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Smaller Number With The Same Digits

Smaller Number With The Same Digits

Before you start the test, check out our tutorial challenge

Before you start the test, check out our tutorial challenge

~25MIN
Start: Nov 06, 2019
CODE CHALLENGE
  • Challenge outline
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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 November 2019 competitions. Below you can find some of them:


  • String Rotation
  • Subarray Element Counter
  • Max Difference


Have fun and good luck! :)

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