Is the 0-1 Knapsack problem where value equals weight NP-complete?

Problem Detail: I have a problem which I suspect is NP-complete. It is easy to prove that it is NP. My current train of thought revolves around using a reduction from knapsack but it would result in instances of 0-1-Knapsack with the value of every item being equal to its weight. Is this still NP-complete? Or am I missing something?

Asked By : Zeta Two

Answered By : Aryabhata

Yes, this is called the subset-sum problem and is NP-Hard.
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Question Source : http://cs.stackexchange.com/questions/11243