why I get wa on test 23?

this problem ROCKS >D

Try it:
8 3 3
2 4
5 8
1 6
Answer: 6

What is the answer for the test:
10 5 2
2 8
4 6
?
Mine is 4. Am I correct? Or is the answer 6 or 10?
L.E.: Nevermind I ACed. Answer is 4.
Edited by author 22.09.2010 20:24

Edited by author 24.09.2010 01:45