题解 | #称砝码#

# 优秀解法
import sys

while True:
    try:
        n = int(input())
        l1 =list(map(int, input().split()))
        l2 = list(map(int, input().split()))
        t = []
        for item, num in zip(l1,l2):
            for i in range(num):
                t.append(item)
        res = {0}
        for x in t:
            for item in list(res):
                res.add(item + x)
        print(len(res))

    except:
        break