Op 18-9-2020 om 06:45 schreef Richard O'Keefe:
Roman numerals are much more complicated and much less consistent
than most people realise.  The regular M DC LX VI system is both
more modern and less capable than anything the Romans would have
recognised.  In particular,
 - in the 8th century, N (short for "nulla") was adopted for zero
 - the Roman system always had fractions like S for 1/2, . for 1/12
 - there were numerals for much larger numbers.
Unicode code block [2150] has characters for the Roman numerals
including
216C L ROMAN NUMERAL FIFTY
216D C ROMAN NUMERAL ONE HUNDRED
216E D ROMAN NUMERAL FIVE HUNDRED
216F M ROMAN NUMERAL ONE THOUSAND
2181 ↁ ROMAN NUMERAL FIVE THOUSAND
2182 ↂ ROMAN NUMERAL TEN THOUSAND
2187 ↇ ROMAN NUMERAL FIFTY THOUSAND
2188 ↈ ROMAN NUMERAL ONE HUNDRED THOUSAND
(In fact these are ligated versions of forms using "apostrophic" brackets;
the pattern goes as high as you want, e.g., (((|))) for a million.
D and M were originally |) and (|).   There is

So the first thing is to make sure that you understand the
requirements for the problem.
- Are you required to produce ASCII characters, required to
  produce Unicode ones, or allowed to produce either?

as far as I can see from the tests only ASCI characters.

- Are you required to support zero?

No

- Are you required to support n/12 fractions (1<=n<=11)?

NO

- Are you allowed, required, or forbidden to use the "overline"
  convention, where an overline means "multiply by 1000"?
  =-------

In the test that one is not used.
  ICCXXXIVDLXVII = 1,234,567
- Are you allowed, required, or forbidden to use "additive"
  form "IIII" as well as/instead of "subtractive" form "IV"?
- Are you to use upper case or lower case letters?
- And so on.




the number 4 needs to be  "IV"

Roelof

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