题解 | #中彩票的的概率#
中彩票的的概率
https://www.nowcoder.com/practice/531e409e1b564cfbbb275c6a8d3a4b45
from operator import index
k = input().split()
v = map(float, input().split())
dic=dict(zip(k,v))
sum=1
in0 = input().split()
for i in in0:
if i in dic:
sum=sum*dic[i]
print(round(sum,3))
