Solutions & Explanations

Browse 4,030+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,030 Solutions961 Easy2102 Medium967 Hard

Title	Difficulty	Acceptance	Topics	Solution
3001. Minimum Moves to Capture The Queen	Medium	22.3%	Array Enumeration	Read
3002. Maximum Size of a Set After Removals	Medium	46.2%	Array Greedy+1	Read
3003. Maximize the Number of Partitions After Operations	Hard	53.5%	Bit Manipulation Bitmask+2	Read
3004. Maximum Subtree of the Same Color	Medium	59.2%	Array Depth-First Search+2	Read
3005. Count Elements With Maximum Frequency	Easy	79.8%	Array Counting+1	Read
3006. Find Beautiful Indices in the Given Array I	Medium	41.2%	Binary Search Hash Function+4	Read
3007. Maximum Number That Sum of the Prices Is Less Than or Equal to K	Medium	38.4%	Binary Search Bit Manipulation+1	Read
3008. Find Beautiful Indices in the Given Array II	Hard	28.3%	Binary Search Hash Function+4	Read
3009. Maximum Number of Intersections on the Chart	Hard	45.5%	Array Binary Indexed Tree+2	Read
3010. Divide an Array Into Subarrays With Minimum Cost I	Easy	80.5%	Array Enumeration+1	Read
3011. Find if Array Can Be Sorted	Medium	66.4%	Array Bit Manipulation+1	Read
3012. Minimize Length of Array Using Operations	Medium	35.7%	Array Greedy+2	Read
3013. Divide an Array Into Subarrays With Minimum Cost II	Hard	54.7%	Array Hash Table+2	Read
3014. Minimum Number of Pushes to Type Word I	Easy	77.1%	Greedy Math+1	Read
3015. Count the Number of Houses at a Certain Distance I	Medium	58.2%	Breadth-First Search Graph+1	Read
3016. Minimum Number of Pushes to Type Word II	Medium	83.2%	Counting Greedy+3	Read
3017. Count the Number of Houses at a Certain Distance II	Hard	23.7%	Graph Prefix Sum	Read
3018. Maximum Number of Removal Queries That Can Be Processed I	Hard	44.8%	Array Dynamic Programming	Read
3019. Number of Changing Keys	Easy	80.6%	String	Read
3020. Find the Maximum Number of Elements in Subset	Medium	42.2%	Array Enumeration+1	Read
3021. Alice and Bob Playing Flower Game	Medium	60.2%	Math	Read
3022. Minimize OR of Remaining Elements Using Operations	Hard	29.6%	Array Bit Manipulation+1	Read
3023. Find Pattern in Infinite Stream I	Medium	57.5%	Array Hash Function+3	Read
3024. Type of Triangle	Easy	44.1%	Array Math+1	Read
3025. Find the Number of Ways to Place People I	Medium	64.0%	Array Enumeration+3	Read
3026. Maximum Good Subarray Sum	Medium	22.1%	Array Hash Table+1	Read
3027. Find the Number of Ways to Place People II	Hard	64.4%	Array Enumeration+3	Read
3028. Ant on the Boundary	Easy	74.6%	Array Prefix Sum+1	Read
3029. Minimum Time to Revert Word to Initial State I	Medium	42.4%	Hash Function Rolling Hash+2	Read
3030. Find the Grid of Region Average	Medium	43.0%	Array Matrix	Read
3031. Minimum Time to Revert Word to Initial State II	Hard	35.1%	Hash Function Rolling Hash+2	Read
3032. Count Numbers With Unique Digits II	Easy	87.4%	Dynamic Programming Hash Table+1	Read
3033. Modify the Matrix	Easy	69.1%	Array Matrix	Read
3034. Number of Subarrays That Match a Pattern I	Medium	67.9%	Array Hash Function+2	Read
3035. Maximum Palindromes After Operations	Medium	47.2%	Array Counting+4	Read
3036. Number of Subarrays That Match a Pattern II	Hard	34.1%	Array Hash Function+2	Read
3037. Find Pattern in Infinite Stream II	Hard	67.5%	Array Hash Function+3	Read
3038. Maximum Number of Operations With the Same Score I	Easy	52.8%	Array Simulation	Read
3039. Apply Operations to Make String Empty	Medium	57.5%	Array Counting+2	Read
3040. Maximum Number of Operations With the Same Score II	Medium	34.1%	Array Dynamic Programming+1	Read
3041. Maximize Consecutive Elements in an Array After Modification	Hard	33.7%	Array Dynamic Programming+1	Read
3042. Count Prefix and Suffix Pairs I	Easy	77.8%	Array Hash Function+4	Read
3043. Find the Length of the Longest Common Prefix	Medium	62.1%	Array Hash Table+2	Read
3044. Most Frequent Prime	Medium	45.5%	Array Counting+5	Read
3045. Count Prefix and Suffix Pairs II	Hard	28.2%	Array Hash Function+4	Read
3046. Split the Array	Easy	61.7%	Array Counting+1	Read
3047. Find the Largest Area of Square Inside Two Rectangles	Medium	66.9%	Array Geometry+1	Read
3048. Earliest Second to Mark Indices I	Medium	36.7%	Array Binary Search	Read
3049. Earliest Second to Mark Indices II	Hard	22.6%	Array Binary Search+2	Read
3050. Pizza Toppings Cost Analysis	Medium	66.2%	Database	Read

