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
2302. Count Subarrays With Score Less Than K	Hard	62.3%	Array Binary Search+2	Read
2306. Naming a Company	Hard	46.4%	Array Bit Manipulation+3	Read
2307. Check for Contradictions in Equations	Hard	43.8%	Array Depth-First Search+2	Read
2312. Selling Pieces of Wood	Hard	52.8%	Array Dynamic Programming+1	Read
2313. Minimum Flips in Binary Tree to Get Result	Hard	56.9%	Binary Tree Depth-First Search+2	Read
2318. Number of Distinct Roll Sequences	Hard	58.2%	Dynamic Programming Memoization	Read
2321. Maximum Score Of Spliced Array	Hard	58.9%	Array Dynamic Programming	Read
2322. Minimum Score After Removals on a Tree	Hard	76.2%	Array Bit Manipulation+2	Read
2328. Number of Increasing Paths in a Grid	Hard	57.4%	Array Breadth-First Search+6	Read
2334. Subarray With Elements Greater Than Varying Threshold	Hard	45.9%	Array Monotonic Stack+2	Read
2338. Count the Number of Ideal Arrays	Hard	57.0%	Combinatorics Dynamic Programming+2	Read
2344. Minimum Deletions to Make Array Divisible	Hard	61.8%	Array Heap (Priority Queue)+3	Read
2350. Shortest Impossible Sequence of Rolls	Hard	69.3%	Array Greedy+1	Read
2354. Number of Excellent Pairs	Hard	49.1%	Array Binary Search+2	Read
2355. Maximum Number of Books You Can Take	Hard	40.3%	Array Dynamic Programming+2	Read
2360. Longest Cycle in a Graph	Hard	51.1%	Depth-First Search Graph+1	Read
2361. Minimum Costs Using the Train Line	Hard	77.7%	Array Dynamic Programming	Read
2362. Generate the Invoice	Hard	75.2%	Database	Read
2366. Minimum Replacements to Sort the Array	Hard	53.4%	Array Greedy+1	Read
2371. Minimize Maximum Value in a Grid	Hard	70.1%	Array Graph+4	Read
2376. Count Special Integers	Hard	45.2%	Dynamic Programming Math	Read
2382. Maximum Segment Sum After Removals	Hard	50.1%	Array Ordered Set+2	Read
2386. Find the K-Sum of an Array	Hard	42.0%	Array Heap (Priority Queue)+1	Read
2392. Build a Matrix With Conditions	Hard	79.5%	Array Graph+2	Read
2398. Maximum Number of Robots Within Budget	Hard	38.8%	Array Binary Search+5	Read
2402. Meeting Rooms III	Hard	51.6%	Array Hash Table+3	Read
2403. Minimum Time to Kill All Monsters	Hard	56.3%	Array Bit Manipulation+2	Read
2407. Longest Increasing Subsequence II	Hard	26.1%	Array Binary Indexed Tree+5	Read
2412. Minimum Money Required Before Transactions	Hard	42.1%	Array Greedy+1	Read
2416. Sum of Prefix Scores of Strings	Hard	60.6%	Array Counting+2	Read
2421. Number of Good Paths	Hard	56.7%	Array Graph+4	Read
2426. Number of Pairs Satisfying Inequality	Hard	47.6%	Array Binary Indexed Tree+5	Read
2430. Maximum Deletions on a String	Hard	36.4%	Dynamic Programming Hash Function+3	Read
2435. Paths in Matrix Whose Sum Is Divisible by K	Hard	58.7%	Array Dynamic Programming+1	Read
2440. Create Components With Same Value	Hard	54.0%	Array Depth-First Search+3	Read
2444. Count Subarrays With Fixed Bounds	Hard	69.2%	Array Monotonic Queue+2	Read
2448. Minimum Cost to Make Array Equal	Hard	46.7%	Array Binary Search+3	Read
2449. Minimum Number of Operations to Make Arrays Similar	Hard	61.8%	Array Greedy+1	Read
2454. Next Greater Element IV	Hard	43.0%	Array Binary Search+4	Read
2458. Height of Binary Tree After Subtree Removal Queries	Hard	55.0%	Array Binary Tree+3	Read
2459. Sort Array by Moving Items to Empty Space	Hard	45.7%	Array Greedy+1	Read
2463. Minimum Total Distance Traveled	Hard	63.2%	Array Dynamic Programming+1	Read
2468. Split Message Based on Limit	Hard	42.1%	Binary Search String	Read
2472. Maximum Number of Non-overlapping Palindrome Substrings	Hard	60.9%	Dynamic Programming Greedy+2	Read
2474. Customers With Strictly Increasing Purchases	Hard	45.9%	Database	Read
2478. Number of Beautiful Partitions	Hard	33.5%	Dynamic Programming String	Read
2479. Maximum XOR of Two Non-Overlapping Subtrees	Hard	51.3%	Depth-First Search Graph+2	Read
2484. Count Palindromic Subsequences	Hard	41.7%	Dynamic Programming String	Read
2488. Count Subarrays With Median K	Hard	49.1%	Array Hash Table+1	Read
2493. Divide Nodes Into the Maximum Number of Groups	Hard	67.0%	Breadth-First Search Graph+1	Read

