum Time to Complete Trips · 24 lines
Minimum Time to Finish the Race · 44 lines
Minimum Time to Make Rope Colorful · 39 lines
Minimum Time to Remove All Cars Containing Illegal Goods · 27 lines
Minimum Time to Type Word Using Special Typewriter · 14 lines
Minimum Time Visiting All Points · 13 lines
Minimum Total Space Wasted With K Resizing Operations · 51 lines
Minimum Value to Get Positive Step by Step Sum · 13 lines
Minimum Weighted Subgraph With the Required Paths · 60 lines
Minimum White Tiles After Covering With Carpets · 38 lines
Minimum Window Substring · 47 lines
Minimum XOR Sum of Two Arrays · 36 lines
Min Max Game · 16 lines
Mirror Reflection · 10 lines
Missing Number · 46 lines
Monotone Increasing Digits · 28 lines
Monotonic Array · 14 lines
Most Beautiful Item for Each Query · 35 lines
Most Common Word · 15 lines
Most Frequent Number Following Key In an Array · 21 lines
Most Frequent Subtree Sum · 35 lines
Most Profit Assigning Work · 18 lines
Most Stones Removed with Same Row or Column · 75 lines
Most Visited Sector in a Circular Track · 14 lines
Move Zeroes · 15 lines
Moving Stones Until Consecutive · 30 lines
Moving Stones Until Consecutive II · 34 lines
Multiply Strings · 32 lines
My Calendar II · 24 lines
My Calendar III · 30 lines
Naming a Company · 23 lines
N-ary Tree Level Order Traversal · 19 lines
N-ary Tree Postorder Traversal · 14 lines
N-ary Tree Preorder Traversal · 19 lines
Nearest Exit from Entrance in Maze · 38 lines
Network Delay Time · 46 lines
New 21 Game · 18 lines
Next Greater Element I · 18 lines
Next Greater Element II · 17 lines
Next Greater Element III · 50 lines
Next Greater Node In Linked List · 31 lines
Next Greater Numerically Balanced Number · 30 lines
Next Permutation · 50 lines
Nim Game · 7 lines
Non-decreasing Array · 13 lines
Non-negative Integers without Consecutive Ones · 23 lines
Non-overlapping Intervals · 31 lines
N-Queens · 77 lines
N-Queens II · 31 lines
N-Repeated Element in Size 2N Array · 11 lines
Nth Digit · 44 lines
Nth Magical Number · 39 lines
N-th Tribonacci Number · 18 lines
Number Complement · 16 lines
Number of 1 Bits · 6 lines
Number of Arithmetic Triplets · 18 lines
Number of Atoms · 54 lines
Number of Boomerangs · 41 lines
Number of Burgers with No Waste of Ingredients · 19 lines
Number of Closed Islands · 37 lines
Number of Days Between Two Dates · 53 lines
Number of Dice Rolls With Target Sum · 25 lines
Number of Different Integers in a String · 12 lines
Number of Different Subsequences GCDs · 27 lines
Number of Digit One · 22 lines
Number of Distinct Roll Sequences · 38 lines
Number of Enclaves · 54 lines
Number of Equivalent Domino Pairs · 30 lines
Number of Excellent Pairs · 20 lines
Number of Flowers in Full Bloom · 29 lines
Number of Good Leaf Nodes Pairs · 37 lines
Number of Good Pairs · 14 lines
Number of Good Ways to Split a String · 20 lines
Number of Increasing Paths in a Grid · 27 lines
Number of Islands · 27 lines
Number of Laser Beams in a Bank · 14 lines
Number of Lines To Write String · 19 lines
Number of Longest Increasing Subsequence · 30 lines
Number of Matching Subsequences · 38 lines
Number of Nodes in the Sub-Tree With the Same Label · 34 lines
Number of Operations to Make Network Connected · 54 lines
Number of Orders in the Backlog · 120 lines
Number of Pairs of Interchangeable Rectangles · 22 lines
Number of Pairs of Strings With Concatenation Equal to Target · 21 lines
Number of Paths with Max Score · 35 lines
Number of People Aware of a Secret · 33 lines
Number of Provinces · 26 lines
Number of Recent Calls · 21 lines
