题解 | 称砝码

n = int(input())
m = [int(i) for i in input().split()]
x = [int(i) for i in input().split()]
total = []
for i in range(n):
    total += [m[i]] * x[i]

res = {0,}
for i in total:
    for j in list(res):
        res.add(i+j)
print(len(res))