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  1. cases = {[6 8; 1 10; 6 6; 5 9; 8 10];
  2. 		 [3 8; 7 5; 6 9; 7 8; 5 1]; 
  3. 		 [4 8; 1 9; 9 9; 10 2; 1 6]};
  4.  
  5. % Test case to run
  6. testcase = 3;
  7.  
  8. I = cases{testcase};
  9.  
  10. for k=~eye(5);if nnz(convhull(I(k,1),I(k,2)))>4;I(k,:),end;end
  11.  
  12.  
Success #stdin #stdout 0.46s 121920KB
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ans =

    1    9
    9    9
   10    2
    1    6

ans =

    4    8
    9    9
   10    2
    1    6

ans =

    4    8
    1    9
   10    2
    1    6
https://ideone.com/8WQ5w0
language:
Octave (octave 4.4.1)
created:
8 years ago
visibility:
public

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