10
1 1 3 3
0 2 2 0
0 2 2 2
0 2 1 1
0 3 3 0
-1 -1 1 1
0 0 2 -2
2 1 3 -2
2 2 8 8
2 1 2 3
1 1 2 2
0 0 2 2
-1 -2 -3 -2
-99 -99 -3 -3