/***
!Test
expected:
- !Result
  solution: !Solution
    a:
    - [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    - [0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0]
    - [0, 2, 0, 2, 0, 2, 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]
    - [0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 1, 0]
    - [0, 1, 2, 3, 4, 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, 1, 2, 3, 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, 0]
    col_sums: [3, 2, 4, 2, 2, 2, 2, 1, 1, 1]
    row_sums: [4, 4, 0, 0, 4, 4, 0, 0, 4, 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
     |]
);

constraint a[3, 8] > 0;
constraint a[7, 5] > 0;

row_sums = [4, 4, 0, 0, 4, 4, 0, 0, 4, 0];

col_sums = [3, 2, 4, 2, 2, 2, 2, 1, 1, 1];

n_classes = 4;

class_sizes = [4, 3, 2, 1];