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
2238. Number of Times a Driver Was a Passenger	Medium	71.5%	Database	Read
2240. Number of Ways to Buy Pens and Pencils	Medium	57.2%	Enumeration Math	Read
2241. Design an ATM Machine	Medium	46.0%	Array Design+1	Read
2244. Minimum Rounds to Complete All Tasks	Medium	62.9%	Array Counting+2	Read
2245. Maximum Trailing Zeros in a Cornered Path	Medium	38.2%	Array Matrix+1	Read
2249. Count Lattice Points Inside a Circle	Medium	57.1%	Array Enumeration+3	Read
2250. Count Number of Rectangles Containing Each Point	Medium	37.5%	Array Binary Indexed Tree+2	Read
2256. Minimum Average Difference	Medium	43.8%	Array Prefix Sum	Read
2257. Count Unguarded Cells in the Grid	Medium	69.0%	Array Matrix+1	Read
2260. Minimum Consecutive Cards to Pick Up	Medium	53.6%	Array Hash Table+1	Read
2261. K Divisible Elements Subarrays	Medium	54.9%	Array Enumeration+4	Read
2265. Count Nodes Equal to Average of Subtree	Medium	88.6%	Binary Tree Depth-First Search+1	Read
2266. Count Number of Texts	Medium	50.6%	Dynamic Programming Hash Table+2	Read
2268. Minimum Number of Keypresses	Medium	71.2%	Counting Greedy+3	Read
2270. Number of Ways to Split Array	Medium	55.9%	Array Prefix Sum	Read
2271. Maximum White Tiles Covered by a Carpet	Medium	36.3%	Array Binary Search+3	Read
2274. Maximum Consecutive Floors Without Special Floors	Medium	52.5%	Array Sorting	Read
2275. Largest Combination With Bitwise AND Greater Than Zero	Medium	81.0%	Array Bit Manipulation+2	Read
2279. Maximum Bags With Full Capacity of Rocks	Medium	68.0%	Array Greedy+1	Read
2280. Minimum Lines to Represent a Line Chart	Medium	26.9%	Array Geometry+3	Read
2282. Number of People That Can Be Seen in a Grid	Medium	46.8%	Array Matrix+2	Read
2284. Sender With Largest Word Count	Medium	60.2%	Array Counting+2	Read
2285. Maximum Total Importance of Roads	Medium	69.3%	Graph Greedy+2	Read
2288. Apply Discount to Prices	Medium	34.5%	String	Read
2289. Steps to Make Array Non-decreasing	Medium	25.3%	Array Linked List+2	Read
2291. Maximum Profit From Trading Stocks	Medium	48.1%	Array Dynamic Programming	Read
2292. Products With Three or More Orders in Two Consecutive Years	Medium	39.7%	Database	Read
2294. Partition Array Such That Maximum Difference Is K	Medium	81.8%	Array Greedy+1	Read
2295. Replace Elements in an Array	Medium	59.7%	Array Hash Table+1	Read
2297. Jump Game VIII	Medium	45.5%	Array Dynamic Programming+4	Read
2298. Tasks Count in the Weekend	Medium	81.7%	Database	Read
2300. Successful Pairs of Spells and Potions	Medium	49.5%	Array Binary Search+2	Read
2304. Minimum Path Cost in a Grid	Medium	68.0%	Array Dynamic Programming+1	Read
2305. Fair Distribution of Cookies	Medium	69.8%	Array Backtracking+3	Read
2308. Arrange Table by Gender	Medium	69.5%	Database	Read
2310. Sum of Numbers With Units Digit K	Medium	28.2%	Dynamic Programming Enumeration+2	Read
2311. Longest Binary Subsequence Less Than or Equal to K	Medium	52.8%	Dynamic Programming Greedy+2	Read
2314. The First Day of the Maximum Recorded Degree in Each City	Medium	72.2%	Database	Read
2316. Count Unreachable Pairs of Nodes in an Undirected Graph	Medium	49.9%	Breadth-First Search Depth-First Search+2	Read
2317. Maximum XOR After Operations	Medium	79.9%	Array Bit Manipulation+1	Read
2320. Count Number of Ways to Place Houses	Medium	43.8%	Dynamic Programming	Read
2323. Find Minimum Time to Finish All Jobs II	Medium	65.8%	Array Greedy+1	Read
2324. Product Sales Analysis IV	Medium	74.7%	Database	Read
2326. Spiral Matrix IV	Medium	82.3%	Array Linked List+2	Read
2327. Number of People Aware of a Secret	Medium	60.9%	Dynamic Programming Queue+1	Read
2330. Valid Palindrome IV	Medium	75.8%	String Two Pointers	Read
2332. The Latest Time to Catch a Bus	Medium	30.0%	Array Binary Search+2	Read
2333. Minimum Sum of Squared Difference	Medium	26.8%	Array Binary Search+3	Read
2336. Smallest Number in Infinite Set	Medium	70.6%	Design Hash Table+2	Read
2337. Move Pieces to Obtain a String	Medium	56.7%	String Two Pointers	Read

