Solutions & Explanations

Browse 4,030+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,030 Solutions961 Easy2102 Medium967 Hard

Title	Difficulty	Acceptance	Topics	Solution
2701. Consecutive Transactions with Increasing Amounts	Hard	33.0%	Database	Read
2702. Minimum Operations to Make Numbers Non-positive	Hard	44.1%	Array Binary Search	Read
2703. Return Length of Arguments Passed	Easy	94.4%		Read
2704. To Be Or Not To Be	Easy	62.6%		Read
2705. Compact Object	Medium	65.8%		Read
2706. Buy Two Chocolates	Easy	68.3%	Array Greedy+1	Read
2707. Extra Characters in a String	Medium	57.4%	Array Dynamic Programming+3	Read
2708. Maximum Strength of a Group	Medium	25.6%	Array Backtracking+5	Read
2709. Greatest Common Divisor Traversal	Hard	41.6%	Array Math+2	Read
2710. Remove Trailing Zeros From a String	Easy	79.5%	String	Read
2711. Difference of Number of Distinct Values on Diagonals	Medium	67.8%	Array Hash Table+1	Read
2712. Minimum Cost to Make All Characters Equal	Medium	54.9%	Dynamic Programming Greedy+1	Read
2713. Maximum Strictly Increasing Cells in a Matrix	Hard	31.3%	Array Binary Search+6	Read
2714. Find Shortest Path with K Hops	Hard	68.7%	Graph Heap (Priority Queue)+1	Read
2715. Timeout Cancellation	Easy	89.1%		Read
2716. Minimize String Length	Easy	79.6%	Hash Table String	Read
2717. Semi-Ordered Permutation	Easy	64.2%	Array Simulation	Read
2718. Sum of Matrix After Queries	Medium	32.5%	Array Hash Table	Read
2719. Count of Integers	Hard	38.9%	Dynamic Programming Math+1	Read
2720. Popularity Percentage	Hard	52.8%	Database	Read
2721. Execute Asynchronous Functions in Parallel	Medium	76.0%		Read
2722. Join Two Arrays by ID	Medium	55.4%		Read
2723. Add Two Promises	Easy	91.5%		Read
2724. Sort By	Easy	82.8%		Read
2725. Interval Cancellation	Easy	82.3%		Read
2726. Calculator with Method Chaining	Easy	76.2%		Read
2727. Is Object Empty	Easy	80.8%		Read
2728. Count Houses in a Circular Street	Easy	86.1%	Array Interactive	Read
2729. Check if The Number is Fascinating	Easy	53.0%	Hash Table Math	Read
2730. Find the Longest Semi-Repetitive Substring	Medium	39.3%	Sliding Window String	Read
2731. Movement of Robots	Medium	28.1%	Array Brainteaser+2	Read
2732. Find a Good Subset of the Matrix	Hard	45.4%	Array Bit Manipulation+2	Read
2733. Neither Minimum nor Maximum	Easy	76.2%	Array Sorting	Read
2734. Lexicographically Smallest String After Substring Operation	Medium	35.2%	Greedy String	Read
2735. Collecting Chocolates	Medium	35.4%	Array Enumeration	Read
2736. Maximum Sum Queries	Hard	31.2%	Array Binary Indexed Tree+5	Read
2737. Find the Closest Marked Node	Medium	65.4%	Array Graph+2	Read
2738. Count Occurrences in Text	Medium	55.6%	Database	Read
2739. Total Distance Traveled	Easy	41.9%	Math Simulation	Read
2740. Find the Value of the Partition	Medium	64.9%	Array Sorting	Read
2741. Special Permutations	Medium	29.4%	Array Bit Manipulation+2	Read
2742. Painting the Walls	Hard	49.0%	Array Dynamic Programming	Read
2743. Count Substrings Without Repeating Character	Medium	75.9%	Hash Table Sliding Window+1	Read
2744. Find Maximum Number of String Pairs	Easy	82.4%	Array Hash Table+2	Read
2745. Construct the Longest New String	Medium	55.3%	Brainteaser Dynamic Programming+2	Read
2746. Decremental String Concatenation	Medium	28.2%	Array Dynamic Programming+1	Read
2747. Count Zero Request Servers	Medium	36.3%	Array Hash Table+2	Read
2748. Number of Beautiful Pairs	Easy	53.5%	Array Counting+3	Read
2749. Minimum Operations to Make the Integer Zero	Medium	58.2%	Bit Manipulation Brainteaser	Read
2750. Ways to Split Array Into Good Subarrays	Medium	34.9%	Array Dynamic Programming+1	Read

