Dobbins Long Journey - A possible New Problem
Back to General discussions forum
This is an optimisation problem with a difference.
Rodion, the relevant files are in your e-mail.
There should, of course, be an apostrophe in Dobbin's !
Clive:
Thanks for this problem!
Would you mind taking a look at the case of 7.872 5.563 6.045 10.644? My solution and your checker seem to disagree about this single case (I can arrange the journey to take 14013, if this helps).
I obviously suspected my solution first, but given that it belongs to the same, um, family (trying to be vague here) that is solved correctly in every other case, I would like to make sure there are no issues elsewhere.
I think I detect a hint in the above. Thanks. :)
Vladimir, Many thanks for alerting me to a possible problem. When I saw that Mathias had solved the problem yesterday I took this to be confirmation that everything was working properly. Consequently I have not re-visited the site until now.
I'm sorry to have missed your report but am grateful to Mathias for spotting it and providing a carefully considered reply.
When I designed the problem I realised that there was the potential to make an unjustified (and incorrect) assumption. The sets of test data are generated randomly but I have ensured that at least one set of test data will address this particular issue. This explains why you could have one test fail among 6 others that are correct.
When I do make a mistake (which is bound to happen) I am really grateful to know that I am likely to get some rapid feedback to that effect.
Many thanks to you both and Happy New year.
Thanks, Clive (and Mathias); I've got it shortly after the exchange above.