I don't see how a person was supposed to solve this without doing some crypto analysis. Could you explain that please? I read your spoiler and thought it'd be trivial to write a regex to extract the solution. Here it is. It's really slow. It'd be faster if I could use backreferences in negated character classes. I could have written this using a regex that generates another regex to incorporate the negated backreference but that seemed like a whole lot of work and I guessed it wouldn't be . It's pretty as-is.
[Updated: Added an expensive and less wasteful version. I'll be adding timing info when my computer has finished running these. They succeed within a few minutes but take a lot longer to finish failing.]
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
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.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||