Number Of Rectangles That Can Form The Largest Square · 19 lines
Number of Restricted Paths From First to Last Node · 66 lines
Number of Segments in a String · 17 lines
Number of Sets of K Non-Overlapping Line Segments · 22 lines
Number of Smooth Descent Periods of a Stock · 22 lines
Number of Squareful Arrays · 36 lines
Number of Steps to Reduce a Number in Binary Representation to One · 16 lines
Number of Steps to Reduce a Number to Zero · 14 lines
Number of Strings That Appear as Substrings in Word · 11 lines
Number of Students Doing Homework at a Given Time · 9 lines
Number of Students Unable to Eat Lunch · 27 lines
Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold · 15 lines
Number of Subarrays with Bounded Maximum · 21 lines
Number of Sub-arrays With Odd Sum · 25 lines
Number of Submatrices That Sum to Target · 35 lines
Number of Subsequences That Satisfy the Given Sum Condition · 22 lines
Number of Substrings Containing All Three Characters · 53 lines
Number of Substrings With Only 1s · 16 lines
Number of Times Binary String Is Prefix-Aligned · 10 lines
Number of Unique Good Subsequences · 26 lines
Number of Valid Words for Each Puzzle · 40 lines
Number of Valid Words in a Sentence · 15 lines
Number of Visible People in a Queue · 17 lines
Number of Ways to Arrive at Destination · 48 lines
Number of Ways to Divide a Long Corridor · 20 lines
Number of Ways to Paint N × 3 Grid · 61 lines
Number of Ways to Rearrange Sticks With K Sticks Visible · 13 lines
Number Of Ways To Reconstruct A Tree · 54 lines
Number of Ways to Reorder Array to Get Same BST · 35 lines
Number of Ways to Select Buildings · 26 lines
Number of Ways to Split Array · 17 lines
Number of Ways to Split a String · 35 lines
Number of Ways to Stay in the Same Place After Some Steps · 30 lines
Number of Ways to Wear Different Hats to Each Other · 25 lines
Number of Ways Where Square of Number Is Equal to Product of Two Numbers · 38 lines
Number of Wonderful Substrings · 34 lines
Numbers At Most N Given Digit Set · 57 lines
Numbers With Repeated Digits · 44 lines
Numbers With Same Consecutive Differences · 27 lines
Occurrences After Bigram · 14 lines
Odd Even Jump · 38 lines
Odd Even Linked List · 18 lines
Online Election · 47 lines
Online Majority Element In Subarray · 55 lines
Online Stock Span · 32 lines
Open the Lock · 62 lines
Operations on Tree · 63 lines
Optimal Division · 22 lines
Orderly Queue · 20 lines
Out of Boundary Paths · 23 lines
Pacific Atlantic Water Flow · 52 lines
Paint House III · 40 lines
Painting a Grid With Three Different Colors · 65 lines
Pairs of Songs With Total Durations Divisible by 60 · 14 lines
Palindrome Linked List · 48 lines
Palindrome Number · 13 lines
Palindrome Pairs · 50 lines
Palindrome Partitioning · 32 lines
Palindrome Partitioning II · 38 lines
Palindrome Partitioning III · 29 lines
Palindrome Partitioning IV · 25 lines
Pancake Sorting · 40 lines
Parallel Courses II · 26 lines
Parallel Courses III · 33 lines
Parse Lisp Expression · 105 lines
Parsing A Boolean Expression · 53 lines
Partition Array According to Given Pivot · 25 lines
Partition Array for Maximum Sum · 59 lines
Partition Array into Disjoint Intervals · 19 lines
Partition Array Into Three Parts With Equal Sum · 25 lines
Partition Array Into Two Arrays to Minimize Sum Difference · 50 lines
Partition Array Such That Maximum Difference Is K · 13 lines
Partition Equal Subset Sum · 44 lines
Partitioning Into Minimum Number Of Deci-Binary Numbers · 9 lines
Partition Labels · 30 lines
Partition List · 25 lines
Partition to K Equal Sum Subsets · 40 lines
Pascal's Triangle · 21 lines
