ChallengeRocket
  • Challenges
  • Find jobs
  • Candidate Hub
  • Employers / Post a Job
  • Log in
  • Sign up now
Menu
  • Home
  • Challenges
  • Smaller Number With The Same Digits

Smaller Number With The Same Digits

Smaller Number With The Same Digits

Before you start the test, check out our tutorial challenge

~10MIN
Start: Nov 06, 2019
SKILL PRACTICE CHALLENGE
  • Challenge outline
  • Tips
  • Leaderboard
Smaller Number With The Same Digits
  • Challenge outline
  • Tips
  • Leaderboard

Challenge overview

Hello and welcome to the challenge!


Write a code that receives a positive integer number and returns the next smaller positive integer number formed from the same digits. Return -1 if that's impossible.

Examples

  • solve(51) -> 15
  • solve(232) -> 223
  • solve(444) -> -1

Input

  • the given number

Output

  • -1 or the next smaller number made from the same digits


You can solve this programming contest in C++, C#, Ruby, JavaScript, Python and many other languages. If you want, you can also take part in other Challenges. Below you can find some of them:


  • String Rotation
  • Subarray Element Counter
  • Max Difference


Have fun and good luck! :)

By using our site, you agree to challengerocket's use of cookies in accordance with our privacy policy.
ChallengeRocket
Tech talent
Challenges Blog Find jobs Candidate Hub
Companies
Business HR Blog Pricing
Challengerocket
FAQ EU Join Us Contact Us
Copyright © 2022 ChallengeRocket. All rights reserved.
Privacy Terms and Conditions Service status

Log in

Don’t have account?
Create a candidate account
or

Forgot your password?

Log in

Don’t have account?
Create an employer account

Forgot your password?

Create a candidate account

Already have an account?
Log in
or
  • At least 8 characters
  • Uppercase Latin characters
  • Lowercase Latin characters
  • At least one number or symbol

Not a candidate?  Sign up as an employer

Reset your password

Remember your password? Log in Log in for business

Create an employer account

Sign up for free.
Select the best plan to publish job ofers & challenges.

Company name introduced here will be visible on your job ads.
  • At least 8 characters
  • Uppercase Latin characters
  • Lowercase Latin characters
  • At least one number or symbol

Not an employer?  Sign up as a candidate