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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.
makes sense ty
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chic!
I don't get it. You iterate through the array only once. What if opposite direction pairs appear after you perform some other deletions?
is it be more better if we use {for}?
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yes, i have same opinion, using api to simplify the code but it have poor performance
Doesn't matter. In the end it's only important whether the number of 'w's and 'e's was equal. Which one is +1 and which one is -1 doesn't change that.
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Kind of embarassing that a O(n^2) is this high up :/
Nice job!
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