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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

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! :)

Smaller Number With The Same Digits

Challenge overview

Examples

Input

Output

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