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
751. IP to CIDR	Medium	53.7%	Bit Manipulation String	Read
752. Open the Lock	Medium	61.2%	Array Breadth-First Search+2	Read
753. Cracking the Safe	Hard	58.5%	Depth-First Search Eulerian Circuit+1	Read
754. Reach a Number	Medium	45.5%	Binary Search Math	Read
755. Pour Water	Medium	49.1%	Array Simulation	Read
756. Pyramid Transition Matrix	Medium	60.6%	Bit Manipulation Breadth-First Search+1	Read
757. Set Intersection Size At Least Two	Hard	58.0%	Array Greedy+1	Read
758. Bold Words in String	Medium	53.2%	Array Hash Table+3	Read
759. Employee Free Time	Hard	72.9%	Array Heap (Priority Queue)+1	Read
760. Find Anagram Mappings	Easy	83.8%	Array Hash Table	Read
761. Special Binary String	Hard	79.4%	Recursion String	Read
762. Prime Number of Set Bits in Binary Representation	Easy	78.7%	Bit Manipulation Math	Read
763. Partition Labels	Medium	81.8%	Greedy Hash Table+2	Read
764. Largest Plus Sign	Medium	49.1%	Array Dynamic Programming	Read
765. Couples Holding Hands	Hard	59.8%	Breadth-First Search Depth-First Search+3	Read
766. Toeplitz Matrix	Easy	69.8%	Array Matrix	Read
767. Reorganize String	Medium	57.5%	Counting Greedy+4	Read
768. Max Chunks To Make Sorted II	Hard	54.7%	Array Greedy+3	Read
769. Max Chunks To Make Sorted	Medium	64.1%	Array Greedy+3	Read
770. Basic Calculator IV	Hard	49.8%	Hash Table Math+3	Read
771. Jewels and Stones	Easy	89.5%	Hash Table String	Read
772. Basic Calculator III	Hard	53.2%	Math Recursion+2	Read
773. Sliding Puzzle	Hard	74.3%	Array Backtracking+4	Read
774. Minimize Max Distance to Gas Station	Hard	53.9%	Array Binary Search	Read
775. Global and Local Inversions	Medium	42.9%	Array Math	Read
776. Split BST	Medium	82.5%	Binary Search Tree Binary Tree+2	Read
777. Swap Adjacent in LR String	Medium	37.9%	String Two Pointers	Read
778. Swim in Rising Water	Hard	68.3%	Array Binary Search+5	Read
779. K-th Symbol in Grammar	Medium	48.7%	Bit Manipulation Math+1	Read
780. Reaching Points	Hard	34.3%	Math	Read
781. Rabbits in Forest	Medium	58.0%	Array Greedy+2	Read
782. Transform to Chessboard	Hard	51.3%	Array Bit Manipulation+2	Read
783. Minimum Distance Between BST Nodes	Easy	61.8%	Binary Search Tree Binary Tree+3	Read
784. Letter Case Permutation	Medium	75.7%	Backtracking Bit Manipulation+1	Read
785. Is Graph Bipartite?	Medium	59.6%	Breadth-First Search Depth-First Search+2	Read
786. K-th Smallest Prime Fraction	Medium	69.0%	Array Binary Search+3	Read
787. Cheapest Flights Within K Stops	Medium	42.1%	Breadth-First Search Depth-First Search+4	Read
788. Rotated Digits	Medium	63.9%	Dynamic Programming Math	Read
789. Escape The Ghosts	Medium	64.2%	Array Math	Read
790. Domino and Tromino Tiling	Medium	51.4%	Dynamic Programming	Read
791. Custom Sort String	Medium	72.3%	Hash Table Sorting+1	Read
792. Number of Matching Subsequences	Medium	50.8%	Array Binary Search+5	Read
793. Preimage Size of Factorial Zeroes Function	Hard	47.4%	Binary Search Math	Read
794. Valid Tic-Tac-Toe State	Medium	34.7%	Array Matrix	Read
795. Number of Subarrays with Bounded Maximum	Medium	55.4%	Array Two Pointers	Read
796. Rotate String	Easy	66.6%	String String Matching	Read
797. All Paths From Source to Target	Medium	83.6%	Backtracking Breadth-First Search+2	Read
798. Smallest Rotation with Highest Score	Hard	54.2%	Array Prefix Sum	Read
799. Champagne Tower	Medium	64.1%	Dynamic Programming	Read
800. Similar RGB Color	Easy	68.6%	Enumeration Math+1	Read

