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
3690. Split and Merge Array Transformation	Medium	58.7%	Array Breadth-First Search+1	Read
3603. Minimum Cost Path with Alternating Directions II	Medium	44.6%	Array Dynamic Programming+1	Read
3596. Minimum Cost Path with Alternating Directions I	Medium	71.3%	Brainteaser Math	Read
3604. Minimum Time to Reach Destination in Directed Graph	Medium	45.5%	Graph Heap (Priority Queue)+1	Read
3670. Maximum Product of Two Integers With No Common Bits	Medium	15.1%	Array Bit Manipulation+1	Read
3599. Partition Array to Minimize XOR	Medium	41.2%	Array Bit Manipulation+2	Read
3593. Minimum Increments to Equalize Leaf Paths	Medium	41.2%	Array Depth-First Search+2	Read
3608. Minimum Time for K Connected Components	Medium	45.2%	Binary Search Graph+2	Read
3589. Count Prime-Gap Balanced Subarrays	Medium	23.7%	Array Math+4	Read
3597. Partition String	Medium	59.4%	Hash Table Simulation+2	Read
3587. Minimum Adjacent Swaps to Alternate Parity	Medium	42.3%	Array Greedy	Read
3592. Inverse Coin Change	Medium	52.2%	Array Dynamic Programming	Read
3565. Sequential Grid Path Cover	Medium	60.2%	Array Matrix+1	Read
3572. Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values	Medium	62.7%	Array Greedy+3	Read
3573. Best Time to Buy and Sell Stock V	Medium	60.1%	Array Dynamic Programming	Read
3555. Smallest Subarray to Sort in Every Sliding Window	Medium	58.8%	Array Greedy+4	Read
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
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
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
3685. Subsequence Sum After Capping Elements	Medium	25.2%	Array Dynamic Programming+2	Read
3568. Minimum Moves to Clean the Classroom	Medium	58.7%	Array Bit Manipulation+3	Read
3588. Find Maximum Area of a Triangle	Medium	29.8%	Array Enumeration+4	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
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
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
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
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
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
3578. Count Partitions With Max-Min Difference at Most K	Medium	58.2%	Array Dynamic Programming+4	Read
3542. Minimum Operations to Convert All Elements to Zero	Medium	53.0%	Array Greedy+3	Read
3524. Find X Value of Array I	Medium	66.5%	Array Dynamic Programming+1	Read
3508. Implement Router	Medium	39.1%	Array Binary Search+4	Read
3481. Apply Substitutions	Medium	78.0%	Array Breadth-First Search+5	Read
3513. Number of Unique XOR Triplets I	Medium	57.2%	Array Bit Manipulation+1	Read
3619. Count Islands With Total Value Divisible by K	Medium	55.5%	Array Breadth-First Search+3	Read
3537. Fill a Special Grid	Medium	70.8%	Array Divide and Conquer+1	Read
3529. Count Cells in Overlapping Horizontal and Vertical Substrings	Medium	27.7%	Array Hash Function+4	Read

#3690Medium

Split and Merge Array Transformation

ArrayBreadth-First SearchHash Table

Acceptance: 58.7%

#3603Medium

Minimum Cost Path with Alternating Directions II

ArrayDynamic ProgrammingMatrix

Acceptance: 44.6%

#3596Medium

Minimum Cost Path with Alternating Directions I

BrainteaserMath

Acceptance: 71.3%

#3604Medium

Minimum Time to Reach Destination in Directed Graph

GraphHeap (Priority Queue)Shortest Path

Acceptance: 45.5%

#3670Medium

Maximum Product of Two Integers With No Common Bits

ArrayBit ManipulationDynamic Programming

Acceptance: 15.1%

#3599Medium

Partition Array to Minimize XOR

ArrayBit ManipulationDynamic Programming+1

Acceptance: 41.2%

#3593Medium

Minimum Increments to Equalize Leaf Paths

ArrayDepth-First SearchDynamic Programming+1

Acceptance: 41.2%

#3608Medium

Minimum Time for K Connected Components

Binary SearchGraphSorting+1

Acceptance: 45.2%

#3589Medium

Count Prime-Gap Balanced Subarrays

ArrayMathMonotonic Queue+3

Acceptance: 23.7%

#3597Medium

Partition String

Hash TableSimulationString+1

Acceptance: 59.4%

#3587Medium

Minimum Adjacent Swaps to Alternate Parity

ArrayGreedy

Acceptance: 42.3%

#3592Medium

Inverse Coin Change

ArrayDynamic Programming

Acceptance: 52.2%

#3565Medium

Sequential Grid Path Cover

ArrayMatrixRecursion

Acceptance: 60.2%

#3572Medium

Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values

ArrayGreedyHash Table+2

Acceptance: 62.7%

#3573Medium

Best Time to Buy and Sell Stock V

ArrayDynamic Programming

Acceptance: 60.1%

#3555Medium

Smallest Subarray to Sort in Every Sliding Window

ArrayGreedyMonotonic Stack+3

Acceptance: 58.8%

#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%

#3613Medium

Minimize Maximum Component Cost

Binary SearchGraphSorting+1

Acceptance: 43.5%

#3540Medium

Minimum Time to Visit All Houses

ArrayPrefix Sum

Acceptance: 69.3%

#3664Medium

Two-Letter Card Game

ArrayCountingEnumeration+2

Acceptance: 13.0%

#3576Medium

Transform Array to All Equal Elements

ArrayGreedy

Acceptance: 33.1%

#3685Medium

Subsequence Sum After Capping Elements

ArrayDynamic ProgrammingSorting+1

Acceptance: 25.2%

#3568Medium

Minimum Moves to Clean the Classroom

ArrayBit ManipulationBreadth-First Search+2

Acceptance: 58.7%

#3588Medium

Find Maximum Area of a Triangle

ArrayEnumerationGeometry+3

Acceptance: 29.8%

#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%

#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%

#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%

#3546Medium

Equal Sum Grid Partition I

ArrayEnumerationMatrix+1

Acceptance: 52.9%

#3551Medium

Minimum Swaps to Sort by Digit Sum

ArrayHash TableSorting

Acceptance: 50.5%

#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%

#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%

#3578Medium

Count Partitions With Max-Min Difference at Most K

ArrayDynamic ProgrammingMonotonic Queue+3

Acceptance: 58.2%

#3542Medium

Minimum Operations to Convert All Elements to Zero

ArrayGreedyHash Table+2

Acceptance: 53.0%

#3524Medium

Find X Value of Array I

ArrayDynamic ProgrammingMath

Acceptance: 66.5%

#3508Medium

Implement Router

ArrayBinary SearchDesign+3

Acceptance: 39.1%

#3481Medium

Apply Substitutions

ArrayBreadth-First SearchDepth-First Search+4

Acceptance: 78.0%

#3513Medium

Number of Unique XOR Triplets I

ArrayBit ManipulationMath

Acceptance: 57.2%

#3619Medium

Count Islands With Total Value Divisible by K

ArrayBreadth-First SearchDepth-First Search+2

Acceptance: 55.5%

#3537Medium

Fill a Special Grid

ArrayDivide and ConquerMatrix

Acceptance: 70.8%

#3529Medium

Count Cells in Overlapping Horizontal and Vertical Substrings

ArrayHash FunctionMatrix+3

Acceptance: 27.7%

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