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Largest number divisible by its digits: Difference between revisions
→base 16
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Line 448:
high = (0xfedcba987654321_i64 // magic) * magic
high.step(to: magic, by: -magic)
s = i.to_s(16) # always generates lower case a-f
next if s.includes?("0") || s.chars.uniq.size != s.size # need uniq non-zero digits
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