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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.
索引是从0开始的，索引6左边的所有数的和为0
10 -80 + 10 + 10 + 15 + 35 = 0and right of the 20 (index 6) there is no other number, that counts as 0 too. It's similar to the last example in the description.This comment is hidden because it contains spoiler information about the solution