A15916 | LuoTianyi and Cartridge

LuoTianyi is watching the anime Made in Abyss. She finds that making a Cartridge is interesting. To describe the process of making a Cartridge more clearly, she abstracts the original problem and gives you the following problem.

You are given a tree $T$ consisting of $n$ vertices. Each vertex has values $a_i$ and $b_i$ and each edge has values $c_j$ and $d_j$ .

Now you are aim to build a tree $T'$ as follows:

- First, select $p$ vertices from $T$ ( $p$ is a number chosen by yourself) as the vertex set $S'$ of $T'$ .
- Next, select $p-1$ edges from $T$ one by one (you cannot select one edge more than once).
- May you have chosen the $j$ -th edge connects vertices $x_j$ and $y_j$ with values $(c_j,d_j)$ , then you can choose two vertices $u$ and $v$ in $S'$ that satisfy the edge $(x_j,y_j)$ is contained in the simple path from $u$ to $v$ in $T$ , and link $u$ and $v$ in $T'$ by the edge with values $(c_j,d_j)$ ( $u$ and $v$ shouldn't be contained in one connected component before in $T'$ ).

 A tree with three vertices, $\min(A,C)=1,B+D=7$ , the cost is $7$ .  Selected vertices $2$ and $3$ as $S'$ , used the edge $(1,2)$ with $c_j = 2$ and $d_j = 1$ to link this vertices, now $\min(A,C)=2,B+D=4$ , the cost is $8$ .Let $A$ be the minimum of values $a_i$ in $T'$ and $C$ be the minimum of values $c_i$ in $T'$ . Let $B$ be the sum of $b_i$ in $T'$ and $D$ be the sum of values $d_i$ in $T'$ . Let $\min(A, C) \cdot (B + D)$ be the cost of $T'$ . You need to find the maximum possible cost of $T'$ .

The first line contains one integer $n$ ( $3\le n \le 2\cdot 10^5$ ) — the number of vertices in the tree $T$ .

The second line contains $n$ integers $a_1, a_2, \ldots, a_n$ ( $1\le a_i\le 2\cdot 10^5$ ), where the $i$ -th integer represents the $a_i$ value of the $i$ -th vertex.

The third line contains $n$ integers $b_1, b_2, \ldots, b_n$ ( $1\le b_i\le 2\cdot 10^5$ ), where the $i$ -th integer represents the $b_i$ value of the $i$ -th vertex.

Then $n-1$ lines follow, the $j$ -th of them contains four integers $x_j,y_j,c_j,d_j$ ( $1\le x_j,y_j\le n,1\le c_j,d_j\le 2\cdot 10^5$ ) representing the edge $(x_j,y_j)$ and its values $c_j$ and $d_j$ respectively. It's guaranteed that edges form a tree.

Print a single integer — the maximum possible cost of $T'$ .