Pascal's Triangle II · 17 lines
Patching Array · 19 lines
Path Crossing · 19 lines
Path In Zigzag Labelled Binary Tree · 23 lines
Path Sum · 10 lines
Path Sum II · 25 lines
Path Sum III · 37 lines
Path with Maximum Gold · 32 lines
Path with Maximum Probability · 41 lines
Path With Minimum Effort · 100 lines
Peak Index in a Mountain Array · 21 lines
Peeking Iterator · 29 lines
People Whose List of Favorite Companies Is Not a Subset of Another List · 26 lines
Percentage of Letter in String · 14 lines
Perfect Number · 17 lines
Perfect Rectangle · 53 lines
Perfect Squares · 16 lines
Permutation in String · 55 lines
Permutations · 27 lines
Permutation Sequence · 22 lines
Permutations II · 29 lines
Pizza With 3n Slices · 23 lines
Plates Between Candles · 41 lines
Plus One · 32 lines
Poor Pigs · 12 lines
Populating Next Right Pointers in Each Node II · 41 lines
Positions of Large Groups · 36 lines
Possible Bipartition · 41 lines
Powerful Integers · 13 lines
Power of Four · 5 lines
Power of Three · 15 lines
Power of Two · 11 lines
Pow(x, n) · 11 lines
Predict the Winner · 24 lines
Preimage Size of Factorial Zeroes Function · 21 lines
Previous Permutation With One Swap · 26 lines
Prime Arrangements · 45 lines
Prime Number of Set Bits in Binary Representation · 30 lines
Prime Palindrome · 39 lines
Print Binary Tree · 41 lines
Print Words Vertically · 66 lines
Prison Cells After N Days · 22 lines
Probability of a Two Boxes Having The Same Number of Distinct Balls · 42 lines
Process Restricted Friend Requests · 66 lines
Process Tasks Using Servers · 60 lines
Product of Array Except Self · 22 lines
Product of the Last K Numbers · 20 lines
Projection Area of 3D Shapes · 30 lines
Pseudo-Palindromic Paths in a Binary Tree · 16 lines
Push Dominoes · 39 lines
Pyramid Transition Matrix · 49 lines
Queens That Can Attack the King · 85 lines
Queries on a Permutation With Key · 24 lines
Queries on Number of Points Inside a Circle · 26 lines
Query Kth Smallest Trimmed Number · 35 lines
Queue Reconstruction by Height · 17 lines
Rabbits in Forest · 22 lines
Race Car · 46 lines
Random Flip Matrix · 42 lines
Random Pick Index · 19 lines
Random Pick with Weight · 30 lines
Random Point in Non-overlapping Rectangles · 37 lines
Range Addition II · 10 lines
Range Frequency Queries · 44 lines
Range Module · 62 lines
Range Sum of BST · 21 lines
Range Sum of Sorted Subarray Sums · 22 lines
Range Sum Query 2D - Immutable · 27 lines
Range Sum Query - Immutable · 19 lines
Range Sum Query - Mutable · 137 lines
Rank Teams by Votes · 41 lines
Rank Transform of a Matrix · 109 lines
Ransom Note · 32 lines
Reachable Nodes In Subdivided Graph · 41 lines
Reachable Nodes With Restrictions · 30 lines
Reach a Number · 17 lines
Reaching Points · 13 lines
Rearrange Array Elements by Sign · 22 lines
Rearrange Characters to Make Target String · 12 lines
Rearrange Spaces Between Words · 43 lines
Rearrange Words in a Sentence · 23 lines
Reconstruct Itinerary · 27 lines
Reconstruct Original Digits from English · 83 lines
Recover a Tree From Preorder Traversal · 31 lines
Recover the Original Array · 31 lines
Rectangle Area · 20 lines
Rectangle Area II · 47 lines
Rectangle Overlap · 19 lines
Redistribute Characters to Make All Strings Equal · 25 lines
Reduce Array Size to The Half · 27 lines
Reducing Dishes · 22 lines
Reduction Operations to Make the Array Elements Equal · 14 lines
Redundant Connection · 49 lines
Redundant Connection II · 76 lines
Reformat Date · 25 lines
Reformat Phone Number · 18 lines
Reformat The String · 44 lines
Regions Cut By Slashes · 81 lines
Regular Expression Matching · 24 lines