#2302Hard

Count Subarrays With Score Less Than K

ArrayBinary SearchPrefix Sum+1

Acceptance: 62.3%

#2306Hard

Naming a Company

ArrayBit ManipulationEnumeration+2

Acceptance: 46.4%

#2307Hard

Check for Contradictions in Equations

ArrayDepth-First SearchGraph+1

Acceptance: 43.8%

#2312Hard

Selling Pieces of Wood

ArrayDynamic ProgrammingMemoization

Acceptance: 52.8%

#2313Hard

Minimum Flips in Binary Tree to Get Result

Binary TreeDepth-First SearchDynamic Programming+1

Acceptance: 56.9%

#2318Hard

Number of Distinct Roll Sequences

Dynamic ProgrammingMemoization

Acceptance: 58.2%

#2321Hard

Maximum Score Of Spliced Array

ArrayDynamic Programming

Acceptance: 58.9%

#2322Hard

Minimum Score After Removals on a Tree

ArrayBit ManipulationDepth-First Search+1

Acceptance: 76.2%

#2328Hard

Number of Increasing Paths in a Grid

ArrayBreadth-First SearchDepth-First Search+5

Acceptance: 57.4%

#2334Hard

Subarray With Elements Greater Than Varying Threshold

ArrayMonotonic StackStack+1

Acceptance: 45.9%

#2338Hard

Count the Number of Ideal Arrays

CombinatoricsDynamic ProgrammingMath+1

Acceptance: 57.0%

#2344Hard

Minimum Deletions to Make Array Divisible

ArrayHeap (Priority Queue)Math+2

Acceptance: 61.8%

#2350Hard

Shortest Impossible Sequence of Rolls

ArrayGreedyHash Table

Acceptance: 69.3%

#2354Hard

Number of Excellent Pairs

ArrayBinary SearchBit Manipulation+1

Acceptance: 49.1%

#2355Hard

Maximum Number of Books You Can Take

ArrayDynamic ProgrammingMonotonic Stack+1

Acceptance: 40.3%

#2360Hard

Longest Cycle in a Graph

Depth-First SearchGraphTopological Sort

Acceptance: 51.1%

#2361Hard

Minimum Costs Using the Train Line

ArrayDynamic Programming

Acceptance: 77.7%

#2362Hard

Generate the Invoice

Database

Acceptance: 75.2%

#2366Hard

Minimum Replacements to Sort the Array

ArrayGreedyMath

Acceptance: 53.4%

#2371Hard

Minimize Maximum Value in a Grid

ArrayGraphMatrix+3

Acceptance: 70.1%

#2376Hard

Count Special Integers

Dynamic ProgrammingMath

Acceptance: 45.2%

#2382Hard

Maximum Segment Sum After Removals

ArrayOrdered SetPrefix Sum+1

Acceptance: 50.1%

#2386Hard

Find the K-Sum of an Array

ArrayHeap (Priority Queue)Sorting

Acceptance: 42.0%

#2392Hard

Build a Matrix With Conditions

ArrayGraphMatrix+1

Acceptance: 79.5%

#2398Hard

Maximum Number of Robots Within Budget

ArrayBinary SearchHeap (Priority Queue)+4

Acceptance: 38.8%

#2402Hard

Meeting Rooms III

