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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.
The problem description is not very clear. I have no idea of what
data1is in the description. And for the test case in C language, thechar* datadoesn't have a proper ending character, the program would have no idea of where the string should end.