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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.
Gotcha. Thanks.
So you can guarentee that random tests will not provide any inputs that are not possible to construct a valid time. This sounds much better than "Every input has a valid answer.". Thanks.
I am sorry but, the description is just ambigious or am I just being difficult? It said "every input". Not 'every possible input that can yield valid answer'. So I suppose, 5,6,7,8 is part of every input. If the statement is "every possible" input then sure, your statement is correct.
Are 4 digits supposed to be the ones from test cases only or all possible digits? If so 'Every inputs have valid answer' might not agree with the input 5,6,7,8 .