polyomino_condense_test

POLYOMINO_CONDENSE_TEST:
  POLYOMINO_CONDENSE "cleans up" a matrix that is supposed
  to represent a polyomino:
  * nonzero entries are set to 1;:
  * initial and final zero rows and columns are deleted.

  The initial (3,3) polynomino P:

 0 1 1
 1 1 0
 0 1 0

  The condensed (3,3) polynomino Q:

 0 1 1
 1 1 0
 0 1 0

  The initial (3,3) polynomino P:

 0 1 2
 1 3 0
 0 -9 0

  The condensed (3,3) polynomino Q:

 0 1 1
 1 1 0
 0 1 0

  The initial (3,4) polynomino P:

 0 0 0 0
 1 3 0 0
 0 0 0 0

  The condensed (1,2) polynomino Q:

 1 1

  The initial (2,4) polynomino P:

 0 0 0 0
 0 0 0 0

  The condensed (0,0) polynomino Q:


POLYOMINO_CONDENSE_TEST:
  Normal end of execution.
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