#2701Hard

Consecutive Transactions with Increasing Amounts

Database

Acceptance: 33.0%

#2702Hard

Minimum Operations to Make Numbers Non-positive

ArrayBinary Search

Acceptance: 44.1%

#2703Easy

Return Length of Arguments Passed

Acceptance: 94.4%

#2704Easy

To Be Or Not To Be

Acceptance: 62.6%

#2705Medium

Compact Object

Acceptance: 65.8%

#2706Easy

Buy Two Chocolates

ArrayGreedySorting

Acceptance: 68.3%

#2707Medium

Extra Characters in a String

ArrayDynamic ProgrammingHash Table+2

Acceptance: 57.4%

#2708Medium

Maximum Strength of a Group

ArrayBacktrackingBit Manipulation+4

Acceptance: 25.6%

#2709Hard

Greatest Common Divisor Traversal

ArrayMathNumber Theory+1

Acceptance: 41.6%

#2710Easy

Remove Trailing Zeros From a String

String

Acceptance: 79.5%

#2711Medium

Difference of Number of Distinct Values on Diagonals

ArrayHash TableMatrix

Acceptance: 67.8%

#2712Medium

Minimum Cost to Make All Characters Equal

Dynamic ProgrammingGreedyString

Acceptance: 54.9%

#2713Hard

Maximum Strictly Increasing Cells in a Matrix

ArrayBinary SearchDynamic Programming+5

Acceptance: 31.3%

#2714Hard

Find Shortest Path with K Hops

GraphHeap (Priority Queue)Shortest Path

Acceptance: 68.7%

#2715Easy

Timeout Cancellation

Acceptance: 89.1%

#2716Easy

Minimize String Length

Hash TableString

Acceptance: 79.6%

#2717Easy

Semi-Ordered Permutation

ArraySimulation

Acceptance: 64.2%

#2718Medium

Sum of Matrix After Queries

ArrayHash Table

Acceptance: 32.5%

#2719Hard

Count of Integers

Dynamic ProgrammingMathString

Acceptance: 38.9%

#2720Hard

Popularity Percentage

Database

Acceptance: 52.8%

#2721Medium

Execute Asynchronous Functions in Parallel

Acceptance: 76.0%

#2722Medium

Join Two Arrays by ID

Acceptance: 55.4%

#2723Easy

Add Two Promises

Acceptance: 91.5%

#2724Easy

Sort By

Acceptance: 82.8%

#2725Easy

Interval Cancellation

Acceptance: 82.3%

#2726Easy

Calculator with Method Chaining

Acceptance: 76.2%

#2727Easy

Is Object Empty

Acceptance: 80.8%

#2728Easy

Count Houses in a Circular Street

ArrayInteractive

Acceptance: 86.1%

#2729Easy

Check if The Number is Fascinating

Hash TableMath

Acceptance: 53.0%

#2730Medium

Find the Longest Semi-Repetitive Substring

Sliding WindowString

Acceptance: 39.3%

#2731Medium

Movement of Robots

ArrayBrainteaserPrefix Sum+1

Acceptance: 28.1%

#2732Hard

Find a Good Subset of the Matrix

ArrayBit ManipulationHash Table+1

Acceptance: 45.4%

#2733Easy

Neither Minimum nor Maximum

ArraySorting

Acceptance: 76.2%

#2734Medium

Lexicographically Smallest String After Substring Operation

GreedyString

Acceptance: 35.2%

#2735Medium

Collecting Chocolates

ArrayEnumeration

Acceptance: 35.4%

#2736Hard

Maximum Sum Queries

ArrayBinary Indexed TreeBinary Search+4

Acceptance: 31.2%

#2737Medium

Find the Closest Marked Node

ArrayGraphHeap (Priority Queue)+1

Acceptance: 65.4%

#2738Medium

Count Occurrences in Text

Database

Acceptance: 55.6%

#2739Easy

Total Distance Traveled

MathSimulation

Acceptance: 41.9%

#2740Medium

Find the Value of the Partition

ArraySorting

Acceptance: 64.9%

#2741Medium

Special Permutations

ArrayBit ManipulationBitmask+1

Acceptance: 29.4%

#2742Hard

Painting the Walls

ArrayDynamic Programming

Acceptance: 49.0%

#2743Medium

Count Substrings Without Repeating Character

Hash TableSliding WindowString

Acceptance: 75.9%

#2744Easy

Find Maximum Number of String Pairs

ArrayHash TableSimulation+1

Acceptance: 82.4%

#2745Medium

Construct the Longest New String

BrainteaserDynamic ProgrammingGreedy+1

Acceptance: 55.3%

#2746Medium

Decremental String Concatenation

ArrayDynamic ProgrammingString

Acceptance: 28.2%

#2747Medium

Count Zero Request Servers

ArrayHash TableSliding Window+1

Acceptance: 36.3%

#2748Easy

Number of Beautiful Pairs

ArrayCountingHash Table+2

Acceptance: 53.5%

#2749Medium

Minimum Operations to Make the Integer Zero

Bit ManipulationBrainteaser

Acceptance: 58.2%

#2750Medium

Ways to Split Array Into Good Subarrays

ArrayDynamic ProgrammingMath

Acceptance: 34.9%

1 2 354 55 5679 80 81

Page 55 of 81

Master DSA with Step-by-Step Solutions

Each solution article on FleetCode breaks down the problem into multiple approaches, from brute force to optimal, with detailed explanations and code in Python, Java, C++ and more. Understanding why an approach works - not just copying code - is what separates candidates who clear interviews from those who don't.

How to Use These Solutions

Try the problem first: Spend at least 20 minutes before reading the solution
Read all approaches: Start from brute force to understand the problem fully, then study the optimized solution
Understand the complexity: Pay attention to time and space analysis for each approach
Code it yourself: After understanding the approach, close the solution and implement from memory
Revisit after a week: Spaced repetition helps retain problem-solving patterns