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

題目鏈接

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

原題

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

題目大意

給你Jury下載了一個“Black Square”的遊戲，就類似別踩白塊兒吧，然後手機屏幕被分成4個垂直的條紋，Jury沒點擊一個條紋上的黑塊都需要消耗一定的卡路里，然後第一行給出4個數字，代表點擊這4個條紋分別需要的卡路里，第二行輸入的是他點擊的次序，只要把所有的消耗的卡路里都加起來就可以了

代碼

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