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Cool. I knew (guessed) it was too easy, but it worked for several test sets. Thanks for the explanation.

Actually, scrap the above, because according to the wikipedia page,

The most common formulation of the problem is the 0-1 knapsack problem, which restricts the number xj of copies of each kind of item to zero or one.

So you can't have 2 of one item?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: knapsack problem solved by regex by BrowserUk
in thread knapsack problem solved by regex by rubasov

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