题解 | #称砝码#

while True:
    try:
        a = input()
        b = input().split(' ')
        c = input().split(' ')
        d = []
        e = [0]
        ee = {0,}
        for i in range(int(a)):
            for j in range(int(c[i])):
                d.append(int(b[i]))
        for i in d:
            for j in list(ee):
                ee.add(i+j)
            # for j in e:
            #     if i+j not in e:
            #         e.append(i+j)
        print(len(ee))
            

    except:
        break