#2238Medium

Number of Times a Driver Was a Passenger

Database

Acceptance: 71.5%

#2240Medium

Number of Ways to Buy Pens and Pencils

EnumerationMath

Acceptance: 57.2%

#2241Medium

Design an ATM Machine

ArrayDesignGreedy

Acceptance: 46.0%

#2244Medium

Minimum Rounds to Complete All Tasks

ArrayCountingGreedy+1

Acceptance: 62.9%

#2245Medium

Maximum Trailing Zeros in a Cornered Path

ArrayMatrixPrefix Sum

Acceptance: 38.2%

#2249Medium

Count Lattice Points Inside a Circle

ArrayEnumerationGeometry+2

Acceptance: 57.1%

#2250Medium

Count Number of Rectangles Containing Each Point

ArrayBinary Indexed TreeBinary Search+1

Acceptance: 37.5%

#2256Medium

Minimum Average Difference

ArrayPrefix Sum

Acceptance: 43.8%

#2257Medium

Count Unguarded Cells in the Grid

ArrayMatrixSimulation

Acceptance: 69.0%

#2260Medium

Minimum Consecutive Cards to Pick Up

ArrayHash TableSliding Window

Acceptance: 53.6%

#2261Medium

K Divisible Elements Subarrays

ArrayEnumerationHash Function+3

Acceptance: 54.9%

#2265Medium

Count Nodes Equal to Average of Subtree

Binary TreeDepth-First SearchTree

Acceptance: 88.6%

#2266Medium

Count Number of Texts

Dynamic ProgrammingHash TableMath+1

Acceptance: 50.6%

#2268Medium

Minimum Number of Keypresses

CountingGreedyHash Table+2

Acceptance: 71.2%

#2270Medium

Number of Ways to Split Array

ArrayPrefix Sum

Acceptance: 55.9%

#2271Medium

Maximum White Tiles Covered by a Carpet

ArrayBinary SearchGreedy+2

Acceptance: 36.3%

#2274Medium

Maximum Consecutive Floors Without Special Floors

ArraySorting

Acceptance: 52.5%

#2275Medium

Largest Combination With Bitwise AND Greater Than Zero

ArrayBit ManipulationCounting+1

Acceptance: 81.0%

#2279Medium

Maximum Bags With Full Capacity of Rocks

ArrayGreedySorting

Acceptance: 68.0%

#2280Medium

Minimum Lines to Represent a Line Chart

ArrayGeometryMath+2

Acceptance: 26.9%

#2282Medium

Number of People That Can Be Seen in a Grid

ArrayMatrixMonotonic Stack+1

Acceptance: 46.8%

#2284Medium

Sender With Largest Word Count

ArrayCountingHash Table+1

Acceptance: 60.2%

#2285Medium

Maximum Total Importance of Roads

GraphGreedyHeap (Priority Queue)+1

Acceptance: 69.3%

#2288Medium

Apply Discount to Prices

String

Acceptance: 34.5%

#2289Medium

Steps to Make Array Non-decreasing

ArrayLinked ListMonotonic Stack+1

Acceptance: 25.3%

#2291Medium

Maximum Profit From Trading Stocks

ArrayDynamic Programming

Acceptance: 48.1%

#2292Medium

Products With Three or More Orders in Two Consecutive Years

Database

Acceptance: 39.7%

#2294Medium

Partition Array Such That Maximum Difference Is K

ArrayGreedySorting

Acceptance: 81.8%

#2295Medium

Replace Elements in an Array

ArrayHash TableSimulation

Acceptance: 59.7%

#2297Medium

Jump Game VIII

ArrayDynamic ProgrammingGraph+3

Acceptance: 45.5%

#2298Medium

Tasks Count in the Weekend

Database

Acceptance: 81.7%

#2300Medium

Successful Pairs of Spells and Potions

ArrayBinary SearchSorting+1

Acceptance: 49.5%

#2304Medium

Minimum Path Cost in a Grid

ArrayDynamic ProgrammingMatrix

Acceptance: 68.0%

#2305Medium

Fair Distribution of Cookies

ArrayBacktrackingBit Manipulation+2

Acceptance: 69.8%

#2308Medium

Arrange Table by Gender

Database

Acceptance: 69.5%

#2310Medium

Sum of Numbers With Units Digit K

Dynamic ProgrammingEnumerationGreedy+1

Acceptance: 28.2%

#2311Medium

Longest Binary Subsequence Less Than or Equal to K

Dynamic ProgrammingGreedyMemoization+1

Acceptance: 52.8%

#2314Medium

The First Day of the Maximum Recorded Degree in Each City

Database

Acceptance: 72.2%

#2316Medium

Count Unreachable Pairs of Nodes in an Undirected Graph

Breadth-First SearchDepth-First SearchGraph+1

Acceptance: 49.9%

#2317Medium

Maximum XOR After Operations

ArrayBit ManipulationMath

Acceptance: 79.9%

#2320Medium

Count Number of Ways to Place Houses

Dynamic Programming

Acceptance: 43.8%

#2323Medium

Find Minimum Time to Finish All Jobs II

ArrayGreedySorting

Acceptance: 65.8%

#2324Medium

Product Sales Analysis IV

Database

Acceptance: 74.7%

#2326Medium

Spiral Matrix IV

ArrayLinked ListMatrix+1

Acceptance: 82.3%

#2327Medium

Number of People Aware of a Secret

Dynamic ProgrammingQueueSimulation

Acceptance: 60.9%

#2330Medium

Valid Palindrome IV

StringTwo Pointers

Acceptance: 75.8%

#2332Medium

The Latest Time to Catch a Bus

ArrayBinary SearchSorting+1

Acceptance: 30.0%

#2333Medium

Minimum Sum of Squared Difference

ArrayBinary SearchGreedy+2

Acceptance: 26.8%

#2336Medium

Smallest Number in Infinite Set

DesignHash TableHeap (Priority Queue)+1

Acceptance: 70.6%

#2337Medium

Move Pieces to Obtain a String

StringTwo Pointers

Acceptance: 56.7%

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