Let $f: R \rightarrow R$ and $g: R \rightarrow R$ be respectively given by $f(x)=|x|+1$ and $g(x)=x^2+1$. Define $h: R \rightarrow R$ by $h(x)=\left\{\begin{array}{ll}\max & \{f(x), g(x)\} \\ \min & \{f(x), g(x)\} \\ \min x \leq 0,\end{array}\right.$ The number of points at which $h(x)$ is not differentiable is