Contest Clarifications

I am wondering how could we get the sample...
3 1 3
1 2 3 4
1 4 2
2 4 2
3 4 4 


as you see, i don't know why the answer is 6 for this case, i am not asking for why ,i am just wonder if the sample is correct...tks for u help
AekdyCoin at 2010-02-06 15:15:43

RE:I am wondering how could we get the sample...
oh..i got it..
they don't have to be connected..
AekdyCoin at 2010-02-06 15:19:23