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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.
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#11b35/3qb:0z:vV
it is the tradeoff for using a scrited language. it is almost impossible to do
anything without headers in c.
If description doesn't say otherwise then using already existing functions is pretty good approach. In any case everyone is free in ways of solving.
this is technically legal, and elegant, and the authors can't be faulted for using this because it wasn't prohibited, but it defeats the purpose of the kata if you can just use a built in string method at least in my mind.