Solution
= Solution
Write the <bit vector> as $a=(a_{n-1},\ldots,a_0)$, with $a_0$ the <least significant bit>. Its <unsigned interpretation of a bit string> is \b[$\operatorname{bin}(a)=\sum_{i=0}^{n-1}a_i2^i$], where each $a_i\in\{0,1\}$. The range is the <integers> from $0$ through $2^n-1$; a leading one contributes positive weight $2^{n-1}$, not a sign.