Relative Ranks · 16 lines
Relative Sort Array · 33 lines
Remove All Adjacent Duplicates In String · 20 lines
Remove All Adjacent Duplicates in String II · 20 lines
Remove All Occurrences of a Substring · 11 lines
Remove Boxes · 24 lines
Remove Colored Pieces if Both Neighbors are the Same Color · 13 lines
Remove Comments · 72 lines
Remove Covered Intervals · 17 lines
Remove Digit From Number to Maximize Result · 13 lines
Remove Duplicate Letters · 25 lines
Remove Duplicates from Sorted Array · 12 lines
Remove Duplicates from Sorted Array II · 19 lines
Remove Duplicates from Sorted List · 24 lines
Remove Duplicates from Sorted List II · 40 lines
Remove Element · 11 lines
Remove Invalid Parentheses · 46 lines
Remove K Digits · 27 lines
Remove Linked List Elements · 19 lines
Remove Max Number of Edges to Keep Graph Fully Traversable · 106 lines
Remove Nth Node From End of List · 35 lines
Remove One Element to Make the Array Strictly Increasing · 19 lines
Remove Outermost Parentheses · 24 lines
Remove Palindromic Subsequences · 11 lines
Remove Stones to Minimize the Total · 16 lines
Remove Sub-Folders from the Filesystem · 35 lines
Remove Zero Sum Consecutive Nodes from Linked List · 28 lines
Removing Minimum and Maximum From Array · 44 lines
Removing Minimum Number of Magic Beans · 13 lines
Reordered Power of 2 · 22 lines
Reorder List · 40 lines
Reorder Routes to Make All Paths Lead to the City Zero · 19 lines
Reorganize String · 55 lines
Repeated DNA Sequences · 32 lines
Repeated String Match · 16 lines
Repeated Substring Pattern · 19 lines
Replace All Digits with Characters · 19 lines
Replace All ?'s to Avoid Consecutive Repeating Characters · 32 lines
Replace Elements in an Array · 12 lines
Replace Elements with Greatest Element on Right Side · 11 lines
Replace Non-Coprime Numbers in Array · 50 lines
Replace the Substring for Balanced String · 21 lines
Replace Words · 81 lines
Reshape the Matrix · 24 lines
Restore IP Addresses · 28 lines
Restore The Array · 24 lines
Restore the Array From Adjacent Pairs · 34 lines
Reveal Cards In Increasing Order · 48 lines
Reverse Bits · 24 lines
Reverse Integer · 12 lines
Reverse Linked List · 27 lines
Reverse Linked List II · 32 lines
Reverse Nodes in Even Length Groups · 94 lines
Reverse Nodes in k-Group · 41 lines
Reverse Only Letters · 48 lines
Reverse Pairs · 67 lines
Reverse Prefix of Word · 20 lines
Reverse String · 13 lines
Reverse String II · 34 lines
Reverse Subarray To Maximize Array Value · 34 lines
Reverse Substrings Between Each Pair of Parentheses · 44 lines
Reverse Vowels of a String · 32 lines
Reverse Words in a String · 19 lines
Reverse Words in a String III · 16 lines
Richest Customer Wealth · 13 lines
Rings and Rods · 23 lines
RLE Iterator · 43 lines
Robot Bounded In Circle · 87 lines
Robot Return to Origin · 14 lines
Roman to Integer · 39 lines
Root Equals Sum of Children · 5 lines
Rotate Array · 17 lines
Rotated Digits · 24 lines
Rotate Function · 15 lines
Rotate Image · 22 lines
Rotate List · 31 lines
Rotate String · 20 lines
Rotating the Box · 28 lines
Rotting Oranges · 47 lines
Russian Doll Envelopes · 52 lines
Same Tree · 14 lines
Satisfiability of Equality Equations · 51 lines
Score After Flipping Matrix · 45 lines
Score of Parentheses · 16 lines
Search a 2D Matrix · 21 lines
Search a 2D Matrix II · 33 lines
Search in a Binary Search Tree · 10 lines
Search in Rotated Sorted Array · 45 lines
Search in Rotated Sorted Array II · 36 lines
Search Insert Position · 15 lines
Search Suggestions System · 31 lines
Seat Reservation Manager · 19 lines
Second Largest Digit in a String · 19 lines
