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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.
this soloution runs the whole function on a string with length of more than 140 chars.
oh my god! this genius proved that being a programmers needs no brain!
try more!
I think it's the best approach because of the high performance of the solution. as I estimated, it's about 26000 times fatser than the regular solutions! it's fantastic.