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
3650. Minimum Cost Path with Edge Reversals	Medium	61.8%	Graph Heap (Priority Queue)+1	Read
3623. Count Number of Trapezoids I	Medium	48.1%	Array Geometry+2	Read
3583. Count Special Triplets	Medium	47.1%	Array Counting+1	Read
3567. Minimum Absolute Difference in Sliding Submatrix	Medium	78.3%	Array Matrix+1	Read
3549. Multiply Two Polynomials	Hard	59.2%	Array Math	Read
3630. Partition Array for Maximum XOR and AND	Hard	17.6%	Array Bit Manipulation+3	Read
3613. Minimize Maximum Component Cost	Medium	43.5%	Binary Search Graph+2	Read
3540. Minimum Time to Visit All Houses	Medium	69.3%	Array Prefix Sum	Read
3560. Find Minimum Log Transportation Cost	Easy	42.2%	Math	Read
3569. Maximize Count of Distinct Primes After Split	Hard	19.0%	Array Math+2	Read
3664. Two-Letter Card Game	Medium	13.0%	Array Counting+3	Read
3576. Transform Array to All Equal Elements	Medium	33.1%	Array Greedy	Read
3575. Maximum Good Subtree Score	Hard	44.0%	Array Bit Manipulation+4	Read
3685. Subsequence Sum After Capping Elements	Medium	25.2%	Array Dynamic Programming+2	Read
3541. Find Most Frequent Vowel and Consonant	Easy	89.4%	Counting Hash Table+1	Read
3545. Minimum Deletions for At Most K Distinct Characters	Easy	72.2%	Counting Greedy+3	Read
3568. Minimum Moves to Clean the Classroom	Medium	58.7%	Array Bit Manipulation+3	Read
3550. Smallest Index With Digit Sum Equal to Index	Easy	79.5%	Array Math	Read
3588. Find Maximum Area of a Triangle	Medium	29.8%	Array Enumeration+4	Read
3563. Lexicographically Smallest String After Adjacent Removals	Hard	17.9%	Dynamic Programming String	Read
3579. Minimum Steps to Convert String with Operations	Hard	41.9%	Dynamic Programming String	Read
3577. Count the Number of Computer Unlocking Permutations	Medium	59.0%	Array Brainteaser+2	Read
3607. Power Grid Maintenance	Medium	56.3%	Array Breadth-First Search+6	Read
3526. Range XOR Queries with Subarray Reversals	Hard	62.4%	Array Binary Tree+1	Read
3520. Minimum Threshold for Inversion Pairs Count	Medium	56.3%	Array Binary Indexed Tree+2	Read
3561. Resulting String After Adjacent Removals	Medium	56.5%	Simulation Stack+1	Read
3536. Maximum Product of Two Digits	Easy	75.7%	Math Sorting	Read
3544. Subtree Inversion Sum	Hard	41.6%	Array Depth-First Search+2	Read
3557. Find Maximum Number of Non Intersecting Substrings	Medium	31.1%	Dynamic Programming Greedy+2	Read
3543. Maximum Weighted K-Edge Path	Medium	20.5%	Dynamic Programming Graph+1	Read
3511. Make a Positive Array	Medium	36.9%	Array Greedy+1	Read
3562. Maximum Profit from Trading Stocks with Discounts	Hard	56.1%	Array Depth-First Search+2	Read
3553. Minimum Weighted Subgraph With the Required Paths II	Hard	47.6%	Array Bit Manipulation+3	Read
3534. Path Existence Queries in a Graph II	Hard	64.2%	Array Binary Search+6	Read
3539. Find Sum of Array Product of Magical Sequences	Hard	61.9%	Array Bit Manipulation+4	Read
3548. Equal Sum Grid Partition II	Hard	39.5%	Array Enumeration+3	Read
3546. Equal Sum Grid Partition I	Medium	52.9%	Array Enumeration+2	Read
3551. Minimum Swaps to Sort by Digit Sum	Medium	50.5%	Array Hash Table+1	Read
3512. Minimum Operations to Make Array Sum Divisible by K	Easy	92.4%	Array Math	Read
3547. Maximum Sum of Edge Values in a Graph	Hard	37.6%	Graph Greedy+1	Read
3558. Number of Ways to Assign Edge Weights I	Medium	63.7%	Depth-First Search Math+1	Read
3566. Partition Array into Two Equal Product Subsets	Medium	35.1%	Array Bit Manipulation+2	Read
3559. Number of Ways to Assign Edge Weights II	Hard	71.8%	Array Bit Manipulation+4	Read
3533. Concatenated Divisibility	Hard	30.6%	Array Bit Manipulation+2	Read
3525. Find X Value of Array II	Hard	45.5%	Array Math+1	Read
3496. Maximize Score After Pair Deletions	Medium	52.5%	Array Greedy	Read
3532. Path Existence Queries in a Graph I	Medium	70.6%	Array Binary Search+3	Read
3552. Grid Teleportation Traversal	Medium	24.0%	Array Breadth-First Search+2	Read
3491. Phone Number Prefix	Easy	69.9%	Array Sorting+2	Read
3578. Count Partitions With Max-Min Difference at Most K	Medium	58.2%	Array Dynamic Programming+4	Read

