Knapsack Problem Without Value

[geezle86 at gmail.com]

Hi,

I wanna ask about Knapsack. I do understand what Knapsack is about. But this one i faced is a different problem. There is no value. I mean, it's like this, for example.

I have 4 beams [X0, X1, X2, X3]. Each 1, 2, 2, 3 cm long. I want to make a new 6 cm long connected-beam from these 4 beams. I can make it from some of these. The output will print:

1, 2, 3 #(X0, X1, X3)

You understand what my problem is? Can you help me?

Sincerely,