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MiniZinc

/***
!Test
expected:
- !Result
solution: !Solution
a:
- [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
- [0, 0, 0, 0, 0, 1, 0, 1, 2, 0, 0, 0]
- [0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0]
- [0, 1, 0, 0, 0, 3, 0, 1, 0, 0, 2, 0]
- [0, 0, 0, 0, 0, 4, 0, 2, 0, 0, 0, 0]
- [0, 0, 1, 0, 0, 0, 0, 3, 0, 1, 0, 0]
- [0, 0, 2, 0, 1, 2, 0, 0, 0, 0, 0, 0]
- [0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0]
- [0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0]
- [0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0]
- [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
- [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
col_sums: [1, 3, 0, 2, 5, 0, 5, 1, 1, 2]
row_sums: [3, 2, 4, 2, 3, 3, 1, 1, 1, 0]
***/
% Example battleships problem for battleships.mzn.
%
include "battleships.mzn.model";
n = 10;
a = array2d(ROW, COL,
[| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
| 0, _, _, _, _, _, _, _, _, 0, _, 0
| 0, 0, _, _, _, _, _, _, _, _, _, 0
| 0, _, 0, _, _, _, _, _, _, _, _, 0
| 0, 0, _, _, _, _, _, _, _, _, _, 0
| 0, _, _, _, _, _, _, _, _, _, _, 0
| 0, _, _, _, _, _, _, _, _, _, _, 0
| 0, _, _, _, _, _, _, _, _, _, _, 0
| 0, _, _, _, _, _, _, 0, _, _, _, 0
| 0, _, _, _, _, _, _, _, _, _, _, 0
| 0, _, _, _, _, _, _, _, _, _, _, 0
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
|]
);
constraint a[4, 2] > 0;
row_sums = [3, 2, 4, 2, 3, 3, 1, 1, 1, 0];
col_sums = [1, 3, 0, 2, 5, 0, 5, 1, 1, 2];
n_classes = 4;
class_sizes = [4, 3, 2, 1];