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Zigzag Conversion

Zigzag Conversion

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1 min read
Count Common Words With One Occurrence

Count Common Words With One Occurrence

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1 min read
K Closest Points to Origin

K Closest Points to Origin

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1 min read
Min Stack

Min Stack

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2 min read
Longest Happy String

Longest Happy String

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1 min read
Peeking Iterator

Peeking Iterator

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2 min read
Largest Number

Largest Number

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1 min read
Reverse Only Letters

Reverse Only Letters

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1 min read
Peak Index in a Mountain Array

Peak Index in a Mountain Array

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1 min read
Maximum Product of Three Numbers

Maximum Product of Three Numbers

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1 min read
Symmetric Tree

Symmetric Tree

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1 min read
Maximal Network Rank

Maximal Network Rank

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2 min read
Binary Tree Tilt

Binary Tree Tilt

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2 min read
Remove Outermost Parentheses

Remove Outermost Parentheses

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1 min read
Baseball Game

Baseball Game

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2 min read
Letter Tile Possibilities

Letter Tile Possibilities

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1 min read
Maximum Twin Sum of a Linked List

Maximum Twin Sum of a Linked List

1
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2 min read
Consecutive Characters

Consecutive Characters

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1 min read
Minimum Falling Path Sum

Minimum Falling Path Sum

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1 min read
Check Completeness of a Binary Tree

Check Completeness of a Binary Tree

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1 min read
Flatten a Multilevel Doubly Linked List

Flatten a Multilevel Doubly Linked List

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2 min read
Clumsy Factorial

Clumsy Factorial

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1 min read
Thousand Separator

Thousand Separator

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1 min read
Maximum Difference Between Node and Ancestor

Maximum Difference Between Node and Ancestor

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1 min read
Decode the Slanted Ciphertext

Decode the Slanted Ciphertext

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2 min read
Integer to Roman

Integer to Roman

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2 min read
Flipping an Image

Flipping an Image

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1 min read
Remove Linked List Elements

Remove Linked List Elements

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1 min read
Check if Number Has Equal Digit Count and Digit Value

Check if Number Has Equal Digit Count and Digit Value

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1 min read
Find Elements in a Contaminated Binary Tree

Find Elements in a Contaminated Binary Tree

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2 min read
Delete Columns to Make Sorted

Delete Columns to Make Sorted

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2 min read
Ransom Note

Ransom Note

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1 min read
Sort the Matrix Diagonally

Sort the Matrix Diagonally

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2 min read
Invert Binary Tree

Invert Binary Tree

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1 min read
Detect Capital

Detect Capital

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1 min read
Height Checker

Height Checker

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1 min read
Container With Most Water

Container With Most Water

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1 min read
Rotate Array

Rotate Array

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1 min read
Insert Delete GetRandom O(1) - Duplicates allowed

Insert Delete GetRandom O(1) - Duplicates allowed

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2 min read
Spiral Matrix II

Spiral Matrix II

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1 min read
Binary Tree Level Order Traversal II

Binary Tree Level Order Traversal II

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1 min read
Binary Tree Zigzag Level Order Traversal

Binary Tree Zigzag Level Order Traversal

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1 min read
Binary Prefix Divisible By 5

Binary Prefix Divisible By 5

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1 min read
Length of Last Word

Length of Last Word

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1 min read
Group Anagrams

Group Anagrams

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1 min read
Sum of Digits of String After Convert

Sum of Digits of String After Convert

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1 min read
Word Search

Word Search

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2 min read
Add Two Numbers

Add Two Numbers

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1 min read
Remove Digit From Number to Maximize Result

Remove Digit From Number to Maximize Result

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1 min read
Last Substring in Lexicographical Order

Last Substring in Lexicographical Order

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1 min read
Evaluate Division

Evaluate Division

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2 min read
Base 7

Base 7

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1 min read
Self Dividing Numbers

Self Dividing Numbers

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1 min read
Apply Discount to Prices

Apply Discount to Prices

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2 min read
Remove Covered Intervals

Remove Covered Intervals

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1 min read
Maximum Depth of N-ary Tree

Maximum Depth of N-ary Tree

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1 min read
Sort List

Sort List

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1 min read
Max Points on a Line

Max Points on a Line

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2 min read
Validate Stack Sequences

Validate Stack Sequences

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1 min read
Finding 3-Digit Even Numbers

Finding 3-Digit Even Numbers

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2 min read
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