Second Minimum Node In a Binary Tree · 27 lines
Second Minimum Time to Reach Destination · 31 lines
Self Crossing · 22 lines
Self Dividing Numbers · 20 lines
Sell Diminishing-Valued Colored Balls · 45 lines
Selling Pieces of Wood · 22 lines
Sender With Largest Word Count · 34 lines
Sequential Digits · 31 lines
Sequentially Ordinal Rank Tracker · 43 lines
Serialize and Deserialize Binary Tree · 63 lines
Serialize and Deserialize BST · 40 lines
Set Intersection Size At Least Two · 51 lines
Set Matrix Zeroes · 62 lines
Set Mismatch · 14 lines
Shift 2D Grid · 34 lines
Shifting Letters · 22 lines
Shopping Offers · 48 lines
Short Encoding of Words · 79 lines
Shortest Bridge · 64 lines
Shortest Common Supersequence · 40 lines
Shortest Completing Word · 53 lines
Shortest Distance to a Character · 23 lines
Shortest Impossible Sequence of Rolls · 14 lines
Shortest Palindrome · 22 lines
Shortest Path in a Grid with Obstacles Elimination · 81 lines
Shortest Path in Binary Matrix · 53 lines
Shortest Path to Get All Keys · 112 lines
Shortest Path Visiting All Nodes · 49 lines
Shortest Path with Alternating Colors · 59 lines
Shortest Subarray to be Removed to Make Array Sorted · 23 lines
Shortest Subarray with Sum at Least K · 21 lines
Shortest Unsorted Continuous Subarray · 22 lines
Shuffle an Array · 31 lines
Shuffle String · 9 lines
Shuffle the Array · 17 lines
Sign of the Product of an Array · 16 lines
Similar String Groups · 35 lines
Simple Bank System · 33 lines
Simplified Fractions · 24 lines
Simplify Path · 17 lines
Single Element in a Sorted Array · 20 lines
Single Number · 11 lines
Single Number II · 22 lines
Single Number III · 22 lines
Sliding Puzzle · 64 lines
Sliding Window Maximum · 25 lines
Sliding Window Median · 42 lines
Slowest Key · 15 lines
Smallest Index With Equal Value · 14 lines
Smallest Integer Divisible by K · 18 lines
Smallest Missing Genetic Value in Each Subtree · 54 lines
Smallest Number in Infinite Set · 31 lines
Smallest Range Covering Elements from K Lists · 35 lines
Smallest Range I · 16 lines
Smallest Range II · 49 lines
Smallest Rotation with Highest Score · 24 lines
Smallest String Starting From Leaf · 26 lines
Smallest String With A Given Numeric Value · 16 lines
Smallest String With Swaps · 66 lines
Smallest Subsequence of Distinct Characters · 27 lines
Smallest Subtree with all the Deepest Nodes · 44 lines
Smallest Sufficient Team · 36 lines
Smallest Value of the Rearranged Number · 31 lines
Snakes and Ladders · 92 lines
Snapshot Array · 36 lines
Solve the Equation · 39 lines
Sort an Array · 45 lines
Sort Array By Parity · 22 lines
Sort Array By Parity II · 23 lines
Sort Characters By Frequency · 39 lines
Sort Colors · 18 lines
Sort Even and Odd Indices Independently · 33 lines
Sorting the Sentence · 9 lines
Sort Integers by The Number of 1 Bits · 39 lines
Sort Integers by The Power Value · 25 lines
Sort Items by Groups Respecting Dependencies · 84 lines
Sort List · 50 lines
Sort the Matrix Diagonally · 34 lines
Soup Servings · 22 lines
Special Array With X Elements Greater Than or Equal X · 18 lines
Special Positions in a Binary Matrix · 27 lines
Spiral Matrix · 25 lines
Spiral Matrix II · 41 lines
Spiral Matrix IV · 55 lines
Split Array into Consecutive Subsequences · 24 lines
Split Array into Fibonacci Sequence · 27 lines
Split Array Largest Sum · 30 lines
Split Array With Same Average · 31 lines
Split a String in Balanced Strings · 15 lines
Split a String Into the Max Number of Unique Substrings · 24 lines
Split Linked List in Parts · 39 lines
Splitting a String Into Descending Consecutive Values · 18 lines
