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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.
In c++ 0 is for false and 1 is for true. Use boolalpha for literal use of true and false.
Use spoiler flag next time, please.
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There is several ways for this kind of work. But it depends on the language you are using. As an example, in c# there is a string function called Insert(). Using that function you can easilly do this task. There is some equivallent functions in most of the language. You should consult the respected documentation.
What is your problem?
Look at the function return type, and then at the value you're trying to return.
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