Let $\displaystyle S_i$ be the set of all integers $\displaystyle n$ such that $\displaystyle 100i\leq n < 100(i + 1)$. For example, $\displaystyle S_4$ is the set $\displaystyle \{400,401,402,\ldots,499\}$. How many of the sets $\displaystyle S_0, S_1, S_2, \ldots, S_{999}$ do not contain a perfect square?