4
1 0
3 0
3 2
1 2
3 1
0
Answers:
2.00000000

4
1 0
3 0
3 2
1 2
3 1
1
45
Answers:
2.00000000
2.00000000

4
1 0
3 0
3 2
1 2
3 1
2
45
-90
Answers:
2.00000000
2.00000000
0.50000000

4
1 0
3 0
3 2
1 2
3 1
2
-45
-45
Answers:
2.00000000
0.50000000
0.00000000

3
-2.000 1.000
1.000 -2.000
4.000 1.000
1.000 1.000
1
359
Answers:
9.00000000
0.00000000

test:
4
0 0
2 0
2 2
0 2
1 2
1
360

ans:
4
0

test:
4
0 0
2 0
2 2
0 2
2 1.5
3
180
-180
-180

ans:
3
1
1
0

Please, give me some tests