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1-bit and 2-bit Characters

1-bit and 2-bit Characters

2
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1 min read
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

1
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2 min read
Binary Tree Tilt

Binary Tree Tilt

1
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2 min read
Remove Outermost Parentheses

Remove Outermost Parentheses

1
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1 min read
Baseball Game

Baseball Game

1
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2 min read
Letter Tile Possibilities

Letter Tile Possibilities

1
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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

1
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1 min read
Check Completeness of a Binary Tree

Check Completeness of a Binary Tree

1
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1 min read
Flatten a Multilevel Doubly Linked List

Flatten a Multilevel Doubly Linked List

1
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2 min read
Clumsy Factorial

Clumsy Factorial

4
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1 min read
Thousand Separator

Thousand Separator

3
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1 min read
Maximum Difference Between Node and Ancestor

Maximum Difference Between Node and Ancestor

4
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1 min read
Decode the Slanted Ciphertext

Decode the Slanted Ciphertext

4
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2 min read
Integer to Roman

Integer to Roman

4
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2 min read
Flipping an Image

Flipping an Image

4
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1 min read
Remove Linked List Elements

Remove Linked List Elements

4
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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

4
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1 min read
Find Elements in a Contaminated Binary Tree

Find Elements in a Contaminated Binary Tree

4
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2 min read
Delete Columns to Make Sorted

Delete Columns to Make Sorted

4
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2 min read
Ransom Note

Ransom Note

4
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1 min read
Sort the Matrix Diagonally

Sort the Matrix Diagonally

4
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2 min read
Invert Binary Tree

Invert Binary Tree

4
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1 min read
Detect Capital

Detect Capital

4
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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

4
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1 min read
Rotate Array

Rotate Array

4
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1 min read
Insert Delete GetRandom O(1) - Duplicates allowed

Insert Delete GetRandom O(1) - Duplicates allowed

4
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2 min read
Spiral Matrix II

Spiral Matrix II

4
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1 min read
Binary Tree Level Order Traversal II

Binary Tree Level Order Traversal II

4
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1 min read
Binary Tree Zigzag Level Order Traversal

Binary Tree Zigzag Level Order Traversal

4
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1 min read
Binary Prefix Divisible By 5

Binary Prefix Divisible By 5

4
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1 min read
Length of Last Word

Length of Last Word

4
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1 min read
Group Anagrams

Group Anagrams

4
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1 min read
Sum of Digits of String After Convert

Sum of Digits of String After Convert

4
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1 min read
Word Search

Word Search

4
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2 min read
Add Two Numbers

Add Two Numbers

4
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1 min read
Remove Digit From Number to Maximize Result

Remove Digit From Number to Maximize Result

4
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1 min read
Last Substring in Lexicographical Order

Last Substring in Lexicographical Order

4
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1 min read
Evaluate Division

Evaluate Division

4
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2 min read
Base 7

Base 7

3
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1 min read
Self Dividing Numbers

Self Dividing Numbers

3
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1 min read
Apply Discount to Prices

Apply Discount to Prices

3
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2 min read
Remove Covered Intervals

Remove Covered Intervals

3
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1 min read
Maximum Depth of N-ary Tree

Maximum Depth of N-ary Tree

4
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1 min read
Sort List

Sort List

4
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1 min read
Max Points on a Line

Max Points on a Line

4
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2 min read
Validate Stack Sequences

Validate Stack Sequences

4
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1 min read
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