5
2 0
2
3
1 0
3 0
4 0
2 0
1
3
1 0
3 0
4 0
5 5
10
4
0 0
10 0
10 10
0 10
0 0
2
6
-1 -1
0 8
0 9
0 10
10 1
10 2
0 0
10
6
-1 -1
0 8
0 9
0 10
10 1
10 2