# Determining if a Product is Positive or Negative

Recall the following properties of multiplication of signed numbers:

(positive)(positive) = positive

(positive)(negative) = negative

(negative)(negative) = positive

When more than two numbers are being multiplied,
just count the number of minus signs:
any *even* number of minus signs
collapses to a *plus* sign;
any *odd* number of minus signs collapses to a
*minus* sign.

## Examples

## Practice

Input your answer as: $\quad+\quad$ or $\quad-$