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
2151. Maximum Good People Based on Statements	Hard	52.9%	Array Backtracking+2	Read
2152. Minimum Number of Lines to Cover Points	Medium	43.9%	Array Backtracking+6	Read
2153. The Number of Passengers in Each Bus II	Hard	39.2%	Database	Read
2154. Keep Multiplying Found Values by Two	Easy	75.1%	Array Hash Table+2	Read
2155. All Divisions With the Highest Score of a Binary Array	Medium	65.5%	Array	Read
2156. Find Substring With Given Hash Value	Hard	26.7%	Hash Function Rolling Hash+2	Read
2157. Groups of Strings	Hard	28.2%	Bit Manipulation String+1	Read
2158. Amount of New Area Painted Each Day	Hard	55.3%	Array Ordered Set+1	Read
2159. Order Two Columns Independently	Medium	60.5%	Database	Read
2160. Minimum Sum of Four Digit Number After Splitting Digits	Easy	86.2%	Greedy Math+1	Read
2161. Partition Array According to Given Pivot	Medium	90.8%	Array Simulation+1	Read
2162. Minimum Cost to Set Cooking Time	Medium	45.0%	Enumeration Math	Read
2163. Minimum Difference in Sums After Removal of Elements	Hard	69.8%	Array Dynamic Programming+1	Read
2164. Sort Even and Odd Indices Independently	Easy	63.2%	Array Sorting	Read
2165. Smallest Value of the Rearranged Number	Medium	53.5%	Math Sorting	Read
2166. Design Bitset	Medium	32.7%	Array Design+2	Read
2167. Minimum Time to Remove All Cars Containing Illegal Goods	Hard	42.2%	Dynamic Programming String	Read
2168. Unique Substrings With Equal Digit Frequency	Medium	64.6%	Counting Hash Function+3	Read
2169. Count Operations to Obtain Zero	Easy	79.8%	Math Simulation	Read
2170. Minimum Operations to Make the Array Alternating	Medium	35.7%	Array Counting+2	Read
2171. Removing Minimum Number of Magic Beans	Medium	44.5%	Array Enumeration+3	Read
2172. Maximum AND Sum of Array	Hard	50.8%	Array Bit Manipulation+2	Read
2173. Longest Winning Streak	Hard	52.9%	Database	Read
2174. Remove All Ones With Row and Column Flips II	Medium	67.2%	Array Bit Manipulation+2	Read
2175. The Change in Global Rankings	Medium	60.1%	Database	Read
2176. Count Equal and Divisible Pairs in an Array	Easy	84.0%	Array	Read
2177. Find Three Consecutive Integers That Sum to a Given Number	Medium	65.3%	Math Simulation	Read
2178. Maximum Split of Positive Even Integers	Medium	59.9%	Backtracking Greedy+1	Read
2179. Count Good Triplets in an Array	Hard	65.2%	Array Binary Indexed Tree+5	Read
2180. Count Integers With Even Digit Sum	Easy	70.5%	Math Simulation	Read
2181. Merge Nodes in Between Zeros	Medium	89.8%	Linked List Simulation	Read
2182. Construct String With Repeat Limit	Medium	70.9%	Counting Greedy+3	Read
2183. Count Array Pairs Divisible by K	Hard	30.7%	Array Math+1	Read
2184. Number of Ways to Build Sturdy Brick Wall	Medium	49.2%	Array Bit Manipulation+2	Read
2185. Counting Words With a Given Prefix	Easy	84.5%	Array String+1	Read
2186. Minimum Number of Steps to Make Two Strings Anagram II	Medium	72.7%	Counting Hash Table+1	Read
2187. Minimum Time to Complete Trips	Medium	39.6%	Array Binary Search	Read
2188. Minimum Time to Finish the Race	Hard	43.4%	Array Dynamic Programming	Read
2189. Number of Ways to Build House of Cards	Medium	62.7%	Dynamic Programming Math	Read
2190. Most Frequent Number Following Key In an Array	Easy	59.6%	Array Counting+1	Read
2191. Sort the Jumbled Numbers	Medium	60.1%	Array Sorting	Read
2192. All Ancestors of a Node in a Directed Acyclic Graph	Medium	62.1%	Breadth-First Search Depth-First Search+2	Read
2193. Minimum Number of Moves to Make Palindrome	Hard	52.7%	Binary Indexed Tree Greedy+2	Read
2194. Cells in a Range on an Excel Sheet	Easy	83.9%	String	Read
2195. Append K Integers With Minimal Sum	Medium	26.9%	Array Greedy+2	Read
2196. Create Binary Tree From Descriptions	Medium	83.9%	Array Binary Tree+2	Read
2197. Replace Non-Coprime Numbers in Array	Hard	57.7%	Array Math+2	Read
2198. Number of Single Divisor Triplets	Medium	53.1%	Math	Read
2199. Finding the Topic of Each Post	Hard	49.3%	Database	Read
2200. Find All K-Distant Indices in an Array	Easy	77.4%	Array Two Pointers	Read

