Finding a solutions for an equation

co.combinatorics – make use of n totally different intergers +, or – to make equations, discover o numbersut the unused numbers retort

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co.combinatorics – make use of n totally different intergers +, or – to make equations, discover o numbersut the unused numbers

i’m only a common Chinese scholar and i can not talk effectively with English.the query is there are n totally different intergers,we will make use of +or –
to make equations to let the end result breathe zero.(in a single equations a quantity will breathe used no a couple of time)
The algorithm is to seek out all of the numbers in n intergers that may’t breathe utilized in equations.( as an example ,n=4, 2 3 5 11 11is the output )it’s a Np query,however when the sum of intergers is diminutive we will make use of vigorous program.But i do not know the way to maintain a O(nS) or O(lgnnS) algorithm. Maybe this query is unostentatious but it surely puzzles me for a very long time.

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