c

2
1 3
1 1 -1

1 3
1 -1 -1

0

1

1
2 4
1 1 0 0
1 -1 0 100

0 0 0

0

1
2
2 5
0 -1 1 0 0
1 0 0 -1 10

2 5
0 -1 -1 0 0
1 0 0 1 -11

0