10 10
 0 1 0 0 0 0 0 0 0 0
 1 0 0 0 0 0 0 0 0 0
 0 0 -2 0 0 0 0 0 -1 0
 0 0 0 -2 1 0 1 -1 0 -1
 0 0 0 1 -2 -1 0 0 0 1
 0 0 0 0 -1 -2 0 0 -1 1
 0 0 0 1 0 0 -2 1 -1 1
 0 0 0 -1 0 0 1 -2 0 0
 0 0 -1 0 0 -1 -1 0 -2 1
 0 0 0 -1 1 1 1 0 1 -2
