This is just delightful. @gbaraldi posted on Slack so I got to decipher it without explanation, which took me a while. What a nice puzzle. 
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Thanks for the explanation!
Sorry if this was mentioned before (my eyes glaze over a bit at all of this arcana), but does \n count as 2 bytes, or 1? If 1, wouldn’t print(...,"$i\n") be shorter?
No, because you’d need the \n in the Fizz and Buzz parts as well. It’s also bytes of source code that count, so at best you could insert a literal newline byte.
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correct, \n is two characters, hence two bytes. It’s better to type in directly the newline in certain cases. Say you have
println("abc\nabc")
this (19bytes) can be shorter (17bytes)
print("abc
abc
")
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Of course, if we trust that site not to be trolling us.
The question was about existence of a solution of given lengths using particular methods not whether any possible solutions of specific lengths.
They take code golfing very seriously and the website code is open-source. Loopholes and exploits are fixed readily. I trust that the solution is legit
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