题解 | #称砝码#

while True:
    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):
                weights |=set([mi+s for s in weights])
        print(len(weights))
    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):
    #             weights |= set([s+mi for s in weights])
    #     print(len(weights))
    # except:
    #     break