Use a view on the integer variables?
On 10/25/14, 5:25 AM, Bouchene Sabrina wrote:
Hi,
I want to use "alldifferent" constraint or a "distinct" constraint but
in my case, i have a matrix M and i would that the elements (values)
of the row of a matrix be different, but the variables of the row can
have positive and negative values, so i would have a constraint that
for example:
if row = 1 thenthe absolute values of M[1, j] could be all different,
that means, if i have M[1,1]=(-3), i should not get M[1,j] =(+3) for j
=1 to n. so in the same row or in the same column if i have (val) i
must not have (-val) or if i have (-val) i mast not have (val).
alldifferent (|M[i, j]|).
My question is how to write this constraint in Gecode ?.
I hope my question was clear.
Best regards. Sabrina
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