Please, show 9 test.
Who make this problem, public your solution, please.

Probably you should try to find a bug in your code. It doesn't look like this problem have any troubles with test data.

Without test very hardly found bugz in code :-(

But actually you have to obtain this useful skill.

I have WA9 too.
try test:
3 1 2 1
1 3
1 2

I don't think that 9 test has smth special) I had a very stupid bug in my code and so had WA#9)
Failed test was
10 1 7 1
1 8
2 3
3 4
4 5
5 6
6 7
7 8
IMHO Cool problem)

I also fall on test 9, but both of these tests work fine. What was the bug you corrected?

Edited by author 27.05.2008 02:28

Post some tests please.