5

-1 2     5  2 4
1 1 1 1 1
1 2 0 1

1 2      3  3 1
1 1 2
2 0

0 0      4  2 4
0 0 0 0
0 0 0

0 0      1  1 1
2
5

-1 2     5  2 4
1 1 1 1 1
1 2 0 1

1 2      3  3 1
1 1 2
2 0

0 0      4  2 4
0 0 0 0
0 0 0

0 0      1  1 1
2