a solution to the Subset Sum Problem

[Skaperen]

@league55: what 2-set do you mean that has a sum of 0?

Output:
>>> sum({-3,13})==0
False
>>>

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Output:
>>> s
{0, 2, 5, 7, 13, -3}
>>> [ (p,q) for p in s for q in s if p!=q and sum({p,q})==0 ]
[]
>>>