Note that the memory limit is unusual.

You are given an integer $n$ and two sequences $a_1, a_2, \dots, a_n$ and $b_1, b_2, \dots, b_n$.

Let's call a set of integers $S$ such that $S \subseteq \{1, 2, 3, \dots, n\}$ strange, if, for every element $i$ of $S$, the following condition is met: for every $j \in [1, i - 1]$, if $a_j$ divides $a_i$, then $j$ is also included in $S$. An empty set is always strange.

The cost of the set $S$ is $\sum\limits_{i \in S} b_i$. You have to calculate the maximum possible cost of a strange set.