7
-2 0 0 2 2 0
-2 1 2 1
-2 0 0 2 0 0
-3 0 3 0
-2 0 0 0 2 2
-2 2 2 0
0 2 -2 -2 2 -2
-2 2 2 -2
-2 2 2 2 0 0
-2 0 1 1
-1000 -1000 1000 1000 0 -1000
1000 0 -1000 0
-500 500 500 500 0 -1000
-1000 0 1000 0