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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
There are a dozen languages, please specify the language so issue(s) can be fixed.
I am not a native speaker, but what is hard in understanding that you should just return the next bigger number using the same digits? Also, you can still print inputs and read the expected results of each test, can't you?
Ok, with Java is then out of my hands: post under the Java translator comment, so that he can be notified.
Cheers!
They are called "random tests" for a reason ;)
Language?