Solutions & Explanations

Browse 4,029+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,029 Solutions961 Easy2102 Medium966 Hard

Title	Difficulty	Acceptance	Topics	Solution
2830. Maximize the Profit as the Salesman	Medium	38.7%	Array Binary Search+3	Read
2831. Find the Longest Equal Subarray	Medium	38.4%	Array Binary Search+2	Read
2832. Maximal Range That Each Element Is Maximum in It	Medium	75.5%	Array Monotonic Stack+1	Read
2834. Find the Minimum Possible Sum of a Beautiful Array	Medium	35.1%	Greedy Math	Read
2838. Maximum Coins Heroes Can Collect	Medium	68.7%	Array Binary Search+3	Read
2840. Check if Strings Can be Made Equal With Operations II	Medium	73.9%	Hash Table Sorting+1	Read
2841. Maximum Sum of Almost Unique Subarray	Medium	41.5%	Array Hash Table+1	Read
2844. Minimum Operations to Make a Special Number	Medium	38.5%	Enumeration Greedy+2	Read
2845. Count of Interesting Subarrays	Medium	58.0%	Array Hash Table+1	Read
2847. Smallest Number With Given Digit Product	Medium	43.8%	Greedy Math	Read
2849. Determine if a Cell Is Reachable at a Given Time	Medium	37.2%	Math	Read
2850. Minimum Moves to Spread Stones Over Grid	Medium	46.1%	Array Breadth-First Search+2	Read
2852. Sum of Remoteness of All Cells	Medium	70.8%	Array Breadth-First Search+4	Read
2854. Rolling Average Steps	Medium	67.8%	Database	Read
2856. Minimum Array Length After Pair Removals	Medium	27.8%	Array Binary Search+4	Read
2857. Count Pairs of Points With Distance k	Medium	32.9%	Array Bit Manipulation+1	Read
2860. Happy Students	Medium	50.9%	Array Enumeration+1	Read
2861. Maximum Number of Alloys	Medium	41.2%	Array Binary Search	Read
2863. Maximum Length of Semi-Decreasing Subarrays	Medium	70.5%	Array Monotonic Stack+2	Read
2865. Beautiful Towers I	Medium	44.4%	Array Monotonic Stack+1	Read
2866. Beautiful Towers II	Medium	36.9%	Array Monotonic Stack+1	Read
2870. Minimum Number of Operations to Make Array Empty	Medium	61.9%	Array Counting+2	Read
2871. Split Array Into Maximum Number of Subarrays	Medium	42.4%	Array Bit Manipulation+1	Read
2874. Maximum Value of an Ordered Triplet II	Medium	56.4%	Array	Read
2875. Minimum Size Subarray in Infinite Array	Medium	32.1%	Array Hash Table+2	Read
2892. Minimizing Array After Replacing Pairs With Their Product	Medium	40.6%	Array Dynamic Programming+1	Read
2893. Calculate Orders Within Each Interval	Medium	67.2%	Database	Read
2895. Minimum Processing Time	Medium	70.3%	Array Greedy+1	Read
2896. Apply Operations to Make Two Strings Equal	Medium	27.7%	Dynamic Programming String	Read
2898. Maximum Linear Stock Score	Medium	61.7%	Array Hash Table	Read
2901. Longest Unequal Adjacent Groups Subsequence II	Medium	51.4%	Array Dynamic Programming+1	Read
2904. Shortest and Lexicographically Smallest Beautiful String	Medium	59.8%	Sliding Window String	Read
2905. Find Indices With Index and Value Difference II	Medium	32.6%	Array Two Pointers	Read
2906. Construct Product Matrix	Medium	51.7%	Array Matrix+1	Read
2907. Maximum Profitable Triplets With Increasing Prices I	Medium	56.2%	Array Binary Indexed Tree+1	Read
2909. Minimum Sum of Mountain Triplets II	Medium	54.5%	Array	Read
2910. Minimum Number of Groups to Create a Valid Assignment	Medium	25.0%	Array Greedy+1	Read
2914. Minimum Number of Changes to Make Binary String Beautiful	Medium	76.4%	String	Read
2915. Length of the Longest Subsequence That Sums to Target	Medium	40.0%	Array Dynamic Programming	Read
2918. Minimum Equal Sum of Two Arrays After Replacing Zeros	Medium	50.2%	Array Greedy	Read
2919. Minimum Increment Operations to Make Array Beautiful	Medium	34.7%	Array Dynamic Programming	Read
2922. Market Analysis III	Medium	41.1%	Database	Read
2924. Find Champion II	Medium	70.3%	Graph	Read
2925. Maximum Score After Applying Operations on a Tree	Medium	47.2%	Depth-First Search Dynamic Programming+1	Read
2929. Distribute Candies Among Children II	Medium	55.7%	Combinatorics Enumeration+1	Read
2930. Number of Strings Which Can Be Rearranged to Contain Substring	Medium	57.0%	Combinatorics Dynamic Programming+1	Read
2933. High-Access Employees	Medium	47.4%	Array Hash Table+2	Read
2934. Minimum Operations to Maximize Last Elements in Arrays	Medium	43.7%	Array Enumeration	Read
2936. Number of Equal Numbers Blocks	Medium	62.5%	Array Binary Search+1	Read
2938. Separate Black and White Balls	Medium	64.0%	Greedy String+1	Read

