题解 | #称砝码#

import sys

n = int(input())
m=list(map(int,input().split()))
x=list(map(int,input().split()))
res={0}
for i in range(n):
    for j in range(x[i]):
        for k in list(res):
            if m[i]+k not in res:
                res.add(m[i]+k)
print(len(res))