Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Re: Re: (Golf) Kaprekar's Process

by sean (Beadle)
on Jun 17, 2001 at 21:38 UTC ( [id://89179]=note: print w/replies, xml ) Need Help??


in reply to Re: (Golf) Kaprekar's Process
in thread (Golf) Kaprekar's Process

This doesn't work for a lot of numbers, because you're checking AFTER the sort, for 459, which could've been 459,495,954,945,549, or 594 before the sort. your code gets the right answer when it was anything EXCEPT 495 before the sort.
For example, 247:

1: 742-247 = 495
the answer is 1.

your code produces 2.

Replies are listed 'Best First'.
Re: Re: Re: (Golf) Kaprekar's Process
by tachyon (Chancellor) on Jun 18, 2001 at 03:19 UTC

    Good point, what can I say, seemed like a good idea at the time. The thinking was that any combination of 4,5,9 will sort to 954 and reverse to 459 so the timing of the sort was not important. As you note this breaks down in some cases. The QA was a bit suboptimal - I just bunged in the two examples and when they worked...

    Drat! I knew sneaking in a solution shorter than MeowChow was to good to be true :-)

    Cheers

    tachyon

[reply]

In Section Meditations

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?

www.com | www.net | www.org
Node Status?
node history
Node Type: note [id://89179]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? • Last hour • Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (5)
As of 2024-04-20 11:43 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found