题解 | #中彩票的的概率#
中彩票的的概率
https://www.nowcoder.com/practice/531e409e1b564cfbbb275c6a8d3a4b45
a=list(input().split(' '))
b=list(input().split(' '))
c=list(input().split(' '))
zidian={}
n=len(a)
for i in range(n):
u=a[i]
v=b[i]
zidian[u]=v
aa=1
for m in c:
bb=zidian[m]
aa=aa*float(bb)
print(round(aa,3))
