Let m and n be the number of points at which the function f(x)= max {x, x^3, x^5, …, x^21}, x ∈ R, is not differentiable and not continuous,…

Let $\displaystyle m$ and $\displaystyle n$ be the number of points at which the function $\displaystyle f(x)=\max \left\{x, x^3, x^5, \ldots, x^{21}\right\}, x \in \mathbb{R}$, is not differentiable and not continuous, respectively. Then $\displaystyle m+n$ is equal to $\displaystyle \_\_\_\_$