Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Mark,
Your challenge was to write an elegant, fast, or golfish program. As I look at the problem, I can see an elegant solution, but unfortunately all the implementations I have tried so far are slow in comparison.

You can treat the problem as a tree where each node has two children - the sqrt and the factorial. The stack starts out with the root node (3). After each node has its two children, it is removed from the stack and placed in the tree. A branch is terminated if the child node represents its parent (sqrt(1) = 1, fact(2) = 2), the node is already present in the tree, or the number is beyond a user imposed limit.

Finding the path to a particular node is done in reverse (since the tree is represented by a hash). You select the node and traverse backwards to the root. If you would like to see my implementation, let me know and I will post what I came up with tomorrow when I get to work.


Cheers - L~R

Note: It is assumed that each operation will result in an implicit floor()

In reply to Re: Challenge: Chasing Knuth's Conjecture by Limbic~Region
in thread Challenge: Chasing Knuth's Conjecture by kvale

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • 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:
    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
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (7)
    As of 2019-12-16 08:06 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      No recent polls found

      Notices?