ArrayHash TableHeap (Priority Queue)+2

Acceptance: 51.6%

#2403Hard

Minimum Time to Kill All Monsters

ArrayBit ManipulationBitmask+1

Acceptance: 56.3%

#2407Hard

Longest Increasing Subsequence II

ArrayBinary Indexed TreeDivide and Conquer+4

Acceptance: 26.1%

#2412Hard

Minimum Money Required Before Transactions

ArrayGreedySorting

Acceptance: 42.1%

#2416Hard

Sum of Prefix Scores of Strings

ArrayCountingString+1

Acceptance: 60.6%

#2421Hard

Number of Good Paths

ArrayGraphHash Table+3

Acceptance: 56.7%

#2426Hard

Number of Pairs Satisfying Inequality

ArrayBinary Indexed TreeBinary Search+4

Acceptance: 47.6%

#2430Hard

Maximum Deletions on a String

Dynamic ProgrammingHash FunctionRolling Hash+2

Acceptance: 36.4%

#2435Hard

Paths in Matrix Whose Sum Is Divisible by K

ArrayDynamic ProgrammingMatrix

Acceptance: 58.7%

#2440Hard

Create Components With Same Value

ArrayDepth-First SearchEnumeration+2

Acceptance: 54.0%

#2444Hard

Count Subarrays With Fixed Bounds

ArrayMonotonic QueueQueue+1

Acceptance: 69.2%

#2448Hard

Minimum Cost to Make Array Equal

ArrayBinary SearchGreedy+2

Acceptance: 46.7%

#2449Hard

Minimum Number of Operations to Make Arrays Similar

ArrayGreedySorting

Acceptance: 61.8%

#2454Hard

Next Greater Element IV

ArrayBinary SearchHeap (Priority Queue)+3

Acceptance: 43.0%

#2458Hard

Height of Binary Tree After Subtree Removal Queries

ArrayBinary TreeBreadth-First Search+2

Acceptance: 55.0%

#2459Hard

Sort Array by Moving Items to Empty Space

ArrayGreedySorting

Acceptance: 45.7%

#2463Hard

Minimum Total Distance Traveled

ArrayDynamic ProgrammingSorting

Acceptance: 63.2%

#2468Hard

Split Message Based on Limit

Binary SearchString

Acceptance: 42.1%

#2472Hard

Maximum Number of Non-overlapping Palindrome Substrings

Dynamic ProgrammingGreedyString+1

Acceptance: 60.9%

#2474Hard

Customers With Strictly Increasing Purchases

Database

Acceptance: 45.9%

#2478Hard

Number of Beautiful Partitions

Dynamic ProgrammingString

Acceptance: 33.5%

#2479Hard

Maximum XOR of Two Non-Overlapping Subtrees

Depth-First SearchGraphTree+1

Acceptance: 51.3%

#2484Hard

Count Palindromic Subsequences

Dynamic ProgrammingString

Acceptance: 41.7%

#2488Hard

Count Subarrays With Median K

ArrayHash TablePrefix Sum

Acceptance: 49.1%

#2493Hard

Divide Nodes Into the Maximum Number of Groups

Breadth-First SearchGraphUnion Find

Acceptance: 67.0%

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