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## Homework Statement

A set contains numbers from 1-100. What is the least non-negative value that one can form by putting a + or - in front of each number, and summing the values?

## Homework Equations

there are a few general summation formulas which I know...

## The Attempt at a Solution

The problem that I am facing is the purpose:

by adding a + or - in front of each number

Is the question asking me to perform an alternating series? +, -, +, -, +, -

or solely one for 1+2+3+4+5.... and one for 1-2+3-4+5.....

Please give me some guidance... thanks

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