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Count Items Matching a Rule

Count Items Matching a Rule

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1 min read
Number of Smooth Descent Periods of a Stock

Number of Smooth Descent Periods of a Stock

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1 min read
Permutation in String

Permutation in String

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1 min read
Minimum Distance Between BST Nodes

Minimum Distance Between BST Nodes

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1 min read
Even Odd Tree

Even Odd Tree

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2 min read
Path With Minimum Effort

Path With Minimum Effort

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2 min read
Next Greater Node In Linked List

Next Greater Node In Linked List

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1 min read
Bulls and Cows

Bulls and Cows

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2 min read
Minimum Number of Operations to Move All Balls to Each Box

Minimum Number of Operations to Move All Balls to Each Box

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1 min read
Increasing Triplet Subsequence

Increasing Triplet Subsequence

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1 min read
Longest Palindrome

Longest Palindrome

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1 min read
Reduce Array Size to The Half

Reduce Array Size to The Half

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1 min read
Triangle

Triangle

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1 min read
Find First and Last Position of Element in Sorted Array

Find First and Last Position of Element in Sorted Array

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1 min read
Sum of Root To Leaf Binary Numbers

Sum of Root To Leaf Binary Numbers

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1 min read
Shortest Palindrome

Shortest Palindrome

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1 min read
Design a Text Editor

Design a Text Editor

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3 min read
Replace Elements in an Array

Replace Elements in an Array

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2 min read
Arithmetic Slices

Arithmetic Slices

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1 min read
Russian Doll Envelopes

Russian Doll Envelopes

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1 min read
K-th Symbol in Grammar

K-th Symbol in Grammar

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1 min read
Find First Palindromic String in the Array

Find First Palindromic String in the Array

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1 min read
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts

Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts

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2 min read
Factorial Trailing Zeroes

Factorial Trailing Zeroes

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1 min read
Basic Calculator II

Basic Calculator II

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1 min read
All Ancestors of a Node in a Directed Acyclic Graph

All Ancestors of a Node in a Directed Acyclic Graph

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2 min read
Unique Paths II

Unique Paths II

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2 min read
Best Time to Buy and Sell Stock

Best Time to Buy and Sell Stock

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1 min read
Jump Game III

Jump Game III

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1 min read
Insert Delete GetRandom O(1)

Insert Delete GetRandom O(1)

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2 min read
Power of Three

Power of Three

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1 min read
Repeated Substring Pattern

Repeated Substring Pattern

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1 min read
Keyboard Row

Keyboard Row

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1 min read
Construct Binary Search Tree from Preorder Traversal

Construct Binary Search Tree from Preorder Traversal

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2 min read
Push Dominoes

Push Dominoes

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2 min read
Find Center of Star Graph

Find Center of Star Graph

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1 min read
Unique Binary Search Trees

Unique Binary Search Trees

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1 min read
3Sum

3Sum

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1 min read
Random Flip Matrix

Random Flip Matrix

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2 min read
Reverse Prefix of Word

Reverse Prefix of Word

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1 min read
Removing Minimum Number of Magic Beans

Removing Minimum Number of Magic Beans

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2 min read
Sort Array by Increasing Frequency

Sort Array by Increasing Frequency

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1 min read
Check if There Is a Valid Parentheses String Path

Check if There Is a Valid Parentheses String Path

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2 min read
Longest Common Subsequence

Longest Common Subsequence

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1 min read
Design a Stack With Increment Operation

Design a Stack With Increment Operation

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2 min read
Contains Duplicate

Contains Duplicate

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1 min read
Palindromic Substrings

Palindromic Substrings

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1 min read
Check if Binary String Has at Most One Segment of Ones

Check if Binary String Has at Most One Segment of Ones

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1 min read
Sort the Jumbled Numbers

Sort the Jumbled Numbers

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2 min read
Sequentially Ordinal Rank Tracker

Sequentially Ordinal Rank Tracker

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3 min read
Linked List Random Node

Linked List Random Node

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2 min read
Insert Interval

Insert Interval

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1 min read
Find All Anagrams in a String

Find All Anagrams in a String

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1 min read
Jump Game II

Jump Game II

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1 min read
K Divisible Elements Subarrays

K Divisible Elements Subarrays

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2 min read
Find Smallest Letter Greater Than Target

Find Smallest Letter Greater Than Target

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1 min read
Binary Search Tree Iterator

Binary Search Tree Iterator

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2 min read
Remove All Adjacent Duplicates in String II

Remove All Adjacent Duplicates in String II

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1 min read
Remove Invalid Parentheses

Remove Invalid Parentheses

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1 min read
Design an ATM Machine

Design an ATM Machine

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3 min read
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