#2830Medium

Maximize the Profit as the Salesman

ArrayBinary SearchDynamic Programming+2

Acceptance: 38.7%

#2831Medium

Find the Longest Equal Subarray

ArrayBinary SearchHash Table+1

Acceptance: 38.4%

#2832Medium

Maximal Range That Each Element Is Maximum in It

ArrayMonotonic StackStack

Acceptance: 75.5%

#2834Medium

Find the Minimum Possible Sum of a Beautiful Array

GreedyMath

Acceptance: 35.1%

#2838Medium

Maximum Coins Heroes Can Collect

ArrayBinary SearchPrefix Sum+2

Acceptance: 68.7%

#2840Medium

Check if Strings Can be Made Equal With Operations II

Hash TableSortingString

Acceptance: 73.9%

#2841Medium

Maximum Sum of Almost Unique Subarray

ArrayHash TableSliding Window

Acceptance: 41.5%

#2844Medium

Minimum Operations to Make a Special Number

EnumerationGreedyMath+1

Acceptance: 38.5%

#2845Medium

Count of Interesting Subarrays

ArrayHash TablePrefix Sum

Acceptance: 58.0%

#2847Medium

Smallest Number With Given Digit Product

GreedyMath

Acceptance: 43.8%

#2849Medium

Determine if a Cell Is Reachable at a Given Time

Math

Acceptance: 37.2%

#2850Medium

Minimum Moves to Spread Stones Over Grid

ArrayBreadth-First SearchDynamic Programming+1

Acceptance: 46.1%

#2852Medium

Sum of Remoteness of All Cells

ArrayBreadth-First SearchDepth-First Search+3

Acceptance: 70.8%

#2854Medium

Rolling Average Steps

Database

Acceptance: 67.8%

#2856Medium

Minimum Array Length After Pair Removals

ArrayBinary SearchCounting+3

Acceptance: 27.8%

#2857Medium

Count Pairs of Points With Distance k

ArrayBit ManipulationHash Table

Acceptance: 32.9%

#2860Medium

Happy Students

ArrayEnumerationSorting

Acceptance: 50.9%

#2861Medium

Maximum Number of Alloys

ArrayBinary Search

Acceptance: 41.2%

#2863Medium

Maximum Length of Semi-Decreasing Subarrays

ArrayMonotonic StackSorting+1

Acceptance: 70.5%

#2865Medium

Beautiful Towers I

ArrayMonotonic StackStack

Acceptance: 44.4%

#2866Medium

Beautiful Towers II

ArrayMonotonic StackStack

Acceptance: 36.9%

#2870Medium

Minimum Number of Operations to Make Array Empty

ArrayCountingGreedy+1

Acceptance: 61.9%

#2871Medium

Split Array Into Maximum Number of Subarrays

ArrayBit ManipulationGreedy

Acceptance: 42.4%

#2874Medium

Maximum Value of an Ordered Triplet II

Array

Acceptance: 56.4%

#2875Medium

Minimum Size Subarray in Infinite Array

ArrayHash TablePrefix Sum+1

Acceptance: 32.1%

#2892Medium

Minimizing Array After Replacing Pairs With Their Product

ArrayDynamic ProgrammingGreedy

Acceptance: 40.6%

#2893Medium

Calculate Orders Within Each Interval

Database

Acceptance: 67.2%

#2895Medium

Minimum Processing Time

ArrayGreedySorting

Acceptance: 70.3%

#2896Medium

Apply Operations to Make Two Strings Equal

Dynamic ProgrammingString

Acceptance: 27.7%

#2898Medium

Maximum Linear Stock Score

ArrayHash Table

Acceptance: 61.7%

#2901Medium

Longest Unequal Adjacent Groups Subsequence II

ArrayDynamic ProgrammingString

Acceptance: 51.4%

#2904Medium

Shortest and Lexicographically Smallest Beautiful String

Sliding WindowString

Acceptance: 59.8%

#2905Medium

Find Indices With Index and Value Difference II

ArrayTwo Pointers

Acceptance: 32.6%

#2906Medium

Construct Product Matrix

ArrayMatrixPrefix Sum

Acceptance: 51.7%

#2907Medium

Maximum Profitable Triplets With Increasing Prices I

ArrayBinary Indexed TreeSegment Tree

Acceptance: 56.2%

#2909Medium

Minimum Sum of Mountain Triplets II

Array

Acceptance: 54.5%

#2910Medium

Minimum Number of Groups to Create a Valid Assignment

ArrayGreedyHash Table

Acceptance: 25.0%

#2914Medium

Minimum Number of Changes to Make Binary String Beautiful

String

Acceptance: 76.4%

#2915Medium

Length of the Longest Subsequence That Sums to Target

ArrayDynamic Programming

Acceptance: 40.0%

#2918Medium

Minimum Equal Sum of Two Arrays After Replacing Zeros

ArrayGreedy

Acceptance: 50.2%

#2919Medium

Minimum Increment Operations to Make Array Beautiful

ArrayDynamic Programming

Acceptance: 34.7%

#2922Medium

Market Analysis III

Database

Acceptance: 41.1%

#2924Medium

Find Champion II

Graph

Acceptance: 70.3%

#2925Medium

Maximum Score After Applying Operations on a Tree

Depth-First SearchDynamic ProgrammingTree

Acceptance: 47.2%

#2929Medium

Distribute Candies Among Children II

CombinatoricsEnumerationMath

Acceptance: 55.7%

#2930Medium

Number of Strings Which Can Be Rearranged to Contain Substring

CombinatoricsDynamic ProgrammingMath

Acceptance: 57.0%

#2933Medium

High-Access Employees

ArrayHash TableSorting+1

Acceptance: 47.4%

#2934Medium

Minimum Operations to Maximize Last Elements in Arrays

ArrayEnumeration

Acceptance: 43.7%

#2936Medium

Number of Equal Numbers Blocks

ArrayBinary SearchInteractive

Acceptance: 62.5%

#2938Medium

Separate Black and White Balls

GreedyStringTwo Pointers

Acceptance: 64.0%

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