et $f:[0,3]\to A$ be defined by $,f(x)=2x^3-15x^2+36x+7,$ and $g:[0,\infty)\to B$ be defined by $,g(x)=\dfrac{x^{2025}}{x^{2025}+1}.$ If both the functions are onto and $S={x\in\mathbb{Z},:,x\in A\ \text{or}\ x\in B},$ then $n(S)$ is equal to: