Learn DSADSAContests
coding75 logo
LeetCode POTDPOTDSheets
coding75 Pro
coding75 logo
Dashboard
Learn DSA
Course RoadmapFlow
DSA Topic TreeNew πŸš€
Contest SolutionsPractice
Practice Sheets
MasterclassesLive πŸ‘¨πŸ»β€πŸ’»

coding75 ProPRO

Live Classes & Placement Guidance

coding75 logo

The premier developer platform for mastering Data Structures & Algorithms, exploring contest editorials, building ATS-ready resumes, and accelerating your tech career.

Connect & Community

DSA & Contests

  • Learn DSA
  • Contest Solutions
  • LeetCode POTDDaily
  • Practice Sheets
  • MasterclassesSoon

Interview Prep

  • Portfolio Projects
  • CS Fundamentals
  • System DesignSoon
  • Interview ExperiencesSoon
  • Mock InterviewsSoon

Career & Pro

  • Jobs & Internships
  • Resume BuilderATS
  • coding75 Pro
  • Submit Feedback
Β© 2026coding75β€’crackDSAβ„’β€’Maa Lalita Edtech Private Limited. All Rights Reserved.
Privacy PolicyTerms & ConditionsContact Support
Registered Office: Kanpur 208021β€’Regional Office: Indiranagar, Bangalore, 560008
Maa Lalita Edtech Private Limited
Contests/Codeforces/Codeforces Round 956/D. Swap Dilemma
Prev
CodeforcesCodeforces
Expert
Codeforces Round 956

D. Swap Dilemma

GreedySortingMerge SortMath
Loading...
Solve on Codeforces

Problem Statement

Official algorithmic problem description and constraints.

Open on Codeforces

Given two arrays of distinct positive integers π‘Ž and π‘ of length π‘›, we would like to make both the arrays the same. Two arrays π‘₯ and π‘¦ of length π‘˜ are said to be the same when for all 1β‰€π‘–β‰€π‘˜, π‘₯𝑖=𝑦𝑖.

Now in one move, you can choose some index π‘™ and π‘Ÿ in π‘Ž (π‘™β‰€π‘Ÿ) and swap π‘Žπ‘™ and π‘Žπ‘Ÿ, then choose some π‘ and π‘ž (π‘β‰€π‘ž) in π‘ such that π‘Ÿβˆ’𝑙=π‘žβˆ’π‘ and swap π‘π‘ and π‘π‘ž.

Is it possible to make both arrays the same?

Solutions & Walkthrough

Detailed video explanations, mathematical intuition, and clean C++ implementation code.

Connecting secure classroom stream...
Back to Codeforces Round 956
Previous Problem