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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.
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mwrum, your solution is not correct either.
The expression (sum + i > Integer.MAX_VALUE) is always false if sum and i are both integers (at least one should be long), because the sum will overflow and become negative.
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Counter question: What happens if there is an integer overflow in Java? - Right, it goes back to min value which is < 0.
Thus, no requirements have been ignored.