Intersecting Intervals (Easy)

**This is the easy version of the problem. Here, there are no queries.** Given $2$ arrays $A$ and $B$, both of length $N$, define $f(A, B)$ as follows: - Choose $2$ intervals $[L_1, R_1]$, $[L_2, R_2]$ such that: - $1 \le L_i \le R_i \le N$ - $[L_1, R_1] \cap [L_2, R_2]$ is non-empty, i.e. they share at least one point. - The score of this choice of intervals is defined as $\displaystyl