#3650Medium

Minimum Cost Path with Edge Reversals

GraphHeap (Priority Queue)Shortest Path

Acceptance: 61.8%

#3623Medium

Count Number of Trapezoids I

ArrayGeometryHash Table+1

Acceptance: 48.1%

#3583Medium

Count Special Triplets

ArrayCountingHash Table

Acceptance: 47.1%

#3567Medium

Minimum Absolute Difference in Sliding Submatrix

ArrayMatrixSorting

Acceptance: 78.3%

#3549Hard

Multiply Two Polynomials

ArrayMath

Acceptance: 59.2%

#3630Hard

Partition Array for Maximum XOR and AND

ArrayBit ManipulationEnumeration+2

Acceptance: 17.6%

#3613Medium

Minimize Maximum Component Cost

Binary SearchGraphSorting+1

Acceptance: 43.5%

#3540Medium

Minimum Time to Visit All Houses

ArrayPrefix Sum

Acceptance: 69.3%

#3560Easy

Find Minimum Log Transportation Cost

Math

Acceptance: 42.2%

#3569Hard

Maximize Count of Distinct Primes After Split

ArrayMathNumber Theory+1

Acceptance: 19.0%

#3664Medium

Two-Letter Card Game

ArrayCountingEnumeration+2

Acceptance: 13.0%

#3576Medium

Transform Array to All Equal Elements

ArrayGreedy

Acceptance: 33.1%

#3575Hard

Maximum Good Subtree Score

ArrayBit ManipulationBitmask+3

Acceptance: 44.0%

#3685Medium

Subsequence Sum After Capping Elements

ArrayDynamic ProgrammingSorting+1

Acceptance: 25.2%

#3541Easy

Find Most Frequent Vowel and Consonant

CountingHash TableString

Acceptance: 89.4%

#3545Easy

Minimum Deletions for At Most K Distinct Characters

CountingGreedyHash Table+2

Acceptance: 72.2%

#3568Medium

Minimum Moves to Clean the Classroom

ArrayBit ManipulationBreadth-First Search+2

Acceptance: 58.7%

#3550Easy

Smallest Index With Digit Sum Equal to Index

ArrayMath

Acceptance: 79.5%

#3588Medium

Find Maximum Area of a Triangle

ArrayEnumerationGeometry+3

Acceptance: 29.8%

#3563Hard

Lexicographically Smallest String After Adjacent Removals

Dynamic ProgrammingString

Acceptance: 17.9%

#3579Hard

Minimum Steps to Convert String with Operations

Dynamic ProgrammingString

Acceptance: 41.9%

#3577Medium

Count the Number of Computer Unlocking Permutations

ArrayBrainteaserCombinatorics+1

Acceptance: 59.0%

#3607Medium

Power Grid Maintenance

ArrayBreadth-First SearchDepth-First Search+5

Acceptance: 56.3%

#3526Hard

Range XOR Queries with Subarray Reversals

ArrayBinary TreeTree

Acceptance: 62.4%

#3520Medium

Minimum Threshold for Inversion Pairs Count

ArrayBinary Indexed TreeBinary Search+1

Acceptance: 56.3%

#3561Medium

Resulting String After Adjacent Removals

SimulationStackString

Acceptance: 56.5%

#3536Easy

Maximum Product of Two Digits

MathSorting

Acceptance: 75.7%

#3544Hard

Subtree Inversion Sum

ArrayDepth-First SearchDynamic Programming+1

Acceptance: 41.6%

#3557Medium

Find Maximum Number of Non Intersecting Substrings

Dynamic ProgrammingGreedyHash Table+1

Acceptance: 31.1%

#3543Medium

Maximum Weighted K-Edge Path

Dynamic ProgrammingGraphHash Table

Acceptance: 20.5%

#3511Medium

Make a Positive Array

ArrayGreedyPrefix Sum

Acceptance: 36.9%

#3562Hard

Maximum Profit from Trading Stocks with Discounts

ArrayDepth-First SearchDynamic Programming+1

Acceptance: 56.1%

#3553Hard

Minimum Weighted Subgraph With the Required Paths II

ArrayBit ManipulationDepth-First Search+2

Acceptance: 47.6%

#3534Hard

Path Existence Queries in a Graph II

ArrayBinary SearchBit Manipulation+5

Acceptance: 64.2%

#3539Hard

Find Sum of Array Product of Magical Sequences

ArrayBit ManipulationBitmask+3

Acceptance: 61.9%

#3548Hard

Equal Sum Grid Partition II

ArrayEnumerationHash Table+2

Acceptance: 39.5%

#3546Medium

Equal Sum Grid Partition I

ArrayEnumerationMatrix+1

Acceptance: 52.9%

#3551Medium

Minimum Swaps to Sort by Digit Sum

ArrayHash TableSorting

Acceptance: 50.5%

#3512Easy

Minimum Operations to Make Array Sum Divisible by K

ArrayMath

Acceptance: 92.4%

#3547Hard

Maximum Sum of Edge Values in a Graph

GraphGreedyMath

Acceptance: 37.6%

#3558Medium

Number of Ways to Assign Edge Weights I

Depth-First SearchMathTree

Acceptance: 63.7%

#3566Medium

Partition Array into Two Equal Product Subsets

ArrayBit ManipulationEnumeration+1

Acceptance: 35.1%

#3559Hard

Number of Ways to Assign Edge Weights II

ArrayBit ManipulationDepth-First Search+3

Acceptance: 71.8%

#3533Hard

Concatenated Divisibility

ArrayBit ManipulationBitmask+1

Acceptance: 30.6%

#3525Hard

Find X Value of Array II

ArrayMathSegment Tree

Acceptance: 45.5%

#3496Medium

Maximize Score After Pair Deletions

ArrayGreedy

Acceptance: 52.5%

#3532Medium

Path Existence Queries in a Graph I

ArrayBinary SearchGraph+2

Acceptance: 70.6%

#3552Medium

Grid Teleportation Traversal

ArrayBreadth-First SearchHash Table+1

Acceptance: 24.0%

#3491Easy

Phone Number Prefix

ArraySortingString+1

Acceptance: 69.9%

#3578Medium

Count Partitions With Max-Min Difference at Most K

ArrayDynamic ProgrammingMonotonic Queue+3

Acceptance: 58.2%

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