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
3644. Maximum K to Sort a Permutation	Medium	37.3%	Array Bit Manipulation	Read
3610. Minimum Number of Primes to Sum to Target	Medium	59.8%	Array Dynamic Programming+2	Read
3628. Maximum Number of Subsequences After One Inserting	Medium	32.4%	Dynamic Programming Greedy+2	Read
3669. Balanced K-Factor Decomposition	Medium	40.2%	Backtracking Math+1	Read
3755. Find Maximum Balanced XOR Subarray Length	Medium	50.8%	Array Bit Manipulation+2	Read
3648. Minimum Sensors to Cover Grid	Medium	67.6%	Math	Read
3639. Minimum Time to Activate String	Medium	48.6%	Array Binary Search	Read
3624. Number of Integers With Popcount-Depth Equal to K II	Hard	58.5%	Array Binary Indexed Tree+2	Read
3614. Process String with Special Operations II	Hard	39.9%	Simulation String	Read
3665. Twisted Mirror Path Count	Medium	47.5%	Array Dynamic Programming+1	Read
3621. Number of Integers With Popcount-Depth Equal to K I	Hard	23.0%	Bit Manipulation Combinatorics+2	Read
3618. Split Array by Prime Indices	Medium	49.3%	Array Math+1	Read
3595. Once Twice	Medium	76.1%	Array Bit Manipulation	Read
3606. Coupon Code Validator	Easy	64.4%	Array Hash Table+2	Read
3629. Minimum Jumps to Reach End via Prime Teleportation	Medium	44.6%	Array Breadth-First Search+3	Read
3612. Process String with Special Operations I	Medium	71.4%	Simulation String	Read
3615. Longest Palindromic Path in Graph	Hard	22.6%	Bit Manipulation Bitmask+3	Read
3632. Subarrays with XOR at Least K	Hard	45.7%	Array Bit Manipulation+2	Read
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
3581. Count Odd Letters from Number	Easy	85.1%	Counting Hash Table+2	Read
3609. Minimum Moves to Reach Target in Grid	Hard	15.5%	Math	Read
3605. Minimum Stability Factor of Array	Hard	20.4%	Array Binary Search+4	Read
3620. Network Recovery Pathways	Hard	50.8%	Array Binary Search+5	Read
3622. Check Divisibility by Digit Sum and Product	Easy	74.5%	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
3591. Check if Any Element Has Prime Frequency	Easy	62.6%	Array Counting+3	Read
3599. Partition Array to Minimize XOR	Medium	41.2%	Array Bit Manipulation+2	Read
3602. Hexadecimal and Hexatrigesimal Conversion	Easy	79.4%	Math String	Read
3571. Find the Shortest Superstring II	Easy	48.8%	String	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
3590. Kth Smallest Path XOR Sum	Hard	29.5%	Array Depth-First Search+2	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
3600. Maximize Spanning Tree Stability with Upgrades	Hard	65.9%	Binary Search Graph+3	Read
3585. Find Weighted Median Node in Tree	Hard	26.7%	Array Binary Search+4	Read
3565. Sequential Grid Path Cover	Medium	60.2%	Array Matrix+1	Read
3625. Count Number of Trapezoids II	Hard	40.0%	Array Geometry+2	Read
3594. Minimum Time to Transport All Individuals	Hard	28.3%	Array Bit Manipulation+4	Read
3572. Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values	Medium	62.7%	Array Greedy+3	Read
3582. Generate Tag for Video Caption	Easy	32.4%	Simulation String	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
3651. Minimum Cost Path with Teleportations	Hard	45.1%	Array Dynamic Programming+1	Read
3574. Maximize Subarray GCD Score	Hard	25.5%	Array Enumeration+2	Read

