4 5
1 1 1 1 0
1 0 -1 0 0
1 -1 0 0 2
1 1 1 -1 0
1 -1 1 0 2
1 1 -2 -2 -1
1 -1 0 2 3
1 1 0 0 -1
10 5
1 1 0 1 0
1 1 1 0 0
1 0 1 1 2
1 -3 1 -1 8
1 -3 1 1 8
1 0 1 -1 2
1 1 0 -1 0
1 1 -2 -1 0
1 -1 -3 2 6
1 1 -5 -2 2