#2151Hard

Maximum Good People Based on Statements

ArrayBacktrackingBit Manipulation+1

Acceptance: 52.9%

#2152Medium

Minimum Number of Lines to Cover Points

ArrayBacktrackingBit Manipulation+5

Acceptance: 43.9%

#2153Hard

The Number of Passengers in Each Bus II

Database

Acceptance: 39.2%

#2154Easy

Keep Multiplying Found Values by Two

ArrayHash TableSimulation+1

Acceptance: 75.1%

#2155Medium

All Divisions With the Highest Score of a Binary Array

Array

Acceptance: 65.5%

#2156Hard

Find Substring With Given Hash Value

Hash FunctionRolling HashSliding Window+1

Acceptance: 26.7%

#2157Hard

Groups of Strings

Bit ManipulationStringUnion Find

Acceptance: 28.2%

#2158Hard

Amount of New Area Painted Each Day

ArrayOrdered SetSegment Tree

Acceptance: 55.3%

#2159Medium

Order Two Columns Independently

Database

Acceptance: 60.5%

#2160Easy

Minimum Sum of Four Digit Number After Splitting Digits

GreedyMathSorting

Acceptance: 86.2%

#2161Medium

Partition Array According to Given Pivot

ArraySimulationTwo Pointers

Acceptance: 90.8%

#2162Medium

Minimum Cost to Set Cooking Time

EnumerationMath

Acceptance: 45.0%

#2163Hard

Minimum Difference in Sums After Removal of Elements

ArrayDynamic ProgrammingHeap (Priority Queue)

Acceptance: 69.8%

#2164Easy

Sort Even and Odd Indices Independently

ArraySorting

Acceptance: 63.2%

#2165Medium

Smallest Value of the Rearranged Number

MathSorting

Acceptance: 53.5%

#2166Medium

Design Bitset

ArrayDesignHash Table+1

Acceptance: 32.7%

#2167Hard

Minimum Time to Remove All Cars Containing Illegal Goods

Dynamic ProgrammingString

Acceptance: 42.2%

#2168Medium

Unique Substrings With Equal Digit Frequency

CountingHash FunctionHash Table+2

Acceptance: 64.6%

#2169Easy

Count Operations to Obtain Zero

MathSimulation

Acceptance: 79.8%

#2170Medium

Minimum Operations to Make the Array Alternating

ArrayCountingGreedy+1

Acceptance: 35.7%

#2171Medium

Removing Minimum Number of Magic Beans

ArrayEnumerationGreedy+2

Acceptance: 44.5%

#2172Hard

Maximum AND Sum of Array

ArrayBit ManipulationBitmask+1

Acceptance: 50.8%

#2173Hard

Longest Winning Streak

Database

Acceptance: 52.9%

#2174Medium

Remove All Ones With Row and Column Flips II

ArrayBit ManipulationBreadth-First Search+1

Acceptance: 67.2%

#2175Medium

The Change in Global Rankings

Database

Acceptance: 60.1%

#2176Easy

Count Equal and Divisible Pairs in an Array

Array

Acceptance: 84.0%

#2177Medium

Find Three Consecutive Integers That Sum to a Given Number

MathSimulation

Acceptance: 65.3%

#2178Medium

Maximum Split of Positive Even Integers

BacktrackingGreedyMath

Acceptance: 59.9%

#2179Hard

Count Good Triplets in an Array

ArrayBinary Indexed TreeBinary Search+4

Acceptance: 65.2%

#2180Easy

Count Integers With Even Digit Sum

MathSimulation

Acceptance: 70.5%

#2181Medium

Merge Nodes in Between Zeros

Linked ListSimulation

Acceptance: 89.8%

#2182Medium

Construct String With Repeat Limit

CountingGreedyHash Table+2

Acceptance: 70.9%

#2183Hard

Count Array Pairs Divisible by K

ArrayMathNumber Theory

Acceptance: 30.7%

#2184Medium

Number of Ways to Build Sturdy Brick Wall

ArrayBit ManipulationBitmask+1

Acceptance: 49.2%

#2185Easy

Counting Words With a Given Prefix

ArrayStringString Matching

Acceptance: 84.5%

#2186Medium

Minimum Number of Steps to Make Two Strings Anagram II

CountingHash TableString

Acceptance: 72.7%

#2187Medium

Minimum Time to Complete Trips

ArrayBinary Search

Acceptance: 39.6%

#2188Hard

Minimum Time to Finish the Race

ArrayDynamic Programming

Acceptance: 43.4%

#2189Medium

Number of Ways to Build House of Cards

Dynamic ProgrammingMath

Acceptance: 62.7%

#2190Easy

Most Frequent Number Following Key In an Array

ArrayCountingHash Table

Acceptance: 59.6%

#2191Medium

Sort the Jumbled Numbers

ArraySorting

Acceptance: 60.1%

#2192Medium

All Ancestors of a Node in a Directed Acyclic Graph

Breadth-First SearchDepth-First SearchGraph+1

Acceptance: 62.1%

#2193Hard

Minimum Number of Moves to Make Palindrome

Binary Indexed TreeGreedyString+1

Acceptance: 52.7%

#2194Easy

Cells in a Range on an Excel Sheet

String

Acceptance: 83.9%

#2195Medium

Append K Integers With Minimal Sum

ArrayGreedyMath+1

Acceptance: 26.9%

#2196Medium

Create Binary Tree From Descriptions

ArrayBinary TreeHash Table+1

Acceptance: 83.9%

#2197Hard

Replace Non-Coprime Numbers in Array

ArrayMathNumber Theory+1

Acceptance: 57.7%

#2198Medium

Number of Single Divisor Triplets

Math

Acceptance: 53.1%

#2199Hard

Finding the Topic of Each Post

Database

Acceptance: 49.3%

#2200Easy

Find All K-Distant Indices in an Array

ArrayTwo Pointers

Acceptance: 77.4%

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