Knapsack problem/0-1: Difference between revisions
Realize in MiniZinc
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</lang>
=={{header|MiniZinc}}==
<lang MiniZinc>
%Knapsack 0/1. Nigel Galloway: October 5th., 2020.
enum Items={map,compass,water,sandwich,glucose,tin,banana,apple,cheese,beer,suntan_cream,camera,t_shirt,trousers,umbrella,waterproof_trousers,waterproof_overclothes,note_case,sunglasses,towel,socks,book};
array[Items] of int: weight=[9,13,153,50,15,68,27,39,23,52,11,32,24,48,73,42,43,22,7,18,4,30];
array[Items] of int: value =[150,35,200,160,60,45,60,40,30,10,70,30,15,10,40,70,75,80,20,12,50,10];
int: maxWeight=400;
var int: wTaken=sum(n in take)(weight[n]);
var int: wValue=sum(n in take)(value[n]);
var set of Items: take;
constraint wTaken <= maxWeight;
solve maximize wValue;
output["Take "++show(take)++"\nTotal Weight=\(wTaken) Total Value=\(wValue)"]
</lang>
{{out}}
<pre>
Take {map, compass, water, sandwich, glucose, banana, suntan_cream, waterproof_trousers, waterproof_overclothes, note_case, sunglasses, socks}
Total Weight=396 Total Value=1030
</pre>
=={{header|Nim}}==
This solution uses the same algorithm as Go and Kotlin, with some modifications to improve performance:
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