B - Buffet /

### 問題文

また、料理 i (1 \leq i \leq N - 1) を食べた直後に料理 i+1 を食べると満足度 C_i を追加で得ます。

### 制約

• 入力は全て整数である。
• 2 \leq N \leq 20
• 1 \leq A_i \leq N
• A_1, A_2, ..., A_N は全て異なる。
• 1 \leq B_i \leq 50
• 1 \leq C_i \leq 50

### 入力

N
A_1 A_2 ... A_N
B_1 B_2 ... B_N
C_1 C_2 ... C_{N-1}


### 入力例 1

3
3 1 2
2 5 4
3 6


### 出力例 1

14


• 高橋くんはまず料理 3 を食べ、満足度 4 を得ました。
• 高橋くんは次に料理 1 を食べ、満足度 2 を得ました。
• 高橋くんは最後に料理 2 を食べ、満足度 5 + 3 = 8 を得ました。

### 入力例 2

4
2 3 4 1
13 5 8 24
45 9 15


### 出力例 2

74


### 入力例 3

2
1 2
50 50
50


### 出力例 3

150


Score : 200 points

### Problem Statement

Takahashi went to an all-you-can-eat buffet with N kinds of dishes and ate all of them (Dish 1, Dish 2, \ldots, Dish N) once.

The i-th dish (1 \leq i \leq N) he ate was Dish A_i.

When he eats Dish i (1 \leq i \leq N), he gains B_i satisfaction points.

Additionally, when he eats Dish i+1 just after eating Dish i (1 \leq i \leq N - 1), he gains C_i more satisfaction points.

Find the sum of the satisfaction points he gained.

### Constraints

• All values in input are integers.
• 2 \leq N \leq 20
• 1 \leq A_i \leq N
• A_1, A_2, ..., A_N are all different.
• 1 \leq B_i \leq 50
• 1 \leq C_i \leq 50

### Input

Input is given from Standard Input in the following format:

N
A_1 A_2 ... A_N
B_1 B_2 ... B_N
C_1 C_2 ... C_{N-1}


### Output

Print the sum of the satisfaction points Takahashi gained, as an integer.

### Sample Input 1

3
3 1 2
2 5 4
3 6


### Sample Output 1

14


Takahashi gained 14 satisfaction points in total, as follows:

• First, he ate Dish 3 and gained 4 satisfaction points.
• Next, he ate Dish 1 and gained 2 satisfaction points.
• Lastly, he ate Dish 2 and gained 5 + 3 = 8 satisfaction points.

### Sample Input 2

4
2 3 4 1
13 5 8 24
45 9 15


### Sample Output 2

74


### Sample Input 3

2
1 2
50 50
50


### Sample Output 3

150