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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.
I am not a fan of how this is structured, I solved this assuming that the input was the actual value not inputting characters. This kata should be about drawing a triangle and not parsing input.
Also why don't the expected outputs have newlines? When outputting text it should end with a newline.
Is it expected to output result in "decimal string"? The output is expecting "15" and my output is '\u000f'.
Why do you constantly ask for outputs as strings rather than just values? :o (especially when the returned ouput has to be a boolean or a number in the range 0-255)
IMHO, that doesn't make the task more interesting, it's just a "formatting painfuck" addition. ;o