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Solutions & Explanations

Browse 4,029+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,029 Solutions961 Easy2102 Medium966 Hard
#2441Easy

Largest Positive Integer That Exists With Its Negative

ArrayHash TableSorting+1

Acceptance: 74.9%

#2446Easy

Determine if Two Events Have Conflict

ArrayString

Acceptance: 53.1%

#2451Easy

Odd String Difference

ArrayHash TableString

Acceptance: 61.9%

#2455Easy

Average Value of Even Numbers That Are Divisible by Three

ArrayMath

Acceptance: 63.6%

#2460Easy

Apply Operations to an Array

ArraySimulationTwo Pointers

Acceptance: 74.7%

#2465Easy

Number of Distinct Averages

ArrayHash TableSorting+1

Acceptance: 58.9%

#2469Easy

Convert the Temperature

Math

Acceptance: 90.4%

#2475Easy

Number of Unequal Triplets in Array

ArrayHash TableSorting

Acceptance: 73.3%

#2480Easy

Form a Chemical Bond

Database

Acceptance: 77.0%

#2481Easy

Minimum Cuts to Divide a Circle

GeometryMath

Acceptance: 56.7%

#2485Easy

Find the Pivot Integer

MathPrefix Sum

Acceptance: 83.8%

#2490Easy

Circular Sentence

String

Acceptance: 70.2%

#2496Easy

Maximum Value of a String in an Array

ArrayString

Acceptance: 74.2%

#2500Easy

Delete Greatest Value in Each Row

ArrayHeap (Priority Queue)Matrix+2

Acceptance: 80.5%

#2504Easy

Concatenate the Name and the Profession

Database

Acceptance: 77.0%

#2506Easy

Count Pairs Of Similar Strings

ArrayBit ManipulationCounting+2

Acceptance: 73.7%

#2511Easy

Maximum Enemy Forts That Can Be Captured

ArrayTwo Pointers

Acceptance: 41.8%

#2515Easy

Shortest Distance to Target String in a Circular Array

ArrayString

Acceptance: 65.1%

#2520Easy

Count the Digits That Divide a Number

Math

Acceptance: 85.9%

#2525Easy

Categorize Box According to Criteria

Math

Acceptance: 40.7%

#2529Easy

Maximum Count of Positive Integer and Negative Integer

ArrayBinary SearchCounting

Acceptance: 74.3%

#2535Easy

Difference Between Element Sum and Digit Sum of an Array

ArrayMath

Acceptance: 85.3%

#2540Easy

Minimum Common Value

ArrayBinary SearchHash Table+1

Acceptance: 60.9%

#2544Easy

Alternating Digit Sum

Math

Acceptance: 69.7%

#2549Easy

Count Distinct Numbers on Board

ArrayHash TableMath+1

Acceptance: 61.7%

#2553Easy

Separate the Digits in an Array

ArraySimulation

Acceptance: 85.7%

#2558Easy

Take Gifts From the Richest Pile

ArrayHeap (Priority Queue)Simulation

Acceptance: 75.5%

#2562Easy

Find the Array Concatenation Value

ArraySimulationTwo Pointers

Acceptance: 71.9%

#2566Easy

Maximum Difference by Remapping a Digit

GreedyMath

Acceptance: 75.5%

#2570Easy

Merge Two 2D Arrays by Summing Values

ArrayHash TableTwo Pointers

Acceptance: 81.7%

#2574Easy

Left and Right Sum Differences

ArrayPrefix Sum

Acceptance: 89.5%

#2578Easy

Split With Minimum Sum

GreedyMathSorting

Acceptance: 73.4%

#2582Easy

Pass the Pillow

MathSimulation

Acceptance: 56.8%

#2586Easy

Count the Number of Vowel Strings in Range

ArrayCountingString

Acceptance: 74.3%

#2591Easy

Distribute Money to Maximum Children

GreedyMath

Acceptance: 20.5%

#2595Easy

Number of Even and Odd Bits

Bit Manipulation

Acceptance: 73.4%

#2600Easy

K Items With the Maximum Sum

GreedyMath

Acceptance: 60.2%

#2605Easy

Form Smallest Number From Two Digit Arrays

ArrayEnumerationHash Table

Acceptance: 55.1%

#2609Easy

Find the Longest Balanced Substring of a Binary String

String

Acceptance: 46.6%

#2614Easy

Prime In Diagonal

ArrayMathMatrix+1

Acceptance: 39.0%

#2619Easy

Array Prototype Last

Acceptance: 74.0%

#2620Easy

Counter

Acceptance: 81.6%

#2621Easy

Sleep

Acceptance: 87.3%

#2626Easy

Array Reduce Transformation

Acceptance: 85.1%

#2629Easy

Function Composition

Acceptance: 86.7%

#2634Easy

Filter Elements from Array

Acceptance: 85.1%

#2635Easy

Apply Transform Over Each Element in Array

Acceptance: 86.0%

#2639Easy

Find the Width of Columns of a Grid

ArrayMatrix

Acceptance: 71.0%

#2643Easy

Row With Maximum Ones

ArrayMatrix

Acceptance: 74.2%

#2644Easy

Find the Maximum Divisibility Score

Array

Acceptance: 52.3%

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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