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    Same! I tried all of these as well.

    That did my head in.

    Well, we've definitely got the idea of efficient functional algorithms anyway!

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    This comment is hidden because it contains spoiler information about the solution

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    written by someone who had completely forgotten math

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    Thanks for the feedback. I went ahead and made the statement that the questions are case sensitive its own line. I hope this helps future coders!

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    The hardest part was realizing that the questions were case sensitive, eventhough I was sure I had read the full specs. :|

    It's a good teaching tool in that people will learn to really understand the specs, but the rating will probably be lower than if "The questions are case sensitive" had its own line in the specs or was more obvious some other way.