#3001Medium

Minimum Moves to Capture The Queen

ArrayEnumeration

Acceptance: 22.3%

#3002Medium

Maximum Size of a Set After Removals

ArrayGreedyHash Table

Acceptance: 46.2%

#3003Hard

Maximize the Number of Partitions After Operations

Bit ManipulationBitmaskDynamic Programming+1

Acceptance: 53.5%

#3004Medium

Maximum Subtree of the Same Color

ArrayDepth-First SearchDynamic Programming+1

Acceptance: 59.2%

#3005Easy

Count Elements With Maximum Frequency

ArrayCountingHash Table

Acceptance: 79.8%

#3006Medium

Find Beautiful Indices in the Given Array I

Binary SearchHash FunctionRolling Hash+3

Acceptance: 41.2%

#3007Medium

Maximum Number That Sum of the Prices Is Less Than or Equal to K

Binary SearchBit ManipulationDynamic Programming

Acceptance: 38.4%

#3008Hard

Find Beautiful Indices in the Given Array II

Binary SearchHash FunctionRolling Hash+3

Acceptance: 28.3%

#3009Hard

Maximum Number of Intersections on the Chart

ArrayBinary Indexed TreeGeometry+1

Acceptance: 45.5%

#3010Easy

Divide an Array Into Subarrays With Minimum Cost I

ArrayEnumerationSorting

Acceptance: 80.5%

#3011Medium

Find if Array Can Be Sorted

ArrayBit ManipulationSorting

Acceptance: 66.4%

#3012Medium

Minimize Length of Array Using Operations

ArrayGreedyMath+1

Acceptance: 35.7%

#3013Hard

Divide an Array Into Subarrays With Minimum Cost II

ArrayHash TableHeap (Priority Queue)+1

Acceptance: 54.7%

#3014Easy

Minimum Number of Pushes to Type Word I

GreedyMathString

Acceptance: 77.1%

#3015Medium

Count the Number of Houses at a Certain Distance I

Breadth-First SearchGraphPrefix Sum

Acceptance: 58.2%

#3016Medium

Minimum Number of Pushes to Type Word II

CountingGreedyHash Table+2

Acceptance: 83.2%

#3017Hard

Count the Number of Houses at a Certain Distance II

GraphPrefix Sum

Acceptance: 23.7%

#3018Hard

Maximum Number of Removal Queries That Can Be Processed I

ArrayDynamic Programming

Acceptance: 44.8%

#3019Easy

Number of Changing Keys

String

Acceptance: 80.6%

#3020Medium

Find the Maximum Number of Elements in Subset

ArrayEnumerationHash Table

Acceptance: 42.2%

#3021Medium

Alice and Bob Playing Flower Game

Math

Acceptance: 60.2%

#3022Hard

Minimize OR of Remaining Elements Using Operations

ArrayBit ManipulationGreedy

Acceptance: 29.6%

#3023Medium

Find Pattern in Infinite Stream I

ArrayHash FunctionRolling Hash+2

Acceptance: 57.5%

#3024Easy

Type of Triangle

ArrayMathSorting

Acceptance: 44.1%

#3025Medium

Find the Number of Ways to Place People I

