Originally posted by: mohsensalar

Hi everybody
I want declare a variable with this indices
1..5 U 7..16 U 26 U 29..33
I want use this variable with another variable in inverse function in CP
I will grateful someone who can help me
#DecisionOptimization
#OPLusingCPOptimizer

Originally posted by: SystemAdmin

Hello,
Could you be more precise about what you want to do.

> I want declare a variable with this indices 1..5 U 7..16 U 26 U 29..33
> I want use this variable with another variable in inverse function in CP

Which function do you want to inverse?
The one that maps some index of the possible values (21 values => index in [1..21]) to the values themselves (1..5 U 7..16 U 26 U 29..33) ?

You can do that with a constraint x==ARRAY[y] where x is a variable describing the value and y an index variable.

using CP;   
{

int
} domain = union(v in 1..5)   
{v
} union union(v in 7..16)  
{v
} union union(v in 26..26) 
{v
} union union(v in 29..33) 
{v
};   

int n = card(domain); 

int vmin = min(v in domain) v; 

int vmax = max(v in domain) v; 

int val[i in 1..n] = item(domain, i-1);   dvar 

int x in vmin..vmax; 
// Value dvar 

int y in 1..n;       
// Index constraints 
{ x in domain; x == val[y]; 
};

Philippe
#DecisionOptimization
#OPLusingCPOptimizer