Problem 2360. Fill an array given a sum and array length values

Created by Omer

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55 Solutions
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Last Solution submitted on Jul 19, 2020

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Ashan Peiris on 12 Jun 2014

Tricky problem !!

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Solution 454779

1 Comment

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Jan Orwat on 13 Jun 2014

lucky shot

Solution 454502

1 Comment

1 Comment

Omer on 13 Jun 2014

well done guillaume, thanks for trying random numbers as well. great effort!

Solution 454370

1 Comment

1 Comment

Omer on 13 Jun 2014

well done alfonso, thanks for trying random numbers as well. im learning new techniques here as well.

Solution 454329

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4 Comments

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Omer on 12 Jun 2014

well done. alfonso how can i amend the problem so that the coder will be forced to generate random values? :)

Alfonso Nieto-Castanon on 12 Jun 2014

true randomness is a bit involved to test (particularly without the stats toolbox), plus the sum constrain adds some additional complexity to the randomness of the resulting values (see for example this Cody problem: http://www.mathworks.com/matlabcentral/cody/problems/331-compute-area-from-fixed-sum-cumulative-probability). In any way, the simplest solution to discourage this sort of extremely-non-random solutions would probably be running your current testsuite twice (with identical inputs) and then checking that the returned vectors are different...

Guillaume on 13 Jun 2014

Another possibility, would be to test that there is no repetition in the returned values, which can easily be tested with: assert(all(diff(sort(sum_array))));

Omer on 14 Jun 2014

you're right guillaume, i apppreciate that.

Solution 454316

3 Comments

3 Comments

Omer on 12 Jun 2014

well done! :) quick solution. however i was expecting coder to generate random values each epoch :)

Guillaume on 13 Jun 2014

I've now provided a solution that does generate random values.

Omer on 16 Jun 2014

i've changed the test suit following ur approach, thanks.

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Problem 2360. Fill an array given a sum and array length values

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Problem 2360. Fill an array given a sum and array length values

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