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From: Ben Bacarisse <ben@bsb.me.uk>
Newsgroups: sci.math
Subject: Re: Does the number of nines increase?
Date: Thu, 11 Jul 2024 02:46:32 +0100
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"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:

> On 7/10/2024 5:32 PM, Ben Bacarisse wrote:
>> "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:
>> 
>>> On 7/10/2024 4:29 PM, Moebius wrote:
>>>> Am 11.07.2024 um 01:02 schrieb Moebius:
>>>>> Am 11.07.2024 um 01:00 schrieb Moebius:
>>>>>> Am 11.07.2024 um 00:55 schrieb Moebius:
>>>>>>
>>>>>>> Math SHOULD BE fun! (imho)
>>>>>>
>>>>>> Hmmm... It's quite clear that WM doesn't have ANY fun with math, I'd
>>>>>> say.
>>>>>
>>>>> Actually, he doesn't DO any math.
>>>> Most cranks don't to any (real) math, they just "criticizes" (sort of)
>>>> things they don't really understand.
>>>
>>> If I am having a hard time understanding something, I ask/read around until
>>> I can finally grasp the underlying meaning of the problem to a point where
>>> I can code up a working solution. It has certainly tended worked for me in
>>> the past.
>> Here's and interesting problem to code up.  The input is a finite array
>> of n pairs of strings, so there are 2n strings in all.  They are often
>> thought of as strings on the top and bottom of a collection of tiles or
>> dominos, but that just help visualise the problem.  An example with n=3
>> might be
>>    aa     bb    abb
>>    aab    ba     b
>
> Just making up an example:
>
> ab   ab  ab = ababab
> aba  ba   b = ababab
>
> Would that work?

If I understand you, yes.  It's a simple case where the tiles, used once
in some order make a solution.  In most cases is will be much harder to
determine if there is a solution.

> Does each string need to be unique?

No.

-- 
Ben.