#3644Medium

Maximum K to Sort a Permutation

ArrayBit Manipulation

Acceptance: 37.3%

#3610Medium

Minimum Number of Primes to Sum to Target

ArrayDynamic ProgrammingMath+1

Acceptance: 59.8%

#3628Medium

Maximum Number of Subsequences After One Inserting

Dynamic ProgrammingGreedyPrefix Sum+1

Acceptance: 32.4%

#3669Medium

Balanced K-Factor Decomposition

BacktrackingMathNumber Theory

Acceptance: 40.2%

#3755Medium

Find Maximum Balanced XOR Subarray Length

ArrayBit ManipulationHash Table+1

Acceptance: 50.8%

#3648Medium

Minimum Sensors to Cover Grid

Math

Acceptance: 67.6%

#3639Medium

Minimum Time to Activate String

ArrayBinary Search

Acceptance: 48.6%

#3624Hard

Number of Integers With Popcount-Depth Equal to K II

ArrayBinary Indexed TreeDivide and Conquer+1

Acceptance: 58.5%

#3614Hard

Process String with Special Operations II

SimulationString

Acceptance: 39.9%

#3665Medium

Twisted Mirror Path Count

ArrayDynamic ProgrammingMatrix

Acceptance: 47.5%

#3621Hard

Number of Integers With Popcount-Depth Equal to K I

Bit ManipulationCombinatoricsDynamic Programming+1

Acceptance: 23.0%

#3618Medium

Split Array by Prime Indices

ArrayMathNumber Theory

Acceptance: 49.3%

#3595Medium

Once Twice

ArrayBit Manipulation

Acceptance: 76.1%

#3606Easy

Coupon Code Validator

ArrayHash TableSorting+1

Acceptance: 64.4%

#3629Medium

Minimum Jumps to Reach End via Prime Teleportation

ArrayBreadth-First SearchHash Table+2

Acceptance: 44.6%

#3612Medium

Process String with Special Operations I

SimulationString

Acceptance: 71.4%

#3615Hard

Longest Palindromic Path in Graph

Bit ManipulationBitmaskDynamic Programming+2

Acceptance: 22.6%

#3632Hard

Subarrays with XOR at Least K

ArrayBit ManipulationPrefix Sum+1

Acceptance: 45.7%

#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%

#3581Easy

Count Odd Letters from Number

CountingHash TableSimulation+1

Acceptance: 85.1%

#3609Hard

Minimum Moves to Reach Target in Grid

Math

Acceptance: 15.5%

#3605Hard

Minimum Stability Factor of Array

ArrayBinary SearchGreedy+3

Acceptance: 20.4%

#3620Hard

Network Recovery Pathways

ArrayBinary SearchDynamic Programming+4

Acceptance: 50.8%

#3622Easy

Check Divisibility by Digit Sum and Product

Math

Acceptance: 74.5%

#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%

#3591Easy

Check if Any Element Has Prime Frequency

ArrayCountingHash Table+2

Acceptance: 62.6%

#3599Medium

Partition Array to Minimize XOR

ArrayBit ManipulationDynamic Programming+1

Acceptance: 41.2%

#3602Easy

Hexadecimal and Hexatrigesimal Conversion

MathString

Acceptance: 79.4%

#3571Easy

Find the Shortest Superstring II

String

Acceptance: 48.8%

#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%

#3590Hard

Kth Smallest Path XOR Sum

ArrayDepth-First SearchOrdered Set+1

Acceptance: 29.5%

#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%

#3600Hard

Maximize Spanning Tree Stability with Upgrades

Binary SearchGraphGreedy+2

Acceptance: 65.9%

#3585Hard

Find Weighted Median Node in Tree

ArrayBinary SearchBit Manipulation+3

Acceptance: 26.7%

#3565Medium

Sequential Grid Path Cover

ArrayMatrixRecursion

Acceptance: 60.2%

#3625Hard

Count Number of Trapezoids II

ArrayGeometryHash Table+1

Acceptance: 40.0%

#3594Hard

Minimum Time to Transport All Individuals

ArrayBit ManipulationBitmask+3

Acceptance: 28.3%

#3572Medium

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

ArrayGreedyHash Table+2

Acceptance: 62.7%

#3582Easy

Generate Tag for Video Caption

SimulationString

Acceptance: 32.4%

#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%

#3651Hard

Minimum Cost Path with Teleportations

ArrayDynamic ProgrammingMatrix

Acceptance: 45.1%

#3574Hard

Maximize Subarray GCD Score

ArrayEnumerationMath+1

Acceptance: 25.5%

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