# Cause we're young and we're reckless

Logic Level 3

$2^0 \, \square \, 2^1 \, \square \, 2^2 \, \square \, \ldots \, \square \, 2^n = 1991$

For positive integer $$n$$, there are $$2^n$$ ways in which we can fill the squares with $$+, -$$. To make the equation true, how many of these squares are addition signs?

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