# This example was contributed by Rachid Seghir <rachid.seghir@gmail.com>
9 8
 0  1 -4 -7 -2 -5  0 -1
 1  0  1  0  0  0  0 -1
 1  0 -42 0  0  0  3  4
 1  0  0  1  0  0  0 -1
 1  0  0 -1  0  0  0  5
 1  0  0  0  1  0  0 -1
 1  0  0  0 -1  0  2  0
 1  0  0  0  0  1  0 -1
 1  0  0  0  0 -1  3  2

E 4 
P 1

N 


