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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.
You are right, I totally misunderstood. Thank you!
This is the input "Test.assertEquals(nextBigger(144),414)" , and on my IDE if I test with '144' I get '-1' . Do you think there is an error on the testing from the kata ? or am I missing something ?
based on that error I assume that the input is '414' and I tested and got '441'.
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