#751Medium

IP to CIDR

Bit ManipulationString

Acceptance: 53.7%

#752Medium

Open the Lock

ArrayBreadth-First SearchHash Table+1

Acceptance: 61.2%

#753Hard

Cracking the Safe

Depth-First SearchEulerian CircuitGraph

Acceptance: 58.5%

#754Medium

Reach a Number

Binary SearchMath

Acceptance: 45.5%

#755Medium

Pour Water

ArraySimulation

Acceptance: 49.1%

#756Medium

Pyramid Transition Matrix

Bit ManipulationBreadth-First SearchDepth-First Search

Acceptance: 60.6%

#757Hard

Set Intersection Size At Least Two

ArrayGreedySorting

Acceptance: 58.0%

#758Medium

Bold Words in String

ArrayHash TableString+2

Acceptance: 53.2%

#759Hard

Employee Free Time

ArrayHeap (Priority Queue)Sorting

Acceptance: 72.9%

#760Easy

Find Anagram Mappings

ArrayHash Table

Acceptance: 83.8%

#761Hard

Special Binary String

RecursionString

Acceptance: 79.4%

#762Easy

Prime Number of Set Bits in Binary Representation

Bit ManipulationMath

Acceptance: 78.7%

#763Medium

Partition Labels

GreedyHash TableString+1

Acceptance: 81.8%

#764Medium

Largest Plus Sign

ArrayDynamic Programming

Acceptance: 49.1%

#765Hard

Couples Holding Hands

Breadth-First SearchDepth-First SearchGraph+2

Acceptance: 59.8%

#766Easy

Toeplitz Matrix

ArrayMatrix

Acceptance: 69.8%

#767Medium

Reorganize String

CountingGreedyHash Table+3

Acceptance: 57.5%

#768Hard

Max Chunks To Make Sorted II

ArrayGreedyMonotonic Stack+2

Acceptance: 54.7%

#769Medium

Max Chunks To Make Sorted

ArrayGreedyMonotonic Stack+2

Acceptance: 64.1%

#770Hard

Basic Calculator IV

Hash TableMathRecursion+2

Acceptance: 49.8%

#771Easy

Jewels and Stones

Hash TableString

Acceptance: 89.5%

#772Hard

Basic Calculator III

MathRecursionStack+1

Acceptance: 53.2%

#773Hard

Sliding Puzzle

ArrayBacktrackingBreadth-First Search+3

Acceptance: 74.3%

#774Hard

Minimize Max Distance to Gas Station

ArrayBinary Search

Acceptance: 53.9%

#775Medium

Global and Local Inversions

ArrayMath

Acceptance: 42.9%

#776Medium

Split BST

Binary Search TreeBinary TreeRecursion+1

Acceptance: 82.5%

#777Medium

Swap Adjacent in LR String

StringTwo Pointers

Acceptance: 37.9%

#778Hard

Swim in Rising Water

ArrayBinary SearchBreadth-First Search+4

Acceptance: 68.3%

#779Medium

K-th Symbol in Grammar

Bit ManipulationMathRecursion

Acceptance: 48.7%

#780Hard

Reaching Points

Math

Acceptance: 34.3%

#781Medium

Rabbits in Forest

ArrayGreedyHash Table+1

Acceptance: 58.0%

#782Hard

Transform to Chessboard

ArrayBit ManipulationMath+1

Acceptance: 51.3%

#783Easy

Minimum Distance Between BST Nodes

Binary Search TreeBinary TreeBreadth-First Search+2

Acceptance: 61.8%

#784Medium

Letter Case Permutation

BacktrackingBit ManipulationString

Acceptance: 75.7%

#785Medium

Is Graph Bipartite?

Breadth-First SearchDepth-First SearchGraph+1

Acceptance: 59.6%

#786Medium

K-th Smallest Prime Fraction

ArrayBinary SearchHeap (Priority Queue)+2

Acceptance: 69.0%

#787Medium

Cheapest Flights Within K Stops

Breadth-First SearchDepth-First SearchDynamic Programming+3

Acceptance: 42.1%

#788Medium

Rotated Digits

Dynamic ProgrammingMath

Acceptance: 63.9%

#789Medium

Escape The Ghosts

ArrayMath

Acceptance: 64.2%

#790Medium

Domino and Tromino Tiling

Dynamic Programming

Acceptance: 51.4%

#791Medium

Custom Sort String

Hash TableSortingString

Acceptance: 72.3%

#792Medium

Number of Matching Subsequences

ArrayBinary SearchDynamic Programming+4

Acceptance: 50.8%

#793Hard

Preimage Size of Factorial Zeroes Function

Binary SearchMath

Acceptance: 47.4%

#794Medium

Valid Tic-Tac-Toe State

ArrayMatrix

Acceptance: 34.7%

#795Medium

Number of Subarrays with Bounded Maximum

ArrayTwo Pointers

Acceptance: 55.4%

#796Easy

Rotate String

StringString Matching

Acceptance: 66.6%

#797Medium

All Paths From Source to Target

BacktrackingBreadth-First SearchDepth-First Search+1

Acceptance: 83.6%

#798Hard

Smallest Rotation with Highest Score

ArrayPrefix Sum

Acceptance: 54.2%

#799Medium

Champagne Tower

Dynamic Programming

Acceptance: 64.1%

#800Easy

Similar RGB Color

EnumerationMathString

Acceptance: 68.6%

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Master DSA with Step-by-Step Solutions

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