Any suggestions about test 8 data?

It would be great, if somebody can provide corner case test.
Thanks.

Edited by author 14.10.2012 16:33

Edited by author 14.10.2012 16:33

7 6
1 1 1 1 1 5 5
1 3

Answer is 3. have you more than 3?

why 3?
{1,2,3,4,5,6}
{1,2,3,4,5,7}
{1,2,3,4,6,7}
{1,2,3,5,6,7}
{1,2,4,5,6,7}
{1,3,4,5,6,7}

dw bout him. My AC solution gives 6.