Split Two Strings to Make Palindrome · 34 lines
Sqrt(x) · 9 lines
Squares of a Sorted Array · 18 lines
Stamping The Sequence · 129 lines
Statistics from a Large Sample · 57 lines
Step-By-Step Directions From a Binary Tree Node to Another · 31 lines
Steps to Make Array Non-decreasing · 26 lines
Stickers to Spell Word · 40 lines
Stock Price Fluctuation · 59 lines
Stone Game · 11 lines
Stone Game II · 33 lines
Stone Game III · 32 lines
Stone Game IV · 48 lines
Stone Game IX · 50 lines
Stone Game V · 42 lines
Stone Game VI · 48 lines
Strange Printer · 21 lines
Strange Printer II · 80 lines
Stream of Characters · 42 lines
String Compression · 30 lines
String Compression II · 88 lines
String Matching in an Array · 18 lines
String to Integer (atoi) · 20 lines
String Without AAA or BBB · 26 lines
Strong Password Checker · 80 lines
Strong Password Checker II · 40 lines
Student Attendance Record I · 9 lines
Student Attendance Record II · 29 lines
Subarray Product Less Than K · 19 lines
Subarray Sum Equals K · 22 lines
Subarray Sums Divisible by K · 24 lines
Subarrays with K Different Integers · 24 lines
Subarray With Elements Greater Than Varying Threshold · 38 lines
Subdomain Visit Count · 26 lines
Subrectangle Queries · 25 lines
Subsets · 29 lines
Subsets II · 41 lines
Substrings of Size Three with Distinct Characters · 11 lines
Substring with Concatenation of All Words · 54 lines
Substring With Largest Variance · 37 lines
Subtract the Product and Sum of Digits of an Integer · 11 lines
Successful Pairs of Spells and Potions · 24 lines
Sudoku Solver · 33 lines
Sum Game · 13 lines
Sum of Absolute Differences in a Sorted Array · 16 lines
Sum of All Odd Length Subarrays · 19 lines
Sum of All Subset XOR Totals · 15 lines
Sum of Beauty in the Array · 34 lines
Sum of Beauty of All Substrings · 41 lines
Sum of Digits in Base K · 7 lines
Sum of Digits of String After Convert · 21 lines
Sum of Distances in Tree · 64 lines
Sum of Even Numbers After Queries · 24 lines
Sum of Floored Pairs · 29 lines
Sum of Left Leaves · 12 lines
Sum of Mutated Array Closest to Target · 30 lines
Sum of Nodes with Even-Valued Grandparent · 19 lines
Sum of Numbers With Units Digit K · 16 lines
Sum of Root To Leaf Binary Numbers · 12 lines
Sum of Scores of Built Strings · 41 lines
Sum of Square Numbers · 17 lines
Sum of Subarray Minimums · 50 lines
Sum of Subarray Ranges · 69 lines
Sum of Subsequence Widths · 14 lines
Sum of Total Strength of Wizards · 66 lines
Sum of Two Integers · 6 lines
Sum of Unique Elements · 12 lines
Sum Root to Leaf Numbers · 21 lines
Super Egg Drop · 92 lines
Super Palindromes · 47 lines
Super Pow · 12 lines
Super Ugly Number · 83 lines
Super Washing Machines · 21 lines
Surface Area of 3D Shapes · 28 lines
Surrounded Regions · 36 lines
Swap Adjacent in LR String · 35 lines
Swap For Longest Repeated Character Substring · 54 lines
Swap Nodes in Pairs · 14 lines
Swapping Nodes in a Linked List · 31 lines
Swim in Rising Water · 63 lines
Symmetric Tree · 19 lines
Tag Validator · 115 lines
Tallest Billboard · 20 lines
Target Sum · 57 lines
Task Scheduler II · 15 lines
Teemo Attacking · 16 lines
Text Justification · 63 lines
The Earliest and Latest Rounds Where Players Compete · 51 lines
The k Strongest Values in an Array · 19 lines
The kth Factor of n · 17 lines
The k-th Lexicographical String of All Happy Strings of Length n · 27 lines
The K Weakest Rows in a Matrix · 34 lines
The Latest Time to Catch a Bus · 33 lines
The Number of Full Rounds You Have Played · 14 lines
The Number of Good Subsets · 121 lines
The Number of the Smallest Unoccupied Chair · 27 lines
