2
20
0
  1 0
  1 1
-10 2
3
10
0
0  0   0
1  5   1
2 -100 3
7
10
0
0   0   0   0   3   0   0
1   1   1   1   1   1   2
2  -1   4  -2   2 -20   2
-1