题解 | #称砝码#

while True:
    try:
        n = int(input())
        m = map(int,input().split())
        x = map(int,input().split())

        weight = {0}
        for mi,xi in zip(m,x):
            for i in range(xi):
                weight |= set([mi+s for s in weight])
        print(len(weight))
    except:
        break 



# while 1:
#     try:
#         n = int(input())
#         m = map(int, input().split())
#         x = map(int, input().split())
        
#         weights = {0}
#         for xi, mi in zip(x, m):
#             for i in range(xi):  # xi 表示有几个
#                 weights |= set([s+mi for s in weights])  # n个玛法，一个个加入set里面
#         print(len(weights))
#     except:
#         break