ArrayEnumerationGeometry+2

Acceptance: 64.0%

#3026Medium

Maximum Good Subarray Sum

ArrayHash TablePrefix Sum

Acceptance: 22.1%

#3027Hard

Find the Number of Ways to Place People II

ArrayEnumerationGeometry+2

Acceptance: 64.4%

#3028Easy

Ant on the Boundary

ArrayPrefix SumSimulation

Acceptance: 74.6%

#3029Medium

Minimum Time to Revert Word to Initial State I

Hash FunctionRolling HashString+1

Acceptance: 42.4%

#3030Medium

Find the Grid of Region Average

ArrayMatrix

Acceptance: 43.0%

#3031Hard

Minimum Time to Revert Word to Initial State II

Hash FunctionRolling HashString+1

Acceptance: 35.1%

#3032Easy

Count Numbers With Unique Digits II

Dynamic ProgrammingHash TableMath

Acceptance: 87.4%

#3033Easy

Modify the Matrix

ArrayMatrix

Acceptance: 69.1%

#3034Medium

Number of Subarrays That Match a Pattern I

ArrayHash FunctionRolling Hash+1

Acceptance: 67.9%

#3035Medium

Maximum Palindromes After Operations

ArrayCountingGreedy+3

Acceptance: 47.2%

#3036Hard

Number of Subarrays That Match a Pattern II

ArrayHash FunctionRolling Hash+1

Acceptance: 34.1%

#3037Hard

Find Pattern in Infinite Stream II

ArrayHash FunctionRolling Hash+2

Acceptance: 67.5%

#3038Easy

Maximum Number of Operations With the Same Score I

ArraySimulation

Acceptance: 52.8%

#3039Medium

Apply Operations to Make String Empty

ArrayCountingHash Table+1

Acceptance: 57.5%

#3040Medium

Maximum Number of Operations With the Same Score II

ArrayDynamic ProgrammingMemoization

Acceptance: 34.1%

#3041Hard

Maximize Consecutive Elements in an Array After Modification

ArrayDynamic ProgrammingSorting

Acceptance: 33.7%

#3042Easy

Count Prefix and Suffix Pairs I

ArrayHash FunctionRolling Hash+3

Acceptance: 77.8%

#3043Medium

Find the Length of the Longest Common Prefix

ArrayHash TableString+1

Acceptance: 62.1%

#3044Medium

Most Frequent Prime

ArrayCountingEnumeration+4

Acceptance: 45.5%

#3045Hard

Count Prefix and Suffix Pairs II

ArrayHash FunctionRolling Hash+3

Acceptance: 28.2%

#3046Easy

Split the Array

ArrayCountingHash Table

Acceptance: 61.7%

#3047Medium

Find the Largest Area of Square Inside Two Rectangles

ArrayGeometryMath

Acceptance: 66.9%

#3048Medium

Earliest Second to Mark Indices I

ArrayBinary Search

Acceptance: 36.7%

#3049Hard

Earliest Second to Mark Indices II

ArrayBinary SearchGreedy+1

Acceptance: 22.6%

#3050Medium

Pizza Toppings Cost Analysis

Database

Acceptance: 66.2%

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