6 10 3000
1000 6000
-1000 6000
-1000 1000
-5000 1000
-5000 -6000
1000 -6000
3000 0
0 0
0 1000
-1000 1000
-1000 -1000
0 -1000
0 -2000
1000 -2000
1000 -1000
3000 -1000
