题解 | #称砝码#

n = int(input())
m = list(map(int,input().split()))
x = list(map(int,input().split()))
mx = []#只放一个砝码时有多少种情况
for i in range(n):
    mx.extend([m[i]]*x[i])
weights = {0}#每次只加一个砝码上去记录下此时的重量
for i in mx:
#每次放入一个i和重量记录表各个值相加得到新的砝码组合重量，集合自动去重
    weights = weights.union({i+j for j in weights})
print(len(weights))