题解 | #称砝码#

n = int(input())
m = list(map(int,input().split()))
x = list(map(int,input().split()))
amount = []

for i in range(n):
    for j in range(x[i]):
        amount.append(m[i])

weight = {0,}
for i in amount:
    for j in list(weight):
        weight.add(i + j)
#print(weight)
print(len(weight))