I just noticed a very similar Roman numeral golf recently concluded at golf.shinh.org.
Adjusting ySas' winning Perl solution to that game for this one produces this 58 stroker:
which has a similar form to robin
's early-lead 60 stroker above -- though it uses a different algorithm.
Both these solutions are very beautiful, very Perlish, and quite astonishing (at least to me).
I especially enjoyed ySas' ingenious use of @- above. I've never seen @- used like that
in golf before and am tempted to give it a name, "ySas' device".
By way of explanation, note that adding parentheses around (M) above adds one
more element to the @- array when the (parenthesized) M matches.
That is, the number of items in @- is used to
differentiate between a matching M (two items in @-) and
a matching D (one item in @-);
this fits like a glove here because one and two happen to be the required multipliers.
Update: By applying ideas from ySas' solution, we can reduce Robin's
y/DCLXVIM /4 DCLX9/,$\=s/( )?\d/9x($&+!$1)/egfor(<>)x4;print
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||