and is guaranteed to find the best answer

I think you may have a bug. Given the input set [400 402 521 735 758 191 191 307 679 776 877], your code produces this partition: 

[400 402 521 735 758 191] := 3007
[191 307 679 776 877] := 2830

[download]

But there is a better partition: 

[679 776 307 877 191] := 2830
[400 402 521 758 735] := 2816

[download]
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In reply to Re: NP-complete sometimes isn't by BrowserUk
in thread NP-complete sometimes isn't by tilly

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