Consider the graphs of the functions \( f(x, y) = (x - \lfloor x \rfloor)^2 + y^2 - (x - \lfloor x \rfloor) = 0 \) and \( g(x, y) = y - \frac{1}{5} x = 0 \). Determine the number of points at which these graphs intersect. Let's think step by step and output the final answer within \boxed{}.
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