题解 | #称砝码#

while True:
    try:
        n = int(input())
        m = input().split(" ")
        x = input().split(" ")
        # mx为所有砝码，比如示例mx为[1, 1, 2]
        mx= []
        # l = {0}
        l, f = [0], [0]
        for i in range(n):
            mx.extend([int(m[i])] * int(x[i]))
        for i in mx:
            for j in l:
                weight = i + j
                f.append(weight)
            l = f
            f = list(set(f))
        print(len(f))
        # print(len(l))
    except:
        break