codeforce A. Black Square

A. Black Square

time limit per test：1 second

memory limit per test：256 megabytes

input：standard input

output：standard output

题目链接

http://codeforces.com/problemset/problem/431/A

原题

Quite recently, a very smart student named Jury decided that lectures are boring, so he downloaded a game called "Black Square" on his super cool touchscreen phone.

In this game, the phone's screen is divided into four vertical strips. Each second, a black square appears on some of the strips. According to the rules of the game, Jury must use this second to touch the corresponding strip to make the square go away. As Jury is both smart and lazy, he counted that he wastes exactly ai calories on touching the i-th strip.

You've got a string s, describing the process of the game and numbers a1, a2, a3, a4. Calculate how many calories Jury needs to destroy all the squares?

Input

The first line contains four space-separated integers a1, a2, a3, a4 (0 ≤ a1, a2, a3, a4 ≤ 104).

The second line contains string s (1 ≤ |s| ≤ 105), where the і-th character of the string equals "1", if on the i-th second of the game the square appears on the first strip, "2", if it appears on the second strip, "3", if it appears on the third strip, "4", if it appears on the fourth strip.

Output

Print a single integer — the total number of calories that Jury wastes.

Examples

input

1 2 3 4
123214

output

13

input

1 5 3 2
11221

output

13

题目大意

给你Jury下载了一个“Black Square”的游戏，就类似别踩白块儿吧，然后手机屏幕被分成4个垂直的条纹，Jury没点击一个条纹上的黑块都需要消耗一定的卡路里，然后第一行给出4个数字，代表点击这4个条纹分别需要的卡路里，第二行输入的是他点击的次序，只要把所有的消耗的卡路里都加起来就可以了

代码

while True:
	try:
		a,b,c,d=map(int,input().split())
		s=input()
		ans=0
		for i in s:
			if i=='1':
				ans+=a
			elif i=='2':
				ans+=b
			elif i=='3':
				ans+=c
			elif i=='4':
				ans+=d
		print(ans)
	except:
		break