And now WA#13
        Baker's dozen!

Edited by author 25.04.2006 19:43

I have found the silly mistake
It's helped me:
23
0 8
1 2
2 1
2 3
2 4
2 5
2 6
3 1
3 2
3 3
3 4
3 5
3 7
4 1
4 2
4 4
4 6
5 1
5 3
5 5
6 2
6 4
7 3

what's the answer?

2
I have WA 14 many times, because cos between two vectors(use floating operations) some times give wrong result.
Solution accepted with EPS for comparation of cosinus = 1e-15.

Edited by author 24.10.2010 19:50