<airport>
<exampleName>AIRPORT</exampleName>
<category>nco</category>
<solver>Knitro</solver>
<inputMethod>AMPL</inputMethod>
<priority>short</priority>
<model><![CDATA[param N:=42;
param r{1..N};
param cx{1..N};
param cy{1..N};

var x{1..N} <= 10, >= -10;
var y{1..N} <= 10, >= -10;

minimize f:
	sum {i in 1..N-1, j in i+1..N} ( (x[i]-x[j])^2 + (y[i]-y[j])^2 );
subject to cons1 {i in 1..N}:
	(x[i]-cx[i])^2 + (y[i]-cy[i])^2 - r[i] <= 0;

  ]]></model>

  <data>
data;
param r:=
1                  0.09 
2                  0.3
3                  0.09
4                  0.45
5                  0.5
6                  0.04
7                  0.1
8                  0.02
9                  0.02
10                 0.07
11                 0.4
12                 0.045
13                 0.05
14                 0.056
15                 0.36
16                 0.08
17                 0.07
18                 0.36
19                 0.67
20                 0.38
21                 0.37
22                 0.05
23                 0.4
24                 0.66
25                 0.05
26                 0.07
27                 0.08
28                 0.3
29                 0.31
30                 0.49
31                 0.09
32                 0.46
33                 0.12
34                 0.07
35                 0.07
36                 0.09
37                 0.05
38                 0.13
39                 0.16
40                 0.46
41                 0.25
42                 0.1;

param cx:=
1                 -6.3
2                 -7.8
3                 -9.0
4                 -7.2
5                 -5.7
6                 -1.9
7                 -3.5
8                 -0.5
9                 1.4
10                4.0
11                2.1
12                5.5
13                5.7
14                5.7
15                3.8
16                5.3
17                4.7
18                3.3
19                0.0
20                -1.0
21                -0.4
22                4.2
23                3.2
24                1.7
25                3.3
26                2.0
27                0.7
28                0.1
29                -0.1
30                -3.5
31                -4.0
32                -2.7
33                -0.5
34                -2.9
35                -1.2
36                -0.4
37                -0.1
38                -1.0
39                -1.7
40                -2.1
41                -1.8
42                0.0;

param cy:=
1                 8.0
2                 5.1
3                 2.0
4                 2.6
5                 5.5
6                 7.1
7                 5.9
8                 6.6
9                 6.1
10                5.6
11                4.9
12                4.7
13                4.3
14                3.6
15                4.1
16                3.0
17                2.4
18                3.0
19                4.7
20                3.4
21                2.3
22                1.5
23                0.5
24                -1.7
25                -2.0
26                -3.1
27                -3.5
28                -2.4
29                -1.3
30                0.0
31                -1.7
32                -2.1
33                -0.4
34                -2.9
35                -3.4
36                -4.3
37                -5.2
38                -6.5
39                -7.5
40                -6.4
41                -5.1
42                0.0;
  </data>

  <comments>This problem is AIRPORT from the CUTEr collection.</comments>

</airport>