The Number of Weak Characters in the Game · 17 lines
The Score of Students Solving Math Expression · 66 lines
The Skyline Problem · 57 lines
The Time When the Network Becomes Idle · 81 lines
Third Maximum Number · 23 lines
Thousand Separator · 14 lines
Three Consecutive Odds · 14 lines
Three Divisors · 10 lines
Three Equal Parts · 28 lines
Throne Inheritance · 47 lines
Tiling a Rectangle with the Fewest Squares · 72 lines
Time Based Key-Value Store · 65 lines
Time Needed to Buy Tickets · 18 lines
Time Needed to Inform All Employees · 21 lines
Toeplitz Matrix · 37 lines
Top K Frequent Elements · 16 lines
Top K Frequent Words · 25 lines
Total Appeal of A String · 15 lines
Total Hamming Distance · 14 lines
Transform to Chessboard · 41 lines
Transpose Matrix · 16 lines
Trapping Rain Water · 24 lines
Trapping Rain Water II · 66 lines
Tree of Coprimes · 85 lines
Triangle · 14 lines
Trim a Binary Search Tree · 12 lines
Triples with Bitwise AND Equal To Zero · 19 lines
Truncate Sentence · 15 lines
Tuple with Same Product · 32 lines
Tweet Counts Per Frequency · 67 lines
Two Best Non-Overlapping Events · 34 lines
Two City Scheduling · 23 lines
Two Furthest Houses With Different Colors · 8 lines
Two Out of Three · 11 lines
Two Sum · 19 lines
Two Sum IV - Input is a BST · 14 lines
Ugly Number · 17 lines
Ugly Number II · 17 lines
Ugly Number III · 35 lines
Uncommon Words from Two Sentences · 22 lines
Uncrossed Lines · 14 lines
Unique Binary Search Trees · 19 lines
Unique Binary Search Trees II · 35 lines
Unique Email Addresses · 29 lines
Unique Length-3 Palindromic Subsequences · 53 lines
Unique Morse Code Words · 20 lines
Unique Number of Occurrences · 22 lines
Unique Paths · 29 lines
Unique Paths II · 13 lines
Unique Paths III · 42 lines
Unique Substrings in Wraparound String · 26 lines
Univalued Binary Tree · 18 lines
UTF-8 Validation · 35 lines
Valid Anagram · 15 lines
Valid Arrangement of Pairs · 52 lines
Validate Binary Search Tree · 21 lines
Validate Binary Tree Nodes · 59 lines
Validate IP Address · 60 lines
Validate Stack Sequences · 16 lines
Valid Boomerang · 11 lines
Valid Mountain Array · 19 lines
Valid Number · 18 lines
Valid Palindrome · 30 lines
Valid Palindrome II · 25 lines
Valid Parentheses · 22 lines
Valid Parenthesis String · 23 lines
Valid Perfect Square · 17 lines
Valid Permutations for DI Sequence · 24 lines
Valid Square · 24 lines
Valid Sudoku · 15 lines
Valid Tic-Tac-Toe State · 79 lines
Valid Triangle Number · 17 lines
Verbal Arithmetic Puzzle · 126 lines
Verifying an Alien Dictionary · 35 lines
Verify Preorder Serialization of a Binary Tree · 18 lines
Vertical Order Traversal of a Binary Tree · 55 lines
Video Stitching · 29 lines
Vowels of All Substrings · 19 lines
Vowel Spellchecker · 33 lines
Walking Robot Simulation · 64 lines
Walking Robot Simulation II · 35 lines
Water and Jug Problem · 14 lines
Water Bottles · 17 lines
Watering Plants · 16 lines
Watering Plants II · 47 lines
Ways to Make a Fair Array · 28 lines
Ways to Split Array Into Three Subarrays · 59 lines
Where Will the Ball Fall · 22 lines
Widest Vertical Area Between Two Points Containing No Points · 20 lines
Wiggle Sort II · 17 lines
Wiggle Subsequence · 42 lines
Wildcard Matching · 36 lines
Word Break · 22 lines
Word Break II · 30 lines
Word Ladder · 40 lines
Word Ladder II · 108 lines
Word Pattern · 21 lines
Word Search · 35 lines
Word Search II · 75 lines
Word Subsets · 32 lines
X of a Kind in a Deck of Cards · 16 lines
XOR Operation in an Array · 8 lines
XOR Queries of a Subarray · 24 lines
Zigzag Conversion · 22 lines
Zuma Game · 216 lines