A function is defined on [-3, 3] as
\(\rm f(x)=\left\{\begin{matrix}\rm min\{|x|,2-x^2\},&-2\le x\le2\\\ [|x|],&2<|x|\le 3\end{matrix}\right.\)
where [x] denotes the greatest integer funtion. The number of points, where f is not differentiable in (-3, 3) is ______.
Enter numerical value using the virtual keypad. Round off where necessary.