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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.
why i cant pass limt test.
I can't pass the performance test . why?
how can i reslove it?
you could use pow in cmath,which type is double not long long .
oh！
of course divisor is not zero
I think that he just wants to save spaces.
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