By now, Problem 901. Now! has not been solved without the use of cheats or hacks.
http://www.mathworks.com/matlabcentral/cody/problems/901-now
The goal of this Problem is to progressively design an anticheating test suite by learning from the solutions proposed by solvers of previous problems in the Now! series.
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8 Comments
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Jean-Marie Sainthillier
on 20 Aug 2012
Difficult without a clue
Óscar
on 23 Aug 2012
Everything is in memory
Óscar
on 6 Sep 2012
Everything is IN MEMory
J.R.! Menzinger
on 22 Nov 2012
So I found a way... and I think it was tricky, bun funny! ;-)
Jean-Marie Sainthillier
on 30 Nov 2012
I don't know how to use your CLUE in practice.
Jean-Marie Sainthillier
on 2 Dec 2012
Is it possible to modify the code link directly in memory ?
The test code is impressive.
Óscar
on 2 Dec 2012
Congrats, you found a way... but not the one I was expecting. Someone called "game" is preventing you from passing the test suite. "game" is somehow stored in memory (see "inmem"). Try unloading it. Hope this helps
Frequency Domain
on 23 Jul 2013
Try this one:
"Problem 1745 Get me!"
Solution Comments
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2 Comments
Tom Holz
on 2 Jan 2013
This is Solution 184498 rewritten for size.
Frequency Domain
on 23 Jul 2013
I liked the idea of deleting game.p :)
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4 Comments
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1 older comment
Tom Holz
on 2 Jan 2013
Solution 184561 is a "smaller" implementation of this approach.
Óscar
on 3 Jan 2013
Very well done! That was the solution I was expecting.
Tom Holz
on 3 Jan 2013
Can you examine the test function's mtree to check for dangerous functions, or save function handles to builtins used by the test suite before calling the user code? Aside from making file i/o impossible (e.g. by fixing the sandbox filesystem permissions before calling user code), I don't see how to prevent these kinds of cheats.
Óscar
on 3 Jan 2013
Thank you for your hints! I'll see what to add to "Now! (Anticheating version 2)", I would not like to block file i/o.
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